Establishment and Assessment of the Grid Air Temperature Data Sets in China for the Past 57 Years

Zhang Qiang; Ruan Xin; Xiong Anyuan

Vol.20, NO.4, 2009

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2009 > 20(4): 385-393

Zhang Qiang, Ruan Xin, Xiong Anyuan. Establishment and assessment of the grid air temperature data sets in China for the past 57 years. J Appl Meteor Sci, 2009, 20(4): 385-393.

Citation:

Zhang Qiang, Ruan Xin, Xiong Anyuan. Establishment and assessment of the grid air temperature data sets in China for the past 57 years. J Appl Meteor Sci, 2009, 20(4): 385-393.

Zhang Qiang, Ruan Xin, Xiong Anyuan. Establishment and assessment of the grid air temperature data sets in China for the past 57 years. J Appl Meteor Sci, 2009, 20(4): 385-393.

Citation:

Zhang Qiang, Ruan Xin, Xiong Anyuan. Establishment and assessment of the grid air temperature data sets in China for the past 57 years. J Appl Meteor Sci, 2009, 20(4): 385-393.

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Establishment and Assessment of the Grid Air Temperature Data Sets in China for the Past 57 Years

National Meteorological Inf ormation Center, Bei jing 100081

Received Date: 2008-11-11
Rev Recd Date: 2009-05-20
Publish Date: 2009-08-31

Abstract

Abstract

Temperature data from meteorological stations in China for the past 57 years are interpolated by introducing digital elevation model(DEM) and taking the edge effect of interpolations into consideration on the basis of the ordinary Kriging method. Using this method, the daily, monthly and annual mean data sets of the grid-based temperature in China with the resolution of 1°latitude by 1°longitude are obtained. The results of the grid data sets quality assessment show that DEM has an apparent effect on the spatial structure of temperatures and plays an important role on interpolations. Great improvements on the spatial interpolation in alpine spots are achieved after exploiting DEM. Compared with station data, grid data sets are more plausible to depict the annual and seasonal mean temperature distribution. The grid data sets can well simulate the spatial difference of the annual mean temperature trends in China. The grid data sets can also well demonstrate the change of annual mean temperature in China which as a whole rises by about 1.6 ℃ for 1951—2007, with a warming rate of about 0.28 ℃/10 a. The warming in the later half 20th century is more rapid than the average values of the world and the Northern Hemisphere. The most evident warming occurs in the past over 20 years. The grid data sets also indicate that: Period from 1998 to 2007 is a decade when the annual mean temperature is the highest since 1951, amongst which the annual mean temperature anomaly in 2006 is close to that in 1998 with the highest value before 2000, and the annual mean temperature anomaly in 2007 with a value of 1.3 ℃ beyond that in 1998, is the highest since 1951.
- surface air temperature;
- spatial interpolation;
- grid data set;
- quality assessment

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References(30)

Figures and Tables

图 1 1951年1月--2007年12月GHCN资料补充前后台站数量对比

Fig. 1 The station number variation after using GHCN in China from January 1951 to December 2007

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图 2 高程订正前后1980年7月我国地面月平均气温空间结构及试验变异函数拟合效果对比

（a）原始站点温度，（b）高程订正后的温度

Fig. 2 Original and adjusted spatial structure of the monthly mean temperatures over China in July 1980

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图 3 1961-2007年560个台站年平均气温观测资料序列与其临近格点序列的相关系数空间分布

Fig. 3 Correlation coefficients of the annual mean temperature in 560 stations with that in its adjacent grid point during 1961-2007

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图 4 1971-2000年我国年平均气温空间分布 (单位:℃; 底图不同颜色代表数字高程)

(a) 站点资料二维插值, (b) 格点数据集

Fig. 4 Spatial distribution of the annual mean temperature over China during 1971-2000 (unit:℃; the different colors denote DEM)

(a) station data, (b) grid data sets

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图 5 1961-2005年我国年平均气温变化趋势的空间分布 (单位:℃/ 10 a)

(a) 站点资料二维插值, (b) 格点数据集

Fig. 5 Trends in annual mean temperature over China during 1961-2005 (unit:℃/ 10 a)

(a) station data, (b) grid data sets

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图 6 1961-2005年我国1月和7月平均气温趋势 (单位:℃/ 10 a)

(a)1月站点资料二维插值, (b)1月格点数据集, (c)7月站点资料二维插值, (d)7月格点数据集

Fig. 6 Trends in monthly mean temperature over China in January and July during 1961-2005 (unit:℃/ 10 a)

(a) station data in January, (b) grid data sets in January, (c) station data in July, (d) grid data sets in July

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图 7 1951-2007年全国 (a) 及我国东部地区 (b) 年平均气温距平时间序列

Fig. 7 The time series of the annual mean temperature anomaly over China (a) and the east part of China (b) during 1951-2007

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表 1 6种插值方法对近10年全国7月温度场的空间插值交叉验证结果

Table 1 The spatial interpolation effect of ordinary Kriging and five other methods over China in July during 1998-2007

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