气候变化领域集成服务门户(CCPortal): Impacts of an intense wildfire smoke episode on surface radiation; energy and carbon fluxes in southwestern British Columbia; Canada

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DOI	10.5194/acp-19-835-2019
	Impacts of an intense wildfire smoke episode on surface radiation; energy and carbon fluxes in southwestern British Columbia; Canada
	McKendry I.G.; Christen A.; Lee S.-C.; Ferrara M.; Strawbridge K.B.; O'Neill N.; Black A.
发表日期	2019
ISSN	16807316
起始页码	835
结束页码	846
卷号	19 期号:2
英文摘要	A short, but severe, wildfire smoke episode in July 2015, with an aerosol optical depth (AOD) approaching 9, is shown to strongly impact radiation budgets across four distinct land-use types (forest, field, urban and wetland). At three of the sites, impacts on the energy balance are also apparent, while the event also appears to elicit an ecosystem response with respect to carbon fluxes at the wetland and a forested site. Greatest impacts on radiation and energy budgets were observed at the forested site where the role of canopy architecture and the complex physiological responses to an increase in diffuse radiation were most important. At the forest site, the arrival of smoke reduced both sensible and latent heat flux substantially but also lowered sensible heat flux more than the latent heat flux. With widespread standing water, and little physiological control on evapotranspiration, the impacts on the partitioning of turbulent fluxes were modest at the wetland compared to the physiologically dominated fluxes at the forested site. Despite the short duration and singular nature of the event, there was some evidence of a diffuse radiation fertilization effect when AOD was near or below 2. With lighter smoke, both the wetland and forested site appeared to show enhanced photosynthetic activity (a greater sink for carbon dioxide). However, with dense smoke, the forested site was a strong carbon source. Given the extensive forest cover in the Pacific Northwest and the growing importance of forest fires in the region, these results suggest that wildfire aerosol during the growing season potentially plays an important role in the regional ecosystem response to smoke and ultimately the carbon budget of the region. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; carbon flux; ecosystem response; energy balance; latent heat flux; optical depth; pollution effect; radiation budget; sensible heat flux; smoke; wildfire; British Columbia; Canada
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144707
作者单位	Department of Geography, University of British Columbia, Vancouver, Canada; Environmental Meteorology, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, 9085, Germany; Air Quality Research Division, Environment Canada, 4905 Dufferin St, Toronto, Canada; Centre for Research and Applications in Remote Sensing, Université de Sherbrooke, Sherbrooke, Canada; Faculty of Land and Food Systems, University of British Columbia, Vancouver, Canada
推荐引用方式 GB/T 7714	McKendry I.G.,Christen A.,Lee S.-C.,et al. Impacts of an intense wildfire smoke episode on surface radiation; energy and carbon fluxes in southwestern British Columbia; Canada[J],2019,19(2).
APA	McKendry I.G..,Christen A..,Lee S.-C..,Ferrara M..,Strawbridge K.B..,...&Black A..(2019).Impacts of an intense wildfire smoke episode on surface radiation; energy and carbon fluxes in southwestern British Columbia; Canada.Atmospheric Chemistry and Physics,19(2).
MLA	McKendry I.G.,et al."Impacts of an intense wildfire smoke episode on surface radiation; energy and carbon fluxes in southwestern British Columbia; Canada".Atmospheric Chemistry and Physics 19.2(2019).