J4 ›› 2004, Vol. 22 ›› Issue (4): 26-28.

• 论文 • 上一篇    下一篇

半干旱雨养农田典型晴天感热、潜热的阶段差异

王润元1,杨兴国1,把多辉2,王 胜1
  

  1. (1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃兰州 730020;
    2.天水市气象局,甘肃天水 741018)
  • 收稿日期:2004-08-27 修回日期:2004-09-27 出版日期:2004-12-31 发布日期:2004-12-31
  • 作者简介:王润元(1965—),男,甘肃西和人,副研究员,主要从事干旱气象及生态气候资源开发研究.
  • 基金资助:

    国家自然科学基金项目(40205005)资助.

Analysis of Temperature Change Characteristic during50years in Urumqi Airport

 WANG Run-Yuan1, YANG Xin-Guo1, BA Che-Hui2, WANG  Qing1   

  1. (Meteorological Centre of Xingjiang Air Traffic Administration,Urumqi 830016,China)
  • Received:2004-08-27 Revised:2004-09-27 Online:2004-12-31 Published:2004-12-31

摘要:

利用野外试验观测资料,就西北地区东部半干旱雨养农田典型晴天感热、潜热在作物不同生长时段的变化特征进行初步的探讨。结果表明:在作物不同生长阶段,我国西北地区东部半干旱雨养农田典型晴天的感热、潜热日变化特点基本相似,均表现为单峰型变化特征。从春季到夏季,感热的阶段变化表现为增加的趋势,而潜热的阶段变化与晴天前期的降水变化基本一致,呈波动趋势。在农田的地气能量交换中,植被的影响为主导因素时,主要表现为潜热交换方式,太阳辐射的影响为主导因素时主要表现为感热交换方式。农田典型晴天波恩比的阶段变化与晴天前期降水量的阶段变化有
较好的反对应关系。降水的季节变化基本决定了农田水分的季节变化。

关键词: 半干旱农田, 感热, 潜热, 日变化

Abstract:

Based on the mean monthly, maximum and minimum temperature series, the temperature changing characteristics in
Urumqi airport in recent 50 years were analyzed in this paper. The results show that the mean annual temperature trends was 0.033
℃/a, and there were obvious warming trends in spring, autumn and winter, the temperature tendency rate was 0.0949℃/a in
winter, which was the largest. But the temperature in summer was dropping by the rate of 0.028℃/a. In recent 50 years, there
were cold- warm- cold- warm evolution processes in Urumqi airport. A long cold period was in 1950s which was obvious in four
seasons, a warm period was from 1961 to 1975, the second cold period was from 1976 to 1988, another warm period was from 1989
to 2000. 70% of anomalous cold years (seasons) were in 1950s and 41% anomalous warm years (seasons) were in 1990s. The mean
annual maximum and minimum temperatures presented obviously increasing trend, and the latter was much steadier. From the results
it is known that the minimum temperature would be more sensitive to monitor the intensity of greenhouse.From 1989 to 2000,abrupt
warming occurred mainly in nighttime.These facts would contribute to study the temperature change in Urumqi airport.

Key words: temperature, changing trend, inclination rate

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