| 环县近60年蒸发量变化特征及影响因子分析 |
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| 引用本文： | 刘 英,周忠文,张永霞,韩晶,杜军,车向军.环县近60年蒸发量变化特征及影响因子分析[J].中国农学通报,2015,31(29):206-211. |
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| 作者姓名： | 刘 英 周忠文 张永霞 韩晶 杜军 车向军 |
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| 作者单位： | 甘肃省庆阳市气象局,甘肃省西峰国家农业气象试验站,甘肃省环县气象局,甘肃省庆阳市气象局,甘肃省西峰国家农业气象试验站,甘肃省西峰国家农业气象试验站 |
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| 基金项目： | 国家级公益性行业（气象）科研专项（重大专项）“干旱气象科学研究——我国北方干旱致灾过程及机理”(GYHY201506001)。 |
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| 摘 要： | 为了研究陆面水分循环特征以及干旱致灾过程和机理,利用甘肃环县1958—2014年的气象资料,分析环县57年来蒸发量的季节和年际变化趋势、阶段性突变特征及影响因子。结果表明:蒸发量具有明显的年际变化特征,年及四季最大蒸发量均出现在20世纪50年代后期,最小蒸发量出现在2000年后。通过相关分析发现,蒸发皿蒸发量与平均风速、平均气温和日照时数具有极显著的正相关,与相对湿度、降水量具有较显著的负相关。分析发现环县蒸发量出现减少趋势的原因主要是风速减小,其次是日照时数的减少和降水量的增加。
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| 关 键 词： | 蒸发量 变化特征 影响因子 |
| 收稿时间： | 7/6/2015 12:00:00 AM |
| 修稿时间： | 8/3/2015 12:00:00 AM |
Variation Characteristics and Influence Factors Analysis of Evaporation in Huan County in Recent 60 Years |
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| Abstract: | In order to study the land water cycle characteristics and drought disaster process and mechanism based on meteorological data in Huan County from 1958 to 2014, the seasonal and inter-annual variation trend, periodic mutation characteristics and impact factors of the 57 years were analyzed. The results showed that the inter- annual variability of evaporation was obvious, and the biggest evaporation of year and four seasons occurred in the late 1950s, the minimum evaporation appeared after 2000. The correlation analysis found that the evaporation capacity was positively correlated with average wind speed, average temperature and sunshine duration, but negatively correlated with relative humidity, precipitation. Analysis indicated that the major reason of evaporation decreasing in Huan County was the decrease of wind speed, and the second was the decrease of sunshine duration and the increase of precipitation. |
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| Keywords: | Evaporation change characteristics influence factors |
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