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冰川冻土 ›› 2020, Vol. 42 ›› Issue (4): 1145-1157.doi: 10.7522/j.issn.1000-0240.2019.1158

• 冰冻圈与全球变化 • 上一篇    下一篇

中国第一代再分析产品CRA Interim气温在东南极中山站 - Dome A断面的适用性分析

朱江萍1,2(), 谢爱红1(), 丁明虎3, 赵聪4, 郭晓寅3, 胡婉嫔1,2, 徐冰1,2, 秦翔1   

  1. 1.中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
    2.中国科学院大学, 北京 100049
    3.中国气象科学研究院, 北京 100081
    4.西南交通大学 地球科学与环境工程学院, 四川 成都 611756
  • 收稿日期:2019-07-09 修回日期:2019-11-20 出版日期:2020-12-31 发布日期:2021-01-21
  • 通讯作者: 谢爱红 E-mail:zhujiangping@lzb.ac.cn;xieaih@lzb.ac.cn
  • 作者简介:朱江萍(1997 - ), 女, 黑龙江双鸭山人, 2018年在兰州大学获学士学位, 现为中国科学院西北生态环境资源研究院在读博士研究生, 从事极地气候研究. E-mail: zhujiangping@lzb.ac.cn
  • 基金资助:
    国家自然科学基金项目(41671073)

Applicability analysis of the air temperature in the CMA Global ReAnalysis product CRA Interim in the section from Zhongshan Station to Dome A, East Antarctica

Jiangping ZHU1,2(), Aihong XIE1(), Minghu DING3, Cong ZHAO4, Xiaoyin GUO3, Wanpin HU1,2, Bing XU1,2, Xiang QIN1   

  1. 1.State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Chinese Academy of Meteorological Sciences,Beijing 100081,China
    4.Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China
  • Received:2019-07-09 Revised:2019-11-20 Online:2020-12-31 Published:2021-01-21
  • Contact: Aihong XIE E-mail:zhujiangping@lzb.ac.cn;xieaih@lzb.ac.cn

摘要:

2017年中国气象局发布中国第一代全球大气和陆面再分析产品(以下简称“中国再分析产品”)CRA Interim, 通过对比CRA Interim气温资料与中国在南极考察区域中山站 - Dome A断面气象站实测2 m气温、 欧洲中期数值预报中心再分析产品(以下简称“欧洲再分析产品”)ERA Interim和ERA5相应的气温资料, 分析了CRA Interim气温在东南极中山站 - Dome A断面的适用性。结果表明: 三种再分析产品均能反映研究区域的气温变化, 均具有一定适用性, 但是都存在一定偏差且适用性存在区域差异和季节差异。CRA Interim、 ERA Interim、 ERA5对中山站 - Dome A断面气温的解释方差分别为81.3%、 87.1%、 87.2%。中国与欧洲再分析产品对日均值与最低温的反演都呈现负偏差, CRA Interim对最高温的反演表现为负偏差(-1.8 ℃), 欧洲再分析产品则表现为正偏差(ERA Interim和ERA5偏差分别为0.5 ℃和0.8 ℃)。中国与欧洲再分析产品在位于冰盖边缘的中山站适用性最好, 位于冰盖内陆的Dome A次之, 对Eagle站气温的反演偏差较大。三种再分析产品对冬季气温反演最差, ERA Interim对秋季气温反演最好, CRA Interim和ERA5对夏季气温反演最好。CRA Interim、 ERA Interim、 ERA5对极端低温事件发生时最低温的解释方差分别为46.1%、 76.9%、 87.3%, 对极端高温事件发生时最高温的解释方差分别为59.9%、 65.1%、 73.6%, 极端事件发生时ERA5对极端气温的反演更为准确。2016年9月3日 - 13日极端低温事件主要受冷高压的影响, 7月25日 - 8月6日极端高温事件主要受暖低压和暖舌的影响。CRA Interim能够反演东南极中山站 - Dome A断面的气温及极端气温事件的变化, 但对风场尤其是中山站风场的反演不准确。与欧洲再分析产品相比, CRA Interim在中山站 - Dome A断面的适用性较低, 三种再分析产品中ERA5更适于南极极端天气与气候的研究。

关键词: CRA Interim, ERA Interim, ERA5, 东南极, 气温, 极端事件

Abstract:

The CMA Global ReAnalysis product CRA Interim was released in 2017 by China Meteorological Administration. The accuracy of daily minimum, maximum and mean 2-m air temperatures (TminTmaxTmean) in 2016 from CRA Interim was assessed against field observations and ECMWF Re-Analysis products (ERA Interim and ERA5). The field observations were from Zhongshan Station, Eagle Station and Dome A that located in East Antarctica. It was found that CRA Interim can capture temporal temperature variations, with an explained variance more than 81.0%, and generally showed a negative bias of -0.5, -1.8, -1.3 ℃ for TminTmax and Tmean, respectively. Similar as ECMWF Re-Analysis products, CRA Interim showed a regional variability, and performed better at Zhongshan Station. CRA Interim and ERA5 performed better in summer, while ERA Interim performed better in autumn. CRA Interim can explain the temperature variance of more than 45.0% for extreme low temperature event, and close to 60.0% for extreme high temperature event. The cold event occurred during Sept. 3 to Sept. 13, which was mainly affected by stronger cold high pressure. The warm event occurred during Jul. 25 to Aug. 6, and was mainly affected by warm low pressure and warm tongue. An analysis on temperature and pressure fields indicated that CRA Interim can replicate the progress of temperature extremes developing, occurring and disappearing. However, it doesn’t work well in wind field, particularly at Zhongshan Station. ECMWF Re-Analysis products perform better than CRA Interim, and ERA5 is a more powerful tool for extreme weather and climate studies in East Antarctica.

Key words: CRA Interim, ERA Interim, ERA5, East Antarctica, air temperature, extreme events

中图分类号: 

  • P423.3