DOI: 10.1016/j.atmosenv.2015.09.051
Scopus记录号: 2-s2.0-84944453051
论文题名: Observed aerosol-induced radiative effect on plant productivity in the eastern United States
作者: Strada S ; , Unger N ; , Yue X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 463
结束页码: 476
语种: 英语
英文关键词: Aerosols
; Diffuse light
; Eastern U.S.
; FLUXNET
; MODIS 3-km AOD
; Plant productivity
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Crops
; Forestry
; Light scattering
; Satellite imagery
; Diffuse light
; Eastern U.S
; FluxNet
; MODIS 3-km AOD
; Plant productivity
; Atmospheric aerosols
; carbon
; aerosol
; canopy architecture
; deciduous forest
; flux measurement
; grassland
; growing season
; light scattering
; mixed forest
; MODIS
; optical depth
; pollution effect
; radiative forcing
; aerosol
; aerosol optical depth
; agricultural parameters
; air temperature
; arithmetic
; Article
; atmospheric deposition
; canopy
; circadian rhythm
; cropland
; deciduous plant
; ecosystem
; evergreen
; forest
; grassland
; gross primary productivity
; growing season
; light scattering
; optical depth
; plant productivity
; priority journal
; United States
; vapor pressure
; water availability
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: We apply satellite observations of aerosol optical depth (AOD) in conjunction with flux tower-derived estimates of gross primary productivity (GPP) to probe the relationship between atmospheric aerosol loading and carbon uptake rate at 10 select sites (4 deciduous broadleaf, 3 cropland, 1 evergreen needle leaf, 1 mixed forest and 1 grassland) on hourly time scales in the growing season in the eastern United States. For deciduous and mixed forests, the aerosol light scattering increases GPP with a maximum effect observed under polluted conditions (AOD >0.6), when diffuse radiation is 40-60%. During midday hours, high AOD conditions (>0.4) enhance plant productivity by ~13% in deciduous forests. In contrast, we find that high diffuse light fraction does not increase the carbon uptake rate in croplands and grasslands; for these ecosystems, we estimate that high AOD conditions reduce GPP by ~17% during midday hours. Our findings are consistent with previous studies that have attributed these contrasting response sensitivities to the complex and closed canopy architecture of forests versus crops and grasslands. C4 but not C3 crops may benefit from pollution-induced changes in diffuse and direct light. Further research is needed to investigate the role of local meteorology as a possible confounder in the connection between atmospheric aerosols and plant productivity. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81394
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Yale University, School of Forestry and Environmental Studies, 195 Prospect Street, New Haven, CT, United States; Laboratoire des Sciences du Climat et de l'Environnement, L'Orme des Merisiers - Bat 712, Gif Sur Yvette, France
Recommended Citation:
Strada S,, Unger N,, Yue X. Observed aerosol-induced radiative effect on plant productivity in the eastern United States[J]. Atmospheric Environment,2015-01-01,122