2007 AGU Fall Meeting, December 10-14,San Francisco, CA
The NASA NEESPI Tools Use in Studies of Environmental Changes in Northern Eurasia
1Suhung Shen, 2Gregory Leptoukh, 3Ivan Csiszar, 3Tatiana Loboda, 3Peter Romanov, 2Irina Gerasimov
1GMU / NASA GSFC, 2NASA GSFC, 3University of Maryland, College Park, Maryland, USA
The NASA NEESPI portal is a multi-sensor, online, easy access data archive and distribution system to provide advanced data management capabilities in support of the Northern Eurasia Earth Science Partnership Initiative (NEESPI) scientific objectives.
Its tools include data analysis and visualization, and other techniques for better science data usage in assessment of the state and dynamics of terrestrial ecosystems in Northern Eurasia and their interactions with the Earth's Climate system. Several cases are investigated using the NEESPI online visualization and analysis system Giovanni that demonstrate ability to multi-sensor data exploration. The analysis of fire occurrence in western Kazakhstan during 2001-2002 has indicated a potential relationship between precipitation, NDVI, and fire occurrence. Inter-annual change in precipitation occurrence is shown to drive the vegetation response observed through NDVI. A greater amount of precipitation during May of 2002 prompted an increase in plant productivity and the corresponding NDVI signal. The enhanced plant productivity potentially leads to a greater accumulation of fuels during the senescence period between June and September. Fuel accumulation results in increased fire occurrence (observed through Fire Counts) and higher fire intensity (observed through the Fire Radiative Power). Other sample studies will be presented in this paper are ice frequency changes over Sea of Okhotsk and other northern seas, and potential drought risk assessment in Mongolia and Central Asia republics using remotely sensed soil moisture and rainfall rate.
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