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DOI	10.1007/s00382-014-2310-6
	Comparison of multiple datasets with gridded precipitation observations over the Tibetan Plateau
	You, Qinglong; Min, Jinzhong; Zhang, Wei; Pepin, Nick; Kang, Shichang
发表日期	2015
ISSN	0930-7575
EISSN	1432-0894
卷号	45 期号:2019-03-04
英文摘要	Precipitation is a critical component of the water balance, and hence its variability is critical for cryospheric and climate change in the Tibetan Plateau (TP). Mean annual and seasonal precipitation totals are compared between gridded observations interpolated to a high resolution (0.5 degrees x 0.5 degrees) and multiple reanalysis type-datasets during 1979-2001. The latter include two NCEP reanalyses (NCEP1 and NCEP2), two European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses (ERA-40 and ERA-Interim), three modern reanalyses [the twentieth century reanalysis (20century), MERRA and CFSR] and three merged analysis datasets (CMAP1, CMAP2 and GPCP). Observations show an increase in mean precipitation from the northwestern to the southeastern (SE) regions of the TP which are divided by an isohyet of 400 mm, and overall trends during the studied period are positive. Compared with observations, most of the datasets (NCEP1, NCEP2, CMAP1, CMAP2, ERA-Interim, ERA-40, GPCP, 20century, MERRA and CFSR) can both broadly capture the spatial distributions and identify temporal patterns and variabilities of mean precipitation. However, most multi-datasets overestimate precipitation especially in the SE where summer convection is dominant. There remain substantial disagreements and large discrepancies in precipitation trends due to differences in assimilation systems between datasets. Taylor diagrams are used to show the correlation coefficients, standard deviation, and root-mean-square difference of precipitation totals between interpolated observations and assimilated values on an annual and seasonal basis. Merged analysis data (CMAP1 and CMAP2) agree with observations more closely than reanalyses. Thus not all datasets are equally biased and choice of dataset is important.
关键词	Precipitation Multi-datasets Observation Tibetan Plateau
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	CLIMATE DYNAMICS
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/111766
作者单位	Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster, Minist Educ,NIAMS,ESMC, Nanjing 210044, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	You, Qinglong,Min, Jinzhong,Zhang, Wei,et al. Comparison of multiple datasets with gridded precipitation observations over the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2015,45(2019-03-04).
APA	You, Qinglong,Min, Jinzhong,Zhang, Wei,Pepin, Nick,&Kang, Shichang.(2015).Comparison of multiple datasets with gridded precipitation observations over the Tibetan Plateau.CLIMATE DYNAMICS,45(2019-03-04).
MLA	You, Qinglong,et al."Comparison of multiple datasets with gridded precipitation observations over the Tibetan Plateau".CLIMATE DYNAMICS 45.2019-03-04(2015).