当前位置: X-MOL 学术ACS Earth Space Chem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Aerosol Marine Primary Carbohydrates and Atmospheric Transformation in the Western Antarctic Peninsula
ACS Earth and Space Chemistry ( IF 3.4 ) Pub Date : 2021-04-14 , DOI: 10.1021/acsearthspacechem.0c00351
Sebastian Zeppenfeld 1 , Manuela van Pinxteren 1 , Dominik van Pinxteren 1 , Heike Wex 2 , Elisa Berdalet 3 , Dolors Vaqué 3 , Manuel Dall’Osto 3 , Hartmut Herrmann 1
Affiliation  

We present ship-borne and land-based measurements of carbohydrate concentrations and patterns in (i) bulk seawater, (ii) sea surface microlayer (SML), and (iii) atmospheric size-resolved aerosol particles (0.05–10 μm) collected in the Western Antarctic Peninsula. In seawater, we find higher combined carbohydrates (CCHO) in both the particulate (PCCHO, 13–248 μg L–1) and dissolved (DCCHO, 14–294 μg L–1) phases than dissolved free carbohydrates (DFCHO, 1.0–17 μg L–1). Moderate enrichment factors are found in the SML samples (median EFSML = 1.4 for PCCHO, DCCHO, and DFCHO). In PM10 atmospheric particles, combined carbohydrates (CCHOaer,PM10 0.2–11.3 ng m–3) were preferably found in particles of two size modes (0.05–0.42 and 1.2–10 μm) and strongly correlated with Na+aer,PM10 and wind speed, hence suggesting oceanic emission as their primary source. In contrast to SML samples, very high enrichment factors for CCHOaer relative to the bulk water (EFaer) were estimated for supermicron (20–4000) and submicron (40–167 000) particles. Notably, the relative atmospheric aerosol monosaccharide compositions strongly differed from the ones sampled in seawater. The prevalence of bacterial monosaccharides (muramic acid, glucosamine) in aerosol particles allows us to suggest a selective consumption and release of polysaccharides by bacteria in the atmosphere. Our results highlight the need to evaluate the role of different ecosystems as aerosol sources around Antarctica.

中文翻译:

南极半岛西部的海洋气溶胶和大气转化

我们介绍了船载和陆基测量中(i)散装海水,(ii)海面微层(SML)和(iii)从大气中分离出的大气尺寸分辨气溶胶颗粒(0.05–10μm)的碳水化合物浓度和模式。西部南极半岛。在海水中,我们发现颗粒相(PCCHO,13–248μgL –1)和溶解相(DCCHO,14–294μgL –1)中的总碳水化合物比溶解的游离碳水化合物(DFCHO,1.0–17)更高微克L –1)。在SML样本中发现了中等富集因子(对于PCCHO,DCCHO和DFCHO,中值EF SML = 1.4)。在PM 10大气颗粒中,合并的碳水化合物(CCHO aer,PM10 0.2–11.3 ng m –3)最好在两种尺寸模式(0.05-0.42和1.2-10μm)的颗粒中发现,并且与Na + aer,PM10和风速密切相关,因此建议将海洋排放作为其主要来源。与SML样品相比,CCHO aer的富集因子相对于散装水(EF aer)被估计为超微米(20–4000)和亚微米(40–16.7万)颗粒。值得注意的是,相对的大气气溶胶单糖组成与海水中的采样有很大不同。气溶胶颗粒中细菌性单糖(山mic酸,氨基葡萄糖)的普遍存在使我们提出了细菌在大气中选择性消耗和释放多糖的建议。我们的结果强调需要评估不同生态系统作为南极洲周围气溶胶来源的作用。
更新日期:2021-05-20
down
wechat
bug