LTO学术报告2020-35

热带海洋环境国家重点实验室学术报告(2020-34):

 

报告题目1: A Study of Climate Model Responses of the Western Pacific Subtropical High to El Ni?o Diversity

报告人:陈梦燕,助理研究员,博士毕业于中国科学院南海海洋研究所,博士期间曾赴加州大学-尔湾分校联合培养两年。主要从事海气相互作用及气候变化研究,研究内容主要包括ENSO的产生机制和气候影响等。目前共发表7篇论文,其中 SCI论文6篇。

报告摘要:  This study examines a climate model hindcast of the responses of the western Pacific subtropical high (WPSH) to three types of El Ni?o events: the Eastern Pacific (EP) El Ni?o and the types I and II of Central Pacific (CP-I and CP-II) El Ni?o. These El Ni?o types differ from each other in the central locations and patterns of their sea surface temperature (SST) anomalies. They invoke four different mechanisms to impact the WPSH. Hindcasts produced by the Taiwan Central Weather Bureau (CWB) Climate Forecast System 1-tiered model (TCWB1T1) are analyzed. These hindcasts realistically simulate the impacts on the WPSH during the CP-I El Ni?o, but overestimate the impacts during the decaying summer of the EP El Ni?o and during the developing autumn and early winter of the CP-II El Ni?o. The overestimates are mainly the result of an overly strong Maritime Continent regional circulation mechanism during EP El Ni?os and an overly strong Indian Ocean capacitor mechanism during CP-II El Ni?os. Further analyses show that these model biases are related to biases in the simulations of El Ni?o SST anomalies and the Walker circulation. Both model deficiencies are common to contemporary coupled climate models.

 

报告题目2:  赤道太平洋海表二氧化碳分压(pCO2sw)的年际、年代际变率和长期趋势研究现状

报告人: 邱爽,2017级博士研究生,主要研究方向为赤道太平洋pCO2sw时空分布特征及机制。

报告摘要:赤道太平洋海区是全球pCO2sw最高的海区之一,远高于pCO2air,表现为海洋向大气释放CO2。深入研究该海区pCO2sw时空分布变化及机制对预测全球碳收支变化具有重要意义。该海区pCO2sw呈现非常强的年际及年代际变化。前人对于年际变化的研究较为全面,其主要影响因素为ENSO位相和强度。而年代际的研究受资料长度的限制研究不足,前人研究发现其变化主要与PDO位相有关。pCO2sw的长期趋势与大气CO2增长率持平,而短期趋势中、东太平洋明显高于大气CO2增长率,西太平洋略低于或平行于大气CO2增长率。

 

会议时间:2020年12月31日(周四) 上午 9:00
线下会议地点:2号楼1201会议室

线上腾讯会议ID:725 1170 7545

主持人:王素芬副研究员、李少钿助理研究员

 

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