Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin
Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin
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DOI：
10.1029/2022gl100610
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发表时间：
2023-03
影响因子：
5.2
通讯作者：
Jianing Wang;Fan Wang;Youyu Lu;Hang Zhang;Qiang Ma;L. Pratt;Zhixiang Zhang
中科院分区：
文献类型：
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作者：
Jianing Wang;Fan Wang;Youyu Lu;Hang Zhang;Qiang Ma;L. Pratt;Zhixiang Zhang
太平洋经向翻转环流（L-PMOC）的低层深层分支通过输送低层绕极水（LCPW），是海洋气候和地球化学系统的重要组成部分。通过2019-2021年的六系泊阵列测量，首次揭示了L-PMOC从雅普-马里亚纳交汇处（YMJ）到北方菲律宾盆地（NPB）的路径和体积运输。L-PMOC季节性地在YMJ侵入西太平洋。然后，它通过YMJ-北方海峡以1.41 ± 1.43/0.26（平均值±标准差/总均方根误差）Sv进入西马里亚纳盆地（WMB），并通过九州-帕劳海岭（KPR）海峡以0.75 ± 0.53/0.18 Sv进一步进入NPB。两者之差为0.65 ± 1.35/0.28 Sv，为2.5年内LCPW进入WMB的净横向通量。对数据同化海洋模式解的分析表明，通过深槽的L-PMOC输送与主要由上层海洋过程强迫的深压梯度一致。
The lower deep branch of the Pacific Meridional Overturning Circulation (L‐PMOC) is a crucial element of the ocean's climate and biogeochemical systems through carrying the Lower Circumpolar Water (LCPW). For the first time, the pathway and volume transport of L‐PMOC from the Yap‐Mariana Junction (YMJ) to the Northern Philippine Basin (NPB) are revealed by a six‐mooring array measurement over 2019–2021. The L‐PMOC seasonally intrudes into the western Pacific at the YMJ. Then, it is directed into the West Mariana Basin (WMB) through YMJ‐Northern Channel with 1.41 ± 1.43/0.26 (mean ± standard deviation/total rms error) Sv, and further into the NPB through Kyushu‐Palau Ridge (KPR) Channel with 0.75 ± 0.53/0.18 Sv. Their difference 0.65 ± 1.35/0.28 Sv is the net lateral flux of LCPW into the WMB over the 2.5 yr. Analyses of a data‐assimilative ocean model solution suggest that the L‐PMOC transports through the deep channels are consistent with deep pressure gradients forced mainly by upper ocean processes.