Contribution of Tropical Cyclones to Precipitation around Reclaimed Islands in the South China Sea

Abstract

Tropical cyclones (TCs) play an important role in the precipitation of tropical oceans and islands. The temporal and spatial characteristics of precipitation have become more complex in recent years with climate change. Global warming tips the original water and energy balance in oceans and atmosphere, giving rise to extreme precipitation events. In this study, the monthly precipitation ratio method, spatial analysis, and correlation analysis were employed to detect variations in precipitation in the South China Sea (SCS). The results showed that the contribution of TCs was 5.9% to 10.1% in the rainy season and 7.9% to 16.8% in the dry season. The seven islands have the same annual variations in the precipitation contributed by TCs. An 800 km radius of interest was better for representing the contribution of TC-derived precipitation than a 500 km conventional radius around reclaimed islands in the SCS. Four track patterns of TCs were defined. The order according to the primary pattern of contribution was I (26–85.3%) > IV (12.8–29.8%) > III (4.3–29%) > II (11.5–24%). The average distance between islands and TCs was 1163 and 712 km in the rainy and dry seasons, respectively. The average contribution was larger in La Niña than in El Niño periods. These results could be beneficial for managing rainwater resources, especially the TC-induced precipitation in the reclaimed islands.

Coral Reveals a Transition in Sources of Seawater Vanadium From Submarine Groundwater Discharge to Upwelling in the Northern South China Sea

“…Therefore, the effect of the vertical mixing of seawater caused by TCs on the V concentration in Sanya surface waters does not appear significant. In fact, TCs also play a crucial role in the generation of precipitation in the SCS (Yao et al., 2020). Cui et al.…”

“…Therefore, the effect of the vertical mixing of seawater caused by TCs on the V concentration in Sanya surface waters does not appear significant. In fact, TCs also play a crucial role in the generation of precipitation in the SCS (Yao et al, 2020). Cui et al (2022) reported a statistically significant positive correlation between total annual SCS precipitation and the annual number of TCs passing through the SCS.…”

Spatial and attribute filtering as a complementary measure in the statistical prediction of tropical cyclone rainfall

“…Our approach produces distributed rainfall values, which are essential for various applications such as water supply planning, flood management, and disaster preparedness (Yao et al, 2020). In the WNP region, where hundreds of thousands to millions of people are affected by TCs every year, the accurate estimation of distributed rainfall values can aid in the development of effective disaster preparedness plans, including the evacuation of vulnerable communities, mobilization of emergency services, and deployment of relief supplies.…”

Enhanced Tropical Cyclone Precipitation Prediction in the Northwest Pacific Using Deep Learning Models and Ensemble Techniques

“…Tropical cyclones (TCs) are one of the world's most destructive natural disasters, bringing heavy rainfall, strong winds, and substantial storm surges that endanger the property and lives of coastal residents [1,2]. They are responsible for 35-50% of the world's extreme rainfall, resulting in catastrophic flooding and natural disasters [3].…”