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Title: ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO 2, water, and energy fluxes on daily to annual scales

Abstract

Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO 2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation ( V cmax) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) ( r 2 = 0.76; Nash–Sutcliffe modeling efficiency, MEF  = 0.76) and ecosystem respiration (ER, r 2 = 0.78, MEF = 0.75), with lesser accuracy for latent heat fluxes (LE, r 2 = 0.42, MEF = 0.14) and and net ecosystem CO 2 exchange (NEE, r 2 = 0.38, MEF = 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to highmore » r 2 values (0.57–0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r 2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted ( r 2 < 0.1), likely due to the uncertain water input to the peat from surrounding areas. However, the poor performance of WT simulation did not greatly affect predictions of ER and NEE. We found a significant relationship between optimized V cmax and latitude (temperature), which better reflects the spatial gradients of annual NEE than using an average V cmax value« less

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
European Geosciences Union
OSTI Identifier:
1563945
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Geoscientific Model Development (Online)
Additional Journal Information:
Journal Name: Geoscientific Model Development (Online); Journal Volume: 11; Journal Issue: 2; Journal ID: ISSN 1991-9603
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Qiu, Chunjing, Zhu, Dan, Ciais, Philippe, Guenet, Bertrand, Krinner, Gerhard, Peng, Shushi, Aurela, Mika, Bernhofer, Christian, Brümmer, Christian, Bret-Harte, Syndonia, Chu, Housen, Chen, Jiquan, Desai, Ankur R., Dušek, Jiří, Euskirchen, Eugénie S., Fortuniak, Krzysztof, Flanagan, Lawrence B., Friborg, Thomas, Grygoruk, Mateusz, Gogo, Sébastien, Grünwald, Thomas, Hansen, Birger U., Holl, David, Humphreys, Elyn, Hurkuck, Miriam, Kiely, Gerard, Klatt, Janina, Kutzbach, Lars, Largeron, Chloé, Laggoun-Défarge, Fatima, Lund, Magnus, Lafleur, Peter M., Li, Xuefei, Mammarella, Ivan, Merbold, Lutz, Nilsson, Mats B., Olejnik, Janusz, Ottosson-Löfvenius, Mikaell, Oechel, Walter, Parmentier, Frans-Jan W., Peichl, Matthias, Pirk, Norbert, Peltola, Olli, Pawlak, Włodzimierz, Rasse, Daniel, Rinne, Janne, Shaver, Gaius, Schmid, Hans Peter, Sottocornola, Matteo, Steinbrecher, Rainer, Sachs, Torsten, Urbaniak, Marek, Zona, Donatella, and Ziemblinska, Klaudia. ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales. United States: N. p., 2018. Web. doi:10.5194/gmd-11-497-2018.
Qiu, Chunjing, Zhu, Dan, Ciais, Philippe, Guenet, Bertrand, Krinner, Gerhard, Peng, Shushi, Aurela, Mika, Bernhofer, Christian, Brümmer, Christian, Bret-Harte, Syndonia, Chu, Housen, Chen, Jiquan, Desai, Ankur R., Dušek, Jiří, Euskirchen, Eugénie S., Fortuniak, Krzysztof, Flanagan, Lawrence B., Friborg, Thomas, Grygoruk, Mateusz, Gogo, Sébastien, Grünwald, Thomas, Hansen, Birger U., Holl, David, Humphreys, Elyn, Hurkuck, Miriam, Kiely, Gerard, Klatt, Janina, Kutzbach, Lars, Largeron, Chloé, Laggoun-Défarge, Fatima, Lund, Magnus, Lafleur, Peter M., Li, Xuefei, Mammarella, Ivan, Merbold, Lutz, Nilsson, Mats B., Olejnik, Janusz, Ottosson-Löfvenius, Mikaell, Oechel, Walter, Parmentier, Frans-Jan W., Peichl, Matthias, Pirk, Norbert, Peltola, Olli, Pawlak, Włodzimierz, Rasse, Daniel, Rinne, Janne, Shaver, Gaius, Schmid, Hans Peter, Sottocornola, Matteo, Steinbrecher, Rainer, Sachs, Torsten, Urbaniak, Marek, Zona, Donatella, & Ziemblinska, Klaudia. ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales. United States. doi:10.5194/gmd-11-497-2018.
Qiu, Chunjing, Zhu, Dan, Ciais, Philippe, Guenet, Bertrand, Krinner, Gerhard, Peng, Shushi, Aurela, Mika, Bernhofer, Christian, Brümmer, Christian, Bret-Harte, Syndonia, Chu, Housen, Chen, Jiquan, Desai, Ankur R., Dušek, Jiří, Euskirchen, Eugénie S., Fortuniak, Krzysztof, Flanagan, Lawrence B., Friborg, Thomas, Grygoruk, Mateusz, Gogo, Sébastien, Grünwald, Thomas, Hansen, Birger U., Holl, David, Humphreys, Elyn, Hurkuck, Miriam, Kiely, Gerard, Klatt, Janina, Kutzbach, Lars, Largeron, Chloé, Laggoun-Défarge, Fatima, Lund, Magnus, Lafleur, Peter M., Li, Xuefei, Mammarella, Ivan, Merbold, Lutz, Nilsson, Mats B., Olejnik, Janusz, Ottosson-Löfvenius, Mikaell, Oechel, Walter, Parmentier, Frans-Jan W., Peichl, Matthias, Pirk, Norbert, Peltola, Olli, Pawlak, Włodzimierz, Rasse, Daniel, Rinne, Janne, Shaver, Gaius, Schmid, Hans Peter, Sottocornola, Matteo, Steinbrecher, Rainer, Sachs, Torsten, Urbaniak, Marek, Zona, Donatella, and Ziemblinska, Klaudia. Mon . "ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales". United States. doi:10.5194/gmd-11-497-2018. https://www.osti.gov/servlets/purl/1563945.
@article{osti_1563945,
title = {ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales},
author = {Qiu, Chunjing and Zhu, Dan and Ciais, Philippe and Guenet, Bertrand and Krinner, Gerhard and Peng, Shushi and Aurela, Mika and Bernhofer, Christian and Brümmer, Christian and Bret-Harte, Syndonia and Chu, Housen and Chen, Jiquan and Desai, Ankur R. and Dušek, Jiří and Euskirchen, Eugénie S. and Fortuniak, Krzysztof and Flanagan, Lawrence B. and Friborg, Thomas and Grygoruk, Mateusz and Gogo, Sébastien and Grünwald, Thomas and Hansen, Birger U. and Holl, David and Humphreys, Elyn and Hurkuck, Miriam and Kiely, Gerard and Klatt, Janina and Kutzbach, Lars and Largeron, Chloé and Laggoun-Défarge, Fatima and Lund, Magnus and Lafleur, Peter M. and Li, Xuefei and Mammarella, Ivan and Merbold, Lutz and Nilsson, Mats B. and Olejnik, Janusz and Ottosson-Löfvenius, Mikaell and Oechel, Walter and Parmentier, Frans-Jan W. and Peichl, Matthias and Pirk, Norbert and Peltola, Olli and Pawlak, Włodzimierz and Rasse, Daniel and Rinne, Janne and Shaver, Gaius and Schmid, Hans Peter and Sottocornola, Matteo and Steinbrecher, Rainer and Sachs, Torsten and Urbaniak, Marek and Zona, Donatella and Ziemblinska, Klaudia},
abstractNote = {Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation (Vcmax) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) (r2 = 0.76; Nash–Sutcliffe modeling efficiency, MEF  = 0.76) and ecosystem respiration (ER, r2 = 0.78, MEF = 0.75), with lesser accuracy for latent heat fluxes (LE, r2 = 0.42, MEF = 0.14) and and net ecosystem CO2 exchange (NEE, r2 = 0.38, MEF = 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to high r2 values (0.57–0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted (r2 < 0.1), likely due to the uncertain water input to the peat from surrounding areas. However, the poor performance of WT simulation did not greatly affect predictions of ER and NEE. We found a significant relationship between optimized Vcmax and latitude (temperature), which better reflects the spatial gradients of annual NEE than using an average Vcmax value},
doi = {10.5194/gmd-11-497-2018},
journal = {Geoscientific Model Development (Online)},
number = 2,
volume = 11,
place = {United States},
year = {2018},
month = {1}
}

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