caa a22 4500 445383410 CHVBK 20180317143024.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10021-010-9396-4 doi (NATIONALLICENCE)springer-10.1007/s10021-010-9396-4 Scaling an Instantaneous Model of Tundra NEE to the Arctic Landscape [Elektronische Daten] [Michael Loranty, Scott Goetz, Edward Rastetter, Adrian Rocha, Gaius Shaver, Elyn Humphreys, Peter Lafleur] We scale a model of net ecosystem CO2 exchange (NEE) for tundra ecosystems and assess model performance using eddy covariance measurements at three tundra sites. The model, initially developed using instantaneous (seconds-minutes) chamber flux (~m2) observations, independently represents ecosystem respiration (ER) and gross primary production (GPP), and requires only temperature (T), photosynthetic photon flux density (I 0), and leaf area index (L) as inputs. We used a synthetic data set to parameterize the model so that available in situ observations could be used to assess the model. The model was then scaled temporally to daily resolution and spatially to about 1km2 resolution, and predicted values of NEE, and associated input variables, were compared to observations obtained from eddy covariance measurements at three flux tower sites over several growing seasons. We compared observations to modeled NEE calculated using T and I 0 measured at the towers, and L derived from MODIS data. Cumulative NEE estimates were within 17 and 11% of instrumentation period and growing season observations, respectively. Predictions improved when one site-year experiencing anomalously dry conditions was excluded, indicating the potential importance of stomatal control on GPP and/or soil moisture on ER. Notable differences in model performance resulted from ER model formulations and differences in how L was estimated. Additional work is needed to gain better predictive ability in terms of ER and L. However, our results demonstrate the potential of this model to permit landscape scale estimates of NEE using relatively few and simple driving variables that are easily obtained via satellite remote sensing. Springer Science+Business Media, LLC, 2010 tundra nationallicence CO2 flux nationallicence NEE nationallicence upscaling nationallicence modeling nationallicence arctic carbon exchange nationallicence Loranty Michael Woods Hole Research Center, 149 Woods Hole Rd, 02536, Falmouth, Massachusetts, USA aut Goetz Scott Woods Hole Research Center, 149 Woods Hole Rd, 02536, Falmouth, Massachusetts, USA aut Rastetter Edward The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut Rocha Adrian The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut Shaver Gaius The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut Humphreys Elyn Department of Geography and Environmental Studies, Carleton University, 1125 Colonel By Drive, K1S 5B6, Ottawa, Ontario, Canada aut Lafleur Peter Department of Geography, Trent University, 1600 West Bank Drive, K9J 7B8, Peterborough, Ontario, Canada aut Ecosystems Springer-Verlag 14/1(2011-01-01), 76-93 1432-9840 14:1<76 2011 14 10021 https://doi.org/10.1007/s10021-010-9396-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-010-9396-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Loranty Michael Woods Hole Research Center, 149 Woods Hole Rd, 02536, Falmouth, Massachusetts, USA aut NATIONALLICENCE 700 1- Goetz Scott Woods Hole Research Center, 149 Woods Hole Rd, 02536, Falmouth, Massachusetts, USA aut NATIONALLICENCE 700 1- Rastetter Edward The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut NATIONALLICENCE 700 1- Rocha Adrian The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut NATIONALLICENCE 700 1- Shaver Gaius The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, 02543, Woods Hole, Massachusetts, USA aut NATIONALLICENCE 700 1- Humphreys Elyn Department of Geography and Environmental Studies, Carleton University, 1125 Colonel By Drive, K1S 5B6, Ottawa, Ontario, Canada aut NATIONALLICENCE 700 1- Lafleur Peter Department of Geography, Trent University, 1600 West Bank Drive, K9J 7B8, Peterborough, Ontario, Canada aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/1(2011-01-01), 76-93 1432-9840 14:1<76 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer