AmeriFlux Publications from the Community

Short-term favorable weather conditions are an important control of interannual variability in carbon and water fluxes
Zscheischler, J., Fatichi, S., Wolf, S., Blanken, P., Bohrer, G., Clark, K., Desai, A., Hollinger, D., Keenan, T., Novick, K.A., Seneviratne, S.I.

Ecosystem models often perform poorly in reproducing interannual variability in carbon and water fluxes, resulting in considerable uncertainty when estimating the land-carbon sink. While many aggregated variables (growing season length, seasonal precipitation, or temperature) have been suggested as predictors for interannual variability …

Journal: Journal of Geophysical Research - Biogeosciences, Volume 121 (8): 2186-2198 (2016), ISBN . DOI: 10.1002/2016JG003503 Sites: US-Bar, US-Ced, US-Ho1, US-MMS, US-NR1, US-PFa, US-Slt, US-UMB

Landscape-level terrestrial methane flux observed from a very tall tower
Desai, A.R., Xu, K., Tian, H., Weishampel, P., Thom, J., Baumann, D., Andrews, A.E., Cook, B.D., King, J.Y., Kolka, R.

Simulating the magnitude and variability of terrestrial methane sources and sinks poses a challenge to ecosystem models because the biophysical and biogeochemical processes that lead to methane emissions from terrestrial and freshwater ecosystems are, by their nature, episodic and spatially disjunct. As a consequence, model predictions …

Journal: Agricultural and Forest Meteorology, Volume 201: 61-75 (2015), ISBN . DOI: 10.1016/j.agrformet.2014.10.017 Sites: US-PFa

The Uncertain Climate Footprint Of Wetlands Under Human Pressure
Petrescu, A. M., Lohila, A., Tuovinen, J., Baldocchi, D. D., Desai, A. R., Roulet, N. T., Vesala, T., Dolman, A. J., Oechel, W. C., Marcolla, B., Friborg, T., Rinne, J., Matthes, J. H., Merbold, L., Meijide, A., Kiely, G., Sottocornola, M., Sachs, T., Zona, D., Varlagin, A., Lai, D. Y., Veenendaal, E., Parmentier, F. W., Skiba, U., Lund, M., Hensen, A., van Huissteden, J., Flanagan, L. B., Shurpali, N. J., Grünwald, T., Humphreys, E. R., Jackowicz-Korczyński, M., Aurela, M. A., Laurila, T., Grüning, C., Corradi, C. A., Schrier-Uijl, A. P., Christensen, T. R., Tamstorf, M. P., Mastepanov, M., Martikainen, P. J., Verma, S. B., Bernhofer, C., Cescatti, A.

Significant climate risks are associated with a positive carbon–temperature feedback in northern latitude carbon-rich ecosystems, making an accurate analysis of human impacts on the net greenhouse gas balance of wetlands a priority. Here, we provide a coherent assessment of the climate footprint of a network of wetland sites based …

Journal: Proceedings Of The National Academy Of Sciences, Volume 112 (15): 4594-4599 (2015), ISBN . DOI: 10.1073/pnas.1416267112 Sites: US-PFa

Landscape-Level Terrestrial Methane Flux Observed From A Very Tall Tower
Desai, A. R., Xu, K., Tian, H., Weishampel, P., Thom, J., Baumann, D., Andrews, A. E., Cook, B. D., King, J. Y., Kolka, R.

Simulating the magnitude and variability of terrestrial methane sources and sinks poses a challenge to ecosystem models because the biophysical and biogeochemical processes that lead to methane emissions from terrestrial and freshwater ecosystems are, by their nature, episodic and spatially disjunct. As a consequence, model predictions …

Journal: Agricultural And Forest Meteorology, Volume 201: 61-75 (2015), ISBN . DOI: 10.1016/j.agrformet.2014.10.017 Sites: US-PFa

Characterizing The Diurnal Patterns of Errors in The Prediction of Evapotranspiration by Several Land-Surface Models: An Nacp Analysis
Matheny, A. M., Bohrer, G., Stoy, P. C., Baker, I. T., Black, A. T., Desai, A. R., Dietze, M. C., Gough, C. M., Ivanov, V. Y., Jassal, R. S., Novick, K. A., Schäfer, K. V., Verbeeck, H.

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 119 (7): 1458-1473 (2014), ISBN . DOI: 10.1002/2014JG002623 Sites: CA-Ca1, CA-Gro, CA-Let, CA-Oas, CA-Ojp, CA-Qfo, US-ARM, US-Dk3, US-Ha1, US-Ho1, US-IB2, US-Me2, US-MMS, US-MOz, US-Ne1, US-Ne2, US-Ne3, US-NR1, US-PFa, US-Syv, US-Ton, US-UMB, US-Var, US-WCr

Influence And Predictive Capacity Of Climate Anomalies On Daily To Decadal Extremes In Canopy Photosynthesis
Desai, A. R.

Significant advances have been made over the past decades in capabilities to simulate diurnal and seasonal variation of leaf-level and canopy-scale photosynthesis in temperate and boreal forests. However, long-term prediction of future forest productivity …

Journal: Photosynthesis Research, Volume 119 (1-2): 31-47 (2014), ISBN . DOI: 10.1007/s11120-013-9925-z Sites: US-PFa

CO2, CO, And CH4 Measurements From Tall Towers In The NOAA Earth System Research Laboratory's Global Greenhouse Gas Reference Network: Instrumentation, Uncertainty Analysis, And Recommendations For Future High-Accuracy Greenhouse Gas Monitoring Efforts
Andrews, A.E., Kofler, J.D., Trudeau, M.E., Williams, J.C., Neff, D.H., Masarie, K.A., Chao, D.Y., Kitzis, D.R., Novelli, P.C., Zhao, C.L., Dlugokencky, E.J., Lang, P.M., Crotwell, M.J., Fischer, M.L., Parker, M.J., Lee, J.T., Baumann, D.D., Desai, A.R., Stanier, C.O., de Wekker, S.F.J., Wolfe, D.E., Munger, J.W., Tans, P.P.

A reliable and precise in situ CO₂ and CO analysis system has been developed and deployed at eight sites in the NOAA Earth System Research Laboratory’s (ESRL) Global Greenhouse Gas Reference Network. The network uses very tall (> 300 m) television and radio transmitter towers that provide a convenient platform for mid-boundary-layer …

Journal: Atmospheric Measurement Techniques, Volume 7 (2): 647-687 (2014), ISBN . DOI: 10.5194/amt-7-647-2014 Sites: US-PFa

The Spatial Scale Dependence Of Water Vapor Variability Inferred From Observations From A Very Tall Tower
Pressel, K. G., Collins, W. D., Desai, A. R.

Recent studies have established that atmospheric water vapor fields exhibit spatial spectra that take the form of power laws and hence can be compactly characterized by scaling exponents. The power law scaling exponents have been shown to exhibit substantial vertical variability. In this work, Taylor’s frozen turbulence hypothesis …

Journal: Journal Of Geophysical Research: Atmospheres, Volume 119 (16): 9822-9837 (2014), ISBN . DOI: 10.1002/2013JD021141 Sites: US-PFa

The Imprint Of Surface Fluxes And Transport On Variations In Total Column Carbon Dioxide

New observations of the vertically integrated CO₂ mixing ratio, ⟨CO₂⟩, from ground-based remote sensing show that variations in CO₂⟩ are primarily determined by large-scale flux patterns. They therefore provide fundamentally different information than observations made …

Journal: Biogeosciences, Volume 9 (3): 875-891 (2012), ISBN . DOI: 10.5194/bg-9-875-2012 Sites: US-PFa

The Influence Of Carbon Exchange Of A Large Lake On Regional Tracer-Transport Inversions: Results From Lake Superior
Vasys, V. N., Desai, A. R., McKinley, G. A., Bennington, V., Michalak, A. M., Andrews, A. E.

Large lakes may constitute a significant component of regional surface–atmosphere fluxes, but few efforts have been made to quantify these fluxes. Tracer-transport inverse models that infer the CO₂ flux from the atmospheric concentration typically assume that the influence from large lakes is negligible. CO₂ …

Journal: Environmental Research Letters, Volume 6 (3): n/a-n/a (2011), ISBN . DOI: 10.1088/1748-9326/6/3/034016 Sites: US-PFa

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