Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab4b6e |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index | |
Kim, Jung-Hyun1; Gal, Jong-Ku1,2; Jun, Sang-Yoon1; Smik, Lukas3; Kim, Dahae1; Belt, Simon T.3; Park, Kwangkyu1; Shin, Kyung-Hoon2; Nam, Seung-Il1 | |
2019-12-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; England |
英文摘要 | In this study, we aimed to reconstruct spring (April?June) sea ice changes in the western Arctic Ocean over recent centuries (ca. the last 250 years) by measuring biomarker distributions in a multicore (ARA01B-03MUC) retrieved from the Chukchi Shelf region and to evaluate outcomes against known or modelled estimates of sea ice conditions. Specifically, we analyzed for the Arctic sea ice proxy IP25 and assessed the suitability of a further highly branched isoprenoid (HBI) lipid (HBI III), epi-brassicasterol, and dinosterol as complementary biomarkers for use with the so-called phytoplankton marker-IP25 index (PIP25; PIIIIP25, PBIP25, and PDIP25, respectively). The presence of IP25 throughout core ARA01B-03MUC confirms the occurrence of seasonal sea ice at the study site over recent centuries. From a semi-quantitative perspective, all three PIP25 indices gave different trends, with some dependence on the balance factor c, a term used in the calculation of the PIP25 index. PIIIIP25-derived spring sea ice concentration (SpSIC) estimates using a c value of 0.63, determined previously from analysis of Barents Sea surface sediments, were likely most reliable, since SpSIC values were high throughout the record (SpSIC >78%), consistent with the modern context for the Chukchi Sea and the mean SpSIC record of the 41 CMIP5 climate models over recent centuries. PBIP25-based SpSIC estimates were also high (SpSIC 108%?127%), albeit somewhat over-estimated, when using a c value of 0.023 obtained from a pan-Arctic distribution of surface sediments. In contrast, PDIP25 values using a pan-Arctic c value of 0.11, and PIP25 data based on the mean biomarker concentrations from ARA01B-03MUC, largely underestimated sea ice conditions (SpSIC as low as 13%), and exhibited poor agreement with instrumental records or model outputs. On the other hand, PBIP25 values using a c factor based on mean IP25 and epi-brassicasterol concentrations exhibited a decline towards the core top, which resembled recent decreasing changes in summer sea ice conditions for the Chukchi Sea; however, further work is needed to test the broader spatial generality of this observation. |
英文关键词 | sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Chukchi Sea |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000499326800001 |
WOS关键词 | BIOMARKER ; IDENTIFICATION ; VARIABILITY ; PB-210 |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/224726 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Korea Polar Res Inst, 26 Songdomirae Ro, Incheon 21990, South Korea; 2.Hanyang Univ, Dept Marine Sci & Convergence Technol, ERICA Campus,55 Hanyangdaehak Ro, Ansan 426791, Gyeonggi Do, South Korea; 3.Univ Plymouth, Sch Geog Earth & Environm Sci, Plymouth PL4 8AA, Devon, England |
推荐引用方式 GB/T 7714 | Kim, Jung-Hyun,Gal, Jong-Ku,Jun, Sang-Yoon,et al. Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(12). |
APA | Kim, Jung-Hyun.,Gal, Jong-Ku.,Jun, Sang-Yoon.,Smik, Lukas.,Kim, Dahae.,...&Nam, Seung-Il.(2019).Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index.ENVIRONMENTAL RESEARCH LETTERS,14(12). |
MLA | Kim, Jung-Hyun,et al."Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index".ENVIRONMENTAL RESEARCH LETTERS 14.12(2019). |
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