[1]LIU Lei,GAO Hui,ZHANG Li,et al.Interdecadal Variability of Precipitation in Wuhu in Last 140 Years[J].Research of Soil and Water Conservation,2021,28(05):114-120.
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Interdecadal Variability of Precipitation in Wuhu in Last 140 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
114-120
Column:
Public date:
2021-08-20
- Title:
- Interdecadal Variability of Precipitation in Wuhu in Last 140 Years
- Keywords:
- decadal variation; dry-wet cycle; wavelet analysis; M-K method
- CLC:
- P467
- DOI:
- -
- Abstract:
- Global climate has significantly decadal change in the past century. Discussion on precipitation change of representative station in Middle and Lower Reaches of Yangtze River is meaningful. Based on precipitation observation data of Wuhu in last 140 years and CRU precipitation dataset,monthly precipitation series from 1880 to 2019 in Wuhu were corrected and constructed. Characteristics of precipitation series were analyzed through climate tendency,wavelet analysis,MK method and accumulative anomaly. The precipitation showed an alternate drying-wetting feature during the last one and a half centuries in Wuhu. Annual precipitation had quasi-forty,quasi-ten and quasi-five year periods and exhibited a weak increasing tendency in Wuhu. Spring precipitation had eighty-year period and displayed a decreasing trend. The period of summer precipitation was consistent with that of annual precipitation. Meanwhile,summer precipitation increased significantly and contributed most to annual precipitation. Autumn and winter precipitation showed no notable increasing tendency and their periods were different from those of spring and summer precipitation. Seasonal precipitation showed uniform less in the 1890s and abnormal more in 1900s and 1910s. It was very rare that seasonal precipitation changes were completely consistent from 1890s to 1910s. The decadal variation differences between the seasonal precipitation increased gradually after 1940s,especially in last twenty years. Winter precipitation showed the significantly increasing trend after 1997,while spring precipitation displayed the decreasing tendency after 2002 and autumn precipitation had increased obviously since 2011.
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Last Update:
2021-08-20