Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study


Seguret M. J. M., KOÇAK M., Theodosi C., Ussher S. J., Worsfold P. J., Herut B., ...Daha Fazla

MARINE CHEMISTRY, cilt.126, ss.229-238, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 126
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.marchem.2011.05.007
  • Dergi Adı: MARINE CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.229-238
  • Anahtar Kelimeler: Aerosol iron, Dissolution, Kinetic, FI-CL, Levantine Basin, LEVANTINE BASIN, TRACE-METALS, MINERAL DUST, CHEMILUMINESCENCE DETECTION, ATMOSPHERIC DEPOSITION, TEMPORAL VARIABILITY, PHYTOPLANKTON BLOOM, ATLANTIC-OCEAN, FLOW-INJECTION, SEA
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We report seawater dissolution experiments for aerosol samples simultaneously collected (October 2007) across the Levantine Basin (LB, Eastern Mediterranean Sea), a marine system influenced by seasonal atmospheric inputs. Two distinct populations exhibited contrasting kinetic profiles; those representative of strong Saharan dust events which had variable iron release profiles with a maximum solubility of 0.94 +/- 1.48% (1 s.d.) whereas those which had a relatively greater anthropogenic influence had consistent profiles (fast release, <= 2 h, of dissolved iron in seawater followed by removal) with a maximum solubility of 11.5 +/- 9.3% (1 s.d.). First estimates of atmospheric fluxes of soluble iron are presented, ranging from 8.64 +/- 10.76 mg m(-2) y(-1) for the Northern LB to 6.48 +/- 7.78 mg m(-2) y(-1) for the Southern LB. Estimates of Fe fluxes to oceanic basins are important for constraining the global iron budget, and dust dissolution kinetic profiles provide information on the mechanisms involved during the release of aerosol Fe in seawater post atmospheric deposition. Published by Elsevier B.V.