TY - JOUR
T1 - Simulation of canopy CO2/H2O fluxes for a rubber (Hevea brasiliensis) plantation in central Cambodia
T2 - The effect of the regular spacing of planted trees
AU - Kumagai, Tomo'omi
AU - Mudd, Ryan G.
AU - Miyazawa, Yoshiyuki
AU - Liu, Wen
AU - Giambelluca, Thomas W.
AU - Kobayashi, Nakako
AU - Lim, Tiva Khan
AU - Jomura, Mayuko
AU - Matsumoto, Kazuho
AU - Huang, Maoyi
AU - Chen, Qi
AU - Ziegler, Alan
AU - Yin, Song
N1 - Funding Information:
This study was conducted primarily under the project “Estimation and simulation of carbon stock change of tropical forest in Asia (2011–2014)” funded by the Ministry of Agriculture, Forestry and Fisheries, Japan . Also, this study was supported by in part by a Grant-in-Aid for Scientific Research (# 23405028 ) and the granted project “Program for risk information on climate change” from the Ministry of Education, Science and Culture, Japan. Participation of RGM, WL, TWG, MH, and QS was supported by NASA grants NNG04GH59G and NNX08AL90G . MH was supported by the US Department of Energy (DOE) Biological and Environmental Research (BER) Earth System Modeling (ESM) program. Pacific Northwest National Laboratory (PNNL) is operated for the US DOE by Battelle Memorial Institute under Contract DE-AC05-76RL01830. ADZ was supported by National University of Singapore (NUS) grant R-109-000-092-133 and Asia-Pacific Network for Global Change Research (APN) grant #ARCP2008-01CMY .
Funding Information:
This study was initiated as cooperative project between Cambodian Rubber Plantation Department, Cambodian Rubber Research Institute (CRRI), University of Hawai‘i, and Kyushu University, supported by the Global COE (Centers of Excellence) Program (GCOE) of the Japan Society for the Promotion of Science (JSPS) and a grant from Kyushu University . We acknowledge help given by the staff of CRRI and other contributors, including Hiroki Tanaka, Tsuyoshi Kajisa, Khun Kakada, Nobuya Mizoue, Makiko Tateishi, and Tetsukazu Yahara.
PY - 2013/9/10
Y1 - 2013/9/10
N2 - We developed a soil-vegetation-atmosphere transfer (SVAT) model applicable to simulating CO2 and H2O fluxes from the canopies of rubber plantations, which are characterized by distinct canopy clumping produced by regular spacing of plantation trees. Rubber (Hevea brasiliensis Müll. Arg.) plantations, which are rapidly expanding into both climatically optimal and sub-optimal environments throughout mainland Southeast Asia, potentially change the partitioning of water, energy, and carbon at multiple scales, compared with traditional land covers that are being replaced. Describing the biosphere-atmosphere exchange in rubber plantations via SVAT modeling is, therefore, important to understanding the impacts on environmental processes. The regular spacing of plantation trees creates a peculiar canopy structure that is not well represented in most SVAT models, which generally assume a non-uniform spacing of vegetation. Herein we develop a SVAT model applicable to a rubber plantation and an evaluation method for its canopy structure, and examine how the peculiar canopy structure of rubber plantations affects canopy CO2 and H2O exchanges. Model results are compared with measurements collected at a field site in central Cambodia. Our findings suggest that it is crucial to account for intensive canopy clumping in order to reproduce observed rubber plantation fluxes. These results suggest a potentially optimal spacing of rubber trees to produce high primary productivity and water use efficiency.
AB - We developed a soil-vegetation-atmosphere transfer (SVAT) model applicable to simulating CO2 and H2O fluxes from the canopies of rubber plantations, which are characterized by distinct canopy clumping produced by regular spacing of plantation trees. Rubber (Hevea brasiliensis Müll. Arg.) plantations, which are rapidly expanding into both climatically optimal and sub-optimal environments throughout mainland Southeast Asia, potentially change the partitioning of water, energy, and carbon at multiple scales, compared with traditional land covers that are being replaced. Describing the biosphere-atmosphere exchange in rubber plantations via SVAT modeling is, therefore, important to understanding the impacts on environmental processes. The regular spacing of plantation trees creates a peculiar canopy structure that is not well represented in most SVAT models, which generally assume a non-uniform spacing of vegetation. Herein we develop a SVAT model applicable to a rubber plantation and an evaluation method for its canopy structure, and examine how the peculiar canopy structure of rubber plantations affects canopy CO2 and H2O exchanges. Model results are compared with measurements collected at a field site in central Cambodia. Our findings suggest that it is crucial to account for intensive canopy clumping in order to reproduce observed rubber plantation fluxes. These results suggest a potentially optimal spacing of rubber trees to produce high primary productivity and water use efficiency.
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U2 - 10.1016/j.ecolmodel.2013.06.016
DO - 10.1016/j.ecolmodel.2013.06.016
M3 - Article
AN - SCOPUS:84880341111
VL - 265
SP - 124
EP - 135
JO - Ecological Modelling
JF - Ecological Modelling
SN - 0304-3800
ER -