Asian Monsoon Monitoring Indices

Time-series representation of the zonal wind shear index between 200 hPa and 850 hPa averaged over the North Indian Ocean and southern Asia (shown by the rectangle on the bottom: equator - 20°N, 40°E - 110°E)
The zonal wind shear index is calculated after Webster and Yang (1992). The thick and thin pink lines indicate seven-day running mean and daily mean values, respectively. The black line denotes the normal (i.e., the 1991 - 2020 average), and the gray shading shows the range of the standard deviation calculated for the time period of the normal.

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	Time-series representation of the zonal wind shear index between 200 hPa and 850 hPa averaged over the North Indian Ocean and southern Asia (shown by the rectangle on the bottom: equator - 20°N, 40°E - 110°E) The zonal wind shear index is calculated after Webster and Yang (1992). The thick and thin pink lines indicate seven-day running mean and daily mean values, respectively. The black line denotes the normal (i.e., the 1991 - 2020 average), and the gray shading shows the range of the standard deviation calculated for the time period of the normal.		Time-series representation of OLR (W/m²) averaged over India and the Bay of Bengal (shown by the rectangle on the bottom: 10°N - 25°N, 70°E - 100°E) The OLR index is calculated after Wang and Fan (1999). The thick and thin blue lines indicate seven-day running mean and daily mean values, respectively. The black line denotes the normal (i.e., the 1991 - 2020 average), and the gray shading shows the range of the standard deviation calculated for the time period of the normal.