The Atlantic Ocean surface microlayer from 50°N to 50°S is ubiquitously enriched in surfactants at wind speeds up to 13 m s−1

B. Sabbaghzadeh, R. C. Upstill-Goddard, R. Beale, Ryan Pereira, Philip D. Nightingale

Research output: Contribution to journalArticle

23 Citations (Scopus)
39 Downloads (Pure)

Abstract

We report the first measurements of surfactant activity (SA) in the sea surface microlayer (SML) and in subsurface waters (SSW) at the ocean basin scale, for two Atlantic Meridional Transect from cruises 50°N to 50°S during 2014 and 2015. Northern Hemisphere (NH) SA was significantly higher than Southern Hemisphere (SH) SA in the SML and in the SSW. SA enrichment factors (EF = SASML/SASSW) were also higher in the NH, for wind speeds up to ~13 m s−1, questioning a prior assertion that Atlantic Ocean wind speeds >12 m s−1 poleward of 30°N and 30°S would preclude high EFs and showing the SML to be self-sustaining with respect to SA. Our results imply that surfactants exert a control on air-sea CO2 exchange across the whole North Atlantic CO2 sink region and that the contribution made by high wind, high latitude oceans to air-sea gas exchange globally should be reexamined.

Original languageEnglish
Pages (from-to)2852-2858
Number of pages7
JournalGeophysical Research Letters
Volume44
Issue number6
Early online date20 Mar 2017
DOIs
Publication statusPublished - 28 Mar 2017

Keywords

  • air-sea exchange
  • AMT
  • enrichment factor
  • surface microlayer
  • surfactant

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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