DOI: 10.1002/2015GL066641
论文题名: Chemistry-turbulence interactions and mesoscale variability influence the cleansing efficiency of the atmosphere
作者: Kaser L. ; Karl T. ; Yuan B. ; Mauldin R.L. ; III ; Cantrell C.A. ; Guenther A.B. ; Patton E.G. ; Weinheimer A.J. ; Knote C. ; Orlando J. ; Emmons L. ; Apel E. ; Hornbrook R. ; Shertz S. ; Ullmann K. ; Hall S. ; Graus M. ; De Gouw J. ; Zhou X. ; Ye C.
刊名: Geophysical Research Letters
ISSN: 0094-8281
EISSN: 1944-8012
出版年: 2015
卷: 42, 期: 24 起始页码: 10894
结束页码: 10903
语种: 英语
英文关键词: fluxes
; hydroxyl radical
; isoprene
; turbulence
Scopus关键词: Atmospheric chemistry
; Boundary layers
; Budget control
; Fluxes
; Free radicals
; Iodine
; Isoprene
; Surface properties
; Surface segregation
; Turbulence
; Volatile organic compounds
; Atmospheric oxidation capacity
; Hydroxyl radicals
; Intensity of segregation
; Mesoscale variability
; Physical separation
; Planetary boundary layers
; Surface heterogeneities
; Turbulence interactions
; Atmospheric thermodynamics
; biogenic emission
; boundary layer
; flux measurement
; heterogeneity
; hydroxyl radical
; isoprene
; mesoscale meteorology
; oxidation
; turbulence
; volatile organic compound
; United States
英文摘要: The hydroxyl radical (OH) is the most important oxidant in the atmosphere and the primary sink for isoprene, the dominant volatile organic compound emitted by vegetation. Recent research on the atmospheric oxidation capacity in isoprene-dominated environments has suggested missing radical sources leading to significant overestimation of the lifetime of isoprene. Here we report, for the first time, a comprehensive experimental budget of isoprene in the planetary boundary layer based on airborne flux measurements along with in situ OH observations in the Southeast and Central U.S. Our findings show that surface heterogeneity of isoprene emissions lead to a physical separation of isoprene and OH resulting in an effective slowdown in the chemistry. Depending on surface heterogeneity, the intensity of segregation (Is) could locally slow down isoprene chemistry up to 30%. The effect of segregated reactants in the planetary boundary layer on average has an influence on modeled OH radicals that is comparable to that of recently proposed radical recycling mechanisms. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955186650&doi=10.1002%2f2015GL066641&partnerID=40&md5=a0d034a2e928271ddb1ea9db539b34b8
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7897
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Kaser L.,Karl T.,Yuan B.,et al. Chemistry-turbulence interactions and mesoscale variability influence the cleansing efficiency of the atmosphere[J]. Geophysical Research Letters,2015-01-01,42(24).