Seasonal variations and drivers of energy fluxes and partitioning along an aridity gradient in temperate grasslands of Northern China
文献类型：期刊论文
| 作者 | Wang, Yanbing5,6; You, Cuihai6; Gao, Yanhong4; Li, Yuqiang3; Niu, Yayi3; Shao, Changliang2; Wang, Xu2; Xin, Xiaoping2; Yu, Guirui1; Han, Xingguo5,6 |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2023-11-15 |
| 卷号 | 342页码:12 |
| 关键词 | Energy partitioning Arid and semiarid grassland Aridity gradient Vegetation regulation Canopy surface conductance |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2023.109736 |
| 通讯作者 | Chen, Shiping(spchen@ibcas.ac.cn) |
| 英文摘要 | Surface energy exchange is vital because it affects microclimate, water cycle and biogeochemical processes in the canopy-atmosphere interface. In this study, seasonal variations and regulators of energy fluxes and partitioning were investigated based on a long-term eddy flux observation dataset (12 towers, 82 site-years in total) along an aridity gradient in temperate grasslands of Northern China. Our results showed that the net radiation (Rn) and all energy components, including latent heat (LE), sensible heat (H) and ground heat (G0) fluxes, presented unimodal seasonal patterns across different grassland types, with Rn and LE peaked in the middle growing season but H and G0 at the beginning of the growing season. The energy partitioning shifted from the H-dominated to the LE-dominated period accompanied vegetation phenological development, thus a U-shaped seasonal pattern of Bowen ratio (beta , H/LE) was observed. Prolonged LE-dominated period and great peak of LE flux enhanced LE/ Rn proportion and decreased beta from desert steppes to typical steppes and meadow steppes. Climate and vegetation factors co-regulated the seasonal patterns of energy fluxes and partitioning, with enhanced effects of LAI and canopy surface conductance (gc) from desert steppes to typical and meadow steppes, but a reverse pattern of land-atmosphere coupling via vegetation physiological regulation. Meanwhile, enhanced sensitivity of beta in response to variations of climate and vegetation factors was also observed with increasing aridity. Our founding highlighted the role of vegetation especially physiological regulation in determining the seasonal patterns of energy fluxes and partitioning in water-limited grasslands. Whereas, the great sensitivity of energy partitioning to vegetation changing with increasing aridity also emphasized that it is vital to pay attention to the response of energy exchange in the desert steppes to the greening trend in Northern China under future climate scenarios. |
| WOS关键词 | BALANCE CLOSURE ; INNER-MONGOLIA ; INTERANNUAL VARIATIONS ; PRIMARY PRODUCTIVITY ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; WATER-VAPOR ; STEPPE ; EVAPOTRANSPIRATION ; PHENOLOGY |
| 资助项目 | National Natural Science Founda- tion of China[U22A20559] ; National Natural Science Founda- tion of China[32071565] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA26020101] |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001088235400001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Founda- tion of China ; Strategic Priority Research Program of Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/199268]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Chen, Shiping |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res Stn, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource Res, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yanbing,You, Cuihai,Gao, Yanhong,et al. Seasonal variations and drivers of energy fluxes and partitioning along an aridity gradient in temperate grasslands of Northern China[J]. AGRICULTURAL AND FOREST METEOROLOGY,2023,342:12. |
| APA | Wang, Yanbing.,You, Cuihai.,Gao, Yanhong.,Li, Yuqiang.,Niu, Yayi.,...&Chen, Shiping.(2023).Seasonal variations and drivers of energy fluxes and partitioning along an aridity gradient in temperate grasslands of Northern China.AGRICULTURAL AND FOREST METEOROLOGY,342,12. |
| MLA | Wang, Yanbing,et al."Seasonal variations and drivers of energy fluxes and partitioning along an aridity gradient in temperate grasslands of Northern China".AGRICULTURAL AND FOREST METEOROLOGY 342(2023):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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