Climate Change Data Portal
| VULNERABILITY OF INLAND WATERS AND THE AQUATIC CARBON CYCLE TO CHANGING PERMAFROST AND CLIMATE ACROSS BOREAL NORTHWESTERN NORTH AMERICA | |
| 项目编号 | NNX15AU14A |
| MARK JORGENSON | |
| 项目主持机构 | ALASKA ECOSCIENCE |
| 开始日期 | 2015-10-01 |
| 结束日期 | 2018-09-30 |
| 英文摘要 | Bacteria are present in the atmosphere from the boundary layer to the high troposphere. Their contribution to microphysical processes such as droplet formation and ice nucleation, and to the chemical reactivity in clouds raised the interest of the atmospheric sciences community over the last 20 years. Numerous observations and measurements now support the idea of bacteria in the atmosphere. However, many processes remain un-deciphered to the extent of their contribution, especially concerning element biogeochemical cycles, as well as on their composition, function and dynamics. In particular, there is still a paucity of data on the interactions between microbes and major compounds (S, N, C) that are both nutrient/metabolic products and compounds with critical implications concerning climate, air pollution and overall atmospheric chemistry. There are also currently no large scale atmospheric investigations of microbial interactions with global contaminants such as mercury (Hg), although microbes play a fundamental role in the biogeochemical cycle of Hg in terrestrial and aquatic ecosystems. Hg is still a threat to ecosystems and human health and is efficiently transported in the atmosphere where it can be converted into labile forms that are deposited on superficial surfaces of the planet. INHALE proposes a novel multidisciplinary approach combining expertise in microbiology, biomolecular microbiology, atmospheric chemistry and physics to characterize atmospheric microbial life on a global scale and how it relates to biogeochemical cycling. Specifically, we will demonstrate how the physics and chemistry of the lower atmosphere contribute to temporal and spatial variations in microbial community structures. We also propose to demonstrate the role of the atmosphere as an environment supporting key ecosystem services provided by microbes, as they relate to contaminant cycling and Human health. For this purpose we propose to target the global contaminant mercury as a model for understanding the very first steps of microbial and abiotic interactions in the atmosphere. We will then reveal the geographical and environmental patterns of Hg genetic markers, and identify the role played by the atmospheric microbiota on changing Hg speciation and thereby its toxicity and ability to enter remote ecosystems. This proposal offers unique large scale investigations that are permitted by our connection with monitoring networks. Ten sites will be investigated worldwide from the Arctic to Antarctica, using high altitude stations when possible. One of these sites, the Puy de Dôme in France, will be investigated more deeply over one year. It will support the collection of long time series of air and clouds samples that will also serve for laboratory experiments. The use of new technologies (“omics”) combined with comprehensive atmospheric chemistry and physics will crack open the black box of microbial aerobiology and provide unprecedented insight into community structure and functional diversity at the global level. Overall, this research will transform our perception of the atmospheric component of the biosphere and help to understand the future of atmospheric life and its impact on biogeochemical cycles in a warming environment. |
| 学科分类 | 11 - 工程与技术;1107 - 航空航天工程;03 - 天文学 |
| 资助机构 | US-NASA |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/74021 |
| 推荐引用方式 GB/T 7714 | MARK JORGENSON.VULNERABILITY OF INLAND WATERS AND THE AQUATIC CARBON CYCLE TO CHANGING PERMAFROST AND CLIMATE ACROSS BOREAL NORTHWESTERN NORTH AMERICA.2015. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [MARK JORGENSON]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [MARK JORGENSON]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [MARK JORGENSON]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
