13-Water

13-Water - 1 ESM 266: Water ESM 266: Water Jeff Dozier...

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Unformatted text preview: 1 ESM 266: Water ESM 266: Water Jeff Dozier Revised schedule Revised schedule May 19 th (today): Water May 21 st : Cryosphere (can be either general or specific to snow & hydrology) May 28 th : Atmospheric radiation, both sounding and effects on remote sensing June 2 nd , 3 rd , 4 th : Student presentations 3 Earth, the water planet Earth, the water planet (approx. 1.4 x 10 (approx. 1.4 x 10 9 9 km km 3 3 , , 74% of surface) 74% of surface) Oceans 97.2% Ice 2.0 Groundwater - deep (750-4000m) 0.4 Groundwater shallow (<750m) 0.3 Lakes 0.01 Soil 0.005 Atmosphere 0.001 Rivers 0.0001 Biosphere 0.00004 Read: Black, P.E. On the critical nature of useless resources; Water Resources Bulletin (1995) Synoptic view from remote sensing Synoptic view from remote sensing Earths gravity anomaly Geostationary, hemispheric coverage Ground-based observations since 1957 Antarctic satellite coverage New Pictures Emerge New Pictures Emerge Stommel 1965: Multiple current hypothesis 1 st satellite 1970s: Single current Internal tide information 1975 Internal tides from altimetry Components of reflectance from water Components of reflectance from water Total radiance, ( L t ) recorded by a remote sensing system over water is a function of the electromagnetic energy received from: L p = atmospheric path radiance L s = free-surface layer reflectance L v = subsurface volumetric reflectance L b = bottom reflectance Absorption Absorption and and scattering in scattering in pure water pure water Examples: dark in NIR, sunglint Examples: dark in NIR, sunglint Black and white infrared photograph of water bodies in Florida Black and white infrared photograph with sunglint Water penetration Water penetration SPOT Band 1 (0.5 - 0.59 m) green SPOT Band 2 (0.61 - 0.68 m) red SPOT Band 3 (0.79 - 0.89 m) NIR 10 Spectral response of water Spectral response of water Inorganic and organic suspensions Particles range from fine clay (3-4mm), to silt (5-40 mm), to fine-grain sand (40-130mm), and coarse grain sand (131 - 1250 mm) Concentrated in the inland and nearshore water bodies Clear, deep ocean (Case 1 water) far from shore rarely contains suspended minerals greater than 1mm in diameter Plankton Chlorophyll a is a reasonable surrogate Dissolved organic matter Related to phytoplankton production Gelbstoff (yellow stuff) Field measurements...
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This note was uploaded on 08/06/2008 for the course ESM 266 taught by Professor Dozier during the Spring '08 term at UCSB.

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13-Water - 1 ESM 266: Water ESM 266: Water Jeff Dozier...

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