Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2000134117 |
Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer | |
Uetake, Jun1; Hill, Thomas C. J.1; Moore, Kathryn A.1; DeMott, Paul J.1; Protat, Alain2; Kreidenweis, Sonia M.2 | |
2020-06-01 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:24页码:13275-13282 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Australia |
英文摘要 | Microorganisms are ubiquitous and highly diverse in the atmosphere. Despite the potential impacts of airborne bacteria found in the lower atmosphere over the Southern Ocean (SO) on the ecology of Antarctica and on marine cloud phase, no previous region-wide assessment of bioaerosols over the SO has been reported. We conducted bacterial profiling of boundary layer shipboard aerosol samples obtained during an Austral summer research voyage, spanning 42.8 to 66.5 degrees S. Contrary to findings over global subtropical regions and the Northern Hemisphere, where transport of microorganisms from continents often controls airborne communities, the great majority of the bacteria detected in our samples were marine, based on taxonomy, back trajectories, and source tracking analysis. Further, the beta diversity of airborne bacterial communities varied with latitude and temperature, but not with other meteorological variables. Limited meridional airborne transport restricts southward community dispersal, isolating Antarctica and inhibiting microorganism and nutrient deposition from lower latitudes to these same regions. A consequence and implication for this region's marine boundary layer and the clouds that overtop it is that it is truly pristine, free from continental and anthropogenic influences, with the ocean as the dominant source controlling low-level concentrations of cloud condensation nuclei and ice nucleating particles. |
英文关键词 | bioaerosol marine aerosol Southern Ocean |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000546040300023 |
WOS关键词 | BIOGENIC ICE NUCLEI ; ATMOSPHERE ; DUST ; ENVIRONMENTS ; COMMUNITIES ; TRANSPORT ; REMOTE ; LAKE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/273382 |
专题 | 地球科学 |
作者单位 | 1.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 2.Australian Bur Meteorol, Res & Dev, Melbourne, Vic 3008, Australia |
推荐引用方式 GB/T 7714 | Uetake, Jun,Hill, Thomas C. J.,Moore, Kathryn A.,et al. Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(24):13275-13282. |
APA | Uetake, Jun,Hill, Thomas C. J.,Moore, Kathryn A.,DeMott, Paul J.,Protat, Alain,&Kreidenweis, Sonia M..(2020).Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(24),13275-13282. |
MLA | Uetake, Jun,et al."Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.24(2020):13275-13282. |
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