Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-14645-2017 |
Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea | |
Schwier, Allison N.1; 39;Anna, Barbara2 | |
2017-12-08 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Spain |
英文摘要 | While primary marine aerosol (PMA) is an important part of global aerosol total emissions, its chemical composition and physical flux as a function of the biogeo-chemical properties of the seawater still remain highly un-characterized due to the multiplicity of physical, chemical and biological parameters that are involved in the emission process. Here, two nutrient-enriched mesocosms and one control mesocosm, both filled with Mediterranean seawater, were studied over a 3-week period. PMA generated from the mesocosm waters were characterized in term of chemical composition, size distribution and size-segregated cloud condensation nuclei (CCN), as a function of the seawater chlorophyll a (Chl a) concentration, pigment composition, virus and bacteria abundances. The aerosol number size distribution flux was primarily affected by the seawater temperature and did not vary significantly from one mesocosm to the other. The aerosol number size distribution flux was primarily affected by the seawater temperature and did not vary significantly from one mesocosm to the other. Particle number and CCN aerosol fluxes increase by a factor of 2 when the temperature increases from 22 to 32 degrees C, for all particle submicron sizes. This effect, rarely observed in previous studies, could be specific to oligotrophic waters and/or to this temperature range. In all mesocosms (enriched and control mesocosms), we detected an enrichment of calcium (+ 500 %) and a deficit in chloride (36 %) in the submicron PMA mass compared to the literature inorganic composition of the seawater. There are indications that the chloride deficit and calcium enrichment are linked to biological processes, as they are found to be stronger in the enriched mesocosms. This implies a non-linear transfer function between the seawater composition and PMA composition, with complex processes taking place at the interface during the bubble bursting. We found that the artificial phytoplankton bloom did not affect the CCN activation diameter (D-p,D- 50,D- (average) = 59.85 +/- 3.52 nm and D-p,D-50,D- average = 93.42 +/- 5.14 nm for supersaturations of 0.30 and 0.15% respectively) or the organic fraction of the submicron PMA (average organic to total mass = 0.31 +/- 0.07) compared to the control mesocosm. Contrary to previous observations in natural bloom mesocosm experiments, the correlation between the particle organic fraction and the seawater Chl a was poor, indicating that Chl a is likely not a straightforward proxy for predicting, on a daily scale, PMA organic fraction in models for all types of sea and ocean waters. Instead, the organic fraction of the Aitken mode particles were more significantly linked to heterotrophic flagellates, viruses and dissolved organic carbon (DOC). We stress that different conclusions may be obtained in natural (non-enriched) or non-oligotrophic systems. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417516900001 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; ENCAPSULATING WAVE STATE ; SPRAY AEROSOL ; ORGANIC-MATTER ; GLOBAL DISTRIBUTION ; CCN ACTIVATION ; CHLOROPHYLL-A ; PARTICLES ; SALT ; PHYTOPLANKTON |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16151 |
专题 | 地球科学 |
作者单位 | 1.Univ Blaise Pascal, CNRS, Observ Phys Globe Clermont Ferrand, Lab Meteorol Phys,UMR6016, F-63171 Aubiere, France; 2.Univ Montpellier, CNRS, Ctr Ecol Marine Expt MEDIMEER, UMS3282,OSU,OREME,IRD, Sete, France; 3.Univ Perpignan, CNRS, Ctr Format & Rech Environm Mediterraneens, UMR5110, Via Domitia, F-66860 Perpignan, France; 4.Aix Marseille Univ, CNRS, LCE, Marseille, France; 5.Univ Grenoble Alpes, CNRS, IRD, IGE, F-38000 Grenoble, France; 6.Meteo France, CNRM, Toulouse, France; 7.Univ Toulon & Var, Aix Marseille Univ, CNRS, MIO,IRD,UM 110, F-13288 Marseille, France; 8.Univ Claude Bernard Lyon 1, CNRS, Inst Rech Catalyse & Environm Lyon, UMR5256, F-69626 Villeurbanne, France; 9.Geol Survey Spain IGME, Zaragoza 50006, Spain |
推荐引用方式 GB/T 7714 | Schwier, Allison N.,39;Anna, Barbara. Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(23). |
APA | Schwier, Allison N.,&39;Anna, Barbara.(2017).Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(23). |
MLA | Schwier, Allison N.,et al."Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.23(2017). |
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