Physical drivers of sediment-water interaction on the Beaufort Sea shelf

Dabrowski, Jessica S.; Pickart, Robert S.; Stockwell, Dean A.; Lin, Peigen; Charette, Matthew A.

doi:10.1016/j.dsr.2022.103700

Cited by 5 publications

(3 citation statements)

References 78 publications

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“…The near-surface blanking region extended to roughly 18 m, and the bottom blanking typically extended 10 m above the seafloor. For details on the data acquisition and processing, the reader is referred to Dabrowski et al (2022). The barotropic tidal signal was removed from the velocity profiles using the Oregon State University model (Padman & Erofeeva, 2004).…”

Section: Datamentioning

confidence: 99%

“…For details on the data acquisition and processing, the reader is referred to Dabrowski et al. (2022). The barotropic tidal signal was removed from the velocity profiles using the Oregon State University model (Padman & Erofeeva, 2004).…”

Section: Datamentioning

confidence: 99%

“…Thus, net inward heat flux is estimated as 4.0 ± 4.1 Wm 2 , with a slightly larger amount of heat entering from the surface, rather than the deeper ocean, at this time of year. This inward heat flux would eventually erode the cold halocline in the absence of seasonally inflowing cold, salty water from ice formation upstream on the Bering and Chukchi shelves (e.g., Itoh et al, 2012;Pacini et al, 2019), or locally on the Beaufort shelf (Dabrowski et al, 2022;Jackson et al, 2015). have been observed (Fer, 2009;Guthrie et al, 2017).…”

Section: Heat Flux Into the Cold Halocline At The Aw Thermoclinementioning

confidence: 99%

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Turbulent Diffusivity Profiles on the Shelf and Slope at the Southern Edge of the Canada Basin

Yee,

Musgrave,

Fine

et al. 2024

JGR Oceans

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Vertical profiles of temperature microstructure at 95 stations were obtained over the Beaufort shelf and shelfbreak in the southern Canada Basin during a November 2018 research cruise. Two methods for estimating the dissipation rates of temperature variance and turbulent kinetic energy were compared using this data set. Both methods require fitting a theoretical spectrum to observed temperature gradient spectra, but differ in their assumptions. The two methods agree for calculations of the dissipation rate of temperature variance, but not for that of turbulent kinetic energy. After applying a rigorous data rejection framework, estimates of turbulent diffusivity and heat flux are made across different depth ranges. The turbulent diffusivity of temperature is typically enhanced by about one order of magnitude in profiles on the shelf compared to near the shelfbreak, and similarly near the shelfbreak compared to profiles with bottom depth >1,000 m. Depth bin means are shown to vary depending on the averaging method (geometric means tend to be smaller than arithmetic means and maximum likelihood estimates). The statistical distributions of heat flux within the surface, cold halocline, and Atlantic water layer change with depth. Heat fluxes are typically <1 Wm−2, but are greater than 50 Wm−2 in ∼8% of the overall data. These largest fluxes are located almost exclusively within the surface layer, where temperature gradients can be large.

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Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Section: Heat Flux Into the Cold Halocline At The Aw Thermoclinementioning

confidence: 99%

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Turbulent Diffusivity Profiles on the Shelf and Slope at the Southern Edge of the Canada Basin

Yee,

Musgrave,

Fine

et al. 2024

JGR Oceans

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Source partitioning of dissolved inorganic carbon addition to Pacific Winter Water in the western Arctic Ocean

Ouyang,

Fujiwara,

Nishino

et al. 2024

Limnology & Oceanography

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Pacific Winter Water (PWW) with high dissolved inorganic carbon (DIC) is the key water mass in which subsurface acidification occurs in the western Arctic Ocean. To investigate and partition carbon sources added to PWW across the Chukchi shelf to the adjacent Canada Basin, we investigated the distributions of DIC and its stable isotope (δ13C‐DIC) with other hydrographic and biogeochemical parameters during the Mirai cruise in the late summer of 2021. Using a four‐end‐member mixing model, we deciphered the water masses and separated DIC changes induced by biological processes from those induced by conservative mixing. We demonstrated that DIC dynamics in PWW were mainly controlled by the biological decomposition of organic carbon (OC). A mass balance model analysis of DIC and δ13C‐DIC suggested that the apparent δ13C signature of the respired organic carbon (δ13COCx) within PWW was −22.2‰ ± 1.1‰ on the shelf and −25.6‰ ± 1.6‰ in the basin. Therefore, we concluded that marine‐origin OC was the dominant carbon source that was decomposed in the Chukchi shelf bottom water, while respired terrestrial‐origin carbon made a major contribution to DIC pool in the basin PWW. We proposed that terrestrial OC from the Chukchi and Beaufort coastal seas could be an important carbon source, which was associated with winter water formation on the shelves and influenced by Beaufort Gyre state shift and circulation changes. This unconventional finding has important ramifications for the prediction of the future state of ocean acidification in the western Arctic Ocean.

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Radium fingerprinting traces hydrology of the global cryosphere under climate warming

Zhang,

Yi,

et al. 2025

Global and Planetary Change

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Physical drivers of sediment-water interaction on the Beaufort Sea shelf

Cited by 5 publications

References 78 publications

Turbulent Diffusivity Profiles on the Shelf and Slope at the Southern Edge of the Canada Basin

Turbulent Diffusivity Profiles on the Shelf and Slope at the Southern Edge of the Canada Basin

Source partitioning of dissolved inorganic carbon addition to Pacific Winter Water in the western Arctic Ocean

Radium fingerprinting traces hydrology of the global cryosphere under climate warming

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