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SJSU METR 280 - Use of Satellite Observation

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Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Menglin JinMenglin JinDepartment of Meteorology, San JoDepartment of Meteorology, San Jośśe State University e State University The Use of Satellite ObservationThe Use of Satellite ObservationWays to use1. Understand physical processesExample. Land Surface Temperature2. Validate Climate Model OutputsProf. Menglin Jin (1-α)Sd +LWd-εσTskin4 +SH+LE + G= 0Examine Urbanization EffectLand Surface Energy Budget:(1-α)Sd +LWd-εσTskin4 +SH+LE + G= 0Urbanization Modifies Surface Energy Budget:Urban add new physical processesMODIS image for Chen Du, China (source: NASA)An application: Urbanization - the satellite view50kmUrban heat island effectDaytimeNighttime50km50kmMODIS(Jin, Dickinson et al. 2005, J. of Climate)Urbanization changes surface albedo (MODIS)(Jin, Dickinson, and Zhang 2005, J. of Climate)Urbanization changes surface emissivity (MODIS)(Jin, Dickinson, et al. 2005)MODIS Observed Global urban heat island effect1. At the edges ice is melt and Tskin can be higher than 287K. simulation is colder than observed in JulyMODIS Obs. JulyCCSM SimulationLand Surface Skin Temperature2. Over the central peak parts, simulation is warmer than observations2. validation on NCAR modelWhere does GFS overestimate Tskin? NighttimeUp to 5 degree higher in GFS than in MODIS along coast and high elevated areaGFS Tskin Oct 2007 (10:30 pm) MODIS Tskin Oct 2007 (10:30 pm)AntarcticaTskin study for a region:Spatial pattern of TskinSpatial variation of Tskin follows elevation


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