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You are here: Home / Archives for Climate Science / Arctic and Antarctic

Arctic and Antarctic

Senator Inhofe on Climate Change

10 Jan 2005 by group

by Michael Mann, Stefan Rahmstorf, Gavin Schmidt, Eric Steig, and William Connolley

Senator James Inhofe (R) of Oklahoma recently provided us with an update of his views on the issue of climate change in a speech given on the opening senate session, January 4, 2005. His speech opened with the statement:

As I said on the Senate floor on July 28, 2003, “much of the debate over global warming is predicated on fear, rather than science.” I called the threat of catastrophic global warming the “greatest hoax ever perpetrated on the American people,” a statement that, to put it mildly, was not viewed kindly by environmental extremists and their elitist organizations.

Cutting through much of his polemic, Inhofe’s speech contains three lines of scientific argument which, according to him, provide “compelling new scientific evidence” that anthropogenic global warming is not threatening. We here submit his statements to scrutiny.
[Read more…] about Senator Inhofe on Climate Change

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science, Greenhouse gases, Paleoclimate

Michael Crichton’s State of Confusion

13 Dec 2004 by Gavin

Translations: (Français)

In a departure from normal practice on this site, this post is a commentary on a piece of out-and-out fiction (unlike most of the other posts which deal with a more subtle kind). Michael Crichton’s new novel “State of Fear” is about a self-important NGO hyping the science of the global warming to further the ends of evil eco-terrorists. The inevitable conclusion of the book is that global warming is a non-problem. A lesson for our times maybe? Unfortunately, I think not.

[Read more…] about Michael Crichton’s State of Confusion

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science, Greenhouse gases, Instrumental Record, Reviews

The Arctic Climate Impact Assessment

5 Dec 2004 by Stefan

In early November 2004 the results of the Arctic Climate Impact Assessment (ACIA) were published, a uniquely detailed regional study compiled by 300 scientists over 3 years. The study describes the ongoing climate change in the Arctic and its consequences: rising temperatures, loss of sea ice, unprecedented melting of the Greenland ice sheet, and many impacts on ecosystems, animals and people. The ACIA is the first comprehensively researched, fully referenced, and independently reviewed evaluation of arctic climate change and its impacts for the region and for the world.

Sadly, in recent years we have become accustomed to a ritual in which the publication of each new result on anthropogenic climate change is greeted by a flurry of activity from industry-funded lobby groups, think tanks and PR professionals, who try to discredit the science and confuse the public about global warming.

[Read more…] about The Arctic Climate Impact Assessment

Filed Under: Arctic and Antarctic, Climate Science, Paleoclimate

The Arctic Climate Impact Assessment II

5 Dec 2004 by Gavin

Another apparent ‘refutation’ appears in a CNS news story (a right-wing internet news service). The piece is predominantly an interview with Pat Michaels and other less prominent skeptics. We take their scientific points one at a time:

[Read more…] about The Arctic Climate Impact Assessment II

Filed Under: Arctic and Antarctic, Climate Science

The Arctic Climate Impact Assessment III

5 Dec 2004 by Gavin

Does the ACIA overstate the problem of ozone depletion? The overview report states that the “stratospheric ozone layer over the Arctic is not expected to improve significantly for at least a few decades”. This is partly because CFC concentrations (that enhance stratospheric ozone destruction) are only expected to decrease slowly as a function of restrictions imposed by the Montreal Protocol and subsequent amendments. Another factor is the fact that stratospheric temperatures are generally cooling as greenhouse gases increase (see MSU Temperature Record, also Why does the stratosphere cool when the troposphere warms?). Due to the temperature dependence on the rates of chemical reactions involving ozone, cooler temperatures also lead to more ozone destruction. Stratospheric temperatures, particularly near the pole are also significantly influenced by dynamical changes, and in particular, the strength of the [Read more…] about The Arctic Climate Impact Assessment III

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science

Antarctic cooling, global warming?

3 Dec 2004 by Gavin

Translations: (Français)

by Eric Steig and Gavin Schmidt
Long term temperature data from the Southern Hemisphere are hard to find, and by the time you get to the Antarctic continent, the data are extremely sparse. Nonetheless, some patterns do emerge from the limited data available. The Antarctic Peninsula, site of the now-defunct Larsen-B ice shelf, has warmed substantially. On the other hand, the few stations on the continent and in the interior appear to have cooled slightly (Doran et al, 2002; GISTEMP). At first glance this seems to contradict the idea of “global” warming, but one needs to be careful before jumping to this conclusion.

[Read more…] about Antarctic cooling, global warming?

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science, Greenhouse gases

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