Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | P2BEP2_188180 |
| Spatial variability of vegetation-, biomass burning-, and fossil fuel pollution dynamics in the Arctic along a South-North transect from palynological ice records in Central Greenland over the past millennium | |
| Brügger Sandra Olivia | |
| 主持机构 | Institution abroad - IACH |
| 开始日期 | 2019 |
| 结束日期 | 2021 |
| 项目类别 | Careers;Fellowships |
| 资助机构 | CH-SNSF（瑞士国家科学基金会） |
| 语种 | 英语 |
| 国家 | 瑞士 |
| 中文简介 | Hydrology, Limnology, Glaciology |
| 英文简介 | The Arctic is an important geographic region with an accelerated temperature rise compared to global warming, called “Arctic amplification”, which drives important climate-ecosystem feedback mechanisms that will have both regional and global effects (e.g. global sea-level rise and modification of the ocean currents). Microfossil impurities (i.e. charcoal, spheroidal carbonaceous particles (SCP)) in pure surface snow directly change the surface albedo. The recent development of a novel extraction method that allows microfossil retrieval from ice archives with extremely low concentrations (Brugger et al., 2018a) allows for the first time application of ice palynology in very remote archives such as Central Greenland ice. The method was tested in a pre-study for the proposed project (Brugger et al., in press).This project will provide important novel records of past vegetation, biomass burning, and fossil fuel pollution on the Greenland ice sheet that will contribute to identification of triggers, processes, and mechanisms of environmental changes under global change conditions and help to disclose feedback-mechanisms under current rapid climate warming in the Arctic. The unique setting with ice core sites along a South to North transect in Greenland will allow us to investigate for the first time in-depth the long-range transport of microfossils under complete absence of local sources. I will quantitatively assess microscopic-size impurities on the Greenland ice sheet in space and over time through optical analyses of pollen, spores, microscopic charcoal, and SCP, that influence snow surface albedo and thereby accelerate ice melting. The project will provide fundamental knowledge to advance the interpretation of remote records with large catchments in different geographical regions as e.g. palynological records from high-alpine records in the mid-latitudes, the tropics or potential future studies in Antarctica.The overall goal of this project is to provide high-resolution vegetation, biomass burning, and fossil fuel pollution records from Greenland ice cores along a South to North transect based on consistent palynological analyses with well-constrained chronologies and available complementary chemical biomass burning-, fossil fuel burning, and climate-proxies already measured by the project partners at the host institution. The project is divided into two objectives: Objective 1: To provide a novel continuous and high-resolution reconstruction of vegetation (pollen and spores), biomass burning (microscopic charcoal), and fossil fuel pollution (SCP) from Southern Greenland (ACT11d) ice core in relative proximity to the Old Norse settlements (AD 985-1500). Objective 2: To extend the retrieved paleoecological information from objective 1 in space with original vegetation-, biomass burning-, and fossil fuel pollution records based on identical methods applied to ice cores in Central (Summit), Western (NASA-U), and Northern Greenland (TUNU).The proposed project will be executed at the Desert Research Institute in Reno, Nevada, which has state-of-the-art lab facilities for ice core analysis and paleoecology. It will be co-supervised by Prof. Dr. Joe McConnell, a world-renowned expert in ice core research and paleoclimatology, and Prof. Dr. Dave Rhode, a renowned researcher in the field of paleoecology and Holocene climate. Combined, the supervisors have extensive and complementary research experience for the planned paleoecological ice analyses. The ice cores for objective 1 and 2 were previously measured for the chemical species, have reliable chronologies, and sufficient ice material is available for my planned optical microfossil analyses at the host institution. With this project, I will gain novel and unique ice core analytical skills for my future research career. |
| 英文关键词 | Fire history Ice core Paleoecology Fossil fuel pollution Greenland Vegetation dynamics Pollen Palynology |
| 来源学科分类 | Hydrology, Limnology, Glaciology |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/356005 |
| 推荐引用方式 GB/T 7714 | Brügger Sandra Olivia.Spatial variability of vegetation-, biomass burning-, and fossil fuel pollution dynamics in the Arctic along a South-North transect from palynological ice records in Central Greenland over the past millennium.2019. |
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