Spatial Distribution of Methanesulphonic Acid in the Arctic Aerosol Collected during the Chinese Arctic Research Expedition
Spatial Distribution of Methanesulphonic Acid in the Arctic Aerosol Collected during the Chinese Arctic Research Expedition
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DOI：
10.3390/atmos6050699
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发表时间：
2015-05
期刊：
影响因子：
2.9
通讯作者：
Peipei Ye;Z. Xie;Juan Yu;Hui Kang
中科院分区：
文献类型：
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作者：
Peipei Ye;Z. Xie;Juan Yu;Hui Kang
甲烷磺酸（MSA）主要来源于海洋生物源排放，常被用来估算海洋生物源的贡献。然而，有关北冰洋，特别是北冰洋中部海域的MSA的报道很少。在这里，我们分析了MSA在海洋和海洋中收集的气溶胶样品在中国北极科学考察（北极2012年）使用离子色谱法。北冰洋上空的气溶胶MSA浓度变化很大，范围从不可检测（ND）到229纳克/立方米，平均值为27 ± 54纳克/立方米（中位数：10纳克/立方米）。结果表明，气溶胶MSA的分布具有明显的区域差异，这种差异受生物和非生物因素的影响。在挪威海普遍观察到高值;这一现象是由于该区域浮游植物初级生产力和二甲基硫通量的高比率。北冰洋中部浮冰区的浓度一般低于楚科奇海冰缘开放沃茨。这种差异主要是由海冰造成的。此外，我们发现，较高的MSA浓度与温暖的海表温度（SST）。
Methanesulphonic acid (MSA, mainly derived from marine biogenic emissions) has been frequently used to estimate the marine biogenic contribution. However, there are few reports on MSA over the Arctic Ocean, especially the central Arctic Ocean. Here, we analyzed MSA in aerosol samples collected over the ocean and seas during the Chinese Arctic Research Expedition (CHINARE 2012) using ion chromatography. The aerosol MSA concentrations over the Arctic Ocean varied considerably and ranged from non-detectable (ND) to 229 ng/m3, with an average of 27 ± 54 ng/m3 (median: 10 ng/m3). We found the distribution of aerosol MSA exhibited an obvious regional variation, which was affected by biotic and abiotic factors. High values were generally observed in the Norwegian Sea; this phenomenon was attributed to high rates of phytoplankton primary productivity and dimethylsulfide (DMS) fluxes in this region. Concentrations over the pack ice region in the central Arctic Ocean were generally lower than over the open waters at the ice edge in the Chukchi Sea. This difference was the mainly caused by sea ice. In addition, we found that higher MSA concentrations were associated with warmer sea surface temperature (SST).