| Characteristics of agricultural climate resources’changing in dry area of Hexi corridor |
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| DOI：10.7606/j.issn.1000-7601.2008.03.03 |
| Key Words: agricultural climate resources characteristic of changing abrupt change Mann－Kendall testing |
| Author Name | Affiliation | | GUO Liangcai | Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province Institute of Arid Meteorology China Meteorology Administration, Lanzhou 730020,China；Jiuquan Meteorological Bureau,Jiuquan,Gansu 735000,China | | YUE Hu | Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province Institute of Arid Meteorology China Meteorology Administration, Lanzhou 730020,China | | WANG Qiang | Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province Institute of Arid Meteorology China Meteorology Administration, Lanzhou 730020,China | | WANG Yaoxi | Jiuquan Meteorological Bureau,Jiuquan,Gansu 735000,China |
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| Abstract: |
| According to the climate data observed by 19weather stations in Hexi corridor from 1960 to 2005 the annual and seasonal agricultural climate resources including light heat and water and so on are diagnostically analyzed by using the method of climate changing tendency and the abrupt changes of critically agricultural resources factors are analyzed by approach of Mann-Kendall．The research reveals that in recent 46 years the temperature in Hexi corridor rose smoothly thereby abundant heat resources especially average minimum temperature rose obviously；the increasing amplitude of winter is larger than that of other seasons；however the gross increasing amplitude is lower than the average level of whole China；the heat resources abruptly changed in1990s’．The amount of precipitation varied gently while tending to slightly increase and relating obviously to seasons－ the increase of summer precipitation contributes remarkably．Since1960s’ vaporizing potential close relating to the precipitation tended to ascend and abruptly changed to rapidly increase；the difference between precipitation and vaporization decreased slowly since1970s’without abrupt change．The solar radioactivity and sunshine hours tend identically to increase and their various tendencies are all positive；from aspects of regional distribution the number of oasis in north and middle of the corridor increased dramatically． The total agricultural climate changing-characteristics include temperature’s rising precipitation’s slightly increasing and sunshine hours’increasing．Finally the chief influence brought by the change of agricultural climate resources to agricultural production in Hexi corridor is discussed and analyzed. |
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