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dc.contributor.authorWhite, Margot E.  Concept link
dc.contributor.authorRafter, Patrick  Concept link
dc.contributor.authorStephens, Brandon M.  Concept link
dc.contributor.authorWankel, Scott D.  Concept link
dc.contributor.authorAluwihare, Lihini I.  Concept link
dc.date.accessioned2019-10-08T15:32:41Z
dc.date.issued2019-06-11
dc.identifier.citationWhite, M. E., Rafter, P. A., Stephens, B. M., Wankel, S. D., & Aluwihare, L. I. (2019). Recent increases in water column denitrification in the seasonally suboxic bottom waters of the Santa Barbara Basin. Geophysical Research Letters, 46(12), 6786-6795.en_US
dc.identifier.urihttps://hdl.handle.net/1912/24675
dc.descriptionAuthor Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 46(12), (2019): 6786-6795, doi:10.1029/2019GL082075.en_US
dc.description.abstractDenitrification in the anoxic sediments of the Santa Barbara Basin has been well documented in the historic and modern record, but the regulation of and frequency with which denitrification occurs in the overlying water column are less understood. Since 2004, the magnitude and speciation of redox active nitrogen species in bottom waters have changed markedly. Most notable are periods of decreased nitrate and increased nitrite concentrations. Here we examine these changes in nitrogen cycling as recorded by the stable isotopes of dissolved nitrate from 2010–2016. When compared to previous studies, our data identify an increase in water column denitrification in the bottom waters of the basin. Observations from inside the basin as well as data from the wider California Current Ecosystem implicate a long‐term trend of decreasing oxygen concentrations as the driver for these observed changes, with ramifications for local benthic communities and regional nitrogen loss.en_US
dc.description.sponsorshipWe thank CalCOFI and Shonna Dovel for sample collection and two anonymous reviewers for improving the manuscript. Thanks also to Daniel Sigman for useful discussions, and Zoe Sandwith and Jen Karolewski for help with sample analysis. Data sets presented here were supported in part by CCE‐LTER augmented funding (NSF grant OCE‐1026607). Additional funding came from the Edna Bailey Sussman Foundation and the San Diego Foundation Blasker Environment grant. All data can be accessed at http://calcofi.org and https://oceaninformatics.ucsd.edu/datazoo/catalogs/ccelter/datasets. SDW acknowledges the support of a fellowship through the Hanse‐Wissenschaftskolleg (Institute for Advanced Studies).en_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2019GL082075
dc.titleRecent increases in water column denitrification in the seasonally suboxic bottom waters of the Santa Barbara Basinen_US
dc.typeArticleen_US
dc.description.embargo2019-12-11en_US
dc.identifier.doi10.1029/2019GL082075
dc.embargo.liftdate2019-12-11


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