Talk:Climate variability and change

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Effects of CO2

Added information that was in this article section.

The Environmental Protection Agency (EPA) of the United States, determined that carbon dioxide, and five other greenhouse gases, "endanger public health and welfare" of the American people. These gases, they said, contribute to climate change, which is causing more heat waves, droughts and flooding, and is threatening food and water supplies. http://yosemite.epa.gov/opa/admpress.nsf/0/0EF7DF675805295D8525759B00566924

Solar stuff

The 11-year sunspot cycle produces only a small change in temperature near Earth's surface (on the order of a tenth of a degree) but has a greater influence in the atmosphere's upper layers.[12] This sounds dodgy to me. Its not in the abstract. Is it in the body? If true, it should be off in SV too William M. Connolley (talk) 21:38, 24 September 2009 (UTC)

Yeah, it's in the body. I quote some stuff here - want a copy of the article? It is probably better if I just send you a copy of the article. The relevant portions of the conclusions are:

Throughout the low latitudes (30°S–30°N) the stratosphere (16–55 km) warms in response to the 11-yr solar cycle in the ERA-40 data (Fig. 2 ). A large region of highly statistically significant positive response is found over the equator between about 35–50 km, peaking at about 43 km with an amplitude of 1.75 K. This warming is present in all seasons and is therefore likely to be a direct radiative response to solar irradiance and UV absorption by ozone in this region during solar maxima.

[2 paragraphs down] A negative temperature response to the solar cycle is found at high latitudes of both hemispheres. ... The anomalous meridional temperature gradient gives rise to a strong solar-induced zonal wind response in the upper stratosphere/lower mesosphere of both hemispheres (Fig. 3 ). These midlatitude features are predominantly a wintertime phenomenon associated with the strength of the polar night jet (Fig. 4 ). They are therefore likely to be due to indirect (dynamical) effects. Analysis of monthly responses suggests that it is the timing of the stratospheric winter warmings that is influenced by increases in solar cycle activity (Gray et al. 2004).

I will change "upper layers" to stratosphere for the moment. Awickert (talk) 17:30, 25 September 2009 (UTC)

Climate Change News

I have been reading some useful climate change weekly news on http://www.climatechangebusiness.com/climate_change_news

Is the Climate Change News link worthy of inclusion?

Its a decent link on the subject.

Best

Mike —Preceding unsigned comment added by Zapytania (talk • contribs) 05:00, 16 October 2009 (UTC)

Dead Link

There's a dead link under the 'See also' section. 'Cretaceous Thermal Maximum'. —Preceding unsigned comment added by Mass09 (talk • contribs) 09:23, 21 October 2009 (UTC)

Removed, thanks. You should soon be able to edit semi-protected pages yourself. --Stephan Schulz (talk) 09:29, 21 October 2009 (UTC)

Add "see Category:Climate crisis in addition to Global warming" as they are merge-able topics

Add "see Category:Climate crisis in addition to Global warming" as they are merge-able topics. 99.155.156.1 (talk) 04:50, 22 October 2009 (UTC)