Revisiting the Seasonal Evolution of the Indian Ocean Dipole from the Perspective of Process-Based Decomposition

作     者：ZHANG Guangli FAN Hanjie HUANG Ke LONG Tong SONG Wei XIE Qiang ZHANG Guangli;FAN Hanjie;HUANG Ke;LONG Tong;SONG Wei;XIE Qiang

作者机构：School of Marine SciencesSun-Yat Sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Institute of Deep-Sea Sciences and EngineeringChinese Academy of SciencesSanya 572000China State Key Laboratory of Tropical OceanographySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Laboratory for Regional Oceanography and Numerical ModelingPilot National Laboratory for Marine Science and TechnologyQingdao 266237China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2023年第22卷第6期

页      面：1453-1463页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：supported by the Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(No.2019QZKK0102) the National Natural Science Foundation of China(No.42176026) supported by the National Postdoctoral Program of Innovative Talents(No.BX2021324) 

主　　题：Indian Ocean Dipole climate feedback-response analysis method growth rate of the sea surface temperature anomaly seasonally dependent sea surface temperature anomaly water vapor feedback 

摘      要：The seasonal phase-locking feature of the Indian Ocean Dipole(IOD)is well ***,the seasonality ten-dency of sea surface temperature anomalies(SSTAs)during the development of the IOD has not been widely *** SSTA tendencies over the two centers of the IOD peak in September-October-November are of different monthly *** SSTA tendency over the west pole is small before June-July-August but dramatically increases in ***,the SSTA tendency over the east pole gradually increases before June-July-August and decreases since *** growth rate attribution of the SSTAs is achieved by examining the roles of radiative and non-radiative air-sea coupled thermodynamic processes through the climate feedback-response analysis method(CFRAM).The CFRAM results indicate that oceanic dynamic processes largely contribute to the total SSTA tendency for initiating and fueling the IOD SSTAs,similar to previous ***,these results cannot ex-plain the monthly amplitudes of SSTA *** negative feedback processes(cloud radiative feedback,atmospheric dynamic processes,surface sensible,and latent heat flux)together play a damping role opposite to the SSTA ***,the sea surface temperature-water vapor feedback shows positive ***,variations in SSTAs can change water vapor con-centrations through evaporation,resulting in anomalous longwave radiation that amplifies the initial SSTAs through positive *** effect of water vapor feedback is well in-phase with the monthly amplitudes of SSTA tendency,suggesting that the water vapor feedback might modulate the seasonally dependent SSTA tendency during the development of the IOD.