Fig. 4
From: Evolution of tropical cyclone genesis regions during the Cenozoic era
Differences in large-scale environmental conditions during storm season caused by the tropical seaway closures (LP_closeIP minus LP_noclosure). a Sea surface temperature (shading; °C) and surface wind speed (contour; m s−1). b Potential intensity (m s−1). c Absolute meridional temperature gradient ( × 10−6 °C m−1) in the troposphere. d Vertical wind shear between 200 and 850 hPa (m s−1). e Relative humidity (shading; %) and vertical velocity (contour; Pa s−1) at 600 hPa. Negative and positive values in vertical velocity show anomalous ascents and descents, respectively. f Moist entropy deficit. g Genesis potential (×10−13 events m−2 month−1)
