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Satellite Observations of Climate and Vegetation Water Use over the Sierra Nevada Eric Waller Department of Environmental Science, Policy, and Management.

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Presentation on theme: "Satellite Observations of Climate and Vegetation Water Use over the Sierra Nevada Eric Waller Department of Environmental Science, Policy, and Management."— Presentation transcript:

1 Satellite Observations of Climate and Vegetation Water Use over the Sierra Nevada Eric Waller Department of Environmental Science, Policy, and Management University of California, Berkeley SSCZO Annual Meeting Fresno, CA 8/20/13

2 Giant Sequoia Groves Lake Tahoe Yosemite N.P. Los Angeles San Francisco Kings Canyon N.P. Sequoia N.P. MODIS Terra, 7-2-1 July 14, 2011

3 Providence Creek Sites Giant Sequoia Groves April Cloud Frequency: Custom Classification of MODIS Aqua Data (2003-2011)

4 Is atmosphere frequently humid, with clouds just a visible manifestation on days of lower temperatures? Exogenous vs. endogenous moisture? Questions

5 Other MODIS data indicate: Low daytime thermal land surface temperature (LST) AND Low day vs. night LST contrast (See Figure on next slide)  Particularly in relation to air temperature and vegetation index (e.g., NDVI), respectively  Indicative of particularly well-watered conditions Atmosphere directly above regularly has high relative humidity

6 MODIS Aqua Land Surface Temperature Contrast (Day-Night) 6/17/2013 Providence Creek Sites

7 Giant Sequoia Groves April Cloud Frequency: Custom Classification of MODIS Aqua Data (2003-2011)

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