Meltwater Discharge From Marine-Terminating Glaciers Drives Biogeochemical Conditions in a Greenlandic Fjord

Kanna, Naoya; Sugiyama, Shin; Ando, Takuto et al.

Global Biogeochemical Cycles, 2022, 36(11), e2022GB007411

Permalink : https://hdl.handle.net/2115/89113

このアイテムのアクセス数:308件（2026-08-14 07:19 集計）

閲覧可能ファイル 

ファイル フォーマット サイズ 閲覧回数 説明
Glob. Biogeochem. Cycle_36(11)2022 pdf 2.92 MB 395
Supporting information si-s01 pdf 2.61 MB 180

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

アクセス権
open access
URI
https://hdl.handle.net/2115/89113
タイトル
Meltwater Discharge From Marine-Terminating Glaciers Drives Biogeochemical Conditions in a Greenlandic Fjord
著者
Kanna, Naoya ; Sugiyama, Shin ; Ando, Takuto ; Wang, Yefan ; Sakuragi, Yuta ; Hazumi, Toya ; Matsuno, Kohei ; Yamaguchi, Atsushi ; Nishioka, Jun ; Yamashita, Youhei
e-Rad_Researcher
90849720
著者名
Kanna, Naoya
著者名
Sugiyama, Shin
著者名
Ando, Takuto
著者名
Wang, Yefan
著者名
Sakuragi, Yuta
著者名
Hazumi, Toya
e-Rad_Researcher
90712159
著者名
Matsuno, Kohei
e-Rad_Researcher
50344495
著者名
Yamaguchi, Atsushi
e-Rad_Researcher
90371533
著者名
Nishioka, Jun
e-Rad_Researcher
50432224
著者名
Yamashita, Youhei
言語
英語
キーワード
trace metals
nutrients
dissolved organic matter
protists
glacier
Greenland
発行日
2022-11
出版者
American Geophysical Union
収録物名
Global Biogeochemical Cycles
巻(号)
36(11)
ページ
e2022GB007411
抄録
An increasing body of work has shown the potential impacts of subglacial discharge from marine-terminating glaciers on the marine environment around Greenland. Upwelling of nutrients associated with rising buoyant plumes near the front of marine-terminating glaciers plays a key role in maintaining the high productivity of connected fjords. The response of protist communities to subglacial discharges into fjords nevertheless remains poorly understood. Here we show data of water properties, nutrients, and protist communities during two summers in 2018 and 2019 in a Greenlandic fjord system fed by marine-terminating glaciers. This study included the period of intense summer melting of the Greenland Ice Sheet in 2019. The data revealed high nutrient concentrations in 2019 that were attributed to intensified upwelling of nutrients and dissolved iron into the subsurface layer. The source of the iron and the nutrients was subglacial discharge and deep fjord water, respectively. Intense glacial discharges in 2019 mitigated nitrate and phosphate limitations of phytoplankton in the fjord and resulted in an increase of chlorophyll a in the subsurface layer and growth of large diatoms. Heterotrophic protists such as dinoflagellates, tintinnids, and nanoflagellates were more abundant in the summer of 2019. We concluded that nutrient upwelling by subglacial discharges was the major driver of the structure of lower trophic levels in fjord ecosystems. We hypothesize that the more intense melting of glaciers and related increase in subglacial discharge will enhance nutrient upwelling, and increased summer productivity in fjords until the glaciers retreat and terminate on land.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Copyright 2022 American Geophysical Union.
PISSN
0886-6236
EISSN
1944-9224
NCID
AA10764878
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1029/2022GB007411