GLORIA — GEOMAR Library Ocean Research Information Access

Hits per page

hits 1 - 2 | 2 hits

Sorting

Unknown

Seasonal and interannual oxygen variability on the Washington and Oregon continental shelves (2015)

Siedlecki, Samantha A. ; Banas, Neil S. ; Davis, Kristen A. ; [et al.]

John Wiley & Sons

add to mindlist on the mindlist

Details

Publication Date: 2022-05-25

Description: Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 608–633, doi:10.1002/2014JC010254.

Description: The coastal waters of the northern portion of the California Current System experience a seasonal decline in oxygen concentrations and hypoxia over the summer upwelling season that results in negative impacts on habitat for many organisms. Using a regional model extending from 43°N to 50°N, with an oxygen component developed in this study, drivers of seasonal and regional oxygen variability are identified. The model includes two pools of detritus, which was an essential addition in order to achieve good agreement with the observations. The model was validated using an extensive array of hydrographic and moored observations. The model captures the observed seasonal decline as well as spatial trends in bottom oxygen. Spatially, three regions of high respiration are identified as locations where hypoxia develops each modeled year. Two of the regions are previously identified recirculation regions. The third region is off of the Washington coast. Sediment oxygen demand causes the region on the Washington coast to be susceptible to hypoxia and is correlated to the broad area of shallow shelf (〈60 m) in the region. Respiration and circulation-driven divergence contribute similar (60, 40%, respectively) amounts to the integrated oxygen budget on the Washington coast while respiration dominates the Oregon coast. Divergence, or circulation, contributes to the oxygen dynamics on the shelf in two ways: first, through the generation of retention features, and second, by determining variability.

Description: This work was supported by a postdoctoral fellowship to Samantha Siedlecki from JISAO and the Program on Climate Change at the University of Washington, and grants from the Coastal Ocean Program of the National Oceanic and Atmospheric Administration (NOAA) (NA09NOS4780180) and the National Science Foundation (NSF) (OCE0942675) as part of the Pacific Northwest Toxins (PNWTOX) project.

Description: 2015-08-05

Keywords: Hypoxia ; Oxygen ; Respiration ; Upwelling

Repository Name: Woods Hole Open Access Server

Type: Article

Format: application/pdf

Permalink

	Location	Call Number	Limitation	Availability

Others were also interested in ...

PAPER (OA)

Fulltext

Unknown

A science plan for carbon cycle research in North American coastal waters. Report of the Coastal CARbon Synthesis (CCARS) community workshop, August 19-21, 2014 (2016)

Benway, Heather M. ; Alin, Simone R. ; Boyer, Elizabeth ; [et al.]

Ocean Carbon & Biogeochemistry Program

add to mindlist on the mindlist

Details

Publication Date: 2022-05-26

Description: Workshop held August 19-21, 2014, Woods Hole, MA

Description: Relative to their surface area, continental margins represent some of the largest carbon fluxes in the global ocean, but sparse and sporadic sampling in space and time makes these systems difficult to characterize and quantify. Recognizing the importance of continental margins to the overall North American carbon budget, terrestrial and marine carbon cycle scientists have been collaborating on a series of synthesis, carbon budgeting, and modeling exercises for coastal regions of North America, which include the Gulf of Mexico, the Laurentian Great Lakes (LGL), and the coastal waters of the Atlantic, Pacific, and Arctic Oceans. The Coastal CARbon Synthesis (CCARS) workshops and research activities have been conducted over the past several years as a partner activity between the Ocean Carbon and Biogeochemistry (OCB) Program and the North American Carbon Program (NACP) to synthesize existing data and improve quantitative assessments of the North American carbon budget.

Description: The authors of this science plan wish to acknowledge the generous support of NASA (NNX10AU78G) and NSF (OCE-1107285) for all of the CCARS activities, including a kickoff meeting (December 2010), a series of regional workshops (Atlantic coast, Gulf of Mexico, Pacific coast), and the final community workshop (August 2014).