AmeriFlux AmeriFlux US-Me2 Metolius-intermediate aged ponderosa pine

Dataset · Fri Jan 01 00:00:00 EST 2016

DOI:https://doi.org/10.17190/AMF/1246076· OSTI ID:1246076

Law, Bev ^[1]

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1. Oregon State University

This is the AmeriFlux version of the carbon flux data for the site US-Me2 Metolius-intermediate aged ponderosa pine. Site Description - Site Description before Fire (January, 2002 - August, 2020): The mean stand age is 71 years old and the stand age of the oldest 10% of trees is about 108 years old. This site is one of the Metolius core cluster sites with different age and disturbance classes and part of the AmeriFlux network. The overstory is almost exclusively composed of ponderosa pine trees (Pinus ponderosa Doug. Ex P. Laws) with a few scattered incense cedars (Calocedrus decurrens (Torr.) Florin) and has a peak leaf area index (LAI) of 2.1 m2 m-2. Tree height is relatively homogeneous at about 18 m, and the mean tree density is approximately 339 trees ha-1 (Irvine et al., 2008). The understory is sparse with an LAI of 0.2 m2 m-2 and primarily composed of bitterbrush (Purshia tridentata (Push) DC.) and greenleaf manzanita (Arctostaphylos patula Greene). Soils at the site are sandy (69%/24%/7% sand/silt/clay at 0–0.2 m depth and 66%/27%/7% at 0.2–0.5 m depth, and 54%/ 35%/11% at 0.5–1.0 m depth), freely draining with a soil depth of approximately 1.5 m (Irvine et al., 2008; Law et al., 2001b; Schwarz et al., 2004). Green Ridge Fire: On August 20, 2020, the Green Ridge Fire burned through Us-Me2. The fire was ignited by lightning on August 16th, and grew rapidly to the east over the first few days driven by strong, downslope (westerly) afternoon winds. Fire behavior and observed fire effects were highly heterogeneous due to the localized wind pattern carrying the flaming head of the fire forward, and the efforts being made by suppression resources to contain the fire. The site experienced the full range of fire effects, from <1 m high surface fire that charred litter and duff and only consumed shrubs and herbaceous material to full tree (>15 m) crown fire that consumed 100% of needles, small limbs, and surface fuels at high intensity, leaving only ash and bare soil post-fire. Salvage Logging: From late March to late April 2021, salvage logging by the landowner occurred at the site. Almost all trees within the flux footprint were logged except a small area with lower burn severity, where sap flow and automatic soil respiration measurements are continued since the fire.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). AmeriFlux; Oregon State Univ., Corvallis, OR (United States)
• Sponsoring Organization: DOE/TCP
• OSTI ID: 1246076
• Resource Relation: Related Information: Irvine J, Law BE, Martin JG, and Vickers D (2008) Interannual variation in soil CO2 efflux and the response of root respiration to climate and canopy gas exchange in mature ponderosa pine. Global Change Biology, 14(12), 2848-2859. Thomas, C. K., Law, B. E., Irvine, J., Martin, J. G., Pettijohn, J. C., and Davis, K. J., 2009. Seasonal hydrology explains inter-annual and seasonal variation in carbon and water exchange in a semi-arid mature Ponderosa Pine forest in Central Oregon, J. Geophys. Res. Biogeosciences (in press) Vickers, D., C.Thomas, and B.Law, 2009. Random and systematic CO2 flux sampling errors for tower measurements over forests in the convective boundary layer. Agric. Forest Meteorol. 149, 73-83 Vickers, D., J. Irvine, J.G. Martin, and B.E. Law. 2012. Nocturnal subcanopy flow regimes and missing carbon dioxide. Agric. Forest Meteorol. 152: 101-108. Vickers, Dean, Christoph K. Thomas , Jonathan G. Martin , Beverly Law. 2009.Self-correlation between assimilation and respiration resulting from flux partitioning of eddy-covariance CO2 fluxes. Agricultural and Forest Meteorology 149: 1552–1555. Irvine, J., B. E. Law, M. R. Kurpius, P. M. Anthoni, D. Moore and P. A. Schwarz. 2004. Age-related changes in ecosystem structure and function and effects on water and carbon exchange in ponderosa pine. Tree Physiology 24:753–763 Vickers, D., C. Thomas, C. Pettijohn, J.G. Martin, and B.E. Law. 2012. Five years of carbon fluxes and inherent water-use efficiency at two semi-arid pine forests with different disturbance histories. Tellus B 64: 17159. Vickers D., Goeckede M., and Law B. 2010. Uncertainty estimates for 1-hour averaged turbulence fluxes of carbon dioxide, latent heat and sensible heat. Tellus: Series B 62: 87-99.
• Country of Publication: United States
• Language: English