Objective estimates of mantle ³He in the ocean and implications for constraining the deep ocean circulation

详细信息    查看全文

• 作者：Mark Holzer^a ; ¹ ; ^{mholzer@unsw.edu.au} ; Timothy DeVries^b ; Daniele Bianchi^c ; Robert Newton^d ; Peter Schlosser^d ; ² ; Gisela Winckler^d
• 关键词：mantle helium-3 ; ocean circulation ; inverse modelling
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：458
• 期：Complete
• 页码：305-314
• 全文大小：1407 K
• 卷排序：458

文摘

The ocean's mantle 3He source is estimated using data-assimilated circulations. Radiocarbon and CFC constrained circulations allow δ3δ3He fits with mere ∼15% relative error. The jet-sheared structure of δ3He in the deep tropical Pacific is captured by the circulations used. Southern Ocean ventilation and eddy diffusion are critically important in the inference of the mantle helium sources. Biases in modeled δ3He suggest the need to data-assimilate δ3He into the circulation.