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Ice climber
great white north
Sep 11, 2014 - 06:35am PT
The 97 Climate Scientists from

#1 Professor Michael Mann ... Pennsylvania State University ... Expertise: Past climate change, atmospheric dynamics, oceanography
There are now dozens of hockey sticks and they all come to the same basic conclusion. The recent warming does appear to be unprecedented as far back as we can go. But even if we didn’t have that evidence, we would still know that humans are warming the planet, changing the climate and that represents a threat if we don’t do something about it.

#2 Professor Katharine Hayhoe ... Texas Tech University ... Expertise: Climate impacts
Year by year, decade by decade, gradually over long periods of time, we see that the earth’s temperature is rising and we know from very careful scientific studies that have been done, that the majority of this warming is due to human production of heat-trapping gases.

#3 Professor Marshall Shepherd ... University of Georgia ... Expertise: Atmospheric sciences, water cycle
Weather is your mood and climate is your personality. So on any given day, you can have really cold weather or really violent weather. But the scientific literature does suggest that our climate
is changing. Almost every weather phenomenon happens in a warmer and more moist climate.

#4 Dr. Peter Gleick ... Pacific Institute ... Expertise: Water & climate
We know that humans are raising the temperature through the emission of greenhouse gases. We’re beginning to change the climate. Among the things that we’re going to see is more of the hydrologic cycle is going to be rain, and less of it’s going to be snow. As it gets warmer, the snow line is going to move up. What does fall as snow is going to melt earlier, and runoff faster.

#5 Dr. Gavin Schmidt ... NASA Goddard Institute for Space Studies ... Expertise: Climate modelling, climate variability
...what we anticipate is that because we’re continuing to add carbon dioxide to the system, we’re going to continue to warm decade by decade by decade. The exact magnitude of where we’re going to go is going to depend a little bit on the system, but also on the decisions that we make as a society to either reduce carbon emissions or just to carry on with business as usual.

#6 Professor Maureen Raymo ... Columbia University ... Expertise: Past climate change, past sea level rise
Everything I’ve learned about our planet’s past climate history places me, like most of my colleagues, in the camp that says we need to take preventive action to keep the planet from warming further.

#7 Professor Jason Box ... Geological Survey of Denmark and Greenland ... Expertise: Glaciology, Greenland ice sheet
There’s no debate. It’s really quite simple. We’ve overloaded the atmosphere with heat trapping gas and the rest are just details.

#8 Professor Simon Donner ... University of British Columbia ... Expertise: Climate variability, coral reef impacts
The take-home message of my coral reef research is that without serious, near-term efforts to reduce greenhouse gas emissions and to increase coral reef resilience, the world’s coral reefs will experience dangerously frequent mass bleaching events within decades.

#9 Professor Andrew Dessler ... Texas A&M University ... Expertise: Atmospheric chemistry, climate change
Climate change is coming. If you want to know what it looks like, just look at the Midwest right now. It’s drought; it’s heat. Warmer temperatures don’t mean barbecues and tank tops. It means drought; it means fire; it means suffering.

#10 Professor Piers Forster ... University of Leeds ... Expertise: Climate modelling, climate impacts
Compare climate change to a train trundling across America. Some way down the track, we are not sure how far, the bridge is out and disaster looms. Do we want to be the ones to sit back and watch the train wreck, or do we want to be the hero?

#11 Dr. Ken Caldeira ... Carnegie Institution for Science ... Expertise: Ocean acidification, climate impacts, carbon cycle
If you’re talking about mugging little old ladies, you don’t say, ‘What’s our target for the rate of mugging little old ladies?’ You say, ‘Mugging little old ladies is bad, and we’re going to try to eliminate it.’ You recognize you might not be a hundred per cent successful, but your goal is to eliminate the mugging of little old ladies. And I think we need to eventually come around to looking at carbon dioxide emissions the same way.

#12 Professor Richard Alley ... Pennsylvania State University ... Expertise: Glaciology, Sea Level Change
So we know the globe is warm. If you look today, the average temperature of the whole world is above its long-term average. If you look in the north, in the Arctic, it’s a good bit above. The Northern Hemisphere is, the Southern Hemisphere is, the tropics are, the Antarctic are. The big enough pieces are above average. And that’s because we’ve raised CO2 in the atmosphere.

#13 Professor David Karoly ... University of Melbourne ... Expertise: Climate variability, weather extremes
It’s clear that human-caused changes in climate, particularly due to the increases in greenhouse gases in the atmosphere, will get worse for a substantial period of time. And we know that increasing greenhouse gases in the atmosphere are already causing large-scale changes in temperature, increasing temperatures around the globe.

#14 Dr. Ben Santer ... Lawrence Livermore National Laboratory ... Expertise: Climate change attribution
We look at many, many different aspects of climate change and they’re telling us an internally and physically consistent story. The message in that story is clear: Humans are affecting the global climate, and natural causation alone can’t explain the observed changes that we see.

#15 Professor Lonnie Thompson ... Ohio State University ... Expertise: Past climate change, glaciology
...there is now a very clear pattern in the scientific evidence documenting that the earth is warming, that warming is due largely to human activity, that warming is causing important changes in climate, and that rapid and potentially catastrophic changes in the near future are very possible.

#16 Dr. Kevin Trenberth ... National Center for Atmospheric Research ... Expertise: Climate variability, hydrological cycle
When we see records being broken and unprecedented events, the onus is on those who deny any connection to climate change to prove their case. Global warming has fundamentally altered the background conditions that give rise to all weather. In the strictest sense, all weather is now connected to climate change.

#17 Professor Jennifer Francis ... Rutgers University ... Expertise: Marine & coastal sciences
We've lost about 75% of the Arctic's sea ice in just 30 years. It doesn't take a scientist to see this huge change in the climate system, and we know it's mainly due to the extra heat trapped by increasing greenhouse gases from burning fossil fuels. Watching the Arctic warm so fast gives me
the chills!

#18 Professor Rob Dunbar ... Stanford University ... Expertise: Climate Dynamics, Oceanography
You know, thousands of scientists have been working on understanding all of these man-made causes and the natural causes. And we've got it worked out, and we can say, ‘Yes, CO2 is causing the planet to warm up now.’

#19 Dr. Daniel Nepstad ... Amazon Environmental Research Institute ... Expertise: Tropical forest ecology
This study is the strongest evidence yet that the world’s natural ecosystems will undergo profound changes—including severe alterations in their species composition—through the combined influence of climate change and land use. Conservation of the world’s biota, as we know it, will depend upon rapid, steep declines in greenhouse gas emissions.

#20 Professor Eric Rignot ... University of California, Irvine ... Expertise: Glaciology, climate change, remote sensing
Unabated climate warming of several degrees over the next century is likely to speed up the collapse of West Antarctica, but it could also trigger irreversible retreat of marine-based sectors of East Antarctica. Whether we should do something about it is simply a matter of common sense. And the time to act is now; Antarctica is not waiting for us.

#21 Professor Jeremy Shakun ... Boston College ... Expertise: Paleoclimate
We are heading for somewhere that is far off from anything we have seen in the past 10,000 years – it’s through the roof. In my mind, we are heading for a different planet to the one that we have been used to.

#22 Dr. Wenju Cai ... CSIRO ... Expertise: Climate variability, climate impacts
The increase of carbon dioxide and other greenhouse gases in the atmosphere has been the major driver of the surface warming of the Earth over the 20th century. This is projected to continue.

#23 Professor Timothy Naish ... Antarctic Research Centre ... Expertise: Ice sheets, Antarctica
If you maintain carbon dioxide levels of 400ppm and commit the planet to an atmosphere of that composition for the next 100 years, then you stand a chance of losing both the Greenland Ice Sheet and the West Antarctic Ice Sheet, having sea level potentially 10m higher than it is today.

#24 Professor Raymond Pierrehumbert ... University of Chicago ... Expertise: Climate models, past climate change
Some people seem to think that the whole global-warming concern dates back just to the 1990s, that it was put together by a bunch of environmentalists. But in fact, the physics go back almost two centuries ... By emitting so much carbon, we’ve really created a new geological era. The Holocene is over, and how different the Anthropocene is going to be depends on how much coal and oil we burn.

#25 Dr. Ailie Gallant ... Monash University ... Expertise: Climate extremes, climate variability, palaeoclimate
Building any scientific theory is like putting together pieces of a jigsaw puzzle. Pieces of evidence are assembled in order to resolve the complete picture. And the picture has never been clearer for the puzzle of human-induced climate change.

#26 Professor Stefan Rahmstorf ... Potsdam University ... Expertise: Paleoclimate, sea level rise, extreme events
Adding greenhouse gases to our atmosphere traps heat and thus raises temperatures - that is basic physics known since the 19th Century, and it is exactly what we've been observing for decades. That's why there is a 97-98% consensus amongst climate researchers that human-caused emissions are causing global warming.
private correspondance

#27 Professor John Bruno ... University of North Carolina ...Expertise: Marine biodiversity, coral reef ecology
One of the many factors causing the global loss of reef building corals is anthropogenic climate change, which is slowly warming the world's oceans. When summertime temperatures are warmer than usual, corals can die from 'bleaching' and disease outbreaks. This in turn is devastating for the countless organisms that inhabit coral reefs.

#28 Professor Matthew Collins ... University of Exeter ... Expertise: Climate modelling, climate variability
Further emissions of greenhouse gases will cause further global warming. The Arctic will warm most rapidly and the land will warm more than the ocean. There will be more hotter and fewer cold days. Avoiding 2 degrees of warming since preindustrial times will be very tough. We have already ‘spent’ more than two thirds of the CO2 emissions that we can afford to spend.

#29 Dr. Heidi Cullen ... Chief Climatologist for Climate Central & Visiting Lecturer at Princeton University ... Expertise: Climatology, ocean-atmosphere dynamics
We are seeing CO2 going up—it is a measurable trend, not a cyclical phenomenon. On her own, Mother Nature’s earth cannot reproduce the observed global temperature record we have measured over the past century. Solar activity, volcanoes, and variability of other types are important, but on their own they simply cannot produce the significant warming trend we are now experiencing.

#30 Dr. Warren Washington ... National Center for Atmospheric Research ... Expertise: computer modeling of Earth's climate
To get the kinds of climatic conditions we have today, you need that increase in carbon dioxide. For anyone doubtful about the effect of human activity on global warming, that finding really is a 'smoking gun'.

#31 Professor Kerry Emanuel ... Massachusetts Institute of Technology ... Expertise: climate models
Back in the 1980s, I did not feel there was enough evidence to warrant much concern about climate change. But great advances in paleoclimate, analysis of in-situ and satellite observations, my own acquisition of some basic understanding of climate physics and, yes, climate models have all added up to very compelling evidence that we are changing climate and engendering serious risks in doing so.

#32 Professor Veerabhadran Ramanathan ... University of California, San Diego ... Expertise: climate change mitigation
The additional heat trapped by the increase in greenhouse gases from the late nineteenth century to the present time has committed the planet to a global warming in the range of 1°C to 3°C. We have realized only a fraction (25–50 percent) of this warming. ... Every decade we delay in taking action, we are committing the planet to additional warming that future generations have to deal with.

#33 Professor Ann Henderson Sellers ... Macquarie University ... Expertise: Climate change models & communication
With the latest IPCC Assessment Report from 2007 the question is no longer about whether human activities are changing the climate, but about how fast and with what impacts? Frankly, I find it discouraging that climate sceptics and greenhouse nay-sayers still get so much attention in our mass media - and apparently credibility with the general public.

#34 Professor Matthew England ... University of New South Wales ... Expertise: Oceanography, ocean modelling & climate processes
First, greenhouse gases trap heat. This has been known for almost 200 years. Second, fossil fuel burning is driving dramatically higher concentrations of these greenhouse gases in the atmosphere, and so as a direct result, extra heat is being held in the Earth's climate system. This is warming the oceans, the atmosphere, and melting ice at unprecedented levels. And third, doing nothing to limit fossil fuel burning will lead to costly and dangerous levels of climate change.

#35 Dr. Gerald Meehl ... National Center for Atmospheric Research ... Expertise: El Niño, anthropogenic forcings
Even if you stabilize the concentration of greenhouse gases, you are still committed to a certain amount of climate change no matter what you do because of the lag in the ocean. The longer you wait to do something, the more climate change you are committed to in the future.

#36 Professor Gabriele Hegerl ... University of Edinburgh ... Expertise: Climate modelling & observation
Greenhouse warming has very likely already influenced global temperatures and will continue to do so. The chance that the warming is small is slim.

#37 Professor Keith Shine ... University of Reading ... Expertise: Earth's radiation budget
There is unquestionable evidence that human activity has changed the composition of the atmosphere, and there is very strong evidence that this has lead to a change in climate.

#38 Professor Reto Knutti ... Institute for Atmospheric and Climate Science, ETH Zurich ... Expertise: Future climate change, feedback processes
Climate change is a fact and humans are very likely responsible for most of it. Temperature responds strongly to CO2, a fact seen in the observed warming, in climate models, and in reconstructions of past climate.

#39 Dr. Josefino Comiso ... NASA Goddard Space Flight Center ... Expertise: Satellite data, air-sea-ice interactions
The perennial ice cover, or ice that survives the summer melt, has been observed as part of the Arctic sea ice cover for 1,450 years. The extent of the perennial ice has been declining at a rapid rate of about 11% per decade. The observed rate of decline is expect to continue because of anthropogenic global warming which is expected to be amplified in the Arctic region because of ice-albedo feedback.
private communication

#40 Professor Noah Diffenbaugh ... Woods Institute for the Environment ... Expertise: Climate dynamics, climate impacts
We know from past changes that ecosystems have responded to a few degrees of global temperature change over thousands of years. But the unprecedented trajectory that we're on now is forcing that change to occur over decades. That's orders of magnitude faster, and we're already seeing that some species are challenged by that rate of change.

#41 Professor Paul Shepson ... Purdue University ... Expertise: Analytical & atmospheric chemistry
Humans have significantly changed the composition of the atmosphere, and those changes are impacting human health directly, and indirectly through impacts of the health and diversity in the biosphere.

#42 Professor Eric Wolff ... University of Cambridge ... Expertise: Past climate, glacial cycles, ice cores
We do know why CO2 causes warming. It's basic physics that's been known for more than a century. It's pretty straightforward. If you put more CO2 and other greenhouse gases into the atmosphere, it will get warmer - there is no way around that one.

#43 Professor Mojib Latif ... Helmholtz Centre for Ocean Research Kiel ... Expertise: Climate variability, model development
There is no doubt within the scientific community that we are affecting the climate, that the climate is changing and responding to our emissions of greenhouse gases.

#44 Professor Inez Fung ... University of California, Berkeley ... Expertise: Biogeochemical cycles, carbon cycle
As CO2 rises, because we understand the physics of the CO2 warming, more warming is expected. There are natural processes which amplify the warming from CO2 - the warmer air can hold more moisture - water vapour is a greenhouse gas and so that amplifies the initial warming. The melting of ice exposes a darker surface and so more sunlight is absorbed. So we are very sure that the CO2 rise will lead to more warming.

#45 Dr. Richard Feeley ... Texas A&M University ... Expertise: Carbon cycling, ocean acidification
Carbon dioxide is an acid gas. It reacts with water to form carbonic acid. And then that carbonic acid completely disassociates. It forms a hydrogen ion and bicarbonate, and in doing so, it reduces the pH of seawater. Since the beginning of the Industrial Revolution, that pH change has been about 0.1 pH units, which is a 30 % rise in acidity of the surface ocean.

#46 Dr. Shaun Marcott ... Oregon State University ... Expertise: Ice cores, statistical modeling
The rate of change in the last 100 years is very much unprecedented compared to anything we've seen in the last 10,000 years. I'm fairly certain that what we're experiencing is unusual.

#47 Dr. Pieter Tans ... NOAA Earth System Research Laboratory ... Expertise: Measuring atmospheric gases, paleoclimate
CO2 in the atmosphere, currently, is higher than it has been in at least two million years. What is also significant is that the rate of increase is rapid. The current rate of increase, as measured on average over the last decade, has been 2ppm per year. This is at least 100 times higher than at any time in the last 800,000 years.

#48 Professor Ove Hoegh-Guldberg ... University of Queensland ... Expertise: Global warming & acidification impacts on coral reefs
The latest IPCC report makes no bones about stating the consensus that human-driven climate change is occurring and it is important. Hundreds of changes have already been observed that are consistent with climate change, temperature rises and associated issues such as ocean acidification.

#49 Dr. James Hansen ... Columbia University Earth Institute ... Expertise: Radiative transfer in planetary atmospheres
We have known since the 1800s that carbon dioxide traps heat in the atmosphere. The right amount keeps the climate conducive to human life. But add too much, as we are doing now, and temperatures will inevitably rise too high.

#50 Professor Bill Ruddiman ... University of Virginia ... Expertise: Paleoclimate, impact of early agriculture
The public is starting to understand that the vast majority of scientists accept that we have done already something to climate and projections into the future are worrisome.

#51 Dr. Penny Whetton ... CSIRO Marine and Atmospheric Research ... Expertise: Impacts of climate change
Rapid global warming of 4ºC would be unlike anything experienced before by modern human societies – presenting us with huge challenges in terms of our ability to adapt ... although some climate change is inevitable, changes of the magnitude described here are still avoidable as long as we are able to significantly reduce global greenhouse emissions.

#52 Professor Marcia McNutt ... Editor-in-Chief, Science magazine ... Expertise: Marine geophysics
Carbon dioxide that is released into the atmosphere by burning fossil fuels changes ocean temperature, alters ocean circulation and makes the ocean more acidic. These changes affect the productivity of ocean fisheries and influence how we manage the ocean, but it is ocean acidification, in particular, that may be mankind’s most severe environmental disturbance.

#53 Professor Sir Robert Watson ... Tyndall Centre for Climate Change Research ... Expertise: Ozone depletion, paleoclimatology
There is no question the earth's temperature is warmer than it was 100 years ago. There's no question we're seeing more floods, more droughts, more heatwaves, all of which are totally consistent with the hypothesis of human induced climate change, which points to the fact we humans are changing our environment.

#54 Professor Joanna Haigh ... Imperial College, London ... Expertise: Solar variability, radiative transfer, climate modelling
Carbon dioxide has not been at such a high atmospheric concentration for 3 million years. We understand its greenhouse effect – warming is unequivocal.

#55 Dr. Michael Raupach ... Australian National University ... Expertise: Carbon-climate-human interactions
There is overwhelming evidence that human-induced climate change is already real and will increase. Climate science shows what is needed to limit warming to about 2 degrees Celsius, and restrict impacts on rainfall, extreme events, ecosystems and more: global greenhouse gas emissions have to be cut by around 60% by 2050 with continued decreases after that.

#56 Dr. Peter Stott ... Met Office, UK ... Expertise: Climate monitoring and attribution
The chances that we’ve got it wrong, that the scientific consensus is wrong about this, that there isn’t a major human influence on climate — the chances that that’s the case seems to keep reducing as we get more and more data.

#57 Professor Dennis Hartmann ... University of Washington ... Expertise: Variability in the atmosphere & climate
The amount of long-lived greenhouse gas in the atmosphere is being dramatically increased by humans. The earth is warming unequivocally and we're pretty sure that's due to human production of greenhouse gases.

#58 Professor Nathan Bindoff ... University of Tasmania ... Expertise: Climate change, ocean processes
There are a few aspects that don’t allow us to say with 100% certainty, but what we can say is that we are 95% certain that human activity is the main cause of global warming. Our best estimates actually account for all of the observed change since the 1950’s and that the alternatives, solar variability and natural variations have nothing to contribute over this period.

#59 Professor Andy Pitman ... University of New South Wales ... Expertise: Terrestrial processes in climate modelling
Climate change, resulting from human activities, is occurring all around us. It can be seen in the temperature record, in sea level rise and in the seasonal greening of landscapes. The impacts are measurable in changing frequency of extremes, in impacts on heat waves, and in the nutritional value of some crops. Not accepting the science prevents the planning that minimizes risk and would help build resilience. We are currently choosing to be more vulnerable than we need to be in the future and that is stupid.
private correspondance

#60 Dr. Julienne Stroeve ... NSIDC, Boulder, Colorado ... Expertise: Remote sensing of snow and ice
My views changed as I studied the emerging data. With record low sea-ice extents year after year, it became clear that a significant warming trend was underway.

#61 Professor Andrew Weaver ... University of Victoria, Canada ... Expertise: Climate modelling
We know that the world is warming, we've known that for a long time. We know that much of that warming, in fact the overwhelming majority of that warming, is due to human activity; that is the combustion of fossil fuels and other greenhouse gases going into the atmosphere.

#62 Dr. Chris Forest ... Pennsylvania State University ... Expertise: Climate projections, climate feedbacks
It's very clear from the observations that the climate system has warmed over the past century, and that these results are then consistent with human causes having forced the climate system over the past century.

#63 Pofessor Pramod Aggarwal ... Consultative Group on International Agricultural Research ... Expertise: Crop growth models, climate impacts on crops
Temperature increases are certainly going to be there, they are significant, and at the minimum they will be 1 and a half degrees Celsius by the end of the century irrespective of global change scenarios, but they could go as high as 4 and a half degrees Celsius by the end of this century, all depending on the trajectory of development in future.

#64 Professor Ken Denman ... University of Victoria ... Expertise: Physical oceanographic processes
The issue is not a lack of scientific evidence, the issue is the unwillingness of people and governments to act. It seems to defy logic. But a lot of addictions defy logic. Our society is completely addicted to cheap power from fossil fuels.

#65 Professor Thomas Stocker ... University of Bern ... Expertise: Climate modelling, ice core analysis
Climate change challenges the two primary resources of humans and ecosystems, land and water. In short, it threatens our planet, our only home.

#66 Professor Brian Hoskins ... The Grantham Institute for Climate Change ... Expertise: Atmospheric motion to planetary scales
We are performing a very dangerous experiment with our planet, and I don't want my grandchildren to suffer the consequences of that experiment.

#67 Assoc. Professor Malte Meinshausen ... Potsdam Institute for Climate Impact Research, University of Melbourne ... Expertise: Emission & implications of climate targets
Our habit to produce energy by burning fossil fuels causes global warming. Civil societies and policy makers will have to make a choice about how much climate change will be too much. Currently, the international community regards 2ºC as such a level, which is not safe, but which might prevent many of the more dramatic impacts.

#68 Professor Corinne Le Quéré ... Tyndall Centre for Climate Change Research ... Expertise: Emission scenarios, climate modelling
The human influence on climate change is clear and dominant. The atmosphere and oceans are warming, the snow cover is shrinking, the Arctic sea ice is melting, sea level is rising, the oceans are acidifying, and some extreme events have increased. CO2 emissions from burning fossil fuels need to substantially decrease to limit climate change.

#69 Professor James White ... University of Colorado Boulder ... Expertise: Paleoclimate dynamics, biogeochemistry
We live on a water planet. What that means in practical terms is that it takes decades or more for the earth to heat up, or cool off, as greenhouse gases increase or decrease. So the greenhouse gases that we add, our kids will have to deal with, and they do their kids will have to deal with, and so on. This will continue until one generation breaks the cycle by placing more value on long term benefits for their kids instead of short term profits for themselves.

#70 Professor Scott Denning ... Colorado State University ... Expertise: Measuring CO2 sinks & sources
We expect climate to be warmer in the future than in the past because we know that greenhouse gases absorb and then re-emit thermal radiation. As people around the world burn more and more fossil fuels, concentrations of greenhouse gases increase, so that solar energy accumulates under the extra absorbing gas.

#71 Professor David Archer ... University of Chicago ... Expertise: Global carbon cycle, aqueous chemistry
Each ton of coal that we burn leaves CO2 gas in the atmosphere. The CO2 coming from a quarter of that ton will still be affecting the climate one thousand years from now, at the start of the next millennium.

#72 Professor Richard Somerville ... University of California, San Diego ... Expertise: Global Modeling Theory & Computation
If the world as a whole continues to procrastinate throughout the current decade, allowing emissions to continue to increase year after year, then it will almost certainly have lost the opportunity to limit warming to 2 degrees Celsius. Instead, our children and their descendants, and ultimately all living things, will be faced with the consequences of more severe climate disruption.

#73 Dr. Josh Willis ... Jet Propulsion Laboratory ... Expertise: Oceanography
We can't reverse these changes. If we wreck our climate, we're stuck with it for a thousand years.
private correspondance

#74 Professor Philip Mote ... Oregon State University ... Expertise: Climate impacts on water, sea level rise
Global warming refers to an increase in the planet's average temperature, and there's no question that that's happened over the last 100 years. Over the last 50 years, it's increasingly clear that that warming, the more recent warming, is because of human activities.

#75 Professor John Mitchell ... Met Office, UK ... Expertise: Detection & attribution of climate change
It's very simple, it's simple laws of physics, it's well established laws of physics. More greenhouse gases, more warming.

#76 Professor Donald Wuebbles ... University of Illinois ... Expertise: Modeling of atmospheric physics & chemistry
We know that the climate is changing. It’s not just that the earth is warming, it’s many other aspects going on. Precipitation patterns are changing and other aspects. We have clear evidence that the basis for those changes is because of human activities, and particularly the emissions of carbon dioxide and some other gases and particles that are in the atmosphere that are causing a forcing on the climate system that is driving that change.

#77 Professor James McCarthy ... Harvard University ... Expertise: Primary production in upper ocean
All the professional societies of climatologists, meteorologists, oceanographers that have ever looked at this problem have made very consistent statements that climate is changing, it's changing in unusual ways, and the only way that change can be explained is as a result of human activities.

#78 Dr. Sarah Das ... Woods Hole Oceanographic Institution ... Expertise: Glaciology, paleoclimatology
We understand the physical processes, we know that climate on the planet has always been changing, and we understand that the changes we are experiencing now, a large component of that is caused by human activity.

#79 Professor Mark Cochrane ... Geospatial Sciences Center of Excellence ... Expertise: Fire Ecology, Land Use Interactions
Anthopogenic greenhouse warming is the only scientific theory that accurately explains what is occuring. We’ve had over 100 years of scientists trying to prove this theory wrong, and there is close to unanimous scientific agreement on this as you’re ever going to find, with at least 97% consensus among scientists who actually work on the subject

#80 Dr. Peter Hildebrand ... NASA, Goddard Institute for Space Studies ... Expertise:
I think that the debate is happening around the world. It’s not a debate, though, in the science community. There’s no debate at all there. The scientists know that human influences are creating greenhouse gases and these are warming the earth.

#81 Professor Susan Solomon ... Massachusetts Institute of Technology ... Expertise: Atmospheric chemistry, climate change
As we add carbon dioxide to the atmosphere, we’re creating warming that would last more than a thousand years – even if we suddenly stopped emitting.
private correspondance

#82 Professor Ulrike Lohmann ... ETH Zurich ... Expertise: Atmospheric physics, cloud interactions
The IPCC report states very clearly that humans are the main cause for global warming. There is therefore no longer an excuse to not act and to thereby endanger the lives of future generations.

#83 Dr. John Fasullo ... UCAR Bolder, Colorado ... Expertise: Climate variability
For many global warming means an increase in Earth’s surface temperature. But anthropogenic climate change also entails a warming of oceans, a moistening of the atmosphere, and an increase in sea level. All are the result of the alteration of the natural flow of energy through the climate system by human activities.

#84 Dr. Jim Salinger ... University of Auckland ... Expertise: Climate variability, climate impacts
A third of the permanent snow and ice of New Zealand’s Southern Alps has now disappeared in the last three decades, along with 9000 cubic kilometres of glacier ice from the mountain glaciers of the world. With another 2 to 3°C of warming these glaciers will be about 10% of what we had a century ago - far less than the ice cover over thousands of millenia. Is this the world we want?
private correspondance

#85 Dr. Sylvia Earle ... National Geographic Society Explorer in Residence ... Expertise: Oceanography
An ice-free Arctic Ocean may happen in this century. That's bad news for the polar bears. That's bad news for us too. Excess carbon dioxide is not only driving global warming, it's also changing ocean chemistry, making the sea more acidic. That's bad news for coral reefs and oxygen-producing plankton. Also it's bad news for us.

#86 Professor Myles Allen ... University of Oxford ... Expertise: Influences on climate, extreme weather
Back at the beginning of the Industrial Revolution, we had around 3-4 trillion tonnes, that’s 3-4 thousand billion tonnes of fossil carbon sitting underground waiting to be dug up and burned to power the Industrial Revolution. Over the past 250 years, we’ve dug up and burned about half a trillion tonnes. Over the next 35 years, at the current rate, the way things are going, we’ll burn the next half trillion tonnes and the next half trillion tonnes after that will take us over 2°.

#87 Professor James Byrne ... University of Lethbridge ... Expertise: Climate variability, hydrometeorology
Current reserves of fossil fuels are five times more than we can afford to burn if we want to keep global warming to less than 2°C; and we have to keep global warming below 2°C.

#88 Professor Anders Levermann ... Potsdam University ... Expertise: Sustainable solutions, adaptaion strategies
There are not many human activities whose impact can reasonably be predicted decades, centuries, or even millennia in advance. The fallout from nuclear waste is one; humans’ contribution to global warming through greenhouse-gas emissions from burning fossil fuels, and its impact on rising sea levels, is another.

#89 Professor Wally Broecker ... University of Columbia ... Expertise: Ocean’s role in climate change
One of the main drivers of ice ages was the CO2 content in the air. When the CO2 was lower it got plenty colder. So, as we add CO2 it’s going to get a lot warmer. There can be a question about how big the warming will be, but there’s no doubt in my mind that warming has occurred.

#90 Professor Gifford Miller ... University of Colorado, Boulder ... Expertise: Quaternary stratigraphy, paleoclimatology
The key piece here is just how unprecedented the warming of Arctic Canada is. This study really says the warming we are seeing is outside any kind of known natural variability, and it has to be due to increased greenhouse gases in the atmosphere.

#91 Professor Michael Oppenheimer ... Princeton University ... Expertise: Climate change & its impacts
We know that greenhouse gases trap heat that would otherwise escape into space and that their build-up will inevitably warm Earth. We know that Earth is warmer than it was a century ago and we know that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century.

#92 Professor Richard Pancost ... University of Bristol ... Expertise: Paleoclimate, geomicrobiology
What we understand well is that humans have increased atmospheric CO2 and that has caused and will continue to cause global warming. There are uncertainties in exactly how temperature and sea level will rise. And there is uncertainty regarding its impacts, especially on food and water security. But such uncertainty is a cause for action, not inaction.
private correspondance

#93 Professor Peter Cox ... University of Exeter, UK ... Expertise: Carbon cycle feedbacks, pollutants
Scientists are like cats, we are not herdable, ask any University! We don't like to agree, in fact we are motivated by not agreeing, so how could we possibly get to the point where we can agree? Is it the Intergovernmental Panel of Cat Control? No it's not! Part of the reason we agree is because some of it's obvious. It's been obvious for a long time.

#94 Professor Glen MacDonald ... UCLA ... Expertise: Climate change causes & impacts
The evidence is now overwhelming that by and large the warming we are seeing has an anthropogenic cause.

#95 Dr Katrin Meissner ... University of New South Wales ... Expertise: Abrupt climate events, climate feedbacks
Let's imagine we decide to stop all fossil fuel emissions today, worldwide, forever... the climate will not immediately jump back to where it was before human intervention. The longer we wait, the more warming we will be committed to. We are now setting the course for our immediate future and for generations to come. We are more vulnerable than most of us realise.
private correspondance

#96 Dr Alan Robock ... Rutgers University ... Expertise: Volcanic eruptions, climate impacts
If you ask climate scientists, the ones that publish in the journals, the ones that do the research, the ones that understand the science, more than 97 percent of them agree that humans are the main cause of global warming. And so, by saying that other people who claim to be scientists don't agree, or by having debates between one global warming denier and one climate scientist, it makes it seem like there's a much stronger argument on the side of the deniers.

#97 Dr. Greg Holland ... National Center for Atmospheric Research ... Expertise: Tropical meteorology, severe weather
...the overwhelming consensus is that the globe is warming. The overwhelming consensus is that this is making changes to severe weather and rare events, be it heavy rainfall, droughts, tropical cyclones or whatever.


Trad climber
Lee, NH
Sep 11, 2014 - 07:14am PT
Thanks, Malemute, it's cool seeing those all in one place.
Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan
Sep 11, 2014 - 07:18am PT
Thanks again Malemute, for reframing the engagement.


Sep 11, 2014 - 07:35am PT
Why does Malemute have to put all that copy paste in here?

You already have about 20,000 posts saying humans are the cause of climate change.

This planet is put here because of us.

It didn't just appear out of nowhere.

It was put here for a purpose.

We create the WORLD.

You don't even have to have any graphs or data to "see" the changes caused by
mankind's ruthless selfish attacks against their own self interests due to poor fund of knowledge.

Everything we do has an effect on this world including the climate.

We are not independent in our current lives on this planet from material nature.

When we are disharmonious from material nature then the climate automatically changes.

We are NOT the ultimate controllers.

We only have minute control.

Material Nature operates under stringent laws to keep those in poor fund of knowledge in check ......
Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan
Sep 11, 2014 - 07:37am PT
Why does Malemute have to put all that copy paste in here?

He could go back to shouting 'stupid Americans' like you do Werner.

Instead he is contributing knowledge to an otherwise shitfest. Take him to task for that?

Stupid american!


Sep 11, 2014 - 07:38am PT
Yes we Americans are stupid too ..... :-)
Bob D'A

Trad climber
Taos, NM
Sep 11, 2014 - 07:51am PT
Werner...not everyone agrees on the cause and effects of humans on this planet. It is nice to see the over whelming majority of experts do agree on the major causes of global warming.

Amazing how some on this thread strut their ignorance with such confidence.
Wade Icey

Trad climber
Sep 11, 2014 - 08:08am PT
the ignorant usually hold the highest esteem for their own opinions.

Trad climber
Not FortMental
Sep 11, 2014 - 08:39am PT
Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan

Sep 11, 2014 - 07:37am PT

He could go back to shouting 'stupid Americans' like you do Werner.

Instead he is contributing knowledge to an otherwise shitfest. Take him to task for that?

Stupid american!

He could've just posted:


Ice climber
great white north

Sep 11, 2014 - 06:35am PT
The 97 Climate Scientists from

Props to Malemute for going to trouble of composing that post.

It just seems like he did a lot of work, when a explanation and a link would've accomplished the same thing.
The Chief

Laughing at all you angry blinded asshat Sheep
Sep 11, 2014 - 08:49am PT
It is nice to see the over whelming majority of experts do agree on the major causes of global warming.

Amazing how some on this thread strut their ignorance with such confidence.

That is pretty much in line with what Pope Gregory ix stated regarding the RCC's doctrine under his breath. Then he outright mandated regarding anyone such as the individual below that played any part in this dudes club of denialism, was to be totally discredited, ex-communicated and eventually put to death for being a heretic/non-believer/non-conformist amongst the over whelming consensus of the time.

Amazing how "Man's" dogmatic history truly repeats itself....

Peter of Bruys (also known as Pierre De Bruys or Peter de Bruis; fl. 1117 – c.1131) was a popular French religious teacher, who is called a heresiarch (leader of a heretical movement) by the Roman Catholic Church because he criticized infant baptism, opposed the erecting of churches and the veneration of crosses, opposed the doctrine of transubstantiation, and denied the efficacy of prayers for the dead An angry mob killed him in or around the year 1131.

BTW.... REMEMBER 9/11!
Wade Icey

Trad climber
Sep 11, 2014 - 09:07am PT
that's pretty cool chief.

Social climber
So Cal
Sep 11, 2014 - 09:22am PT
An early September winter storm in the Black Hills has dumped more than 6 inches of snow in the area, while Rapid City received its earliest snowfall in more than 120 years.

SF bay area
Sep 11, 2014 - 09:23am PT
Thanks for the weather report, TGT.
Bob D'A

Trad climber
Taos, NM
Sep 11, 2014 - 10:18am PT
What is your point TGT???

Credit: Bob D'A
The Chief

Laughing at all you angry blinded asshat Sheep
Sep 11, 2014 - 11:44am PT
This too shall pass, as it has so many times in the past. We will get over it. Just like we did back in the 30's when there was no such thing as AGW. Just good old climate and droughts and tornado's and hurricanes and....

And your point is... BOBda???

Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan
Sep 11, 2014 - 12:02pm PT
LOL the human was the ONLY dust bowl component.

Morons tried to farm the desert without irrigation! Dumbass beat farmers (on stolen land no less)

Such a natural disaster, lol.

Yeah boy howdy momma nature!

The dust bowl was a direct result of human activity. As was the despoiling of Mesopotamia.


Trad climber
Not FortMental
Sep 11, 2014 - 12:15pm PT
Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan

Sep 11, 2014 - 12:02pm PT
LOL the human was the ONLY dust bowl component.

What about the droughts?
Dingus Milktoast

Gym climber
Maestro, Ecosystem Ministry, Fatcrackistan
Sep 11, 2014 - 12:16pm PT
If a tree falls in the forest and there are no humans around, who gives a sh#t?

Or reworded, 'drought' is a human condition. If you make a farm in the desert dependent on rainfall, don't be blaming nature when the rain doesn't fall. You'd be a complete dumbass if you did that.

Read up on what those west Texas dumbasses have done to their aquifer. WE Californians are replicating that experiment in the Central Valley.


Trad climber
Not FortMental
Sep 11, 2014 - 12:24pm PT
Yikes Dingus. Didn't mean to upset your apple cart.

A drought is a naturally occurring event. A feature of the climate.

Bob D'A

Trad climber
Taos, NM
Sep 11, 2014 - 12:24pm PT
"This too shall pass, as it has so many times in the past. We will get over it."


Sketch...they used European farming methods in a dry desert like environment. It didn't work out too well for them...but they got over it. LOL
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