AmeriFlux Publications from the Community

Carbon Exchange In An Amazon Forest: From Hours To Years
Hayek, M. N., Longo, M., Wu, J., Smith, M. N., Restrepo-Coupe, N., Tapajós, R., da Silva, R., Fitzjarrald, D. R., Camargo, P. B., Hutyra, L. R., Alves, L. F., Daube, B., Munger, J. W., Wiedemann, K. T., Saleska, S. R., Wofsy, S. C.

In Amazon forests, the relative contributions of climate, phenology, and disturbance to net ecosystem exchange of carbon (NEE) are not well understood. To partition influences across various timescales, we use a statistical model to represent eddy-covariance-derived NEE in an evergreen eastern Amazon forest as a constant response …

Journal: Biogeosciences, Volume 15 (15): 4833-4848 (2018). DOI: https://doi.org/10.5194/bg-15-4833-2018 Sites: BR-Sa1

Quantifying The Effect Of Forest Age In Annual Net Forest Carbon Balance
Besnard, S., Carvalhais, N., Arain, M. A., Black, A., de Bruin, S., Buchmann, N., Cescatti, A., Chen, J., Clevers, J. G., Desai, A. R., Gough, C. M., Havrankova, K., Herold, M., Hörtnagl, L., Jung, M., Knohl, A., Kruijt, B., Krupkova, L., Law, B. E., Lindroth, A., Noormets, A., Roupsard, O., Steinbrecher, R., Varlagin, A., Vincke, C., Reichstein, M.

Journal: Environmental Research Letters, Volume 13 (12): 124018 (2018). DOI: 10.1088/1748-9326/aaeaeb Sites: US-UMB

Ecosystem Fluxes Of Carbonyl Sulfide In An Old-Growth Forest: Temporal Dynamics And Responses To Diffuse Radiation And Heat Waves
Rastogi, B., Berkelhammer, M., Wharton, S., Whelan, M. E., Meinzer, F. C., Noone, D., Still, C. J.

Carbonyl sulfide (OCS) has recently emerged as a tracer for terrestrial carbon uptake. While physiological studies relating OCS fluxes to leaf stomatal dynamics have been established at leaf and branch scales and incorporated into global carbon cycle models, the quantity of data from ecosystem-scale field studies remains limited. …

Journal: Biogeosciences, Volume 15 (23): 7127-7139 (2018). DOI: 10.5194/bg-15-7127-2018 Sites: US-Wrc

Estimating Soil Respiration In A Subalpine Landscape Using Point, Terrain, Climate, And Greenness Data
Berryman, E. M., Vanderhoof, M. K., Bradford, J. B., Hawbaker, T. J., Henne, P. D., Burns, S. P., Frank, J. M., Birdsey, R. A., Ryan, M. G.

Landscape carbon (C) flux estimates help assess the ability of terrestrial ecosystems to buffer further increases in anthropogenic carbon dioxide (CO2) emissions. Advances in remote sensing have led to coarse‐scale estimates of gross primary productivity (GPP; e.g., MODIS 17), yet efforts to develop spatial respiration products …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 123 (10): 3231-3249 (2018). DOI: 10.1029/2018JG004613 Sites: US-NR1

Quantifying The Effect Of Forest Age In Annual Net Forest Carbon Balance
Besnard, S., Carvalhais, N., Arain, M. A., Black, A., de Bruin, S., Buchmann, N., Cescatti, A., Chen, J., Clevers, J. G., Desai, A. R., Gough, C. M., Havrankova, K., Herold, M., Hörtnagl, L., Jung, M., Knohl, A., Kruijt, B., Krupkova, L., Law, B. E., Lindroth, A., Noormets, A., Roupsard, O., Steinbrecher, R., Varlagin, A., Vincke, C., Reichstein, M.

Journal: Environmental Research Letters, Volume 13 (12): 124018 (2018). DOI: 10.1088/1748-9326/aaeaeb Sites: US-Syv, US-WCr

Snowmelt‐Driven Trade‐Offs Between Early And Late Season Productivity Negatively Impact Forest Carbon Uptake During Drought
Knowles, J. F., Molotch, N. P., Trujillo, E., Litvak, M. E.

Journal: Geophysical Research Letters, Volume 45 (7): 3087-3096 (2018). DOI: 10.1002/2017GL076504 Sites: US-Vcm, US-Vcp

Why Do Large-Scale Land Surface Models Produce A Low Ratio Of Transpiration To Evapotranspiration?
Chang, L., Dwivedi, R., Knowles, J. F., Fang, Y., Niu, G., Pelletier, J. D., Rasmussen, C., Durcik, M., Barron-Gafford, G. A., Meixner, T.

Most land surface models (LSMs) used in Earth System Models produce a lower ratio of transpiration (T) to evapotranspiration (ET) than field observations, degrading the credibility of Earth System Model-projected ecosystem responses and feedbacks to climate change. To interpret this model deficiency, we conducted a pair of model …

Journal: Journal Of Geophysical Research: Atmospheres, Volume 123 (17): 9109-9130 (2018). DOI: 10.1029/2018JD029159 Sites: US-MtB

Carbon Fluxes And Interannual Drivers In A Temperate Forest Ecosystem Assessed Through Comparison Of Top-Down And Bottom-Up Approaches
Ouimette, A. P., Ollinger, S. V., Richardson, A. D., Hollinger, D. Y., Keenan, T. F., Lepine, L. C., Vadeboncoeur, M. A.

Journal: Agricultural And Forest Meteorology, Volume 256-257: 420-430 (2018). DOI: 10.1016/j.agrformet.2018.03.017 Sites: US-Bar

Merging a mechanistic enzymatic model of soil heterotrophic respiration into an ecosystem model in two AmeriFlux sites of northeastern USA
Sihi, D, Davidson, E.A., Chen, M, Savage, K.E., Richardson, A.D., Keenan, T.F., Hollinger, D. Y.

Heterotrophic respiration (Rh), microbial processing of soil organic matter to carbon dioxide (CO2), is a major, yet highly uncertain, carbon (C) flux from terrestrial systems to the atmosphere. Temperature sensitivity of Rh is often represented with a simple Q10 function in ecosystem models and earth system models (ESMs), sometimes …

Journal: Agricultural and Forest Meteorology, Volume 252: 155-166 (2018). DOI: https://doi.org/10.1016/j.agrformet.2018.01.026 Sites: US-Ha1, US-Ho1

Globally Rising Soil Heterotrophic Respiration Over Recent Decades
Bond-Lamberty, B., Bailey, V. L., Chen, M., Gough, C. M., Vargas, R.

Journal: Nature, Volume 560 (7716): 80-83 (2018). DOI: 10.1038/s41586-018-0358-x Sites: US-UMB, US-UMd

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