Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15334 |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years | |
Audrey Limoges; Kaarina Weckströ; m; Sofia Ribeiro; Eleanor Georgiadis; Katrine E. Hansen; Philippe Martinez; Marit‐; Solveig Seidenkrantz; Jacques Giraudeau; Xavier Crosta; Guillaume Massé | |
2020-10-13 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Climate warming is rapidly reshaping the Arctic cryosphere and ocean conditions, with consequences for sea ice and pelagic productivity patterns affecting the entire marine food web. To predict how ongoing changes will impact Arctic marine ecosystems, concerted effort from various disciplines is required. Here, we contribute multi‐decadal reconstructions of changes in diatom production and sea‐ice conditions in relation to Holocene climate and ocean conditions off northwest Greenland. Our multiproxy study includes diatoms, sea‐ice biomarkers (IP25 and HBI III) and geochemical tracers (TOC [total organic carbon], TOC:TN [total nitrogen], δ13C, δ15N) from a sediment core record spanning the last c. 9,000 years. Our results suggest that the balance between the outflow of polar water from the Arctic, and input of Atlantic water from the Irminger Current into the West Greenland Current is a key factor in controlling sea‐ice conditions, and both diatom phenology and production in northeastern Baffin Bay. Our proxy record notably shows that changes in sea‐surface conditions initially forced by Neoglacial cooling were dynamically amplified by the shift in the dominant phase of the Arctic Oscillation (AO) mode that occurred at c. 3,000 yr BP, and caused drastic changes in community composition and a decline in diatom production at the study site. In the future, with projected dominant‐positive AO conditions favored by Arctic warming, increased water column stratification may counteract the positive effect of a longer open‐water growth season and negatively impact diatom production. |
领域 | 气候变化 ; 资源环境 |
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/299215 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Audrey Limoges,Kaarina Weckströ,m,et al. Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years[J]. Global Change Biology,2020. |
APA | Audrey Limoges.,Kaarina Weckströ.,m.,Sofia Ribeiro.,Eleanor Georgiadis.,...&Guillaume Massé.(2020).Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years.Global Change Biology. |
MLA | Audrey Limoges,et al."Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years".Global Change Biology (2020). |
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