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  The importance of Harmattan surges for the emission of North African dust aerosol

Fiedler, S., Kaplan, M. E., & Knippertz, P. (2015). The importance of Harmattan surges for the emission of North African dust aerosol. Geophysical Research Letters, 42, 9495-9504. doi:10.1002/2015GL065925.

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 Creators:
Fiedler, Stephanie1, Author           
Kaplan, Michael E., Author
Knippertz, P., Author
Affiliations:
1Director’s Research Group AES, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913570              

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Free keywords: Climatology; Dust emission; ERA-Interim; Harmattan; North Africa; Synoptic-scale storms
 Abstract: Dust aerosol is important in the Earth system, but the relative impact of meteorological mechanisms on North African dust emission remains unclear. This study presents the first climatology of dust emission amounts associated with Harmattan surges (HSs), characterized by postfrontal strengthening of near-surface winds. A new automated identification uses their strong isallobaric winds as an indicator for HSs in 32 years of ERA-Interim reanalysis. Their impact on dust aerosol emission is estimated by combining the identified events with derived dust emissions. The estimate highlights that about one third of the total emission mass is associated with HSs. Spring shows the largest associated emissions of 30-50% of the monthly totals consistent with the largest number and duration of HSs. Regional emission contributions of up to 80% in the north coincide with the overall largest emission maxima in spring. The importance of HSs for dust emission implies that aerosol-climate models need to accurately represent synoptic-scale storms. © 2015. American Geophysical Union. All Rights Reserved.

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Language(s): eng - English
 Dates: 2015-072015-10-292015-11-072015-11-16
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/2015GL065925
 Degree: -

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Project name : Desert Storms
Grant ID : 257543
Funding program : (257543)
Funding organization : European Research Council (ERC)

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Title: Geophysical Research Letters
  Abbreviation : GRL
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 42 Sequence Number: - Start / End Page: 9495 - 9504 Identifier: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217