Postfire influences of snag attrition on albedo and radiative forcing
Abstract
Abstract This paper examines albedo perturbation and radiative forcing after a high‐severity fire in a mature forest in the Oregon Cascade Range. Correlations between postfire albedo and seedling, sapling, and snag (standing dead tree) density were investigated across fire severity classes and seasons for years 4–15 after fire. Albedo perturbation was 14 times larger in winter compared to summer and increased with fire severity class for the first several years. Albedo perturbation increased linearly with time over the study period. Correlations between albedo perturbations and the vegetation densities were strongest with snags, and significant in all fire classes in both summer and winter ( R < −0.92, p < 0.01). The resulting annual radiative forcing at the top of the atmosphere became more negative linearly at a rate of −0.86 W m −2 yr −1 , reaching −15 W m −2 in year 15 after fire. This suggests that snags can be the dominant controller of postfire albedo on decadal time scales.
- Authors:
-
- Department of Environmental Science Sweet Briar College Sweet Briar Virginia USA
- U.S. Forest Service, Willamette National Forest Springfield Oregon USA
- U.S. Forest Service, Siuslaw National Forest Corvallis Oregon USA
- College of Forestry Oregon State University Corvallis Oregon USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1402257
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Name: Geophysical Research Letters Journal Volume: 41 Journal Issue: 24; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union (AGU)
- Country of Publication:
- United States
- Language:
- English
Citation Formats
O'Halloran, Thomas L., Acker, Steven A., Joerger, Verena M., Kertis, Jane, and Law, Beverly E. Postfire influences of snag attrition on albedo and radiative forcing. United States: N. p., 2014.
Web. doi:10.1002/2014GL062024.
O'Halloran, Thomas L., Acker, Steven A., Joerger, Verena M., Kertis, Jane, & Law, Beverly E. Postfire influences of snag attrition on albedo and radiative forcing. United States. https://doi.org/10.1002/2014GL062024
O'Halloran, Thomas L., Acker, Steven A., Joerger, Verena M., Kertis, Jane, and Law, Beverly E. Tue .
"Postfire influences of snag attrition on albedo and radiative forcing". United States. https://doi.org/10.1002/2014GL062024.
@article{osti_1402257,
title = {Postfire influences of snag attrition on albedo and radiative forcing},
author = {O'Halloran, Thomas L. and Acker, Steven A. and Joerger, Verena M. and Kertis, Jane and Law, Beverly E.},
abstractNote = {Abstract This paper examines albedo perturbation and radiative forcing after a high‐severity fire in a mature forest in the Oregon Cascade Range. Correlations between postfire albedo and seedling, sapling, and snag (standing dead tree) density were investigated across fire severity classes and seasons for years 4–15 after fire. Albedo perturbation was 14 times larger in winter compared to summer and increased with fire severity class for the first several years. Albedo perturbation increased linearly with time over the study period. Correlations between albedo perturbations and the vegetation densities were strongest with snags, and significant in all fire classes in both summer and winter ( R < −0.92, p < 0.01). The resulting annual radiative forcing at the top of the atmosphere became more negative linearly at a rate of −0.86 W m −2 yr −1 , reaching −15 W m −2 in year 15 after fire. This suggests that snags can be the dominant controller of postfire albedo on decadal time scales.},
doi = {10.1002/2014GL062024},
journal = {Geophysical Research Letters},
number = 24,
volume = 41,
place = {United States},
year = {Tue Dec 16 00:00:00 EST 2014},
month = {Tue Dec 16 00:00:00 EST 2014}
}
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