Fig. 2From: Narrow and wide India–Burma trough-like circulations: their different impacts on precipitation over southern ChinaAnomalous 700-hPa winds (units: m s−1) regressed upon the (a) NIBT and (b) WIBT indices in winter for the period 1979–2019, in which anomalous winds significant at the 99% confidence level are highlighted in red. The blue solid and dashed boxes in (a) and (b) represent the regions which are used to define the NIBT and WIBT indicesBack to article page