Publications

Publications Found: 1373

Cushion Bogs Are Stronger Carbon Dioxide Net Sinks Than Moss-Dominated Bogs As Revealed By Eddy Covariance Measurements On Tierra Del Fuego, Argentina
Holl, D., Pancotto, V., Heger, A., Camargo, S. J., Kutzbach, L.

The near-pristine bog ecosystems of Tierra del Fuego in southernmost Patagonia have so far not been studied in terms of their current carbon dioxide (CO2) sink strength. CO2 flux data from Southern Hemisphere peatlands are scarce in general. In this study, we present CO2 net ecosystem exchange (NEE) fluxes from two Fuegian bog ecosystems …


Journal: Biogeosciences, Volume 16 (17): 3397-3423 (2019), ISBN . DOI: 10.5194/bg-16-3397-2019 Sites: AR-TF1, AR-TF2

The Eddy-Covariance Storage Term In Air: Consistent Community Resources Improve Flux Measurement Reliability
Xu, K., Pingintha-Durden, N., Luo, H., Durden, D., Sturtevant, C., Desai, A. R., Florian, C., Metzger, S.

In the widely-used eddy-covariance (EC) technique, it is often assumed that the air storage term, i.e. the change of below-turbulence-sensor scalar abundance, is negligible or comprises a small part of net surface-atmosphere exchange (NSAE). Previous studies have demonstrated that this assumption is often violated where non-turbulent …


Journal: Agricultural And Forest Meteorology, Volume 279: 107734 (2019), ISBN . DOI: 10.1016/j.agrformet.2019.107734 Sites: US-xAB, US-xBR, US-xUN

Relationships Between Methane and Carbon Dioxide Fluxes in a Temperate Cattail‐Dominated Freshwater Wetland
Villa, J., Ju, Y., Vines, C., Rey-Sanchez, C., Morin, T.H., Wrighton, K.C., Bohrer, G.

Wetlands are the most important natural source of methane (CH4) to the atmosphere, and there is still considerable uncertainty of CH4 flux and net carbon budgets of wetlands. This uncertainty is due in part to the complex role of wetland vegetation in controlling methane production, oxidation and transport, which challenge the modeling …


Journal: Journal of Geophysical Research-Biogeosciences, Volume 124 (7): 2076-2089 (2019), ISBN . DOI: 10.1029/2019JG005167 Sites: US-OWC

Gap‐Filling Approaches For Eddy Covariance Methane Fluxes: A Comparison Of Three Machine Learning Algorithms And A Traditional Method With Principal Component Analysis
Kim, Y., Johnson, M. S., Knox, S. H., Black, T. A., Dalmagro, H. J., Kang, M., Kim, J., Baldocchi, D.

Methane flux (FCH4 ) measurements using the eddy covariance technique have increased over the past decade. FCH4 measurements commonly include data gaps, as is the case with CO2 and energy fluxes. However, gap-filling FCH4 data are more challenging than other fluxes due to its unique characteristics including multidriver dependency, …


Journal: Global Change Biology, Volume : (2019), ISBN . DOI: 10.1111/gcb.14845 Sites: US-Twt

How Eddy Covariance Flux Measurements Have Contributed To Our Understanding Of Global Change Biology
Baldocchi, D. D.

A global network of long-term carbon and water flux measurements has existed since the late 1990s. With its representative sampling of the terrestrial biosphere’s climate and ecological spaces, this network is providing background information and direct measurements on how ecosystem metabolism responds to environmental and biological …


Journal: Global Change Biology, Volume : (2019), ISBN . DOI: 10.1111/gcb.14807 Sites:

Effect Of Drought-Induced Salinization On Wetland Methane Emissions, Gross Ecosystem Productivity, And Their Interactions
Chamberlain, S. D., Hemes, K. S., Eichelmann, E., Szutu, D. J., Verfaillie, J. G., Baldocchi, D. D.

Salinity gradients across estuaries influence wetland carbon storage, methane (CH4) biogeochemistry, and plant productivity. Estuarine freshwater wetlands may experience increases in salinity during drought; however, the impact of salinization on greenhouse gas (GHG) emissions is uncertain. We measured ecosystem-scale GHG emissions …


Journal: Ecosystems, Volume : (2019), ISBN . DOI: 10.1007/s10021-019-00430-5 Sites: US-Myb, US-Tw1

Bayesian Analyses of 17 Winters of Water Vapor Fluxes Show Bark Beetles Reduce Sublimation
Frank, J. M., Massman, W. J., Ewers, B. E., Williams, D. G.

Sublimation is an important hydrological flux in cold, snow-dominated ecosystems. In high-elevation spruce-fir forests of western North America, spruce beetle outbreaks have killed trees, reduced the canopy, and altered processes that control sublimation. We evaluated two hypotheses related to effects of disturbance on sublimation …


Journal: Water Resources Research, Volume 55 (2): 1598-1623 (2019), ISBN . DOI: 10.1029/2018wr023054 Sites: US-GBT, US-GLE

Water And Carbon Fluxes Along An Elevational Gradient In A Sagebrush Ecosystem
Flerchinger, G. N., Fellows, A. W., Seyfried, M. S., Clark, P. E., Lohse, K. A.


Journal: Ecosystems, Volume : (2019), ISBN . DOI: 10.1007/s10021-019-00400-x Sites: US-Rls, US-Rms, US-Rwf, US-Rws

From NEON field sites to data portal: a community resource for surface–atmosphere research comes online
Metzger, S., Ayres, E., Durden, D., Florian, C., Lee, R., Lunch, C., Luo, H., Pingintha-Durden, N., Roberti, J. A., SanClements, M., Sturtevant, C., Xu, K., Zulueta, R. C.

AbstractThe National Ecological Observatory Network (NEON) is a multidecadal and continental-scale observatory with sites across the United States. Having entered its operational phase in 2018, NEON data products, software, and services become available to facilitate research on the impacts of climate change, land-use change, and …


Journal: Bulletin Of The American Meteorological Society, Volume 100 (11): 2305-2325 (2019), ISBN . DOI: doi:10.1175/bams-d-17-0307.1 Sites: PR-xGU, PR-xLA, US-xAB, US-xAE, US-xBA, US-xBL, US-xBN, US-xBR, US-xCL, US-xCP, US-xDC, US-xDJ, US-xDL, US-xDS, US-xGR, US-xHA, US-xHE, US-xJE, US-xJR, US-xKA, US-xKZ, US-xLE, US-xMB, US-xML, US-xNG, US-xNQ, US-xNW, US-xPU, US-xRM, US-xRN, US-xSB, US-xSC, US-xSE, US-xSJ, US-xSL, US-xSP, US-xSR, US-xST, US-xTA, US-xTE, US-xTL, US-xTR, US-xUK, US-xUN, US-xWD, US-xWR, US-xYE

Wind Sheltering Impacts On Land-Atmosphere Fluxes Over Fens
Turner, J., Desai, A. R., Thom, J., Wickland, K. P., Olson, B.

Wetlands and their ability to mitigate climate change motivates restorative and protective action; however, scientific understanding of land-atmosphere interactions is restricted by our limited continuous observations of gaseous fluxes. Many wetlands are small in spatial scale and embedded in forested landscapes. Yet, little is known …


Journal: Frontiers In Environmental Science, Volume 7: (2019), ISBN . DOI: 10.3389/fenvs.2019.00179 Sites: US-ALQ, US-Los