Fig. 4: Feedback mechanism between the convection activity over the QTP and the HC in the South Asian monsoon region. | npj Climate and Atmospheric Science

Fig. 4: Feedback mechanism between the convection activity over the QTP and the HC in the South Asian monsoon region.

From: Northward propagation of Hadley Cell in the South Asian monsoon region driven by active convection over the Qinghai–Tibet Plateau triggered by sea surface temperature warming of the North Atlantic

Fig. 4

The anomalies structure of the vertical speed (-10−2 Pa/s) at 90°E (compared to the average value of 1961–2020) during (a) 1961–1990 and (b) 1991–2020; (c) meridional regression analysis on the low cloud cover in Zone A of the QTP and the vertical transport structure of atmospheric water vapor at 90° E in the summers of 1961–2018. The white spotted area exceeds the significance level of 0.1 (the flow field is the integration of the correlated vectors between the low cloud cover in Zone A and v-ω×-10−2, and the coloring is the correlation distribution of low cloud cover and specific humidity in Zone A); (d) deviation of the vertical transport structure of the atmospheric water vapor at 90°E between 1991–2020 and 1961–1990 (the flow field is integrated from v-w×-10−2 vectors, and the coloring is the deviation of specific humidity (g/kg) between the former and the latter 30 years); (e) deviation of the variation trend (the flow field is integrated from v-w×-10−2 vectors, and the coloring is the deviation of specific humidity (g/kg) between the former and the latter 30 years). The black dashed arrow represents the meridional circulation and uplift transport in (c–e).

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