Peigen Lin

The Labrador Boundary Current System in Summer and Fall: Mean, Variability, and Influence on Cross-Shelf Exchange

Peigen Lin, Robert S. Pickart, Frédéric Cyr, Stephen Snook et autres

Abstract The Labrador boundary current system significantly impacts freshwater pathways and upper-ocean stratification in the subpolar North Atlantic, which in turn influences the state of the Atlantic meridional overturning circulation. In this study, we analyze an extensive collection of shipboard hydrographic and …

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Dynamic–thermal coupling drives increasing oceanic eddy-to-ice heat fluxes in the Arctic

Ruijian Gou, Yingjie Liu, Gerrit Lohmann, Guihua Wang et autres

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Nitrate Distribution in Pacific Winter Water Along the Northern Edge of the Chukchi Sea

Yanxin Wang, Peigen Lin, Robert S. Pickart

Abstract Nutrient‐rich, Pacific‐origin winter water (PWW) is a primary source of nitrate for the western Arctic Ocean, spurring primary production at the base of the food web. This cold water exits the Chukchi Sea shelf via Herald Canyon and Barrow Canyon, which …

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Wind Forcing and Warm Water Upwelling in a Recurring Beaufort Shelf Polynya

MacKenzie Elise Jewell, N. Wang, Peigen Lin, Robert S. Pickart et autres

Abstract The Beaufort Shelf has historically been reported to exhibit limited polynya activity in winter. Yet, recent satellite observations show episodic recurrence of a large polynya west of Mackenzie Canyon, a site of significant shelf‐basin exchange. Here, we investigate satellite‐detected occurrences of …

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Wind Forcing and Warm Water Upwelling in a Recurring Beaufort Shelf Polynya

MacKenzie Elise Jewell, N. Wang, Peigen Lin, Robert S. Pickart et autres

The Beaufort Shelf has historically been reported to exhibit limited polynya activity in winter. Yet, recent satellite observations show episodic recurrence of a large polynya west of Mackenzie Canyon, a site of significant shelf-basin exchange. Here we investigate satellite-detected occurrences of this …

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Seasonal to Interannual Variation of the Beaufort Shelfbreak Jet Using Two Decades of Mooring Data, 2002–2022

Xiufei Zhang, Peigen Lin, Robert S. Pickart, Daniel J. Torres et autres

Abstract The shelfbreak jet of the Beaufort Sea is the main conduit of Pacific water progressing eastward from the Chukchi shelf, delivering heat, freshwater, and nutrients that impact the hydrographic state and ecosystem of the western Arctic Ocean. A mooring has been …

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Feedback loop between Arctic sea-ice decline and eddy dynamics: Lessons from an ultra-high resolution climate model

Ruijian Gou, Yingjie Liu, Gerrit Lohmann, Guihua Wang et autres

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Walruses are potentially exposed to paralytic shellfish toxin concentrations that impact their health during Alexandrium blooms in the Alaskan Arctic

Patrick Charapata, Evangeline Fachon, Donald Mark Anderson, Gay G. Sheffield et autres

ABSTRACT Harmful algal bloom (HAB) activity of Alexandrium catenella , a dinoflagellate that produces paralytic shellfish toxins (PSTs), has increased in the Alaskan Arctic due to warming ocean conditions. Arctic wildlife exposure to PSTs due to these blooms remains unknown. The Pacific …

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Reduced Transport of Overflow Water in the West Greenland Boundary Current System: The Role of Upstream Entrainment

Yan Sun, Robert S. Pickart, Peigen Lin, Astrid Pacini et autres

Abstract A mooring array has been maintained across the West Greenland shelf and slope since 2014 as part of the Overturning in the Subpolar North Atlantic Program (OSNAP). Here, we use the first 8 years of data to investigate the interannual variability …

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Bowhead whale faeces link increasing algal toxins in the Arctic to ocean warming

Kathi A. Lefebvre, Patrick Charapata, Raphaela Stimmelmayr, Peigen Lin et autres

Abstract Over the last two decades, ocean warming and rapid loss of sea ice have dramatically changed the Pacific Arctic marine environment1–3. These changes are predicted to increase harmful algal bloom prevalence and toxicity, as rising temperatures and larger open water areas …

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Saxitoxin Linked to Deaths of Northern Fur Seals in the Southeast Bering Sea

Kathi A. Lefebvre, Lauren M. Divine, Paul I. Melovidov, Hanna Hellen et autres

ABSTRACT In August 2024, a northern fur seal mortality event was observed on St. Paul Island, AK in the southeast (SE) Bering Sea. Ten seals in good body condition were found dead along with large accumulations of dead fish on Benson Beach …

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Upper-layer circulation at the mouth of Amundsen Gulf, Arctic Ocean

Peigen Lin, Robert S. Pickart, Maria N. Pisareva, Bill Williams

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