Boreal black spruce forests typically have a dense ground cover of bryophytes. The two main bryophyte groups in boreal black spruce forests, feathermoss and Sphagnum, have ecophysiological characteristics that influence …
Journal: Oecologia, Volume 129 (2): 261-270 (2001), ISBN . DOI: 10.1007/s004420100719 Sites: CA-Obs
Disturbances by fire and harvesting are thought to regulate the carbon balance of the Canadian boreal forest over scales of several decades. However, there are few direct measurements …
Journal: Global Change Biology, Volume 7 (3): 253-268 (2001), ISBN . DOI: 10.1046/j.1365-2486.2001.00398.x Sites: CA-SF2, CA-SF3
The severity and spatial extent of the health impact of anthropogenic mercury (Hg) emission to the atmosphere depend on the emission rate and chemical form of the emitted species. The few measurements of combustion flue gas give highly variable results about how the emission is divided between the elemental (Hg°) and reactive forms …
Journal: Geophysical Research Letters, Volume 28 (7): 1231-1234 (2001), ISBN . DOI: 10.1029/2000gl012274 Sites: US-GMF
Temporal trends in photosynthetic capacity are a critical factorin determining the seasonality and magnitude of ecosystem carbonfluxes. At a mixed deciduous forest in the south-eastern United States (Walker Branch Watershed, Oak Ridge, TN, USA), we independently measured seasonal trends in photosynthetic capacity (using single-leaf …
Journal: Plant, Cell And Environment, Volume 24 (6): 571-583 (2001), ISBN . DOI: 10.1046/j.0016-8025.2001.00706.x Sites: US-WBW
This study explores the complexity (or disorder) in mapping energy (Rn) forcing to land surface fluxes of sensible heat (Hs), water vapor (LE), and carbon dioxide (or net ecosystem exchange, NEE) for different soil water states (θ). Specifically, we ask, does the vegetation …
Journal: Geophysical Research Letters, Volume 28 (17): 3305-3307 (2001), ISBN . DOI: 10.1029/2000gl012154 Sites: US-Dk3
Year-round measurements of surface energy fluxes, supporting meteorological parameters, soil moisture, and leaf foliage area were made at a tallgrass prairie site in north-central Oklahoma. Here we present the results of the first year (August 1996 to early September 1997) …
Journal: Agricultural And Forest Meteorology, Volume 107 (3): 227-240 (2001), ISBN . DOI: 10.1016/s0168-1923(00)00233-1 Sites: US-Shd
Journal: Tree Physiology, Volume 21 (5): 309-318 (2001), ISBN . DOI: 10.1093/treephys/21.5.309 Sites: US-Blo
The variability in land surface heat (H), water vapor (LE), and CO2 (or net ecosystem exchange, NEE) fluxes was investigated at scales ranging from fractions of seconds to years using eddy-covariance flux measurements above a pine forest. Because these fluxes …
Journal: Advances In Water Resources, Volume 24 (9-10): 1119-1132 (2001), ISBN . DOI: 10.1016/s0309-1708(01)00029-x Sites: US-Dk3
FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140 sites are operating on a long–term and continuous basis. Vegetation under study includes temperate conifer and broadleaved (deciduous …
Journal: Bulletin Of The American Meteorological Society, Volume 82 (11): 2415-2434 (2001), ISBN . DOI: 10.1175/1520-0477(2001)082<2415:FANTTS>2.3.CO;2 Sites: US-MMS
A multi-year, multi-technique study was conducted to measure evapotranspiration and its components within an uneven-aged mixed deciduous forest in the Southeastern United States. Four different measurement techniques were used, including soil water budget (1 year), sap flow …
Journal: Agricultural And Forest Meteorology, Volume 106 (2): 153-168 (2001), ISBN . DOI: 10.1016/s0168-1923(00)00199-4 Sites: US-WBW