| Variation characteristics of sunshine duration and wind speed in the last 52 years in Wei River Basin |
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| DOI：10.7606/j.issn.1000-7601.2012.05.42 |
| Key Words: Wei River Basin sunshine duration wind speed climate change |
| Author Name | Affiliation | | JIANG Chong | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Fei | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China；
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | ZHANG Renhui | College of Urban and Environmental Sciences, North West University, Xi'an, Shaanxi 710127, China | | MU Xingmin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China；
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | LI Rui | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China；
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Based on the data of sunshine duration, wind speed collected at 23 stations from 1959 to 2010 in Wei River Basin, spatial and temporal (for annual, seasonal and monthly) variations of sunshine duration and wind speed, as well as the abrupt change characteristic were analyzed. The result showed that the sunshine duration displayed a decreasing tendency in the last 52 years with a decreasing rate of 10.13 h/10 a, while a sudden change was found in about 1973. A distinct decrease occurred in Guanzhong Plain in spatial distribution, and the decrease was most prominent in summer and winter in seasonal distribution. The annual average wind speed decreased at a rate of 0.05 m/s per 10 years, while a sudden change was found in about 1981. The decrement rate in the Guanzhong Plain and loess hilly-gully region was higher than that of other parts. The change characteristic of wind speed was double peak type. The first peak appeared usually at April and the lowest wind speed appeared usually at October. The second peak appeared usually
at November. |
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