December, 2008 SWOT D. Alsdorf Hydrology AGU Townhall 2008 Hydrology Slides funded by: CNES, JPL, NASA, and OSU’s Climate, Water, & Carbon Program.

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Presentation transcript:

December, 2008 SWOT D. Alsdorf Hydrology AGU Townhall 2008 Hydrology Slides funded by: CNES, JPL, NASA, and OSU’s Climate, Water, & Carbon Program

Photo: Larry Smith ~30M Lakes > 1 hectare

Photos: K. Frey, B. Kiel, L. Mertes Downing et al., 2006 Siberia Amazon Ohio

SWOT capability to observe water height Ohio River SRTM Water elevation measurements Courtesy: Michael Durand, OSU In Situ observations from Carlston, 1969; originally by Army Corps of Engineers estimated SWOT

SWOT capability to estimate discharge Courtesy: Elizabeth Clark, UW 1)Expected SWOT height observation accuracy 2)Temporal sampling errors 3)River width Ohio River accuracy estimate based on:

Courtesy: Hyongki Lee, OSU Results from Peace Athabasca Delta lakes, Canada Height errors and areal errors vary with lake area Height errors dominate SWOT ability to observe storage change

SWOT capability to measure global storage change Analysis based on global lake frequency-area distribution by Downing et al., 2006 Courtesy: Sylvain Biancamaria, CNES 10 km x 10 km 1 km x 1 km 250 m x 250 m 25%