Classification-Based Spatiotemporal Variations of Pan Evaporation Across the Guangdong Province, South China

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• 作者：Yanhu He ; Kairong Lin ; Xiaohong Chen ; Changqing Ye ; Lei Cheng
• 关键词：Pan evaporation ; Spatiotemporal variations ; Classification ; Climatic factor ; Guangdong province
• 刊名：Water Resources Management
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：29
• 期：3
• 页码：901-912
• 全文大小：1,238 KB
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• 作者单位：Yanhu He (1) (2)
  Kairong Lin (1) (2)
  Xiaohong Chen (1) (2)
  Changqing Ye (3)
  Lei Cheng (4)
  
  1. Department of Water Resources and Environment, Geography and Planning School, Sun Yat-sen University, 135 Xingangxi Road, Guangzhou, 510275, People’s Republic of China
  2. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong Higher Education Institutes, Guangzhou, 510275, China
  3. College of Environment and plant protection, Hainan University, Haikou, 570228, China
  4. Water for a Healthy Country Flagship, CSIRO Land and Water, Canberra, ACT, Australia
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Hydrogeology
  Geotechnical Engineering
  Meteorology and Climatology
  Civil Engineering
  Environment
  
• 出版者：Springer Netherlands
• ISSN：1573-1650

文摘

Change in pan evaporation (Epan) has evoked general scientific interest because it involves both climatic and hydrological effects. The enhanced greenhouse effect may be the casual factor, although the mechanism still needs to be further confirmed. Based on meteorological data (Pan evaporation, rainfall, air temperature, sunshine duration, relative humidity, wind speed, cloud cover, and water vapor pressure) of 85 sites from 1957 to 2006, classification-based spatiotemporal variations of pan evaporation and possible causes were studied in the Guangdong province, South China (with a coastline of 8,500?km), which is one of China’s most prosperous provinces with the largest population. The Guangdong province was spatially divided into 4 parts, i.e., Southwest part, East part, Central part, and Northwest part, according to Epan and seven other climatic factors based on cluster analysis. Results showed that pan evaporation in this study area declined ?.35?mm year? on average in time, and mainly decreased from the seashore area to the inland area in space. Results also showed that all the climatic factors can contribute to change in Epan, but their contributions were different over the space. Sunshine duration (SD) and wind speed (WS) had a positive correlation with Epan, while rainfall (R) and air temperature (Ta) were negatively correlated to Epan. Among all the 7 climatic factors, SD was identified as the dominant driving force of Epan change in the Guangdong province.