Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028371 |
The Uncertainty of Penman-Monteith Method and the Energy Balance closure Problem | |
Hao, Xingming1; Zhang, Shuhua2; Li, Weihong1; Duan, Weili1; Fang, Gonghuan1; Zhang, Ying1; Guo, Bin3 | |
2018-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:14页码:7433-7443 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Penman-Monteith (PM) method is considered the most accurate method for estimating reference crop evapotranspiration (ET0). However, the method has obvious flaws in energy balance closure. In this study, the changing trends between latent heat flux of ET0(LEp) and surface net radiation (R-n) in China were analyzed based on observational data from 800 meteorological stations. The results showed that the multiyear average ratio of LEp/R-n was highest in the warm temperate zone and was lowest in the subfrigid zone of the Tibetan Plateau. Correspondingly, the values of LEp/R-n in these areas were ranged from 1.138 to 0.647. At the site scale, there were 61, 178, and 170 meteorological stations with daily average LEp/R-n values >1 during three periods (from January to April, May to August, and September to December, respectively). The ratio of LEp/R-n showed an obvious surface energy imbalance, and it was extremely obvious in northern China. Meanwhile, it is found that there was also great uncertainty of the ET0, which estimated based on the calculated and measured net radiation. In general, the uncertainty of ET0 was ranged from -0.955 to 1.028 mm/day and the average value of uncertainty was 0.154 mm/day. The uncertainty also showed obviously temporal variation, which was lower during April to October, but was higher in other times. The main cause of the energy balance closure problem was the overestimation of the aerodynamic component of ET0. In view of such situation, this study suggested the two ways to estimate ET0 for different regions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441965400024 |
WOS关键词 | ESTIMATING REFERENCE EVAPOTRANSPIRATION ; POTENTIAL EVAPOTRANSPIRATION ; EVAPORATION ; SENSITIVITY ; TRENDS ; EQUATION ; FOREST ; WATER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33078 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi, Peoples R China; 2.Nanjing Univ, Dept Geog Informat Sci, Nanjing, Jiangsu, Peoples R China; 3.Shandong Univ Sci & Technol, Coll Geodesy & Geometr, Qingdao, Peoples R China |
推荐引用方式 GB/T 7714 | Hao, Xingming,Zhang, Shuhua,Li, Weihong,et al. The Uncertainty of Penman-Monteith Method and the Energy Balance closure Problem[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(14):7433-7443. |
APA | Hao, Xingming.,Zhang, Shuhua.,Li, Weihong.,Duan, Weili.,Fang, Gonghuan.,...&Guo, Bin.(2018).The Uncertainty of Penman-Monteith Method and the Energy Balance closure Problem.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(14),7433-7443. |
MLA | Hao, Xingming,et al."The Uncertainty of Penman-Monteith Method and the Energy Balance closure Problem".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.14(2018):7433-7443. |
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