[1]陈 涛,智 海,边 多*.青藏高原观测地表温度与ERA-Interim再分析资料的差异及归因分析[J].山地学报,2019,(01):1-8.[doi:10.16089/j.cnki.1008-2786.000393]
　CHEN Tao,ZHI Hai,BIAN Duo*.Investigation on the Discrepancy between Observed Surface Temperature and ERA-Interim over the Qinghai-Tibet Plateau and Its Attribution[J].Mountain Research,2019,(01):1-8.[doi:10.16089/j.cnki.1008-2786.000393]
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青藏高原观测地表温度与ERA-Interim再分析资料的差异及归因分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2019年01期
页码:
1-8
栏目:
山地环境
出版日期:
2019-03-10

文章信息/Info

Title:
Investigation on the Discrepancy between Observed Surface Temperature and ERA-Interim over the Qinghai-Tibet Plateau and Its Attribution
文章编号:
1008-2786-(2019)1-001-08
作者:
陈 涛1; 2; 智 海1; 边 多2*
1. 南京信息工程大学 气象灾害教育部重点实验室,南京 210044; 2. 西藏高原大气环境科学研究所,拉萨 850000
Author(s):
CHEN Tao1; 2;  ZHI Hai1;  BIAN Duo2*
1. College of atmospheric science, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2. Tibet Institute of Plateau Atmospheric and Environmental Science, Lhasa 850000, China
关键词:
青藏高原;  地表温度;  ERA-Interim;  误差分析;  地形影响
Keywords:
Qinghai-Tibet Plateau;  surface temperature;  ERA-Interim;  error analysis;  topographic effect
分类号:
P413.2
DOI:
10.16089/j.cnki.1008-2786.000393
文献标志码:
A
摘要:
再分析资料评估对观测资料稀少的青藏高原具有重要意义,是开展青藏高原相关研究的基础。本文分析了2012—2016年观测与ERA-Interim再分析地表温度资料在青藏高原的时空分布差异,同时讨论了产生差异的可能原因。结果表明,两种资料变化趋势基本一致,极值出现月份相同,相关性的空间分布表现为北高南低。ERA-Interim再分析资料对地表温度存在低估,年平均值比观测资料低8.86℃,其中春季绝对误差最大。年平均绝对误差呈北低南高的空间分布形态,且绝对误差极值中心的强度及范围具有明显的季节变化。ERA-Interim与观测地表温度之间的偏差随气象站海拔高度的变化是非单调的,分析认为气象站与所在格点的海拔差是导致偏差出现南北差异的原因之一,而春季青藏高原南部的偏差异常可能与积雪有关。ERA-Interim再分析地表温度资料在青藏高原北部具有较好的适用性,南部受地形影响适用性相对较差。
Abstract:
The evaluation on the applicability of reanalysis data is of great significance to the Qinghai-Tibet Plateau due to the unavailability of in-situ surface temperature observations over the Plateau, and therefore it serves as a basis for researches related to the Qinghai-Tibet Plateau. This paper analyzed the differences in the tempo-spatial distribution of surface temperatures between the field observation data from 2012 to 2016 and the ERA-Interim reanalysis data in the Qinghai-Tibet Plateau, and then it interpreted the inconsistency. Results found that the variation trends of the two types of data were basically the same, with the extreme values of surface temperatures appearing at the same time, and their correlation coefficient was high in the north and low in the south. ERA-Interim reanalysis data underestimated surface temperatures with an annual average of 8.86℃ lower than observed data. The absolute error between ERA-Interim and the observed surface temperature data demonstrated a spatial distribution pattern, with low values in the north and high ones in the south, and the intensity and range of extreme value center of absolute error had obvious seasonal variation, with an absolute error in spring being the largest. It concludes that the difference in altitude between meteorological stations and grid point was one of the reasons for the discrepancy in absolute error occurring between the north and the south. The larger error in ERA-Interim data in the southern Qinghai-ITibet Plateau in spring may be relevant to snow cover. ERA-Interim reanalysis surface temperature data have good applicability in the northern Qinghai-Tibet Plateau, while the applicability in the southern is relatively poor largely due to topographic influences.

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-07-14; 改回日期(Accepted date):2019-01-12
基金项目(Foundation item):西藏自治区重点科技计划项目( XZ201703-GA-01); 国家自然科学基金重大研究计划(91437218); 西藏自治区科技厅自然基金项目(XZ2017ZRG-114); 中国气象局成都高原气象研究所开放基金项目(LPM2014005)。[Tibet Key Technology Plan(XZ201703-GA-01); Major Research Project of the National Natural Science Foundation of China(91437218); Natural Foundation of Tibet Science and Technology Department(XZ2017ZRG-114); Open Fund of Chengdu Institute of Plateau Meteorology, CMA(LPM2014005)]
作者简介(Biography):陈涛(1983-),男,湖北潜江人,硕士研究生,主要从事高原遥感与生态环境研究。[CHEN Tao(1983-), male, born in Qianjiang, Hubei province, M.Sc. candidate, research on plateau environment and remote sensing] E-mail: tibet_ct@163.com.
*通讯作者(Corresponding author):边多(1966-),研究员级高级工程师,主要从事卫星遥感与资源环境评价。[BIAN Duo(1966-), male, professor, research on satellite remote sensing and resource environmental assessment] E-mail: dor_ben2000@yahoo.com.cn.
更新日期/Last Update: 2019-01-30