| 气象因素对民勤地区参考作物腾发量变化的贡献分析 |
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| 引用本文： | 黄悦,李思恩.气象因素对民勤地区参考作物腾发量变化的贡献分析[J].中国农业大学学报,2021,26(5):118-128. |
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| 作者姓名： | 黄悦 李思恩 |
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| 作者单位： | 中国农业大学 水利与土木工程学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金面上项目(51879262) |
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| 摘 要： | 利用世界粮农组织的Penman-Monteith方法以及敏感曲线分析法,对甘肃国家级地面站点民勤站1968—2018年来的参考作物腾发量和气象因素的变化规律及各气象因子对参考作物腾发量变化的贡献大小进行了研究。结果表明:1)民勤站参考作物腾发量ET0年内变化特征呈抛物线形式,在1—5月增加,8—12月递减,7月达到最大值为5.29mm/d,年际变化整体呈波动上升趋势;2)利用相关性分析与主成分分析发现ET0与平均最高气温Tmax、平均饱和水汽压差VPD的相关性最大,利用偏相关性分析发现ET0与平均风速U、平均净辐射与土壤热通量的差Rn-G的相关性最小,但ET0与U、Rn-G的偏相关性较大,说明ET0与U、Rn-G的关系受其他气象因素的影响较大;3)气象因素的年内变化与ET0对各气象因素的敏感系数在年内的变化趋势有一定的相似度。ET0对Rn-G的敏感系数不大,但是由于Rn-G自身的增长幅度较大,导致Rn-G对ET0增长的贡献率最大;平均气温T和VPD对ET0的增长也产生了一定的贡献;U对ET0的增长产生了较大的负贡献。
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| 关 键 词： | 参考作物腾发量 Penman-Monteith公式 敏感性分析 |
| 收稿时间： | 2020/9/27 0:00:00 |
Contribution analysis of meteorological factors on the variation of reference crop evapotranspiration in Minqin area |
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| HUANG Yue,LI Sien.Contribution analysis of meteorological factors on the variation of reference crop evapotranspiration in Minqin area[J].Journal of China Agricultural University,2021,26(5):118-128. |
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| Authors: | HUANG Yue LI Sien |
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| Institution: | College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China |
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| Abstract: | By using the Penman-Monteith method recommended by FAO and the sensitive curve analysis method, the reference crop evapotranspiration, change law of meteorological factors and contribution of meteorological factors to the change of reference crop evapotranspiration over from 1968 to 2018 of Minqin Station in Gansu National Ground Station were studied. The results showed that: 1)In Minqin Station, the variation characteristics of ET0 in a year showed a parabolic form, which increases from January to May, decreased from August to December, and reached the maximum value of 5. 29 mm/d in July. The annual change of ET0 displayed a trend of fluctuation and increase. 2)Correlation analysis and principal component analysis showed that ET0 had the greatest correlation with Tmax and VPD. By using partial correlation analysis, it was found that the correlation between ET0 and U, Rn-G is the smallest, and the partial correlation between ET0 and U, Rn-G was relatively large, indicating that the relation between ET0 and U, Rn-G was greatly affected by other meteorological factors. 3)The variation trend of meteorological factors was similar to that of the sensitivity coefficient of meteorological factors. The sensitivity coefficient of ET0 to Rn-G was not large. However, due to the large growth range of Rn-G itself, the contribution rate of ET0 to Rn-G was the largest. T and VPD also contributed to the growth of ET0. U had a large negative contribution to the growth of ET0. |
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| Keywords: | reference crop evaporation Penman-Monteith equation sensitivity analysis |
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