Publications Found: 9
Extreme Late-Summer Drought Causes Neutral Annual Carbon Balance In Southwestern Ponderosa Pine Forests And Grasslands
Kolb, T., Dore, S., Montes-Helu, M.

We assessed the impacts of extreme late-summer drought on carbon balance in a semi-arid forest region in Arizona. To understand drought impacts over extremes of forest cover, we measured net ecosystem production (NEP), gross primary production (GPP), and total ecosystem respiration (TER) with eddy covariance over five years (2006–10) …

Journal: Environmental Research Letters, Volume 8 (1): n/a-n/a (2013). DOI: 10.1088/1748-9326/8/1/015015 Sites: US-Fuf, US-Fwf

Pulse Emissions Of Carbon Dioxide During Snowmelt At A High-Elevation Site In Northern Arizona, U.S.A.
Sullivan, B. W., Dore, S., Montes-Helu, M. C., Kolb, T. E., Hart, S. C.

The paradigm that winter is a dormant period of soil biogeochemical activity in high elevation or high latitude ecosystems has been amply refuted by recent research. Carbon dioxide (CO2) released from cold or snow-covered soil is a substantial component of total annual ecosystem carbon fluxes. Recent investigations have …

Journal: Arctic, Antarctic, And Alpine Research, Volume 44 (2): 247-254 (2012). DOI: 10.1657/1938-4246-44.2.247 Sites: US-Fwf

Recovery Of Ponderosa Pine Ecosystem Carbon And Water Fluxes From Thinning And Stand-Replacing Fire
Dore, S., Montes-Helu, M., Hart, S. C., Hungate, B. A., Koch, G. W., Moon, J. B., Finkral, A. J., Kolb, T. E.

Journal: Global Change Biology, Volume 18 (10): 3171-3185 (2012). DOI: 10.1111/j.1365-2486.2012.02775.x Sites: US-Fmf, US-Fuf, US-Fwf

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

Evaluation Of Methods For Estimating Soil Carbon Dioxide Efflux Across A Gradient Of Forest Disturbance
Sullivan, B. W., Dore, S., Kolb, T. E., Hart, S. C., Montes-Helu, M. C.

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

Carbon And Water Fluxes From Ponderosa Pine Forests Disturbed By Wildfire And Thinning
Dore, S., Kolb, T. E., Montes-Helu, M., Eckert, S. E., Sullivan, B. W., Hungate, B. A., Kaye, J. P., Hart, S. C., Koch, G. W., Finkral, A.

Disturbances alter ecosystem carbon dynamics, often by reducing carbon uptake and stocks. We compared the impact of two types of disturbances that represent the most likely future conditions of currently …

Journal: Ecological Applications, Volume 20 (3): 663-683 (2010). DOI: 10.1890/09-0934.1 Sites: US-Fmf, US-Fuf, US-Fwf

Ecosystem Carbon Dioxide Fluxes After Disturbance In Forests Of North America
Amiro, B. D., Barr, A. G., Barr, J. G., Black, T. A., Bracho, R., Brown, M., Chen, J., Clark, K. L., Davis, K. J., Desai, A. R., Dore, S., Engel, V., Fuentes, J. D., Goldstein, A. H., Goulden, M. L., Kolb, T. E., Lavigne, M. B., Law, B. E., Margolis, H. A., Martin, T., McCaughey, J. H., Misson, L., Montes-Helu, M., Noormets, A., Randerson, J. T., Starr, G., Xiao, J.

Disturbances are important for renewal of North American forests. Here we summarize more than 180 site years of eddy covariance measurements of carbon dioxide flux made at forest chronosequences in North America. The disturbances included stand-replacing fire (Alaska, Arizona, Manitoba, and Saskatchewan) and harvest (British Columbia, …

Journal: Journal Of Geophysical Research, Volume 115 (G00K02): n/a-n/a (2010). DOI: 10.1029/2010JG001390 Sites: US-Fmf, US-Fuf, US-Fwf

Persistent Effects Of Fire-Induced Vegetation Change On Energy Partitioning And Evapotranspiration In Ponderosa Pine Forests
Montes-Helu, M., Kolb, T., Dore, S., Sullivan, B., Hart, S., Koch, G., Hungate, B.

We compared energy fluxes between a site converted from ponderosa pine (Pinus ponderosa) forest to sparse grassland by a severe wildfire 10 years ago and a nearby, unburned forest. We used eddy covariance and associated instruments to measure total radiation, net radiation, albedo, and fluxes of energy into latent heat, …

Journal: Agricultural And Forest Meteorology, Volume 149 (3-4): 491-500 (2009). DOI: 10.1016/j.agrformet.2008.09.011 Sites: US-Fuf, US-Fwf

Long-Term Impact Of A Stand-Replacing Fire On Ecosystem CO2 Exchange Of A Ponderosa Pine Forest
Dore, S., Kolb, T. E., Montes-Helu, M., Sullivan, B. W., Winslow, W. D., Hart, S. C., Kaye, J. P., Koch, G. W., Hungate, B. A.

Ponderosa pine (Pinus ponderosa) forests of the southwestern United States are a mosaic of stands where undisturbed forests are carbon sinks, and stands recovering from wildfires may be sources of carbon to the atmosphere for decades after the fire. However, the relative magnitude of these sinks and sources has never been …

Journal: Global Change Biology, Volume 14 (8): 1801-1820 (2008). DOI: 10.1111/j.1365-2486.2008.01613.x Sites: US-Fuf, US-Fwf