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Spatial and temporal variations in high turbidity surface water off the Thule region, northwestern Greenland
https://nipr.repo.nii.ac.jp/records/13553
https://nipr.repo.nii.ac.jp/records/135530a3adb92-f438-45a6-8c50-4617819a8cff
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2016-10-07 | |||||
タイトル | ||||||
タイトル | Spatial and temporal variations in high turbidity surface water off the Thule region, northwestern Greenland | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Spatial and temporal variations in high turbidity surface water off the Thule region, northwestern Greenland | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | High turbidity water | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Glacial melt | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Open fjord | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Greenland | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Ice-ocean interaction | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Ohashi, Yoshihiko
× Ohashi, Yoshihiko× Iida, Takahiro× Sugiyama, Shin× Aoki, Shigeru |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Glacial meltwater discharge from the Greenland ice sheet and ice caps forms high turbidity water in the proglacial ocean off the Greenland coast. Although the timing and magnitude of high turbidity water export affect the coastal marine environment, for example, through impacts on biological productivity, little is known about the characteristics of this high turbidity water. In this paper, we therefore report on the spatial and temporal variations in high turbidity water off the Thule region in northwestern Greenland, based on remote sensing reflectance data at a wavelength of 555 nm (Rrs555). The high turbidity area, identified on the basis of high reflectivity (Rrs555 ≥ 0.0070 sr−1), was generally distributed near the coast, where many outlet glaciers terminate in the ocean and on land. The extent of the high turbidity area exhibited substantial seasonal and interannual variability, and its annual maximum extent was significantly correlated with summer air temperature. Assuming a linear relationship between the high turbidity area and summer temperature, annual maximum extent increases under the influence of increasing glacial meltwater discharge, as can be inferred from present and predicted future warming trends. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | グリーンランド氷床や周縁氷帽から海洋に流出する融解水によって氷床沿岸には高濁度海水域が形成され、海洋の生物生産等に影響を与えている。しかしながら、氷河融解の影響を反映した高濁度水の変動特性は明らかとなっていない。そこでグリーンランド氷床北西部Thule地域沿岸における高濁度海水域面積の時空間変動を波長555 nmのリモートセンシング反射率を用いて解析した。解析の結果、高濁度海水域は氷床や氷帽から溢流する氷河前縁部に形成されることが確認された。その面積は顕著な季節変動および経年変動を示し、この時間変動は気温変化と有意な相関を示した。さらに、本研究で得られた夏期平均気温と高濁度海水域の最大面積の正の相関関係から、近年の気温上昇傾向に伴う融解水の流入増加によって、高濁度海水域の面積が増加しつつあることが予想された。 | |||||
書誌情報 |
en : Polar Science 巻 10, 号 3, p. 270-277, 発行日 2016-09 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://dx.doi.org/10.1016/j.polar.2016.07.003 | |||||
関連名称 | 10.1016/j.polar.2016.07.003 |