Savannas are spatially heterogeneous, open ecosystems, thus efforts to quantify canopy structure with methods developed for homogeneous, closed canopies are prone to failure. We examine the applicability of two direct (litterfall, allometry) and five indirect (LAI-2000, …
Journal: Agricultural And Forest Meteorology, Volume 150 (1): 63-76 (2010). DOI: 10.1016/j.agrformet.2009.08.007 Sites: US-Ton
As climate change accelerates, it is important to know the likely impact of climate change on the carbon cycle (see the Perspective by Reich). Gross primary production (GPP) …
Journal: Science, Volume 329 (5993): 838-840 (2010). DOI: 10.1126/science.1189587 Sites: BR-Ma2
The higher-order scalar concentration fluctuation properties are examined in the context of Monin–Obukhov similarity theory for a variety of greenhouse gases that have distinct and separate source/sink locations along an otherwise ideal micrometeorological …
Journal: Boundary-Layer Meteorology, Volume 136 (3): 407-430 (2010). DOI: 10.1007/s10546-010-9514-z Sites: US-Snd
Observations of the temporal and spatial distribution of poststorm soil moisture in open shrublands and savannas are limited, yet they are critical to understanding the interaction and feedback between moisture distribution and canopies. The objective of this analysis was to study the hydrologic impacts of precipitation pulses on …
Journal: Water Resources Research, Volume 46 (W10509): n/a-n/a (2010). DOI: 10.1029/2009WR008842 Sites: US-Whs
Carbon dioxide (CO2) emissions from soil, foliage, and live woody tissue were measured throughout the year in afforested, white pine (Pinus strobus L.) stands (67, 32, 17, and 4 years old as of 2006), growing in a northern temperate climate. The data were used to estimate annual ecosystem respiration (Re) …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G03024): n/a-n/a (2010). DOI: 10.1029/2009JG001089 Sites: CA-TP1, CA-TP3, CA-TP4
A significant fraction of Earth consists of mountainous terrain. However, the question of how to monitor the surface–atmosphere carbon exchange over complex terrain has not been fully explored. This article reports on studies by a team of investigators from U.S. universities and research institutes who carried out a multiscale …
Journal: Bulletin Of The American Meteorological Society, Volume 91 (2): 209-230 (2010). DOI: 10.1175/2009BAMS2733.1 Sites: US-NR1
This study compares eddy-covariance measurements of carbon dioxide fluxes at six northern temperate and boreal peatland sites in Canada and the northern United States of America, representing both bogs and fens. The two peatland types had opposite responses of gross ecosystem photosynthesis (GEP) and ecosystem respiration (ER) to …
Journal: Geophysical Research Letters, Volume 37 (19): n/a-n/a (2010). DOI: 10.1029/2010GL044018 Sites: US-Los
Observations of regional net ecosystem exchange (NEE) of CO2 for 1997–2007 were analyzed for climatic controls on interannual variability (IAV). Quantifying IAV of regional (104–106 km2) NEE over long time periods is key to understanding potential feedbacks between climate and the carbon …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G2): n/a-n/a (2010). DOI: 10.1029/2009JG001122 Sites: US-PFa
Better understanding of variation in soil carbon dioxide (CO2) efflux caused by measurement techniques is needed, especially over gradients of site disturbance, …
Journal: Global Change Biology, Volume 16: 2449-2460 (2010). DOI: 10.1111/j.1365-2486.2009.02139.x Sites: US-Fuf, US-Fwf
During 2005–2007, we used the eddy covariance and associated hydrometric methods to construct energy and water budgets along a chronosequence of loblolly pine (Pinus taeda) plantations that included a mid-rotation stand (LP) (i.e., 13–15 years old) and a recently established stand on a clearcut site (CC) (i.e., 4–6 …
Journal: Forest Ecology And Management, Volume 259 (7): 1299-1310 (2010). DOI: 10.1016/j.foreco.2009.09.016 Sites: US-NC1, US-NC2