Including soil water stress in process-based ecosystem models by scaling down maximum carboxylation rate using accumulated soil water deficit
文献类型：期刊论文
| 作者 | Chen, Bin2; Chen, Jing M.3,4; Baldocchi, Dennis D.5; Liu, Yang2; Wang, Shaoqiang2 ; Zheng, Ting1; Black, T. A.6; Croft, Holly7
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| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
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| 出版日期 | 2019-10-15 |
| 卷号 | 276页码:17 |
| ISSN号 | 0168-1923 |
| 关键词 | Ball-Woodrow-Berry slope Accumulated soil water deficit Penman-monteith equation Two-leaf model Canopy conductance |
| DOI | 10.1016/j.agrformet.2019.107649 |
| 通讯作者 | Chen, Bin(chenbin@igsnrr.ac.cn) ; Chen, Jing M.(jing.chen@utoronto.ca) |
| 英文摘要 | The impacts of soil water stress on photosynthesis and stomatal conductance have not been uniformly parameterized in terrestrial ecosystem models. This study firstly quantifies diurnal variations in canopy conductance (g(c,w)) during full-leaf periods from eddy covariance flux data at four flux sites by inverting the Penman-Monteith equation. Then, the Ball-Woodrow-Berry (BWB) slopes were derived and compared under contrasting water stress conditions by linear regression of g(c,w) and gross primary productivity (GPP) derived from EC measurements. Finally, the response of the leaf maximum carboxylation rate to accumulated soil water deficit (ASWD) was explored to develop a better scheme of soil water stress. Our results show: (1) The thresholds of relatively available soil moisture under which soil water stress occurs were 0.575, 0.885, 0.495 and 0.653 for the tropical savanna site (AU-How), the Mediterranean forest site (IT-Col), the Mediterranean grassland site (US-Var) and the boreal forest site (CA-Oas), respectively, derived from the logistic functions of fitting g(c, w) to relatively available soil moisture; (2) similar to previous work, we found that ensemble average g(c, w) of dry periods were lower than those of wet periods at the studied sites, and that BWB slopes did not change significantly during droughts, indicating that BWB slopes may be conserved under prolonged drought; and (3) EC-derived GPP gradually decreased with the increase of ASWD, which can be well captured by a V-mr-ASWD scheme developed in this study. In sum, the V-mr-ASWD scheme would increase the accuracy of GPP simulations of ecosystem models. This study suggests that the change of BWB slopes under prolonged drought is not justified according to the experimental data examined while adjusting V-cmax with ASWD accounts for the change in leaf physiology due to prolonged drought and is computationally feasible and efficient. |
| WOS关键词 | BOREAL ASPEN FOREST ; CARBON-DIOXIDE EXCHANGE ; LEAF-AREA INDEX ; STOMATAL CONDUCTANCE ; CANOPY CONDUCTANCE ; GAS-EXCHANGE ; BIOCHEMICAL LIMITATIONS ; MESOPHYLL CONDUCTANCE ; SEASONAL-VARIATION ; VAPOR EXCHANGE |
| 资助项目 | National Key Research and Development Program from Ministry of Science and Technology of People's Republic of China[2016YFB0501501] ; National Key Research and Development Program from Ministry of Science and Technology of People's Republic of China[2016YFA0600202] ; National Natural Science Foundation of China[41503070] |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000500195900036 |
| 资助机构 | National Key Research and Development Program from Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/130516]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Chen, Bin; Chen, Jing M. |
| 作者单位 | 1.Univ Wisconsin, Dept Forest & Wildlife Ecol, Madison, WI 53706 USA 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing, Jiangsu, Peoples R China 4.Univ Toronto, Dept Geog & Planning, Toronto, ON, Canada 5.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Ecosyst Sci Div, 151 Hilgard Hall, Berkeley, CA 94720 USA 6.Univ British Columbia, Agroecol, Vancouver, BC V6T 1Z4, Canada 7.Univ Sheffield, Dept Anim & Plant Sci, Western Bank, Sheffield S10 2TN, S Yorkshire, England |
| 推荐引用方式 GB/T 7714 | Chen, Bin,Chen, Jing M.,Baldocchi, Dennis D.,et al. Including soil water stress in process-based ecosystem models by scaling down maximum carboxylation rate using accumulated soil water deficit[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,276:17. |
| APA | Chen, Bin.,Chen, Jing M..,Baldocchi, Dennis D..,Liu, Yang.,Wang, Shaoqiang.,...&Croft, Holly.(2019).Including soil water stress in process-based ecosystem models by scaling down maximum carboxylation rate using accumulated soil water deficit.AGRICULTURAL AND FOREST METEOROLOGY,276,17. |
| MLA | Chen, Bin,et al."Including soil water stress in process-based ecosystem models by scaling down maximum carboxylation rate using accumulated soil water deficit".AGRICULTURAL AND FOREST METEOROLOGY 276(2019):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
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