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DOI	10.1016/j.gloplacha.2013.10.003
	Can temperature extremes in China be calculated from reanalysis?
	You, Qinglong; Fraedrich, Klaus; Min, Jinzhong; Kang, Shichang; Zhu, Xiuhua; Ren, Guoyu; Meng, Xianhong
发表日期	2013
ISSN	0921-8181
EISSN	1872-6364
卷号	111
英文摘要	Based on daily maximum, minimum and mean surface air temperature from National Centers for Environmental Prediction/National Center for Atmospheric Research Reanalysis (NCEP/NCAR) and European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses, the distributions of twenty temperature indices are examined in China during 1958-2011. ECMWF includes ERA-40 for the period 1958-2001 and ERA-Interim during 2002-2011. The consistency and discrepancy of extreme indices between reanalyses and observations (303 stations) are assessed. In most cases, temperature indices between NCEP/NCAR and ECMWF have good agreements. For both reanalysis, cold days/nights have decreased, while warm days/nights have increased since 1980. Temperatures of the coldest days/nights and warmest days/nights significantly increase over the entire China, and the diurnal temperature range demonstrates slight variations; the amounts of growing season length, and summer/tropical days have increased, consistent with the decrease in numbers of frost/ice days. Furthermore, the persistence of heat wave duration and warm spell days has increased and consecutive frost days have reduced. Meanwhile, consecutive frost days, cold wave duration and cold spell days from NCEP/NCAR have decreased and consecutive frost days have increased, while these indices from ECMWF turn to the opposite directions. Compared with observations, temperature extremes from two reanalyses have small relative bias and the root mean squared errors, while correlation coefficients are positively high. These suggest that both reanalyses can reproduce the variability of temperature extremes obtained from observations, and can be applied to investigate climate extremes to some extent, although the biases exist due to the assimilation differences. (C) 2013 Elsevier B.V. All rights reserved.
关键词	temperature extremes reanalysis NCEP/NCAR and ERA-40 China
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111677
作者单位	Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing 210044, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	You, Qinglong,Fraedrich, Klaus,Min, Jinzhong,et al. Can temperature extremes in China be calculated from reanalysis?[J]. 中国科学院西北生态环境资源研究院,2013,111.
APA	You, Qinglong.,Fraedrich, Klaus.,Min, Jinzhong.,Kang, Shichang.,Zhu, Xiuhua.,...&Meng, Xianhong.(2013).Can temperature extremes in China be calculated from reanalysis?.GLOBAL AND PLANETARY CHANGE,111.
MLA	You, Qinglong,et al."Can temperature extremes in China be calculated from reanalysis?".GLOBAL AND PLANETARY CHANGE 111(2013).