Water‐Mass Properties and Circulation in the Deep and Abyssal Philippine Sea

Tian, Zichen; Zhou, Chun; Xiao, Xin; Wang, Tinghao; Qu, Tangdong; Yang, Qingxuan; Zhao, Wei; Tian, Jiwei

doi:10.1029/2020jc016994

Cited by 12 publications

(14 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nearly zero transport through the channel at 134.9°E/12°N is also consistent with the observed fact that the LCPW cannot penetrate the Southern Philippine Basin (Tian et al., 2021). Consistent with geostrophic velocity inferred from hydrographic measurement at 137°E (Tian et al., 2021, their Figure 8), the modeled U along at 136.9°E/23.29°N has a core speed of ∼3 cm s −1 , much smaller than that at KPRM. This yields nearly zero transport through this channel during the measurement period.…”

Section: Resultssupporting

confidence: 86%

Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin

Wang

et al. 2023

Geophysical Research Letters

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 86%

Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin

Wang

et al. 2023

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…The distribution of the drifts and their adjacent moats along the southern to southwestern side of the seafloor highs (Figures 2 and S2 in Supporting Information S1) suggests Coriolis force-induced westward water mass circulation (Faugères et al, 1999;Rebesco et al, 2014) that matches the PDW circulation (Nagano et al, 2018;Talley et al, 2011). The two contourite depositional systems are consistent with PDW's present-day location and water depth at 1,000-4,500 m below the sea level (Kaneko et al, 2001;Talley et al, 2011;Tian et al, 2021; Figures 1d and 1e). Hence, the chronologically consistent sedimentation patterns and stratigraphic discontinuities in the two systems provide an opportunity to discuss their evolution and formation by PDW circulation, and to use them as proxy to reconstruct long-term variations in PDW circulation.…”

Section: Regional Correlations In Contourite Seismic Stratigraphysupporting

confidence: 71%

“…Subduction zone from Müller et al., 2016. Ocean circulation compiled from Kawabe & Fujio, 2010; Talley et al., 2011; Nagano et al., 2018; Tian et al., 2021. (b) Bathymetric map at International Ocean Discovery Program Site U1437 with seismic lines.…”

Section: Introductionmentioning

confidence: 99%

Progressive Intensification of Pacific Deep Water Circulation Since the Early Pliocene

Yin

Hernández‐Molina

Jutzeler

et al. 2022

Geophysical Research Letters

View full text Add to dashboard Cite

An important stage in global ocean overturning circulation is the upwelling of the Antarctic Bottom Water into the Pacific Deep Water (PDW). The long‐term evolution of PDW circulation, however, is scarcely addressed. We use seismic reflection data and cores from the International Ocean Discovery Program (and its predecessors) in contourites to reconstruct regional deep ocean circulation patterns. Here, we demonstrate that PDW circulation was progressively enhanced at about 4.35, 3.84, 2.16, and 0.97 Ma since the early Pliocene. Coeval growth of volcanic arcs and tectonic uplifts gradually isolated marginal seas from the PDW and, in conjunction with climate cooling, effectively increasing deep‐water flux within a shrinking Pacific basin. Regional stratigraphic discontinuities in contourites indicate thresholds in the intensification of ocean circulation.

show abstract

“…Based on mooring data, Siedler et al (2004) suggested that 0.36 Sv LCPW flows into the West Mariana Basin via the junction. Tian et al (2021) proposed that since the junction is the only channel deeper than ~4000 m connecting to the Philippine Sea, the LCPW enters the sea through the junction area. Zhai and Gu (2020) suggested that because of the blockage of the Yap Ridge, the main body of the LCPW flowing from the East Mariana Basin enters the Philippine Sea via the Mariana Trench and the junction.…”

Section: Flow Path In Yap-mariana Junctionmentioning

confidence: 99%

“…Zhai and Gu (2020) suggested that because of the blockage of the Yap Ridge, the main body of the LCPW flowing from the East Mariana Basin enters the Philippine Sea via the Mariana Trench and the junction. In studies by Zhai and Gu (2020) and Tian et al (2021), the LCPW incoming area of the Philippine Sea corresponds to the West Mariana Basin.…”

Section: Flow Path In Yap-mariana Junctionmentioning

confidence: 99%

Flow Pathways of Abyssal Water in the Yap Trench and Adjacent Channels and Basins

Liu

Cao

et al. 2022

Front. Mar. Sci.

View full text Add to dashboard Cite

Abyssal flow pathways in the Yap Trench and adjacent regions were investigated by computing geostrophic flows and analyzing water properties. Using boundary values of potential temperature, salinity, oxygen, and silicate, the upper and lower Circumpolar Deep Waters (UCPW, LCPW) were identified as the main abyssal water masses in the trench. At the western East Mariana Basin, some of the LCPW enters the southern Mariana Trench, and the remainder reaches the northern basin and then partly turns to the northern Mariana Trench, eventually joining the southern trench. At the Yap-Mariana Junction, some LCPW enters the West Mariana Basin, and the remainder passes the region east of the Yap Trench and then flows or subsides to the northern and southern trenches, respectively. In the northern trench, the LCPW flows north into the West Mariana Basin. The UCPW enters the northern Yap Trench via the East Mariana Basin and the Mariana Trench, reaches the sill of the Yap Trench via the East Caroline Basin and a narrow channel, and enters the southern trench via the East/West Caroline and Philippine Basins. The UCPW and LCPW circulate anticlockwise in the southern trench and in the northern region of it, respectively. The LCPW may be driven by the downwelling in the trench.

show abstract

Water‐Mass Properties and Circulation in the Deep and Abyssal Philippine Sea

Cited by 12 publications

References 71 publications

Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin

Abyssal Circulation From the Yap‐Mariana Junction to the Northern Philippine Basin

Progressive Intensification of Pacific Deep Water Circulation Since the Early Pliocene

Flow Pathways of Abyssal Water in the Yap Trench and Adjacent Channels and Basins

Contact Info

Product

Resources

About