Decadal water‐property trends in the California Undercurrent, with implications for ocean acidification
M. Meinvielle,Gregory C. Johnson +1 more
TLDR
In this paper, a large-scale analysis of water-property spatial structure and temporal trends in the California Current System (CCS) was performed using data along the West Coast of North America to analyze the spatial and temporal evolution of water properties to around 500 m depth, finding significant trends from 1980 to 2012 along density surfaces near the core of the California Undercurrent, including decreasing dissolved oxygen (DO) concentration, increasing warmth and salinity, and decreasing potential vorticity.Abstract:
[1] This study uses data along the West Coast of North America to analyze the spatial and temporal evolution of water properties to around 500 m depth The analysis uses potential density ( σθ) as the vertical coordinate and bottom depth and latitude as the horizontal coordinates The study uses historical data from the World Ocean Database 2009 from 25°N to 50°N and 1950–2012 for a large-scale analysis of water-property spatial structure and temporal trends in the California Current System (CCS), finding significant trends from 1980 to 2012 along density surfaces near the core of the California Undercurrent (CUC), including decreasing dissolved oxygen (DO) concentration, increasing warmth and salinity, and decreasing potential vorticity All these changes are consistent with an increasing influence of Pacific equatorial waters with time Mixing characteristics along the core of the CUC ( σθ=265 kg m−3) reveal that the 1980–2012 trends in the water-mass properties in the CUC are mostly consistent with a northward shift of these properties, with additional decreases in DO concentration These modifications are associated with the shoaling and strengthening of the CUC The changes also imply increased ocean total (natural and anthropogenic) acidification, as the trend in the DO concentration is consistent with a natural decrease in pH all along the CUC, suggesting that significantly more acidic waters are feeding upwelling onto the shelf around 2012 than around 1980read more
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Manifestation, Drivers, and Emergence of Open Ocean Deoxygenation.
TL;DR: The paleo-record reflects drivers of and feedbacks to deoxygenation that have played out through the Phanerozoic on centennial, millennial, and hundred-million-year timescales, and new modeling efforts now project emergence to occur in many areas in 15-25 years.
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Changes in source waters to the Southern California Bight
Steven J. Bograd,Mercedes Pozo Buil,Emanuele Di Lorenzo,Carmen G. Castro,Isaac D. Schroeder,Ralf Goericke,Clarissa Anderson,Claudia R. Benitez-Nelson,Frank A. Whitney +8 more
TL;DR: In this article, historical hydrographic data (1984-2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California.
Journal ArticleDOI
Seasonal and interannual oxygen variability on the Washington and Oregon continental shelves
Samantha A. Siedlecki,Neil S. Banas,Kristen A. Davis,Sarah N. Giddings,Barbara M. Hickey,Parker MacCready,Thomas P. Connolly,S. Geier +7 more
TL;DR: In this article, 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.
Journal ArticleDOI
System controls of coastal and open ocean oxygen depletion
Grant C. Pitcher,Arturo Aguirre-Velarde,Denise L. Breitburg,Jorge Cardich,Jacob Carstensen,Daniel J. Conley,Boris Dewitte,Anja Engel,Dante Espinoza-Morriberón,Georgina Flores,Véronique Garçon,Michelle Graco,Marilaure Grégoire,Dimitri Gutiérrez,José Martín Hernández-Ayón,Huai Hsuan May Huang,Huai Hsuan May Huang,Kirsten Isensee,María E. Jacinto,Lisa A. Levin,Alberto Lorenzo,Eric Machu,Eric Machu,Lander Merma,Ivonne Montes,Naqvi Swa,Aurélien Paulmier,Michael R. Roman,Kenneth A. Rose,Raleigh R. Hood,Nancy N. Rabalais,Anne Gro V. Salvanes,Renato Salvatteci,Sonia Sánchez,Abdelfettah Sifeddine,Abdoul Wahab Tall,Anja van der Plas,Moriaki Yasuhara,Moriaki Yasuhara,Jing Zhang,Jing Zhang,Zhuoyi Zhu,Zhuoyi Zhu +42 more
TL;DR: A review of system-specific drivers of low oxygen in a range of case studies representing marine systems in the open ocean, on continental shelves, in enclosed seas and in the coastal environment is provided in this article.
Journal ArticleDOI
Seasonal-to-interannual prediction of North American coastal marine ecosystems: Forecast methods, mechanisms of predictability, and priority developments
Michael G. Jacox,Michael G. Jacox,Michael A. Alexander,Samantha A. Siedlecki,Ke Chen,Young-Oh Kwon,Stephanie Brodie,Stephanie Brodie,Ivonne Ortiz,Ivonne Ortiz,Desiree Tommasi,Desiree Tommasi,Matthew J. Widlansky,Daniel Barrie,Antonietta Capotondi,Antonietta Capotondi,Wei Cheng,Wei Cheng,Emanuele Di Lorenzo,Christopher A. Edwards,Jerome Fiechter,Paula S. Fratantoni,Elliott L. Hazen,Albert J. Hermann,Albert J. Hermann,Arun Kumar,Arthur J. Miller,Douglas E. Pirhalla,Mercedes Pozo Buil,Mercedes Pozo Buil,Sulagna Ray,Scott C. Sheridan,Aneesh C. Subramanian,Philip R. Thompson,Lesley H. Thorne,H. Annamalai,Kerim Aydin,Steven J. Bograd,Roger Griffis,Kelly A. Kearney,Kelly A. Kearney,Hye-Mi Kim,Annarita Mariotti,Mark A. Merrifield,Ryan R. Rykaczewski +44 more
TL;DR: In this article, a review of the state of the knowledge on forecasting techniques and mechanisms underlying marine ecosystem predictability is presented, with a focus on coastal marine ecosystems surrounding North America (and the U.S. in particular).
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