| The character of climate change and abruption analysis of crop growth season in Tibet in recent 46 years |
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| DOI：10.7606/j.issn.1000-7601.2008.05.50 |
| Key Words: Tibet growth season climate change abruption analysis |
| Author Name | Affiliation | | TANG Xiaoping | Tibet Climate Center, Lhasa 850001, China | | DANZENG Dunchu | Meteorologial Bureau of Tibet, Lhasa 850001, China | | GE Sang | Tibet Climate Center, Lhasa 850001, China | | ZHANG Haizhen | Tibet Climate Center, Lhasa 850001, China | | DU Jun | Tibet Climate Center, Lhasa 850001, China |
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| Abstract: |
| By using the meteorological data in main farm belts of Tibet from 1961 to 2006, the change character and trend of climatic factors in crop growth season was analyzed. And then the abrupt character was analyzed by using Fisher optimization segmentation. The results show that: except in Changdu, the average air temperature of crop growth season in farm belts of Tibet all show a prominent warming trend in the recent 46 years, and its rate is 0.09～0.31℃/10a. The precipitation has a decreasing trend from 1961 to 1980, but it has an increasing trend after 1981. The sunshine change is in opposition to precipitation, which shows an increasing trend from 1961 to 1980 and decreasing trend after 1981. The jump time is almost consistent in farm belts along rivers. The turning point of air temperature from cold to warm is in 1982, but that of precipitation and sunshine is in 1998. |
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