###
气象:2023,49(1):39-51
本文二维码信息
码上扫一扫!
ERA5再分析10 m风速数据在“两洋一海”的适用性分析
陈君芝,施晓晖,温敏
(中国气象科学研究院灾害天气国家重点实验室,北京 100081)
Applicability of ERA5 Surface Wind Speed Data in the Region of “Two Oceans and One Sea”
CHEN Junzhi,SHI Xiaohui,WEN Min
(State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081)
摘要
图/表
参考文献
相似文献
本文已被:浏览 236次   下载 1212
投稿时间:2022-04-27    修订日期:2022-08-25
中文摘要: 西太平洋-南海-东印度洋(以下简称“两洋一海”)地区对我国的天气气候、国家安全和社会经济有重要影响,但由于资料条件的限制,现有的海上高风速事件研究主要集中于近海,导致对“两洋一海”地区远洋高风速事件的时空分布、变化特征及其机理仍然不够了解,急需利用新的高分辨率资料进行深入的研究。目前欧州中期天气预报中心第五代全球大气再分析资料(ERA5)再分析近地面10 m风速数据与现场观测风速的比较研究还相对较少,因此本文将“两洋一海”地区的国际海洋大气综合数据集(ICOADS)锚定浮标观测资料与ERA5进行了对比分析。结果表明:ERA5再分析10 m风速数据能够较好地表现出海面风场的分布特点和变化特征。ERA5再分析资料具有较高的时空分辨率、较长的时间序列以及完整的数据记录,将其用于海上高风速事件的气候分析是可行的,且具有一定的优势。需要注意的是,ERA5再分析风速总体上存在低估实测风速的系统偏差,尤其是实测风速较大时,ERA5偏离于实测风速的现象更为明显。
Abstract:The Western Pacific-South China Sea-East Indian Ocean (two oceans and one sea) region has an important impact on the weather and climate, national security, as well as social economy of China. However, due to the limitation of data conditions, the existing research on high sea winds are mainly focused on the offshore, resulting in the insufficient understanding of the temporal and spatial distribution, the characteristics of changes and their mechanisms of high sea winds in the two oceans and one sea region. So, it is urgent to use new high-resolution data for in-depth research, but at present, there are relatively few comparative studies between ERA5 reanalysis surface winds and the observation data. Therefore, this paper compares the ICOADS moored buoy observation data with the ERA5 reanalysis data in the two oceans and one sea region, and the results show that the ERA5 reanalysis 10 m winds can well reflect the distribution and variation characteristics of sea surface wind field. In addition, the ERA5 reanalysis data has high temporal and spatial resolution, long time-series and complete data records. Using the ERA5 reanalysis data is feasible and has certain advantages for climate analysis of high sea winds. However, it should be noted that the ERA5 reanalysis surface wind speed generally has a systematic bias of underestimating the observed wind speed. In particular, the greater the observed wind speed, the greater the deviation of ERA5 from the observed wind speed.
文章编号:     中图分类号:P413    文献标志码:
基金项目:国家重点研发计划(2019YFC1510104)、国家自然科学基金重点项目(92158203)和中国气象科学研究院科技发展基金项目(2021KJ023)共同资助
引用文本:
陈君芝,施晓晖,温敏,2023.ERA5再分析10 m风速数据在“两洋一海”的适用性分析[J].气象,49(1):39-51.
CHEN Junzhi,SHI Xiaohui,WEN Min,2023.Applicability of ERA5 Surface Wind Speed Data in the Region of “Two Oceans and One Sea”[J].Meteor Mon,49(1):39-51.