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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 10 | Geoscience Letters

Fig. 10

From: Narrow and wide India–Burma trough-like circulations: their different impacts on precipitation over southern China

Fig. 10

Anomalous precipitation (units: mm) regressed upon the (a) vorticity-based, (b) geopotential height-based, and (c) vertical velocity-based IBT indices in winter for the period 1979–2019. Shadings denote positive/negative precipitation anomalies significant at the 95% and 99% confidence levels as shown by the color bars. The vorticity-based IBT index is defined as the area-mean 700-hPa vortices averaged over (15–25 °N, 80–100 °E), the geopotential height-based IBT index is defined as the area-mean 700-hPa geopotential height averaged over (17.5–27.5 °N, 80–100 °E), and the vertical velocity-based IBT index is defined as the area-mean 700–500-hPa vertical velocity averaged over (15.625–24.375 °N, 90.625–100.625 °E). The thick black contour denotes the Tibetan Plateau

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