Quote:
Originally Posted by bdlangton
Hello all. I know there probably isn't an exact percentage that anyone can give me, but I'm curious for an approximation on what percentage of climatologists believe the following:
1. Man is contributing significantly to climate change.
2. Something must be done immediately to save the earth.
I'm just curious if it is more like 99.9%, 99%, 90% or whatever.
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100% of the Meteorological Organisations that I checked seem to agree with those:
World Meteorological Organization,
Statement at the Twelfth Session of the Conference
of the Parties to the United Nations Framework
Convention on Climate Change
More than a decade ago, on 21 March 1994, the Convention entered into force and the Parties committed themselves to the stabilization of carbon dioxide concentrations, at a level that would prevent dangerous anthropogenic interference with the climate system. Since then, scientific assessments have increasingly reaffirmed that human activities are indeed changing the natural composition of the atmosphere, in particular through the burning of fossil fuels for energy production and transportation. Comparison of past CO2 concentrations, retrieved from air bubbles in glacial ice cores, with the current measurements of the chemical composition of the atmosphere made through WMO’s Global Atmospheric Watch (GAW), shows beyond doubt that the present atmospheric concentration of CO2 was never exceeded over the past 420,000 years. Additionally, it shows that above one half of this increase has occurred since 1950.
...
The impacts of climate variability and change on human and natural systems pose numerous
challenges to sustainable development.
American Meteorological Society,
Climate Change Research: Issues for the Atmospheric and Related Sciences
There is now clear evidence that the mean annual temperature at the Earth's surface, averaged over the entire globe, has been increasing in the past 200 years. There is also clear evidence that the abundance of greenhouse gases in the atmosphere has increased over the same period.
...
Because human activities are contributing to climate change, we have a collective responsibility to develop and undertake carefully considered response actions.
...
Royal Meteorological Society's
statement on the Inter-Governmental Panel on Climate Change’s Fourth Assessment Report
The Fourth Assessment Report (AR4) of the Inter-Governmental Panel on Climate Change (IPCC) is unequivocal in its conclusion that climate change is happening and that humans are contributing significantly to these changes. The evidence, from not just one source but a number of different measurements, is now far greater and the tools we have to model climate change contain much more of our scientific knowledge within them. The world’s best climate scientists are telling us its time to do something about it.
Carbon Dioxide is such an important greenhouse gas because there is an increasing amount of it in the atmosphere from the burning of fossil fuels and it stays in the atmosphere for such a long time; a hundred years or so. The changes were are seeing now in our climate are the result of emissions since industrialisation and we have already set in motion the next 50 years of global warming – what we do from now on will determine how worse it will get.
The Australian Meteorological and Oceanographic Society,
Statement on Climate Change
Our climate has changed substantially
Global climate change and global warming are real and observable. Since the start of the 20th century, the global-mean surface temperature of the Earth has increased by around 0.6°C, and the last decade (1996-2005) was the warmest since at least the mid-19th century, when widespread observations first became available.
...
Increasing temperatures have been observed both over land and in the oceans, in rural areas and cities, at the surface and in the lower atmosphere by satellites and radiosondes[1]. This warming has been accompanied by a decrease in the number of frosts, a rapid contraction of almost all alpine glaciers, a reduction in global sea-ice, a reduction in global snow cover (especially in spring), and a rise in sea-level.
The greenhouse effect is a natural and well-understood phenomenon
...
Most of the observed warming is highly likely due to human activity
It is highly likely that those human activities that have increased the concentration of greenhouse gases in the atmosphere have been largely responsible for the observed warming since 1950. The warming associated with increases in greenhouse gases originating from human activity is called the enhanced greenhouse effect. ...
Percentage of climatologists
backs up alot of what I've been hearing from people trying to get projects going that are prefering to concentrate on other reasons (such as increasing fuel proces) as justifications for the measures they suggest.
Linear Mode
