| 汪治桂，王素萍,王建兵， 高晓清.黄河源区近40年参考作物蒸散量变化特征研究[J].干旱地区农业研究,2013,31(6):169~173 |
| 黄河源区近40年参考作物蒸散量变化特征研究 |
| Study on the variation characteristics of reference crop evapotranspiration in recent 40 years in source region of Yellow River |
| |
| DOI：10.7606/j.issn.1000-7601.2013.06.030 |
| 中文关键词: 参考作物蒸散量（ET0） 空间分布 年季变化 年内变化 黄河源区 |
| 英文关键词:reference crop evapotranspiration(ET0) spatial distribution annual and seasonal change variation within the year source region of Yellow River |
| 基金项目:中国科学院寒旱区陆面过程与气候变化重点实验室开放基金“黄河源区气候变化的分析研究”资助 |
|
| 摘要点击次数: 1409 |
| 全文下载次数: 1208 |
| 中文摘要: |
| 选取位于黄河源区10个气象台站1971—2010年观测资料，运用彭曼—蒙蒂斯公式计算出各站参考作物蒸散量（ET0）。通过数学统计、相关分析、小波分析等方法对黄河源区ET0分别作了空间分布、年内变化和年变化等特征分析，结果发现源区ET0空间分布不均匀，呈现西北部大于东南部。年内ET0逐月变化表现为典型的单峰型；源区ET0的四季分布差异较大，夏季蒸散量最大，冬季最小，春、秋季次之。各季节ET0与气温和日照呈显著正相关，而与降水量和相对湿度呈明显负相关。ET0年际变化为逐年波动式上升趋势，整个源区年平均ET0以6.1 mm·10a-1的气候倾向率逐年增大。40 a间ET0曾出现过两次较为明显的准周期变化，分别在20世纪70年代中期至80年代中期，约为准8 a周期，1990年以后基本表现为准5 a周期变化。 |
| 英文摘要: |
| Based on the measured data of 10 meteorological stations from 1971 to 2010 in source region of Yellow River, utilized the Penman-Monteith Formula to calculate the reference crop vapotranspiration(ET0）for each station. Through several methods as mathematical statistic， correlation analysis and wavelet analysis to do the characteristic analysis by s
patial distribution， variation within the year and annual change respectively, for the ET0 values in source region of Yellow River, the results showed that: The ET0 in source region of Yellow River were space uneven distributed, appeared the northwest region more than the southeast region. The monthly variation of showed a typical single peak，also the distribution of ET0 in four seasons appeared big difference. The ET0 in summer was maximum and minimum in winter, secondary in spring and autumn. The ET0 in each season presented a positive correlation with th temperature and sunshine hours, but significent negative correlation with the precipitation and relative humidity. The annual ET0 presented an increasing trend year by year, the yearly ET0 was average increased 6.1 mm·10a-1 in whole source region. During t
he 40 years, the ET0 has appeared two times significent cyclic change as in middle of seventy to metaphase of eighty, almost the cycle was 8 years, but after the 1990, it was basiclly expressed the changing cycle of 5 years. |
| 查看全文 查看/发表评论 下载PDF阅读器 |