文献类型：期刊文献

英文题名：Surface energy partitioning and evapotranspiration in a Pinus tabuliformis plantation in Northeast China

作者：Gao, Xiang[1,2,3] Zhang, Jinsong[1,2,3] Cai, Jinfeng[2] Pei, Songyi[4] Liu, Linqi[1,2,3] Meng, Ping[1,2,3] Huang, Hui[1,2,3]

第一作者：Gao, Xiang;高翔

通信作者：Zhang, JS[1];Zhang, JS[2];Zhang, JS[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Beijing, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry Southe, Nanjing, Peoples R China;[3]Henan Xiaolangdi Earth Crit Zone Natl Res Stn Midd, Jiyuan, Peoples R China;[4]State Owned Jianping Cty Heishui Mechanized Forest, Chaoyang, Peoples R China

年份：2023

卷号：14

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000940149600001)】；

基金：This project was supported financially by the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF (CAFYBB2022SY001, CAFYBB2018ZA001).

语种：英文

外文关键词：surface energy partitioning; evapotranspiration; surface parameters; Pinus tabuliformis plantation; Northeast China

摘要：Examining the land-atmosphere interaction in vegetation rehabilitation areas is important for better understanding of land surface processes affected by human activities. In this study, energy flux observations were used to investigate surface energy partitioning and evapotranspiration (ET) in a Pinus tabuliformis plantation in Northeast China in 2020 and 2021. The sensible heat flux (H) was the dominant component of R-n, and the ratio of H to the latent heat flux was higher than 1 at all growth stages. The two most important factors influencing the midday evaporative fraction and daily ET were the normalized difference vegetation index (NDVI) and soil water content at 10 cm depth (SWC10). Cumulative precipitation (P) minus ET was 62.83 and 239.90 mm in 2020 (annual P of 435.2 mm) and 2021 (annual P of 632.8 mm), respectively. The midday Priestley-Taylor coefficient (alpha), surface conductance (g(s)), and decoupling coefficient increased gradually from the onset of the mid-growing stage and decreased from the later growing stage. Midday alpha and g(s) increased with NDVI and SWC10 increasing until the NDVI (0.5) and SWC10 (0.17 mm(3) mm(-3)) thresholds were reached, respectively. Midday alpha and g(s) were significantly influenced by vapor pressure deficit below 3 kPa, and the threshold value of midday g(s) was approximately 12 mm s(-1). In conclusion, this Pinus tabuliformis plantation regulated surface energy partitioning properly, and left a part of P for surface runoff and groundwater recharge in the semiarid region of Northeast China.