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Temperature (1880- 2005)

http://data.giss.nasa.gov/gistemp/graphs/

Year

Temperature Difference From Normal (°C)

5-year Running Average

Annual Average

Preponderance of Evidence Resource Card 1

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Muir Glacier, Alaska

NSIDC/WDC for Glaciology, Boulder, compiler. 2002, updated 2006. Online glacier photograph database. Boulder, CO: National Snow and Ice Data Center.

August 1941

August 2004

Shrinking Glaciers

Preponderance of Evidence Resource Card 2

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Source: Westerling et al. 2006

Western US area burned

Increasing Wildfire Risk

Preponderance of Evidence Resource Card 3

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Keeling Curve - CO2 Concentration

Preponderance of Evidence Resource Card 4

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Ice Core Records

Source: Hansen, Clim.

Change, 68, 269, 2005.

Time (years)

CH4 (ppb) CO2 (ppm)

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Preponderance of Evidence Resource Card 5

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Projected Changes in CA Summer Temperature

UCS

UCS

Preponderance of Evidence Resource Card 6

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2004

>9,500 ft

1900

>7,800 ft

Pika

Species Shifting

Species that are sensitive to temperature conditions can only move up the mountainside as conditions get too warm for them lower down.

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In the Sierras, Pika were seen at 7,800 feet and above in 1900. By 2004, they were not seen below 9,500 feet. This trend is expected to continue.

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The mountains rise as high as 12,000 feet, but the rocky hillsides where Pika live do not reach that high.

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Preponderance of Evidence Resource Card 7

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Diminishing Sierra Snowpack

Percentage Remaining, Relative to 1961-1990

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UCS

Preponderance of Evidence Resource Card 8

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