4.6 Review

Oceanic conditions in the Barrow Coastal Polynya revealed by a 10-year mooring time series

Journal

PROGRESS IN OCEANOGRAPHY
Volume 203, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pocean.2022.102781

Keywords

Long-term mooring data; Pacific Arctic; Barrow Coastal Polynya; Sea-ice production; Oceanic variability and change; Climate change

Categories

Funding

  1. Green Network of Excellence (GRENE) Arctic Climate Change Research Project
  2. Arctic Challenge for Sustainability projects (ArCS and ArCSII) of the Ministry of Education, Culture, Sports, Science and Technology
  3. Japan Aerospace Exploration Agency (JAXA) [RA1W403, ER2GWF404]
  4. Institute of Low Temperature Science, Hokkaido University
  5. Japan Arctic Research Network Center
  6. National Science Foundation's Arctic Observing Network program (Seasonal Ice Zone Observing Network award) [OPP-0856867]
  7. US Department of Homeland Security Center for Island, Maritime and Extreme Environment Security (CIMES)
  8. [20221001]
  9. [23654163]
  10. [15H03721]
  11. [17H01157]
  12. [20H05707]

Ask authors/readers for more resources

The study confirms that the Barrow Coastal Polynya (BCP) is a wind-driven polynya dominated by interannual variability. The presence of warm water delays freeze onset and influences heat transport in the Chukchi Shelf and Arctic basin.
From 2009 to 2021, continuous mooring observations were conducted within the Barrow Coastal Polynya (BCP) on the northeastern Chukchi Shelf. With a 10-year mooring record (2009-2019), satellite-derived sea-ice production (SIP) data, and atmospheric reanalysis, we confirm that the BCP is a wind-driven hybrid latent and sensible heat polynya forced by northeasterly winds, and we analyze oceanic conditions and their recent changes associated with winter processes such as freeze onset, SIP, and winter-water production. The decade-long record of SIP and warm water upwelling in the BCP is dominated by interannual variability with no discernable longterm trend. In the 2015/2016 season, the SIP reached a record high for the time period studied. Water temperature and salinity prior to the freeze-up period are directly associated with SIP and winter-water production. Although wintertime SIP-related salt input is necessary, autumn salinity is, in some cases, more critical in determining winter water characteristics. The 10-year BCP mooring captures the regional changes in oceanic conditions. Summer-to-autumn ocean temperatures have been increasing as of late, especially since 2016. The prolonged presence of warmer water suggests a direct influence on freeze onset over the Chukchi Shelf and enhanced heat transport into the Arctic basin. In some cases, the upwelled Atlantic-origin warm water also delays freeze onset in the BCP. The 10-year mooring record provides evidence of recent extreme oceanic warming combined with remote and local connections from the Bering to the Chukchi Sea. This collection of data improves understanding of the impact of oceanic changes in Chukchi coastal and inner shelf waters, and regional change in the Pacific Arctic in a rapidly changing climate.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available