Atmosphere, Journal Year: 2023, Volume and Issue: 14(12), P. 1822 - 1822

Published: Dec. 14, 2023

Marine heatwaves (MHWs) are becoming more frequent and intense in many regions around the world, as well China’s marginal seas. However, seasonal characteristics associated physical drivers of MHWs largely unknown. In this study, we analyze, based on multiple reanalysis numerical model data, causes South China Sea (SCS) over a near 30-year period (1991–2022). There exist significant variabilities spatiotemporal features formation mechanisms MHWs. SCS show increasing trends terms frequency, duration, intensity. during summer half-year stronger than winter whole, with them being likely to occur eastern western region half-year. trend exceed those summer. Additionally, find that unusually strong west Pacific subtropical high (WPSH) both half-years. Nevertheless, dominant factors for different varied seasons. According upper ocean temperature equation analysis, surface heat flux anomalies (especially shortwave radiation flux) major effect half-year, while dynamic processes play main role An analysis typical also proves conclusion. Moreover, occurring often accompanied by within mixed-layer depth. The findings imply space–time distribution contrast SCS, rather simply due large-scale circulation anomalies. This may provide useful reference deeper understanding forecasting under seasons weather.

Language: Английский