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Monitoring temperature changes in a hypersaline lake using MODIS-derived water temperatures (the case of Urmia Lake, Iran)

Sima, S ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. Lake surface temperature is an important indicator of the lake state and a driver of regional weather and climate near large lakes. The objective of this study is to use thermal imagery from the MODIS on board the Earth Observing System Terra and Aqua platforms to assess the spatial and temporal variations in Urmia lake temperature. Urmia Lake, located in northwestern Iran is one of the largest permanent hypersaline lakes in the world. The surface temperature of Urmia Lake is examined between 2008 and 2009, as dry years. MODIS-derived lake SWT then was calibrated with monthly observations. MODIS-derived lake SWT exhibits a cool bias (-0.72°C) relative to in situ temperature observations in 2009.According to the results the diurnal SWT range is as large as 8°C while the annual cycle of UL SWT ranges from -3.2°C in January to 26.6°C in July 2008 and from 1.8°C in January to 26.9°C in July 2009
  5. Keywords:
  6. Annual cycle ; Earth observing systems ; Hypersaline lakes ; In-situ temperature ; Lake States ; Lake surface temperature ; Large lakes ; Regional weather ; Spatial and temporal variation ; Surface temperatures ; Temperature changes ; Thermal imagery ; Water temperatures ; Atmospheric temperature ; Hydraulics ; Radiometers ; Surface properties ; Lakes
  7. Source: 6th International Symposium on Environmental Hydraulics, Athens, 23 June 2010 through 25 June 2010 ; Volume 2 , 2010 , Pages 881-886 ; 9780415595469 (ISBN)