DOI: 10.1002/grl.50403
论文题名: The climatology of Australian tropical aerosol: Evidence for regional correlation
作者: Mitchell R.M. ; Forgan B.W. ; Campbell S.K. ; Qin Y.
刊名: Geophysical Research Letters
ISSN: 0094-9043
EISSN: 1944-8774
出版年: 2013
卷: 40, 期: 10 起始页码: 2384
结束页码: 2389
语种: 英语
英文关键词: aerosol climatology
; biomass burning
; Sun photometer
; tropical savanna
Scopus关键词: Aerosol optical depths
; Biomass-burning
; Correlation coefficient
; Global carbon cycle
; Highly-correlated
; Northern Australia
; Sun photometers
; tropical savanna
; Air quality
; Atmospheric aerosols
; Biomass
; Climate models
; Climatology
; Drought
; Photometers
; Photometry
; Atmospheric movements
; aerosol
; air quality
; atmospheric pollution
; biomass burning
; carbon cycle
; climatology
; correlation
; emission
; filter
; particle size
; photometer
; pollutant source
; proxy climate record
; regional climate
; savanna
; smoke
; spatial distribution
; tropical environment
; Australia
英文摘要: Biomass burning aerosols from the tropical savanna of Northern Australia constitute a globally significant aerosol source, with impacts on regional climate and air quality. Knowledge of the seasonal cycle and spatial distribution of this aerosol is required for its realistic representation in models of global climate, and to help define the role of this region in the global carbon cycle. This paper presents a decadal climatology of these aerosols, based on Sun photometer records from three stations in the Australian tropics, over the period 1998-2012. The monthly time series shows enhanced aerosol emissions following prodigious wet seasons, two of which occurred during the study period. The monthly climatology shows the expected peak during the late dry season (September-November), when most burning takes place, with clear evidence of the dominant modulating effect of fine-particle smoke emission apparent from the annual cycle of the Ångström exponent, a proxy for particle size. The aerosol levels during the early dry season are higher at the northern "Top End" stations than at the south-westerly Kimberley station. The time variation of aerosol optical depth is highly correlated between all three station pairs, with a correlation coefficient r 2> 0.75 at monthly resolution between all pairs. This high correlation between widely separated stations declines only gradually as the filtering interval is reduced, suggesting remarkably high coherence in the emission and transport of biomass burning aerosol across the entire region. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879954540&doi=10.1002%2fgrl.50403&partnerID=40&md5=c3605f7b4d036a97f741123fe7e8cb47
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6307
Appears in Collections: 气候减缓与适应
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作者单位: CSIRO Marine and Atmospheric Research, CSIRO Black Mountain Laboratories, GPO Box 3023, Canberra, ACT, Australia
Recommended Citation:
Mitchell R.M.,Forgan B.W.,Campbell S.K.,et al. The climatology of Australian tropical aerosol: Evidence for regional correlation[J]. Geophysical Research Letters,2013-01-01,40(10).