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Sensitivity of simulated summer monsoonal precipitation in Langtang Valley, Himalaya to cloud microphysics schemes in WRF

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A better understanding of regional-scale precipitation patterns in the Himalayan region is required to increase our knowledge of the impacts of climate change on glaciers, snowpacks, and downstream water availability. This study examines the impact of four cloud microphysical schemes (Thompson, Morrison, WRF Single-Moment 5-class (WSM5), and WRF Double-Moment 6-class (WDM6)) on summer monsoon precipitation in the Langtang Valley, Himalayas, as simulated by the Weather Research and Forecasting (WRF) model at 1.1 km grid spacing for a ten-day period. The model results are evaluated through a comparison with precipitation and radiation measurements made at two observation sites located on the Langtang Valley floor and on the adjacent mountain slopes. Additional understanding is gained from a detailed examination of the microphysical characteristics simulated by each scheme, and the roles of large and small-scale forcing.

This talk is part of the British Antarctic Survey series.

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