Publications

Publications Found: 1437

Annual And Seasonal Variability Of Sensible And Latent Heat Fluxes Above A Coastal Douglas-Fir Forest, British Columbia, Canada
Humphreys, E., Black, T., Ethier, G., Drewitt, G., Spittlehouse, D., Jork, E., Nesic, Z., Livingston, N.

Two years of continuous eddy covariance measurements were used to characterize the seasonal and annual variability of the latent and sensible heat fluxes above a 50-year-old, 33 m tall coastal Douglas-fir forest on the east coast of Vancouver Island, Canada. The total annual evaporation was found to be very conservative …


Journal: Agricultural And Forest Meteorology, Volume 115 (1-2): 109-125 (2003). DOI: 10.1016/s0168-1923(02)00171-5 Sites: CA-Ca1

Effects Of Elevated Atmospheric CO2 On Net Ecosystem CO2 Exchange Of A Scrub-Oak Ecosystem
Hymus, G. J., Johnson, D. P., Dore, S., Anderson, H. P., Ross Hinkle, C., Drake, B. G.

We report the results of a 2-year study of effects of the elevated (current ambient plus 350 μmol CO2 mol−1) atmospheric CO2 concentration (Ca) on net ecosystem CO2 exchange (NEE) of a scrub–oak ecosystem. The measurements were made in open-top chambers …


Journal: Global Change Biology, Volume 9 (12): 1802-1812 (2003). DOI: 10.1111/j.1365-2486.2003.00675.x Sites: US-KS2

Characterization Of Secondary Atmospheric Photooxidation Products: Evidence For Biogenic And Anthropogenic Sources
Spaulding, R. S., Schade, G. W., Goldstein, A. H., Charles, M. J.

Measurements of the biogenic hydrocarbons isoprene and 2-methyl-3-buten-2-ol (MBO), their first-, second-, and third-generation photooxidation products methacrolein (MACR), methyl vinyl ketone (MVK), acetone, 2-hydroxy-2-methylpropanal (2-HMPR), glycolaldehyde, hydroxyacetone, methylglyoxal, and glyoxal, and carbon monoxide (CO), …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 108 (D8): n/a-n/a (2003). DOI: 10.1029/2002jd002478 Sites: US-Blo

Substantial Labile Carbon Stocks And Microbial Activity In Deeply Weathered Soils Below A Tropical Wet Forest
Veldkamp, E., Becker, A., Schwendenmann, L., Clark, D. A., Schulte-Bisping, H.

Contrary to large areas in Amazonia of tropical moist forests with a pronounced dry season, tropical wet forests in Costa Rica do not depend on deep roots to maintain an evergreen forest canopy through the year. At our Costa Rican tropical wet forest sites, we found a large carbon stock in the subsoil of deeply weathered Oxisols, …


Journal: Global Change Biology, Volume 9 (8): 1171-1184 (2003). DOI: 10.1046/j.1365-2486.2003.00656.x Sites: CR-Lse

Elevated CO2 Lowers Relative And Absolute Herbivore Density Across All Species Of A Scrub-Oak Forest
Stiling, P., Moon, D., Hunter, M., Colson, J., Rossi, A., Hymus, G., Drake, B.

The unabated increase in global atmospheric CO2 is expected to induce physiological changes in plants, including reduced foliar nitrogen, which are likely to affect herbivore densities. This study employs a field-based CO2 enrichment experiment at Kennedy Space Center, Florida, to examine plant-herbivore (insect) …


Journal: Oecologia, Volume 134 (1): 82-87 (2003). DOI: 10.1007/s00442-002-1075-5 Sites: US-KS2

Oxygen Isotope Content Of CO2 In Nocturnal Ecosystem Respiration: 1. Observations In Forests Along A Precipitation Transect In Oregon, USA
Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., Ehleringer, J. R.

The oxygen isotope content of nocturnal ecosystem respiration (δ18OR) was examined in forests along a precipitation gradient in Oregon, USA, to determine whether site-to-site variation in δ18OR was more strongly related to variation in δ18O of precipitation or to evaporative …


Journal: Global Biogeochemical Cycles, Volume 17 (4): n/a-n/a (2003). DOI: 10.1029/2003gb002081 Sites: US-Me4

Increase Of Monoterpene Emissions From A Pine Plantation As A Result Of Mechanical Disturbances
Schade, G. W., Goldstein, A. H.

Mixing ratios and emission rates of monoterpenes were measured above a ponderosa pine plantation in the Sierra Nevada mountains before, during and after a pre-commercial thinning in spring 2000. The thinning removed and left onsite approximately one half of the plantations biomass. Monoterpene fluxes increased tenfold during the …


Journal: Geophysical Research Letters, Volume 30 (7): n/a-n/a (2003). DOI: 10.1029/2002gl016138 Sites: US-Blo

Interannual Variability In The Peatland-Atmosphere Carbon Dioxide Exchange At An Ombrotrophic Bog
Lafleur, P. M., Roulet, N. T., Bubier, J. L., Frolking, S., Moore, T. R.

Eddy covariance measurements of net ecosystem carbon dioxide (CO2) exchange (NEE) were taken at an ombrotrophic bog near Ottawa, Canada from 1 June 1998 to 31 May 2002. Temperatures during this period were above normal except for 2000 and precipitation was near normal in 1998 and 1999, above normal in 2000, and well below …


Journal: Global Biogeochemical Cycles, Volume 17 (2): n/a-n/a (2003). DOI: 10.1029/2002gb001983 Sites: CA-Mer

Modelling Carbon Balances Of Coastal Arctic Tundra Under Changing Climate
Grant, R. F., Oechel, W. C., Ping, C.

Rising air temperatures are believed to be hastening heterotrophic respiration (Rh) in arctic tundra ecosystems, which could lead to substantial losses of soil carbon …


Journal: Global Change Biology, Volume 9 (1): 16-36 (2003). DOI: 10.1046/j.1365-2486.2003.00549.x Sites: US-Brw

Inter-annual carbon dioxide uptake of a wet sedge tundra ecosystem in the Arctic
Harazono Y, Mano M, Miyata A, Zulueta RC, Oechel WC


Journal: Tellus, Volume 55B: 215-231 (2003). DOI: Sites: US-Cms