Size-resolved characterization of the polysaccharidic and proteinaceous components of sea spray aerosol

被引:74
作者
Aller, Josephine Y. [1 ]
Radway, Joann C. [1 ]
Kilthau, Wendy P. [1 ]
Bothe, Dylan W. [1 ]
Wilson, Theodore W. [2 ,7 ]
Vaillancourt, Robert D. [3 ]
Quinn, Patricia K. [4 ]
Coffman, Derek J. [4 ]
Murray, Benjamin J. [5 ]
Knopf, Daniel A. [1 ,6 ]
机构
[1] SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA
[2] Univ Leeds, Sch Earth & Environm, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England
[3] Millersville Univ Pennsylvania, Dept Earth Sci, Millersville, PA 17551 USA
[4] Natl Ocean & Atmospher Adm, Pacific Marine Environm Lab, Seattle, WA 98115 USA
[5] Univ Leeds, Sch Earth & Environm, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England
[6] SUNY Stony Brook, Sch Marine & Atmospher Sci, Inst Terr & Planetary Atmospheres, Stony Brook, NY 11794 USA
[7] Owlstone Med Ltd, Cambridge CB4 0GD, England
基金
欧洲研究理事会; 英国自然环境研究理事会; 美国国家科学基金会;
关键词
Sea surface microlayer; Transparent exopolymer material; Protein-containing gel particles; Sea spray aerosol; MOUDI; TRANSPARENT EXOPOLYMER PARTICLES; PRIMARY MARINE AEROSOL; CENTRAL ARCTIC-OCEAN; EXPERIMENT ACE 1; ORGANIC-MATTER ENRICHMENT; ICE-NUCLEATING PARTICLES; DYE-BINDING ASSAY; SURFACE MICROLAYER; BOUNDARY-LAYER; ATMOSPHERIC PARTICLES;
D O I
10.1016/j.atmosenv.2017.01.053
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dissolved organic polymers released by phytoplankton and bacteria abiologically self-assemble in surface ocean waters into nano-to micro-sized gels containing polysaccharides, proteins, lipids and other components. These gels concentrate in the sea surface microlayer (SML), where they can potentially contribute to sea spray aerosol (SSA). Sea spray is a major source of atmospheric aerosol mass over much of the earth's surface, and knowledge of its properties (including the amount and nature of the organic content), size distributions and fluxes are fundamental for determining its role in atmospheric chemistry and climate. Using a cascade impactor, we collected size-fractionated aerosol particles from ambient air and from freshly generated Sea Sweep SSA in the western North Atlantic Ocean together with biological and chemical characterization of subsurface and SML waters. Spectrophotometric methods were applied to quantify the polysaccharide-containing transparent exopolymer (TEP) and protein-containing Coomassie stainable material (CSM) in these particles and waters. This study demonstrates that both TEP and CSM in surface ocean waters are aerosolized with sea spray with the greatest total TEP associated with particles <180 nm in diameter and >5 000 nm. The higher concentrations of TEP and CSM in particles >5 000 nm most likely reflects collection of microorganism cells and/or fragments. The greater concentration of CSM in larger size particles may also reflect greater stability of proteinaceous gels compared to polysaccharide-rich gels in surface waters and the SML. Both TEP and CSM were measured in the ambient marine air sample with concentrations of 2.1 +/- 0.16 mu g xanthan gum equivalents (XG eq.) m(-3) and 14 +/- 1.0 mu g bovine serum albumin equivalents (BSA eq.) m(-3). TEP in Sea Sweep SSA averaged 4.7 +/- 3.1 mu g XG eq. m(-)3 and CSM 8.6 +/- 7.3 mu g BSA eq. m(-3). This work shows the transport of marine biogenic material across the air-sea interface through primary particle emission and the first demonstration of particle size discriminated TEP and CSM characterization of SSA and ambient aerosol under field conditions. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:331 / 347
页数:17
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