Internal Wave Imprints on Temperature Fluctuations as Revealed by Rapid‐Sampling Deep Profiling Floats

Gao, Zhiyuan; Chen, Zhaohui; Huang, Xiaodong; Xu, Zhenhua; Yang, Haiyuan; Zhao, Zhenze; Ren, Chong; Wu, Lixin

doi:10.1029/2021jc017878

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…As proof of concept, regional pilot arrays of deep floats have been deployed in the Southern Ocean (Foppert et al., 2021; Thomas et al., 2020), Southeast Indian Ocean (Johnson et al., 2022; Tamsitt et al., 2019), Pacific Ocean (Gao et al., 2021; Johnson et al., 2019; Zilberman et al., 2020), and Atlantic Ocean (Desbruyéres et al., 2022; Johnson, 2022; Johnson & King, 2023). They are giving an unprecedented view of the abyss.…”

Section: Introductionmentioning

confidence: 99%

Deep Argo Observations of Antarctic Bottom Water in the Deep Fracture Zones of the Southwest Indian Ridge

Menezes,

Robbins,

Furey

et al. 2024

JGR Oceans

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The Madagascar Basin is the primary pathway for Antarctic Bottom Water to ventilate the entire western Indian Ocean as part of the Global Overturning Circulation. The only way for this water mass to reach this basin is by crossing the Southwest Indian Ridge through its deep fracture zones. However, due to the scarcity of observations, the Antarctic Bottom Water presence has only been well‐established in the Atlantis II fracture zone. In May 2023, the Deep Madagascar Basin Experiment deployed three Deep SOLO Argo floats in the exit of the fracture zones that were more likely to transport Antarctic Bottom Water: Atlantis II, Novara, and Melville. These floats have been collecting temperature and salinity profiles every 3–5 days with high vertical resolution in the deep ocean. In the present paper, we use the first 7 months of float data to characterize the Antarctic Bottom Water in the deep fracture zone area, revisiting a half‐century puzzle about the Melville contribution. We also collected shipboard‐based profiles to calibrate float salinity and show it is within the Deep Argo program target accuracy. We find Antarctic Bottom Water in both Melville and Novara fracture zones, not only in Atlantis II. This is the first time the Novara contribution has been revealed. The floats also uncover their distinct properties, which may result from the different mixing histories.

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