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Title: 氷河と海氷の融解現象が北極海表層の物質循環過程に与える影響
Other Titles: Effects of glacier and sea ice melting on the biogeochemical cycles of the surface water in the Arctic Ocean
Authors: 野村, 大樹 Browse this author →KAKEN DB
漢那, 直也 Browse this author
大木, 淳之 Browse this author →KAKEN DB
Keywords: Glacier
Sea ice
Fresh water
Arctic Ocean
Issue Date: 25-Dec-2019
Publisher: 日本地球化学会
Journal Title: 地球化学
Volume: 53
Issue: 4
Start Page: 149
End Page: 158
Publisher DOI: 10.14934/chikyukagaku.53.149
Abstract: 北極域では,氷河や海氷などの雪氷の融解が急速に進行している。この融解現象は,淡水や雪氷中に存在する物質を海洋表層に供給するなど,北極域の環境に劇的な変化を招いている。例えば,氷床融解は、陸の鉱物や栄養塩および鉄などを海洋に供給する。この供給過程は,氷河の形態に依存する。さらに,海氷の融解は,海洋表層の化学成分(例えば二酸化炭素)を希釈する。そのため,海洋表層では,二酸化炭素濃度の減少を招き,大気からの二酸化炭素吸収が増加する。本総説では,雪氷の融解現象が北極海表層の物質循環過程に与える影響について,栄養塩,鉄,二酸化炭素,メタンに注目し,これまでの研究や我々の研究グループによる氷上や船舶での現場観測で得た結果を含め紹介するとともに,今後注目すべき北極海表層での物質循環過程について議論する。
In the Arctic region, the glacier and the sea ice are melting rapidly. This melting process leads to the drastic changes of the surface ocean environments by supplying fresh water and biogeochemical components. For example, the glacier melting provides minerals and nutrients from the land to the ocean, and these processes were depending on the type of the glacier between land- and marine terminating glaciers. In addition, sea ice melting dilutes the chemical components (e.g., CO2) in the surface water, leading the decrease of the CO2 concentration with respect to the atmosphere, and increases the absorption of the atmospheric CO2. In this review, we assess the effects of glacier and sea ice melting on the biogeochemical cycles of the surface water (e.g., nutrients, iron, CO2, and CH4) in the Arctic Ocean based on the previous and our studies. We also discuss future biogeochemical cycles in the Arctic Ocean.
Type: article (author version)
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野村 大樹

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