DOI: 10.1002/2015GL063179
论文题名: On the presence of giant particles downwind of ships in the marine boundary layer
作者: Sorooshian A. ; Prabhakar G. ; Jonsson H. ; Woods R.K. ; Flagan R.C. ; Seinfeld J.H.
刊名: Geophysical Research Letters
ISSN: 0094-8874
EISSN: 1944-8605
出版年: 2015
卷: 42, 期: 6 起始页码: 2024
结束页码: 2030
语种: 英语
英文关键词: aerosol
; giant CCN
; marine boundary layer
; sea salt
; shipping
; stratocumulus
Scopus关键词: Aerosols
; Boundary layers
; Freight transportation
; Precipitation (meteorology)
; Wakes
; Waterway transportation
; Cloud condensation nuclei
; Enhancement ratios
; giant CCN
; Marine boundary layers
; Number concentration
; Particle number concentration
; Sea salts
; stratocumulus
; Ships
; boundary layer
; cloud condensation nucleus
; concentration (composition)
; correlation
; marine atmosphere
; particle size
; precipitation quality
; sea salt
英文摘要: This study examines large oceangoing ships as a source of giant cloud condensation nuclei (Dp>2μm) due to wake and stack emissions off the California coast. Observed particle number concentrations behind 10 ships exceeded those in "control" areas, exhibiting number concentration enhancement ratios (ERs) for minimum threshold diameters of ∼2, ∼10, and ∼20μm as high as 2.7, 5.5, and 7.5, respectively. ER decreases with increasing downwind distance and altitude. ER becomes better correlated with ship size variables (gross tonnage, length, and beam) as the minimum size threshold increases from 2 to 20μm, whereas ship speed has a less distinct relationship with ER. One case study of a container ship shows that there are higher concentrations of sea-salt tracer species behind it relative to adjacent control areas. These results have implications for cloud properties and precipitation in marine boundary layers exposed to ship traffic. Key Points Field evidence of giant particle (GCCN) emissions by stack and wake of ships GCCN emissions closely related to ship size, especially for larger particles Evidence of sea-salt enhancement behind a ship ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927729123&doi=10.1002%2f2015GL063179&partnerID=40&md5=800f6b972e9503b8abe2d70c076da47a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8490
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States
Recommended Citation:
Sorooshian A.,Prabhakar G.,Jonsson H.,et al. On the presence of giant particles downwind of ships in the marine boundary layer[J]. Geophysical Research Letters,2015-01-01,42(6).