Carbon contribution of sea ice floes in the Arctic Ocean

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• 作者：Sang H. Lee^a ; ^{sanglee@pusan.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Bo Kyung Kim^a ; Hui-Tae Joo^a ; Jung Woo Park^a ; Jang Han Lee^a ; Hyoung-Min Joo^b ; ¹ ; ^{hmjoo77@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Doo Byoul Lee^b ; Chang-Keun Kang^c ; ² ; ^{ckkang@postech.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Sung-Ho Kang^b
• 关键词：Particulate organic carbon (POC) ; Arctic sea ice floes ; Melt ponds
• 刊名：Deep Sea Research Part II: Topical Studies in Oceanography
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：120
• 期：Complete
• 页码：35-42
• 全文大小：2935 K

文摘

To estimate detailed contributions of particulate organic carbon (POC) as a potential food source in various environments of the Arctic sea ice floes, intensive investigations were executed at two different types of sea ice stations (ST 1 and ST 2) in the northern Chukchi Sea during the summer period in 2011. The average uptake rates of carbon and nitrogen in melt ponds from this study were within the range measured previously. The surface ice of melt ponds at ST 1 had the highest POC concentration with a mean of 148.0 mg C m⁻³ (S.D.=±86.0 mg C m⁻³), followed by sea ice cores at ST 2 (mean±S.D.=125.7±128.2 mg C m⁻³). The POC concentrations in melt ponds ranged between 90.0 mg C m⁻³ (S.D.=±12.7 mg C m⁻³) and 103.9 mg C m⁻³ (S.D.=±47.7 mg C m⁻³) at ST 1 and ST 2, respectively. Major POC contributors to melt ponds were diatoms with a mean biovolume contribution of 48.7% (S.D.=±39.1%) which was strongly related to in situ salinity. Although the total POC concentration of entire sea ice floes ranged from 2.8% to 5.3% of the POC concentration within the euphotic water column at the study locations, the carbon contribution of sea ice floes could be important to higher trophic levels because of the concentrated POC within sea ice floes.