| A PRELIMINARY STUDY OF SNOW MASS VARIATIONS IN CHINA OVER THE PAST 30 YEARS |
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| 作者姓名： | 李培基 |
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| 作者单位： | Lanzhou Institute |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China through Grant No.4880019. |
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| 摘 要： | Daily snow data for 2300 climate stations covering the period from 1951 through 1980 have been used to monitorand diagnose secular variations,year-to-year fluctuations,and the spatial characteristics of snow variation trends inChina.An examination of time series reveals that there is a strong teleconnction to ENSO,to major volcanic eruptions,as well as to the CO_2-induced warming.The country-wide snow mass variations are positively correlated with globalmean temperature,increasing during the current warming period and decreasing during the recent cooling period priorto the mid 1960s.A synchronous relationship exists between El Nino/Southern Oscillation and snowy winter in China.The year-to-year snow fluctuations seem to be generally out of phase with volcanic activity.The anomaly map showsthat snow mass increased in high altitudes and moist regions,while it decreased in arid lowland and the southern bounda-ry zone during the warming period.The potential CO_2-induced changes in snow mass will further aggravate the regionaldifferentiation between high mountains and lowlands,between moist and arid regions.The number of snow cover dayswill decrease in the northern lowlands,and snowfall will increase in the Qinghai-Xizang Plateau,high mountains,andthe lower reaches of the Changjiang(Yangtze)River.
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A PRELIMINARY STUDY OF SNOW MASS VARIATIONS IN CHINA OVER THE PAST 30 YEARS |
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| Li Peiji Lanzhou Institute of Glaciology and Geocryology,Academia Sinica,Lanzhou.A PRELIMINARY STUDY OF SNOW MASS VARIATIONS IN CHINA OVER THE PAST 30 YEARS[J].Acta Meteorologica Sinica,1992(2). |
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| Authors: | Li Peiji Lanzhou Institute of Glaciology and Geocryology Academia Sinica Lanzhou |
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| Affiliation: | Li Peiji Lanzhou Institute of Glaciology and Geocryology,Academia Sinica,Lanzhou 730000 |
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| Abstract: | Daily snow data for 2300 climate stations covering the period from 1951 through 1980 have been used to monitor and diagnose secular variations,year-to-year fluctuations,and the spatial characteristics of snow variation trends in China.An examination of time series reveals that there is a strong teleconnction to ENSO,to major volcanic eruptions, as well as to the CO_2-induced warming.The country-wide snow mass variations are positively correlated with global mean temperature,increasing during the current warming period and decreasing during the recent cooling period prior to the mid 1960s.A synchronous relationship exists between El Nino/Southern Oscillation and snowy winter in China. The year-to-year snow fluctuations seem to be generally out of phase with volcanic activity.The anomaly map shows that snow mass increased in high altitudes and moist regions,while it decreased in arid lowland and the southern bounda- ry zone during the warming period.The potential CO_2-induced changes in snow mass will further aggravate the regional differentiation between high mountains and lowlands,between moist and arid regions.The number of snow cover days will decrease in the northern lowlands,and snowfall will increase in the Qinghai-Xizang Plateau,high mountains,and the lower reaches of the Changjiang(Yangtze)River. |
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| Keywords: | snow mass variation spatial characteritics of snow variation trends CO_2-induced warming ENSO |
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