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Inter-comparison Of Remote Sensing Sea Surface Temperature Derived From Multi-sensors And The Application Of SSTs In Typhoon

Posted on:2008-08-30Degree:MasterType:Thesis
Country:ChinaCandidate:F Q SunFull Text:PDF
GTID:2120360278454318Subject:Physical oceanography
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Argo data from Jul. 2002 to Dec. 2005 were selected to validate the AVHRR/MODIS/TMI ascending Sea Surface Temperature(SST) at daily scale in region of [10-35°N,110-165°E]. The differences between three remote SST and Argo temperature at 5~6 m depth were -0.2℃~0.2℃for bias and 0.6℃~0.9℃for rms, which were consistent with the SST retrieval accuracy 0.6℃~0.7℃on global scale. The differences varied in seasons, lower in winter but higher in summer.AVHRR, MODIS, TMI SST were compared in [111-130°E,12-32°N] of China sea and several districts of special geography were chosen, viz. Taiwan Strait, east China sea coast shelf, eastern Kuroshio, basin of south China sea(SCS), and three districts in pacific at the same latitude to the latter three. It indicated that the offshore consistency of AVHRR/MODIS/TMI SST is better than nearshore, and better in summer than in winter. The bias is in±0.2℃and rms is less than 0.4℃offshore.Further, 36 cases of SCS lower SST response to typhoon detected by AVHRR/MODIS/TMI were compared, and with some other remote data ecological response to typhoon Lingling was researched. It indicted that: (1) infrared were obstructed by bad weather, but TMI SST presented well the lower SST response.(2) From Nov.9 to Nov. 12 in 2001, typhoon Lingling strengthened the pre-exist gyre induced by northeast monsoon in SCS. Mix-layer was about deepen from 30m to 50m, and influenced depth was deeper than 150 m. Typhoon-induced strong pumping and entrainment resulted in Chla enhancement both from upward entrainment of phytoplankton and new nutrient injection from deeper water. The effect of CDOM and detritus on Chla increasement was first time removed, and Chla increase was account for 79% of new production, and daily rate of carbon fixation increased from 400 mgC/m~2/d to 1473 mgC/m~2/d. Typhoon does have a remarkable effect on ocean new production and it needs more complete data for further research.
Keywords/Search Tags:Sea Surface Temperature(SST), AVHRR, MODIS, TMI, Argo, South China Sea(SCS), Typhoon
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