[1]SHI Jialiang,WANG Xiuru,LI Shufang,et al.Variation Characteristics of Air Temperature and Precipitation in He’nan Province in Recent 50 Years[J].Research of Soil and Water Conservation,2017,24(03):151-156.
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Variation Characteristics of Air Temperature and Precipitation in He’nan Province in Recent 50 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 03
Page number:
151-156
Column:
Public date:
2017-06-28
- Title:
- Variation Characteristics of Air Temperature and Precipitation in He’nan Province in Recent 50 Years
- Keywords:
- precipitation; air temperature; Kriging interpolation; He’nan Province
- CLC:
- P468
- DOI:
- -
- Abstract:
- Under the background of global warming, the temporal and spatial variation of air temperature and precipitation in He’nan Province in recent 50 years were analyzed. Based on the daily average air temperature and daily precipitation data observed at 17 meteorological stations covering He’nan Province， the characteristics of climate changes from 1965 to 2014 were analyzed with the methods of climate tendency rate， cumulative anomaly method， Mann-Kendall test, Morlet wavelets analysis method and Kriging interpolation and so on. The results show that the average air temperature of He’nan Provincer showed the upward trend in recent 50 years， of which the climate tendency rate is 0.19℃/decade (p < 0.01). As for the seasonal temperatures， the temperature in summer was the only one that showed a declining trend， the others showed increasing trends， and the tendency rate in spring was the highest. The decade change of temperature showed that the average temperature during 1980 to 1990 dropped a little， and then it started to go up；the annual precipitation showed an overall upward trend， but the trend was not significant, it increased by 2.8 mm/decade (p > 0.05), the summer precipitation increased faster， the spring and autumn precipitation decreased a little. Over the past 50 years， the precipitation was rising from 1960s to 1980s， and then declining from 1980s to the middle 1990s， after that it went up again until the 21th century， and since 2003 the precipitation has continued to decrease. The result of Morlet wavelets analysis showed that the temperature of He’nan Province fluctuated significantly with the 27-year interval， and the other 15-year interval can also be seen；the precipitation fluctuated with the 12-year interval, accompanied by other 5-year and 30-year intervals. As for spatial distribution， the temperature of southeastern He’nan Provincer was higher than that of the northwestern area， and the central region has been warming faster； the precipitation in the south was richer than that in the north， but it also has a decreasing trend in the south， the precipitation in the central and eastern region showed an upward trend.
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