Estimation of Net Radiation Flux of Antarctic Ice Sheet in East Dronning Maud Land, Antarctica, During Clear Sky Days Using Remote Sensing and Meteorological Data

Autor: Dhiraj Kumar Singh, H. S. Gusain, V. D. Mishra, Manju Arora
Rok vydání: 2018
Předmět:
Zdroj: Remote Sensing in Earth Systems Sciences. 1:89-99
ISSN: 2520-8209
2520-8195
Popis: In the present paper, incoming shortwave radiation flux, net shortwave radiation flux, net longwave radiation flux, and net radiation flux have been estimated at 1-km spatial scale for the ice sheet in East Dronning Maud Land, Antarctica. Terra-MODIS (Moderate Resolution Imaging Spectroradiometer) products (i.e., land and atmospheric data products) have been used to estimate net radiation flux during few clear sky days of the years 2007, 2008, 2009, and 2010. Estimated surface energy fluxes using MODIS products have been evaluated using in situ recorded values of energy fluxes. In situ data of the surface energy fluxes and meteorological parameters have been collected using automatic weather stations (AWS) on ice sheet at two locations near the Indian Research Station “Maitri.” Net radiation flux has been estimated for the study area from net shortwave radiation flux and net longwave radiation flux maps. Bias, correlation, and root mean square error (RMSE) between AWS-recorded and MODIS-derived radiation fluxes have been observed as − 23 W m−2, 0.91 and 61 W m−2 for net shortwave radiation flux and − 21.3 W m−2, 0.93 and 64 W m−2 for net radiation flux, respectively. The study highlights the validation of some of the MODIS products and MODIS-derived energy fluxes in Antarctica. Spatial and temporal variations of radiative energy fluxes have also been investigated in the study area.
Databáze: OpenAIRE
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