報 告 人:王意國 高級研究員,挪威南森環境與遙感中心(NERSC)
報告時間:2024年10月18日(星期五)下午14:00
報告地點:西康路1号伟德国际1916备用网址307室
主 持 人:沈浙奇 副教授
報告簡介:
Climate reanalyses refer to dynamically consistent reconstruction of past climate conditions using a combination of observational data and numerical models. It is of high importance to study climate variability, understand climate processes, and initialise climate predictions. We recently produced a long and coupled reanalysis from 1860 to the present with the Norwegian Climate Prediction Model (NorCPM) that assimilates sea surface temperature (SST) observations. NorCPM combines the Norwegian Earth System Model and the ensemble Kalman filter data assimilation method. SST is available for the whole period and is the primary source of instrumental oceanic measurements prior to the 1950s. Our reanalysis belongs to the category of sparse input reanalysis that minimizes artefacts due to changes in the observation network. The time extent of the reanalysis allows us to assess robustly the mechanisms driving the decadal variability and predictability. Furthermore, as we only used the oceanic data during assimilation, the reanalysis helps to understand the contribution of the ocean in driving variability of the climate system (e.g., the atmosphere and sea ice). We present a comprehensive analysis of the reanalysis in surface air temperature, sea level pressure, Arctic sea ice extent, ocean heat/salt content, and Atlantic Meridional Overturning Circulation (AMOC).
報告人簡介:
王意國,挪威南森環境與遙感中心高級研究員。2013年獲得巴黎綜合理工大學(世界大學排名第45位,法國大學排名第一位)的物理學博士,2019年入選挪威研究理事會“優秀青年人才”項目(約600萬人民币)。參加10餘項重大挪威研究理事會項目、北歐研究理事會項目及歐盟項目。目前是挪威研究理事會項目:1850年至今氣候再分析資料(簡稱CoRea,約600萬人民币)和挪威-中國合作項目:次季節-季節海冰預報研究(簡稱4SICE,約1200萬人民币)的主持人。他是挪威氣候預報系統(NorCPM)的主要研發者之一,成功參與第六次國際耦合模式比較計劃(CMIP6)的年代際氣候預測計劃(DCPP),參與世界氣象組織年際-年代際氣候預測計劃和國際海冰預測計劃。