13-Water

13-Water - 5/19/2008 ESM 266: Water 1 ESM 266: ESM 266:...

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Unformatted text preview: 5/19/2008 ESM 266: Water 1 ESM 266: ESM 266: Water Water 1 Jeff Dozier Earth, the water planet Earth, the water planet (approx (approx. 1.4 x 10 . 1.4 x 10 9 km km 3 , 74% of surface) , 74% of surface) Oceans 97.2% Ice 2.0 Groundwater - deep (750-4000m) 0.4 Groundwater shallow (<750m 0 3 2 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 anomal Geostationary hemispheric coverage Earth s gravity anomaly Geostationary, hemispheric coverage Ground-based observations since 1957 Antarctic satellite coverage New Pictures Emerge New Pictures Emerge Stomme 1965: Multiple current hypothesi 1 st satellite 1970s: Single current Stommel 1965: Multiple current hypothesis 1 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 L b = bottom reflectance 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 5/19/2008 ESM 266: Water 2 Examples: dark in NIR, sunglint Examples: dark in NIR, sunglint Florida Black and white infrared photograph of water bodies in Florida Black and white infrared photograph with sunglint Water penetration Water penetration green SPOT Band 1 (0.5 - 0.59 m) green red SPOT Band 2 (0.61 - 0.68 m) red NIR SPOT Band 3 (0.79 - 0.89 m) NIR 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 9 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 Field measurements clay 400 450 00 55 600 6 00 750 800 850 90 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Percent Reflectance 50 100 150 200 250 clear water g/l Clayey soil 400 450 00 55 600 6 00 750 800 850 90 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Percent Reflectance 50 100 150 200 250 clear water 300...
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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 - 5/19/2008 ESM 266: Water 1 ESM 266: ESM 266:...

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