Comparison of Reanalysis Data and Observations about Summer Maximum Temperature on Different Time Scales in Eastern China

ZHANG Ting; GAO Qingjiu; SUN Yuting

doi:10.7522/j.issn.1000-0534.2016.00030

2017 , Vol. 36 >Issue 2: 468 - 479

DOI: https://doi.org/10.7522/j.issn.1000-0534.2016.00030

Comparison of Reanalysis Data and Observations about Summer Maximum Temperature on Different Time Scales in Eastern China

ZHANG Ting ,
GAO Qingjiu ,
SUN Yuting

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Climate Dynamics Research Center (CDRC) of the College of Atmospheric Sciences/Key Laboratory of Meteorological Disaster of the Ministry of Education (ELME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, China;Hubei province public meteorological service center, Wuhan 430074, China

Received date: 2015-10-26

Online published: 2017-04-28

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Abstract

Based on daily maximum temperature derived from the ground observation dataset of China meteorological data sharing network (OT) and JRA-55, ERA-Interim, NCEP/NCAR, NCEP/DOE reanalysis datasets, respectively, linear trend analysis, variance analysis, EOF analysis and filtering methods were used to compare multi-scale features of reanalysis and observation daily maximum temperature in summer during 19792013 in eastern China.Results show that: The average daily maximum temperature in summer during 1979-2013 decreased gradually from south to north and is above 30 ℃ to the south of the middle and lower reaches of the Yangtze River; The ability of reanalysis data to depict these characteristics from high to low is JRA-55, ERA-Interim, NCEP/DOE, NCEP/NCAR.In recent 35 years, the daily maximum temperature in summertime in the eastern region shows increasing trend, while the middle and lower reaches of the Yangtze river and eastern Inner Mongolia region shows obvious increase trend; The ability of reanalysis data to reproduce the characteristics in different regions have their own advantages and disadvantages, with JRA-55 slightly better than other datasets.The average daily maximum temperature in summer shows opposite distribution to the north and south of the middle and lower reaches of the Yangtze River, the distribution of ERA-Interim is very closely to the observations, then the NCEP/DOE.The temporal feature of summer maximum temperature is interannual variation, the ERA-Interim data is the one which interannual feature is most similar to the observations'.After 21st century, the temporal characteristics of JRA-55, NCEP/NCAR and NCEP/DOE is relatively similar to the observation data, showing the amplitude decreased and then picks up; The daily maximum temperature of summer main period is 20~60 days.The variance contribution of intra seasonal variability of the summer daily maximum temperature in Yunnan, Guizhou, Northeast China and the eastern Gansu, Shanxi area is larger.The reproduction ability of the 4 reanalysis for intra-seasonal variability from high to low is JRA-55, ERA-Interim, NCEP/DOE and NCEP/NCAR.

Key words： The maximum temperat; The observation data; Reanalysis data; Multi-scale; Comparison

Cite this article

ZHANG Ting , GAO Qingjiu , SUN Yuting . Comparison of Reanalysis Data and Observations about Summer Maximum Temperature on Different Time Scales in Eastern China[J]. Plateau Meteorology, 2017 , 36(2) : 468 -479 . DOI: 10.7522/j.issn.1000-0534.2016.00030

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