Fig. 3: Warming-induced changes in the latitudinal profiles of seed propensity index (SPI) and selected large-scale environmental variables.
From: Warming-induced contraction of tropical convection delays and reduces tropical cyclone formation
The results near the climatology peak of tropical cyclone (TC) seasons in (a, b) the northern hemisphere and (c, d) the southern hemisphere are displayed separately. a August changes in the SPI and its two terms, namely the negative 500-hPa vertical motion and the 850-hPa vorticity aggregation. b August changes in the negative vertical motion (hPa day−1), mid-troposphere (600-hPa) relative humidity (%), and vertical shear of zonal wind (m s−1). (c, d) are the same as (a, b), except for February changes. The horizontal dashed line indicates the latitudes of weighted Intertropical Convergence Zone (ITCZ) of the historical simulation (HPB) in the corresponding months. The changes below the 99% confidence level are marked with white breaks on the latitudinal profile lines. Source data are provided as a Source Data file.
