文献类型：期刊文献

英文题名：Interannual Variability of Marine Heat Waves in the South Indian Ocean

作者：Li, Chuang[1];Zheng, Shaojun[1,2,3];Shi, Huangyuan[1,2,3];Zheng, Chenyu[1];Xie, Lingling[1,2,3];Yan, Li[1,2,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang, Guangdong, Peoples R China;[3]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing, Peoples R China

年份：2026

卷号：39

期号：7

起止页码：1591

外文期刊名：JOURNAL OF CLIMATE

收录：SCI-EXPANDED(收录号：WOS:001711516400001)、、EI(收录号：20261620517531)、WOS

基金：This study is supported by the Guangdong Basic and Applied Basic Research Foundation (2026A1515012221) , the Guangdong Province Ordinary Universities Characteristic Innovation Project (2025KTSCX046) , the Innovative Team Plan for the Department of Education of Guangdong Province (2023KCXTD015) , the First-class Discipline Plan of Guangdong Province (080508032401, 080503032101, and PX-1292024003) , the program for scientific research start-up funds of Guangdong Ocean University (R19061) , and the Tropical Ocean Environment in Western Coastal Waters Observation and Research Station of Guangdong Province (2024B1212040008) .

语种：英文

外文关键词：Indian Ocean; Atmosphere-ocean interaction; ENSO; Sea surface temperature; Interannual variability

外文摘要：Marine heat waves (MHWs) are significant extreme climate events within the oceanic system that profoundly impact ecosystems and socioeconomic conditions. The south Indian Ocean (SIO) plays a critical role in both global and regional climate regulation, influencing climate variability in regions such as Africa and East Asia. This study systematically investigates the interannual variability and dynamic mechanisms of MHWs in the SIO based on satellite sea surface temperature data and reanalysis datasets from 1982 to 2021. The MHWs in the SIO exhibit significant interannual variability associated with El Ni & ntilde;o-Southern Oscillation (ENSO). The mean intensity anomaly of MHWs in the SIO region of 60 degrees-90 degrees E, 15 degrees-25 degrees S is significantly correlated with the Ni & ntilde;o-3.4 index with a correlation coefficient of 0.57, lagging the Ni & ntilde;o-3.4 index by 3 months. The mixed-layer heat budget analysis indicates that the energy source for MHWs in the SIO is mainly from the atmospheric net surface heat flux, particularly influenced by latent heat and longwave radiation. During the decaying phases of El Ni & ntilde;o events, abnormal northwesterly winds suppress the background southeasterly winds, reducing evaporation and suppressing latent heat release from the ocean. The increase in total clouds in the SIO weakens the shortwave radiation reaching the ocean surface, but the increase in high clouds strengthens the longwave radiation as a greenhouse effect. Meanwhile, the relatively shallow mixed-layer depth could promote the formation of MHWs. This study contributes to a deeper understanding of MHWs in the SIO and their relation to large-scale ocean-atmosphere processes.