The Science Behind Climate

Change

William H. Schlesinger, President22 October 2011

Burns et al. 2007. Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA. J. Hydrology 336:155-170.

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1945 1955 1965 1975 1985 1995 2005

Year

Annu

al M

ean

Tem

pera

ture

(deg

C)

Annual mean water temperature at Poughkeepsie

1880 1900 1920 1940 1960 1980 200020

40

60

80

100

120

140

160

180

f(x) = − 0.595828675570215 x + 1267.49649310905R² = 0.437836643459646

Tree Swallow

Series1

Linear (Series1)

Year

Julia

n Da

y

02,0004,0006,0008,00010,00012,000-420-400-380-360-340

Mean Temperature (∆D)

Years Before Present

02,0004,0006,0008,00010,00012,000200250300350400

CO2 (ppmv)

Years Before Present

Milly et al., 2005

© Chris Bowser, NYS DEC Hudson River Estuary Program

Rondout Creek, Kingston, NYPhoto : Chris Bowser, HREP

Burns et al. 2007. Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA. J. Hydrology 336:155-170.

www.caryinstitute.org

198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920100

5

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40

Number of days minimum temperature less than 0 degrees F