Journal: Agricultural And Forest Meteorology, Volume 171-172: 31-45 (2013). DOI: 10.1016/j.agrformet.2012.11.023 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Gro, CA-Let, CA-Mer, CA-NS1, CA-Oas, CA-Obs, CA-Ojp, CA-Qfo, CA-SJ1, CA-SJ2, CA-SJ3, CA-TP4, CA-WP1, US-ARM, US-Dk3, US-Ha1, US-Ho1, US-IB1, US-Los, US-Me3, US-Me5, US-MMS, US-MOz, US-Ne1, US-Ne2, US-Ne3, US-NR1, US-Shd, US-SO2, US-Syv, US-Ton, US-UMB, US-Var, US-WCr
The δ13C value of terrestrial CO2 fluxes (δbio) provides important information for inverse models of CO2 sources and sinks as well as for studies of vegetation physiology, C3 and C4 vegetation fluxes, and ecosystem carbon residence times. From 2002.2009, we measured atmospheric CO2 concentration and δ13C-CO2 at four heights (2 …
Journal: Tellus B: Chemical And Physical Meteorology, Volume 63 (2): 181-195 (2011). DOI: http://doi.org/10.1111/j.1600-0889.2010.00519.x Sites: US-ARM
This study evaluates the potential impact of clouds on ecosystem CO2 and CO2 isotope fluxes (“isofluxes”) in two contrasting ecosystems (a broadleaf deciduous forest and a C4 grassland) in a region for which cloud cover, meteorological, and isotope data are available for driving the isotope‐enabled land surface model (ISOLSM). …
Journal: Journal Of Geophysical Research, Volume 114 (G1): (2009). DOI: http://doi.org/10.1029/2007JG000675 Sites: US-ARM
Characterizing net ecosystem exchanges (NEE) of CO2 and sensible and latent heat fluxes in heterogeneous landscapes is difficult, yet critical given expected changes in climate and land use. We report here a measurement and modeling study designed to improve our understanding of surface to atmosphere gas exchanges under very heterogeneous …
Journal: Journal Of Geophysical Research, Volume 114 (G4): (2009). DOI: http://doi.org/10.1029/2009JG001003 Sites: US-ARM
Climate, vegetation cover, and management create finescale heterogeneity in unirrigated agricultural regions, with important but not well-quantified consequences for spatial and temporal variations in surface CO2, water, and heat fluxes. Eddy covariance fluxes were measured in seven agricultural fields—comprising winter wheat, …
Journal: Earth Interactions, Volume 11 (17): 1-21 (2007). DOI: 10.1175/EI231.1 Sites: US-ARM