Publications

Publications Found: 1397

Wildfire Reduces Carbon Dioxide Efflux And Increases Methane Uptake In Ponderosa Pine Forest Soils Of The Southwestern USA
Sullivan, B. W., Kolb, T. E., Hart, S. C., Kaye, J. P., Hungate, B. A., Dore, S., Montes-Helu, M.

Severe wildfire may cause long-term changes in the soil-atmosphere exchange of carbon dioxide and methane, two gases known to force atmospheric warming. We examined the effect of a severe wildfire 10 years after burning to determine decadal-scale changes in soil gas fluxes following fire, and explored mechanisms responsible for …


Journal: Biogeochemistry, Volume 104 (1-3): 251-265 (2011). DOI: 10.1007/s10533-010-9499-1 Sites: US-Fuf, US-Fwf

Seasonal Pattern Of Regional Carbon Balance In The Central Rocky Mountains From Surface And Airborne Measurements
Desai, A.R., Moore, D.J.P., Ahue, W.K.M., Wilkes, P.T.V., De Wekker, S.F.J., Brooks, B.G., Campos, T.L., Stephens, B.B., Monson, R.K., Burns, S.P., Quaife, T., Aulenbach, S.M., Schimel, D.S.

High-elevation forests represent a large fraction of potential carbon uptake in North America, but this uptake is not well constrained by observations. Additionally, forests in the Rocky Mountains have recently been severely damaged by drought, fire, and insect outbreaks, which have been quantified at local scales but not assessed …


Journal: Journal Of Geophysical Research, Volume 116 (G04009): 1-16 (2011). DOI: 10.1029/2011JG001655 Sites: US-NR1

Large Greenhouse Gas Emissions From A Temperate Peatland Pasture
Teh, Y. A., Silver, W. L., Sonnentag, O., Detto, M., Kelly, M., Baldocchi, D. D.

Agricultural drainage is thought to alter greenhouse gas emissions from temperate peatlands, with CH4 emissions reduced in favor of greater CO2 losses. Attention has largely focussed on C trace gases, and less is known about the impacts …


Journal: Ecosystems, Volume 14 (2): 311-325 (2011). DOI: 10.1007/s10021-011-9411-4 Sites: US-Snd

The Influence Of Carbon Exchange Of A Large Lake On Regional Tracer-Transport Inversions: Results From Lake Superior
Vasys, V. N., Desai, A. R., McKinley, G. A., Bennington, V., Michalak, A. M., Andrews, A. E.

Large lakes may constitute a significant component of regional surface–atmosphere fluxes, but few efforts have been made to quantify these fluxes. Tracer-transport inverse models that infer the CO2 flux from the atmospheric concentration typically assume that the influence from large lakes is negligible. CO2


Journal: Environmental Research Letters, Volume 6 (3): n/a-n/a (2011). DOI: 10.1088/1748-9326/6/3/034016 Sites: US-PFa

Comparing Laser-Based Open- And Closed-Path Gas Analyzers To Measure Methane Fluxes Using The Eddy Covariance Method
Detto, M., Verfaillie, J., Anderson, F., Xu, L., Baldocchi, D.

Closed- and open-path methane gas analyzers are used in eddy covariance systems to compare three potential methane emitting ecosystems in the Sacramento-San Joaquin Delta (CA, USA): a rice field, a peatland pasture and a restored wetland. The study points out similarities …


Journal: Agricultural And Forest Meteorology, Volume 151 (10): 1312-1324 (2011). DOI: 10.1016/j.agrformet.2011.05.014 Sites: US-Snd

Light-Stress Avoidance Mechanisms In A Sphagnum-Dominated Wet Coastal Arctic Tundra Ecosystem In Alaska
Zona, D., Oechel, W. C., Richards, J. H., Hastings, S., Kopetz, I., Ikawa, H., Oberbauer, S.

The Arctic experiences a high-radiation environment in the summer with 24-hour daylight for more than two months. Damage to plants and ecosystem metabolism can be muted by overcast conditions common in much of the Arctic. However, with climate change, extreme dry years and clearer skies could lead to the risk of increased photoxidation …


Journal: Ecology, Volume 92 (3): 633-644 (2011). DOI: 10.1890/10-0822.1 Sites: US-Bes

Characteristics Of The Flux Of Isoprene And Its Oxidation Products In An Urban Area
Park, C., Schade, G. W., Boedeker, I.

We measured the mixing ratios and fluxes of isoprene and its oxidation products, methacrolein (MACR) and methyl vinyl ketone (MVK) from a tall flux tower in metropolitan Houston, Texas, during summertime using a relaxed eddy accumulation (REA) system combined with a dual-channel GC-FID instrument. We show that isoprene was affected …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 116 (D21): n/a-n/a (2011). DOI: 10.1029/2011jd015856 Sites: US-Ylw

Atmospheric Stability Effects On Wind Fields And Scalar Mixing Within And Just Above A Subalpine Forest In Sloping Terrain
Burns, S. P., Sun, J., Lenschow, D. H., Oncley, S. P., Stephens, B. B., Yi, C., Anderson, D. E., Hu, J., Monson, R. K.

Air temperature Ta, specific humidity q, CO2 mole fraction χJournal: Boundary-Layer Meteorology, Volume 138 (2): 231-262 (2011). DOI: 10.1007/s10546-010-9560-6 Sites: US-NR1


An Interannual Assessment Of The Relationship Between The Stable Carbon Isotopic Composition Of Ecosystem Respiration And Climate In A High-Elevation Subalpine Forest
Riveros-Iregui, D.A., Hu, J., Burns, S.P., Bowling, D.R., Monson, R.K.

We measured the carbon isotopic composition (δ13C) of ecosystem respiration (δ13CR) in a subalpine forest across four growing seasons to examine whether patterns in δ13CR were consistent with those expected based on leaf-level gas-exchange theory, …


Journal: Journal Of Geophysical Research, Volume 116 (G2): 1-15 (2011). DOI: 10.1029/2010JG001556 Sites: US-NR1

Tracking The Structural And Functional Development Of A Perennial Pepperweed (Lepidium Latifolium L.) Infestation Using A Multi-Year Archive Of Webcam Imagery And Eddy Covariance Measurements
Sonnentag, O., Detto, M., Vargas, R., Ryu, Y., Runkle, B., Kelly, M., Baldocchi, D.

The continued spread of invasive weeds is threatening ecosystem health throughout North America. Understanding the relationships between invasive weeds’ key phenological phases and structural and/or functional canopy development is an essential step for making …


Journal: Agricultural And Forest Meteorology, Volume 151 (7): 916-926 (2011). DOI: 10.1016/j.agrformet.2011.02.011 Sites: US-Snd