| Responses of climate-productivity to climatic change in central Tibet from1961 to 2005 |
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| DOI：10.7606/j.issn.1000-7601.2008.01.26 |
| Key Words: climate-productivity climatic change central Tibet |
| Author Name | Affiliation | | DU Jun | Tibet Climate Center, Lhasa 850001, China | | HU Jun | Lhasa Meteorological Bureau, Lhasa 850001, China | | ZHOU Baoqin | Meteorological Bureau of Nyingtri District in Tibet, Nyingtri 860000, China | | LIU Yilan | Tibet Climate Center, Lhasa 850001, China | | ZUO Huilin | Tibet Meteorological Bureau, Lhasa 850001, China |
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| Abstract: |
| Based on the 9 meteorological stations' data of annual mean temperature and precipitation in central Tibet from 1961 to 2005,the data of the crop climatic productivity (Pv) are computed by Thornthwaite Memoriai Model.The spatial distribution and variation of the Pv are analyzed,and the responses of Pv to climate change are discussed.The results show that the trend of Pv indicate a decrease of 376.0 kg/(hm2·10a) in 22 years from 1961～1982,but it shows distinct increasing tendency from 1983 to 2005 and increased by 682.6 kg/(hm2·10a).On an average in central Tibet,the cold and wet climate occurred in the 1960s,the Pv is positive anomaly.The when it is dry with less rain in the 1980s,the Pv is the lowest among the past 45 years,and during the warm and wet climate in the 1990s,the Pv is the highest.Under climate change scenarios,the warm and wet climate would benefit the Pv with an average increase of yield by 11.62% in central Tibet,while the cold and dry climate would have an adverse impact on Pv with an average decrease of yield by 12.13%.It can be deduced from existent research that the concerning temperature and precipitation trend in central Tibet belongs to the warm and wet climate trend which would increase the Pv and is advantageous especially for improving eco-environment. |
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