Quantitative estimation of orographic precipitation over the Himalayas by using TRMM/PR and a dense network of rain gauges

Akiyo Yatagai; Haruko Kawamoto

doi:10.1117/12.811943

3 December 2008 Quantitative estimation of orographic precipitation over the Himalayas by using TRMM/PR and a dense network of rain gauges

Akiyo Yatagai, Haruko Kawamoto

Author Affiliations +

Proceedings Volume 7148, Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions II; 71480C (2008) https://doi.org/10.1117/12.811943
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

Abstract

The Precipitation Radar (PR) data acquired by the Tropical Rainfall Measuring Mission (TRMM) over its 10 years of observation can be used to show the monthly rainfall patterns over the Himalayas. To validate and adjust these patterns, we used a dense network of rain gauges to measure daily precipitation over Nepal, Bangladesh, Bhutan, Pakistan, India, Myanmar, and China. We then compared TRMM/PR and rain gauge data in 0.05-degree grid cells (an approximately 5.5-km mesh). Compared to the rain gauge observations, PR systematically underestimated precipitation by 28% to 38% in summer (July-September). Monthly PR climatology was adjusted based on the monthly regressions between the 2 sets of data, and depicted.

Citation Download Citation

Akiyo Yatagai and Haruko Kawamoto "Quantitative estimation of orographic precipitation over the Himalayas by using TRMM/PR and a dense network of rain gauges", Proc. SPIE 7148, Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions II, 71480C (3 December 2008); https://doi.org/10.1117/12.811943

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