Fate of dissolved black carbon in the deep Pacific Ocean

Yamashita, Youhei; Nakane, Motohiro; Mori, Yutaro; Nishioka, Jun; Ogawa, Hiroshi

Fate of dissolved black carbon in the deep Pacific Ocean

Yamashita, Youhei; Nakane, Motohiro; Mori, Yutaro et al.

Nature Communications, 2022, 13, 307

Permalink : https://hdl.handle.net/2115/84152

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/84152
タイトル	Fate of dissolved black carbon in the deep Pacific Ocean
著者	Yamashita, Youhei ; Nakane, Motohiro ; Mori, Yutaro ; Nishioka, Jun ; Ogawa, Hiroshi
e-Rad_Researcher 50432224 著者名 Yamashita, Youhei
著者名 Nakane, Motohiro
著者名 Mori, Yutaro
e-Rad_Researcher 90371533 著者名 Nishioka, Jun
e-Rad_Researcher 50260518 著者名 Ogawa, Hiroshi
言語	英語
発行日	2022-01-13
出版者	Nature Portfolio
収録物名	Nature Communications
巻(号)	13
ページ	307
抄録	Black carbon (BC), a byproduct of biomass and fossil fuel combustion, may impact the climate because it can be stored on Earth's surface for centuries to millennia. Dissolved BC (DBC) occurs ubiquitously in the ocean. However, the DBC cycle in the ocean has not been well constrained. Here, we show the basin-scale distribution of DBC in the Pacific Ocean and find that the DBC concentrations in the deep Pacific Ocean decrease along with deep-ocean meridional circulation. The DBC concentration is negatively correlated with apparent oxygen utilization, a proxy of the integrated flux of sinking particles, in the deep Pacific Ocean, implying that DBC is removed from the deep ocean to abyssal sediments through sorption onto sinking particles. The burial flux of BC to abyssal sediments is estimated to be 0.040-0.085 PgC yr(-1), corresponding to 1.5-3.3% of the anthropogenic CO2 uptake by the ocean.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2041-1723
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1038/s41467-022-27954-0