The annual cycle and sources of relevant aerosol precursor vapors in the central Arctic during the MOSAiC expedition

被引：1

作者：

Boyer, Matthew ^{[1
]}

Aliaga, Diego ^{[1
]}

Quelever, Lauriane L. J. ^{[1
]}

Bucci, Silvia ^{[2
]}

Angot, Helene ^{[3
,4
]}

Dada, Lubna ^{[3
,5
]}

Heutte, Benjamin ^{[3
]}

Beck, Lisa ^{[6
]}

Duetsch, Marina ^{[2
]}

Stohl, Andreas ^{[2
]}

Beck, Ivo ^{[3
]}

Laurila, Tiia ^{[1
]}

Sarnela, Nina ^{[1
]}

Thakur, Roseline C. ^{[1
]}

Miljevic, Branka ^{[7
]}

Kulmala, Markku ^{[1
]}

Petaja, Tuukka ^{[1
]}

Sipila, Mikko ^{[1
]}

Schmale, Julia ^{[3
]}

Jokinen, Tuija ^{[1
,8
]}

机构：

[1] Univ Helsinki, Inst Atmospher & Earth Syst Res INAR Phys, Fac Sci, POB 64, Helsinki 00014, Finland

[2] Univ Vienna, Dept Meteorol & Geophys, Vienna, Austria

[3] Ecole Polytech Fed Lausanne EPFL, Extreme Environm Res Lab, CH-1951 Sion, Switzerland

[4] Univ Grenoble Alpes, CNRS, INRAE, IRD,Grenoble INP,IGE, Grenoble, France

[5] Paul Scherrer Inst, Lab Atmospher Chem, CH-5232 Villigen, Switzerland

[6] Goethe Univ Frankfurt, Inst Atmospher & Environm Sci, D-60438 Frankfurt, Germany

[7] Queensland Univ Technol, Sch Earth & Atmospher Sci, Brisbane, Australia

[8] Cyprus Inst, Climate & Atmosphere Res Ctr CARE C, POB 27456, CY-1645 Nicosia, Cyprus

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2024年 / 24卷 / 22期

基金：

欧洲研究理事会; 芬兰科学院;

关键词：

PARTICLE DISPERSION MODEL; DIMETHYL SULFIDE; SULFURIC-ACID; SIZE DISTRIBUTIONS; BOUNDARY-LAYER; SEA-SALT; MASS-SPECTROMETER; FORMATION EVENTS; AIR-POLLUTION; IODINE;

D O I：

10.5194/acp-24-12595-2024

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, we present and analyze the first continuous time series of relevant aerosol precursor vapors from the central Arctic (north of 80 degrees N) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. These precursor vapors include sulfuric acid (SA), methanesulfonic acid (MSA), and iodic acid (IA). We use FLEXPART simulations, inverse modeling, sulfur dioxide (SO2) mixing ratios, and chlorophyll a (chl a) observations to interpret the seasonal variability in the vapor concentrations and identify dominant sources. Our results show that both natural and anthropogenic sources are relevant for the concentrations of SA in the Arctic, but anthropogenic sources associated with Arctic haze are the most prevalent. MSA concentrations are an order of magnitude higher during polar day than during polar night due to seasonal changes in biological activity. Peak MSA concentrations were observed in May, which corresponds with the timing of the annual peak in chl a concentrations north of 75 degrees N. IA concentrations exhibit two distinct peaks during the year, namely a dominant peak in spring and a secondary peak in autumn, suggesting that seasonal IA concentrations depend on both solar radiation and sea ice conditions. In general, the seasonal cycles of SA, MSA, and IA in the central Arctic Ocean are related to sea ice conditions, and we expect that changes in the Arctic environment will affect the concentrations of these vapors in the future. The magnitude of these changes and the subsequent influence on aerosol processes remains uncertain, highlighting the need for continued observations of these precursor vapors in the Arctic.

引用

页码：12595 / 12621

页数：27