DOI: 10.1002/2016JD025737
论文题名: Sources and pathways of dust during the Australian “Millennium Drought” decade
作者: O'Loingsigh T. ; Chubb T. ; Baddock M. ; Kelly T. ; Tapper N.J. ; De Deckker P. ; McTainsh G.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 1246
结束页码: 1260
语种: 英语
英文关键词: Australia
; dust trajectories
; HYSPLIT
; METAR
; mineral aerosols
; Red Dawn
Scopus关键词: aerosol
; airport
; climatology
; drought
; dust storm
; ephemeral lake
; pollutant transport
; westerly
; Australia
; Lake Eyre Basin
; Mallee
; New South Wales
; Riverine Plain
; South Australia
; Victoria [Australia]
英文摘要: From the late 1990s to mid-2010, Australia was affected by a prolonged period of drought, the “Millennium Drought,” during which numerous severe dust storms crossed the continent. We inspect this period to produce the first continental-scale climatology of air-parcel trajectories that is specific to dust and use it to gain new insights into dust transport dynamics over the eastern half of Australia. The analysis is based upon dust arrival times from airport meteorological observations made at nine mostly coastal cities for 2000–2009. The Hybrid Single-Particle Lagrangian Integrated Trajectory model was used to calculate 1.26 million backward trajectories from receptor cities, with only those trajectories associated with a dust storm observation considered in the analysis of dust transport. To tie dust trajectories from receptors to likely emission sources, trajectories were linked to six known major dust source regions in and around the Lake Eyre Basin. The Lake Eyre North ephemeral lake system, alluvial-dominated Channel Country, and agricultural Mallee-Riverina regions emerge as important sources for the period, providing variable contributions to different parts of the seaboard as controlled by different front-related wind systems. Our study also provides new detail regarding dust pathways from continental Australia. For the Millennium Drought we identify that the broadly established Southeast Dust Path may be more accurately subdivided into three active pathways, driven by prefrontal northerly winds and a variation in the influence of frontal westerlies. The detail of these pathways has implications for dust delivery from specific Australian sources to different marine environments. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: DP0772180
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62747
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia; Department of Geography, Loughborough University, Loughborough, United Kingdom; Griffith School of the Environment, Griffith University, Nathan, QLD, Australia; Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
Recommended Citation:
O'Loingsigh T.,Chubb T.,Baddock M.,et al. Sources and pathways of dust during the Australian “Millennium Drought” decade[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)