Evaluation of ASCAT-Based Daily Gridded Winds in the Tropical Indian Ocean*
Evaluation of ASCAT-Based Daily Gridded Winds in the Tropical Indian Ocean*
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DOI：
10.1175/jtech-d-12-00227.1
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发表时间：
2013-07
影响因子：
2.2
通讯作者：
S. Sivareddy;M. Ravichandran;M. Girishkumar
中科院分区：
文献类型：
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作者：
S. Sivareddy;M. Ravichandran;M. Girishkumar
AbstractThe quality of daily gridded Advanced Scatterometer (ASCAT; DASCAT) blended winds is examined in the tropical Indian Ocean using 3-day running mean gridded Quick Scatterometer (QuikSCAT; QSCAT) winds and in situ daily winds from the Research Moored Array for African–Asian–Australian Monsoon Analysis and Prediction (RAMA). The primary objective of this study is to examine whether DASCAT is a reliable replacement for the widely used QSCAT wind products. Spatial distributions of DASCAT and QSCAT winds show good agreement in speed and direction, except over a few localized regions. The study finds a significant spatial coherence between rainfall and the regions of discrepancy between DASCAT and QSCAT. Comparison of DASCAT and QSCAT wind products with RAMA moorings indicates that DASCAT better captures the overall wind variability compared to QSCAT, especially during rainy and low wind (<5 m s−1) conditions. The root-mean-square of the RAMA–DASCAT (RAMA–QSCAT) difference during rainfall in the zonal an...
