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Reconstructing sea ice extent in the Chukchi Sea over the last 140 years: insights into the application of the PIP25 index

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Title
Reconstructing sea ice extent in the Chukchi Sea over the last 140 years: insights into the application of the PIP25 index
Other Titles
지난 140 년간 척치해의 해빙 범위 복원 : PIP25 적용 가능성 연구
Authors
Kim, Jung-Hyun
Gal, Jong-Ku
Jung, Sang-Yoon
Smik, Lukas
Belt, Simon T.
Park, Kwangkyu
Shin, Kyung-Hoon
Nam, Seung-il
Keywords
Chukchi SeaPIP25Sea ice
Issue Date
2018
Citation
Kim, Jung-Hyun, et al. 2018. Reconstructing sea ice extent in the Chukchi Sea over the last 140 years: insights into the application of the PIP25 index. 9th International Conference on Asian Marine Geology. Shanghai. 2018.10.09~2018.10.12.
Abstract
In this study we investigated suspended particulate matter (SPM) collected along a transect from the East Sea of Korea to the Bering Sea from 18 to 28 July in 2015 and a multicore (ARA01B-3MUC) retrieved from the Chukchi shelf region. We analyzed the samples for the Arctic sea ice proxy IP25 together with a tri-unsaturated highly branched isoprenoid (HBI triene) and two sterols (epi-brassicasterol and dinosterol) to assess the suitability of these compounds for the so-called PIP25 index in the Arctic region as a proxy for sea ice change in the past. Our results highlight that the use of HBI triene, epi-brassicasterol, and dinosterol, as strict phytoplankton markers for the PIP25 index (i.e. PTIP25, PBIP25 and PDIP25, respectively), might result in misleading outcomes. Accordingly, our study highlights that more work is needed to better constrain the use of HBI triene, epi-brassicasterol, and dinosterol, as strict ice-free, open ocean phytoplankton biomarkers when applying the PIP25 index for reconstructing past sea ice changes.
URI
https://repository.kopri.re.kr/handle/201206/12557
Conference Name
9th International Conference on Asian Marine Geology
Conference Place
Shanghai
Conference Date
2018.10.09~2018.10.12
Type
Proceeding
Indexed
Pro(초록)국외
Appears in Collections  
2018-2018, Based Research on International Joint Drilling for Reconstructing Evolution and Glacial History of the Arctic Ocean (18-18) / Nam, Seung-il (PE18350)
2018-2018, Development and Application of the Korea Polar Prediction System (KPOPS) for Climate Change and Disasterous Weather Events (18-18) / Kim, Joo-Hong (PE18130)
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