Inflection Points and Polar Bears - PowerPoint Presentation

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Inflection Points and Polar Bears - PPT Presentation

Jason Hamilton Thomas J Pfaff Glacier Pair Images httpwwwwindowsucareduteacherresourcesglacierthennowpdf A Look at Global Temperature Tx00005x 2 000527x57137 F Tx0001x000527 Fyear ID: 180847

deg temperature increase msk temperature deg msk increase global ice march thaw average 0528 freeze period timing cares 2008

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Slide1

Inflection Points and Polar Bears

Jason Hamilton

Thomas J. PfaffSlide2
Slide3

Glacier Pair Images

http://www.windows.ucar.edu/teacher_resources/glacier_then_now.pdfSlide4

A Look at Global Temperature

T(x)=0.0005x

-0.00527x+57.137 F

T’(x)=0.001x-0.00527 F/year

x years after 1950

T(58)= 58.51 F and T’(58)=0.0528 F/yearIn 2008 the average global temperature was 58.51 deg F and increasing at a rate of 0.0528 deg F per year. - Now Ask a Question About This-Slide5

National Academies Report: Climate Change

The rising temperature observed since 1978 are particularly noteworthy because the

rate of increase

is so high and because, during the same period, the energy reaching the Earth from the Sun had been measured precisely enough to conclude that Earth’s warming was not due to changes in the Sun.

-March 2006Slide6

Temperature Predictions

T(100)=61.60 F and T(150)=67.61 F

The model predicts that in 2050 the average temperature will be 61.6 deg F, and in 2100 it will be 67.61 deg F, an increase of 3.49 and 9.48 deg F, respectively, since 2000.

–Now Ask a Question About This-Slide7

More Temperature Predictions

Using T’(58)=.0528 F/year

If global temperatures continue to increase at current rates, then by 2050 there will be an increase of 2.61 deg F and by 2100 there will be an increase of 5.24 deg F since 2000. The average global temperature in those years will be 60.73 and 63.37, respectively. Slide8
Slide9

-National Academies Report on Climate Change

(March 2006)Slide10
Slide11

Summary of Sea Ice

1980

Max: 16.13 msk, x=2.59

Min: 7.86 msk, x=8.79

Inf: -2.20 msk/month, x=6.44

Melt Period: 6.20 months

2008Max: 15.11 msk, x=2.26Min: 5.40 msk, x=8.80Inf: -2.84 msk/month, x=6.77Melt Period: 6.54 monthsSlide12

Who Cares?

Heat content of atmosphere & hydrosphere

Air Temperature &