Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5309 |
Long-term change of potential evapotranspiration over southwest China and teleconnections with large-scale climate anomalies | |
Liu, Bingjun1,2; Chen, Xiuhong1; Li, Yuan1; Chen, Xiaohong1,2 | |
2018-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:4页码:1964-1975 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Potential evapotranspiration (PET) is a sensitive factor for atmospheric and ecological systems over southwest China which is characterized by intensive karst geomorphology and fragile environment. Based on daily meteorological data of 94 stations during 1961-2013, the spatiotemporal characteristics of PET are analysed. The changing characteristics of local meteorological factors and large-scale climatic features are also investigated to explain the potential reasons for changing PET. Study results are as follows: (1) The high-value centre of PET with a mean value of 1097 mm a(-1) locates in the south mainly resulted from the regional climatic features of higher air temperature (TEM), sunshine duration (SSD) and lower relative humidity (RHU), and the low-value centre of PET with a mean value of 831 mm a(-1) is in the northeast primarily attributed to higher RHU and weaker SSD. (2) Annual PET decreases at -10.04 mm decade(-1) before the year 2000 but increases at 50.65 mm decade(-1) thereafter, and the dominant factors of PET change are SSD, RHU and wind speed (WIN), with the relative contributions of 33.29, 25.42 and 22.16%, respectively. (3) The abrupt change of PET in 2000 is strongly dominated by large-scale climatic anomalies. The strengthened 850 hPa geostrophic wind (0.51 m s(-1) decade(-1)), weakened total cloud cover (-2.25% decade(-1)) and 500 hPa water vapour flux (-2.85% decade(-1)) have provided advantageous dynamic, thermal and dry conditions for PET over southwest China since the 21st century. |
英文关键词 | potential evapotranspiration spatiotemporal variations relative contributions meteorological variables large-scale climatic anomalies |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427011700026 |
WOS关键词 | TIBETAN PLATEAU ; PAN EVAPORATION ; WIND-SPEED ; TREND ; VARIABLES ; SENSITIVITY |
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/37044 |
专题 | 气候变化 |
作者单位 | 1.Sun Yat Sen Univ, Dept Water Resources & Environm, 135 Xingang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China; 2.Sun Yat Sen Univ, Guangdong High Educ Inst, Key Lab Water Cycle & Water Secur Southern China, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Bingjun,Chen, Xiuhong,Li, Yuan,et al. Long-term change of potential evapotranspiration over southwest China and teleconnections with large-scale climate anomalies[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(4):1964-1975. |
APA | Liu, Bingjun,Chen, Xiuhong,Li, Yuan,&Chen, Xiaohong.(2018).Long-term change of potential evapotranspiration over southwest China and teleconnections with large-scale climate anomalies.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(4),1964-1975. |
MLA | Liu, Bingjun,et al."Long-term change of potential evapotranspiration over southwest China and teleconnections with large-scale climate anomalies".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.4(2018):1964-1975. |
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