主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2011, Vol. 27 ›› Issue (1): 40-44.doi:

• 简报 • 上一篇    下一篇

1957—2009年南澳蒸发量变化特征及影响因子

林苗青1 杜勤博1 翁武坤2   

  1. 1.南澳县气象局,广东 南澳  515900;2.汕头市气象局,广东 汕头  515041
  • 收稿日期:2010-06-28 修回日期:2010-10-14 出版日期:2011-02-28 发布日期:2011-02-28

Evaporation characteristics and its influencing factor from 1957 to 2009 in Nan’ao County, Guangdong province

LIN Miao-qing1 DU Qin-bo1  WENG Wu-kun2   

  1. 1. Nan’ao Meteorological Bureau, Nanao 515900, China; 2. Shantou Meteorological Bureau, Shantou 515041, China
  • Received:2010-06-28 Revised:2010-10-14 Online:2011-02-28 Published:2011-02-28

摘要: 利用1957—2009年南澳县小型蒸发皿蒸发量资料,分析了南澳蒸发量的气候变化趋势。结果表明:南澳10月蒸发量最大,2月蒸发量最少;秋季蒸发量最大,夏季次之,冬季最少。1957-2009年蒸发量呈明显下降趋势,20世纪60—90年代基本上是锐减,21世纪的第1个10a反而上升,平均以7.2 mm/年的趋势下降;11月减幅最大,7月减幅最小;冬季减幅最大,秋季次之,夏季最小;对蒸发量下降的原因分析表明,日照时数和平均风速的减少与蒸发量的减少呈显著相关,是蒸发量减少的主要影响因子;低云量的增多也导致日照时数的减少;低云量、总云量、相对湿度、降雨量、水汽压与蒸发量呈负相关关系,其中低云量、总云量与蒸发量负相关显著。

关键词: 蒸发量, 变化特征, 影响因子, 南澳县

Abstract: Based on evaporation data from a small evaporation pan in Nan’ao County from 1957 to 2009, the climate variation characteristics of evaporation in Nan’ao were analyzed. The results show that the maximum and the minimum evaporation appear in October and February, respectively. Among the four seasons, the highest evaporation is in autumn, second in summer, and the lowest in winter. The evaporation trend decreases clearly from 1957 to 2009 with an average rate of 7.2 mm per year, especially during the period of 1960s to 1990s, while it increases in the first decade of 21st century. The maximum decreasing amplitude of evaporation is in November and the minimum is in July for monthly variation, while the maximum is in winter, then in autumn and the minimum in summer for seasonal variation. On the other hand, the analysis indicates that the decrease of sunshine duration and average wind speed are related to that of evaporation, and they are the mainly influencing factors causing the decrease of evaporation. Furthermore, the increase of low cloud cover also leads to the decrease of sunshine duration. Evaporation has negative correlations with relative humidity, precipitation and water vapor pressure, especially with low and total cloud cover.

Key words: Evaporation, Variation, Influencing factor, Nan’ao County

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