scholarly journals Comparison of three evapotranspiration models with eddy covariance measurements for a Populus euphratica Oliv. forest in an arid region of northwestern China

2015 ◽  
Vol 8 (1) ◽  
pp. 146-156 ◽  
Author(s):  
Guanlong Gao ◽  
Xiaoyou Zhang ◽  
Tengfei Yu ◽  
Bing Liu
Keyword(s):  
Eddy Covariance ◽  
Arid Region ◽  
Populus Euphratica ◽  
Northwestern China ◽  
Eddy Covariance Measurements ◽  
Populus Euphratica Oliv

scholarly journals Stomatal and non-stomatal limitations to photosynthesis of Populus euphratica Oliv. leaves in an extremely arid area of northwestern China

2019 ◽  
Author(s):  
Guanlong Gao ◽  
Qi Feng ◽  
Xiande Liu
Keyword(s):  
Leaf Gas Exchange ◽  
Populus Euphratica ◽  
Net Photosynthesis ◽  
Distribution Patterns ◽  
Northwestern China ◽  
Stomatal Limitation ◽  
Natural Conditions ◽  
Growing Seasons ◽  
Populus Euphratica Oliv ◽  
Stomatal Limitations

Abstract On the basis of successive measurements of leaf gas exchange during the main growing seasons of Populus euphratica Oliv. in 2013 and 2014, respectively, we analyzed the stomatal and non-stomatal limitations to photosynthesis under natural conditions in an extremely arid region of northwestern China. Our results showed that (1) the distribution patterns of net photosynthesis (Pn) and stomatal conductance (gs) were similar, both of which increased in the morning, peaked at around noon, and then decreased. This contrasted with the observed changes in sub-stomatal CO2 concentrations (Ci). (2) The phenomenon of midday depression of photosynthesis (MDP) was obvious from July to September during the two years. At the beginning of MDP, the stomatal limitation to photosynthesis (Ls) peaked, where its predominance was supported by Ci being at a minimum. Thereafter, Ls decreased and Ci/gs increased sharply, indicating that the non-stomatal limitation to photosynthesis predominated. (3) Both the Ls and relative stomatal limitation to photosynthesis (RLs) increased in the morning, and then decreased, whereas Ci/gs presented contrary changes. (4) The RLs values were greater than the Ls values, which was mainly due to the nonlinearity of the Pn/Ci curve, which often leads to large overestimations. (5) The Ls values in our study were much greater than those from other studies under natural conditions. The most probable reason was that the extremely high temperature and scarce water resource caused the stomata to close to reduce transpiration, resulting in the stomatal limitation to photosynthesis being more intense.

scholarly journals Preserving the variance in imputed eddy-covariance measurements: Alternative methods for defensible gap filling

2017 ◽  
Vol 232 ◽  
pp. 635-649 ◽  
Author(s):  
Sujit Kunwor ◽  
Gregory Starr ◽  
Henry W. Loescher ◽  
Christina L. Staudhammer
Keyword(s):  
Eddy Covariance ◽  
Alternative Methods ◽  
Gap Filling ◽  
Eddy Covariance Measurements

Linear trend and abrupt changes of climate indices in the arid region of northwestern China

2017 ◽  
Vol 196 ◽  
pp. 108-118 ◽  
Author(s):  
Huaijun Wang ◽  
Yingping Pan ◽  
Yaning Chen ◽  
Zhengwei Ye
Keyword(s):  
Arid Region ◽  
Linear Trend ◽  
Northwestern China ◽  
Climate Indices ◽  
Abrupt Changes

Application of an alternative method to derive reliable estimates of nighttime respiration from eddy covariance measurements in moderately complex topography

2008 ◽  
Vol 148 (6-7) ◽  
pp. 1174-1180 ◽  
Author(s):  
Eva van Gorsel ◽  
Ray Leuning ◽  
Helen A. Cleugh ◽  
Heather Keith ◽  
Miko U.F. Kirschbaum ◽  
...  
Keyword(s):  
Eddy Covariance ◽  
Complex Topography ◽  
Alternative Method ◽  
Eddy Covariance Measurements

Runoff responses to climate change in arid region of northwestern China during 1960–2010

2013 ◽  
Vol 23 (3) ◽  
pp. 286-300 ◽  
Author(s):  
Huaijun Wang ◽  
Yaning Chen ◽  
Weihong Li ◽  
Haijun Deng
Keyword(s):  
Climate Change ◽  
Arid Region ◽  
Northwestern China

Multi-year eddy covariance measurements of net ecosystem exchange in tropical dry deciduous forest of India

2021 ◽  
Vol 301-302 ◽  
pp. 108351
Author(s):  
Suraj Reddy Rodda ◽  
Kiran Chand Thumaty ◽  
MSS Praveen ◽  
Chandra Shekhar Jha ◽  
Vinay Kumar Dadhwal
Keyword(s):  
Eddy Covariance ◽  
Deciduous Forest ◽  
Net Ecosystem Exchange ◽  
Dry Deciduous Forest ◽  
Eddy Covariance Measurements

Simulation of transpiration for typical xeromorphic plants in inland arid region of Northwestern China

2021 ◽  
Vol 41 (19) ◽  
Author(s):  
张阳阳，陈喜，高满，刘秀强 ZHANG Yangyang
Keyword(s):  
Arid Region ◽  
Northwestern China
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