Decoupling atmospheric and oceanic factors affecting aerosol loading over a cluster of mesoscale North Atlantic eddies

Yoav Lehahn, Ilan Koren, Yinon Rudich, Kay D. Bidle, Miri Trainic, Jorge Michel Flores, Shlomit Sharoni, Assaf Vardi

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Using shipboard and satellite measurements we explore the environmental factors affecting the number concentration of aerosols with diameter 100<D<1000nm over a cluster of three mesoscale (~10-100km) eddies in the North Atlantic. Strongest sensitivity to environmental conditions was found in the 400<D<1000nm size range. In this size range particle concentrations were closely linked to the surface wind speed, indicating in situ production of sea spray aerosols by wind-driven processes. Particle concentrations were also affected by mesoscale variability in oceanic conditions at the vicinity of an anticyclonic eddy. In addition, a distinct aerosol population possibly produced at a distance of ~1000-2000km from the study area was identified. The results highlight the importance of oceanic and atmospheric mesoscale processes in determining the characteristics of aerosols over the marine environment.

Original languageEnglish (US)
Pages (from-to)4075-4081
Number of pages7
JournalGeophysical Research Letters
Volume41
Issue number11
DOIs
StatePublished - 2014

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Keywords

  • North Atlantic
  • atmospheric mesoscale
  • mesoscale eddies
  • sea spray aerosols

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