三种再分析气温数据在浙江周边岛屿的适用性评估  

Evaluation of Surface Air Temperature in Three Reanalysis Datasets on Islands Adjacent to Zhejiang

作　　者：宋亚娟[1,2] 宋振亚 秦渭华[3] 魏永杰 SONG Ya-juan;SONG Zhen-ya;QIN Wei-hua;WEI Yong-jie(The First Institute of Oceanography,SOA,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266061,China;East China Sea Marine Environmental Survey Center,State Oceanic Administration,Shanghai 200137,China;Ningbo Marine Environmental Monitoring Center Station,State Oceanic Administration,Ningbo 315200,China)

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室,山东青岛266061 [3]国家海洋局东海海洋环境调查勘察中心,上海200137 [4]宁波海洋环境监测中心站,浙江宁波315012

出　　处：《海洋科学进展》2018年第4期499-511,共13页Advances in Marine Science

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目--束星北青年基金(2016S03);国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目--海洋环境动力学与数值模拟(U1606405);青岛海洋科学与技术国家实验室鳌山人才计划-优秀青年学者专项(2017ASTCP-ES04);国家海洋局海岛保护与管理项目-海岛物种资源控制因子调查评估与区划示范;国家海洋局中韩海洋领域合作项目-西北太平洋气候变化趋势研究项目

摘　　要：由于海岛资料相对匮乏,对其气象条件的分析工作较为零散,对海岛气候分布特征尚缺乏清晰的认识。本文利用浙江及周边岛屿26个站点的观测资料,通过均值、标准差和相关系数等统计方法定量评估了NCEP/NCAR-Reanalysis 1(NCEP-1),ERA-Interim和JRA-55三种再分析气温数据在浙江周边海岛的可信度。结果表明:3种再分析数据均能够重现近地面气温的年循环特征,但再分析数据得到的冬季气温偏高,而在夏季,NCEP-1相对于其他2种再分析数据重构的气温显著偏低。从相关系数、标准偏差等多个统计指标来看,ERA-Interim再分析数据对浙江周边岛屿气温的再现能力较好。积温的分析结果表明,基于ERA-Interim计算的26个测站的平均积温和标准差分别为5 818和498℃,与实测5 728和324℃最为接近,JRA-55的平均积温偏差最大,NCEP-1标准差偏差最大。从26个测站积温的空间分布来看,基于ERA-Interim得到的积温空间分布基本上重现了浙江周边岛屿积温带受纬度和海陆分布影响的特征;JRA-55再分析数据次之,因三门健跳至岱山的部分海岛上积温比实测资料偏高,从而导致积温南北分布与实测不一致;而NCEP-1存在明显的偏差,在27°～28°N区积温偏低,在29°～30°N区积温却偏高,甚至超过了6 000℃,这使得根据NCEP-1得到的积温带南北分布与实测差别较大。整体而言,针对气温的分析研究,ERA-Interim再分析数据对浙江周边岛屿地区具有较好的适用性,可以作为地表温度的替代数据。Understanding of the meteorological conditions and climatic characteristics on the islands is still insufficient due to lack of observations data.In this study,surface air temperature(SAT)in three reanalysis datasets,NCEP/NCAR Reanalysis 1(NCEP-1),ERA-Interim,and JRA-55,are evaluation by comparing with observations data at 26 stations on adjacent islands of Zhejiang province.The results show that all of three reanalysis datasets can reproduce the annual cycle of SAT,although the reanalyzed SAT is warmer in winter and colder in summer than observed SAT.Spatially,three reanalysis datasets underestimate the SAT in coastal area but overestimate temperature on offshore islands.By evaluating correlation coefficients,standard deviation of SAT and accumulated temperature that defined as the sum of temperatures greater than or equal to 10℃,it indicates that the ERA-Interim can better reproduce SAT observed on adjacent islands of Zhejiang province than the other two reanalysis datasets.Therefore,the ERA-Interim reanalysis dataset can be used as an alternative dataset for observed SAT on the islands near Zhejiang province.

关 键 词：浙江海岛 气温 再分析数据 积温 

分 类 号：P731.11[天文地球—海洋科学]