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Author Morrow, R.M. ; Ohman, M.D. ; Goericke, R. ; Kelly, T.B. ; Stephens, B.M. ; Stukel, M.R.
Title CCE V: Primary production, mesozooplankton grazing, and the biological pump in the California Current Ecosystem: Variability and response to El Niño Type $loc['typeJournal Article']
Year 2018 Publication Deep Sea Research Part I: Oceanographic Research Papers Abbreviated Journal Deep Sea Research Part I: Oceanographic Research Papers
Volume 140
Issue Pages 52-62
Keywords Carbon export ; Fecal pellets ; Sinking particles ; Interannual variability ; Net primary productivity ; Eastern boundary upwelling system
Abstract Predicting marine carbon sequestration in a changing climate requires mechanistic understanding of the processes controlling sinking particle flux under different climatic conditions. The recent occurrence of a warm anomaly (2014-2015) followed by an El Nino (2015-2016) in the southern sector of the California Current System presented an opportunity to analyze changes in the biological carbon pump in response to altered climate forcing. We compare primary production, mesozooplankton grazing, and carbon export from the euphotic zone during quasi-Lagrangian experiments conducted in contrasting conditions: two cruises during warm years – one during the warm anomaly in 2014 and one toward the end of El Nino 2016 – and three cruises during El Ninoneutral years. Results showed no substantial differences in the relationships between vertical carbon export and its presumed drivers (primary production, mesozooplankton grazing) between warm and neutral years. Mesozooplankton fecal pellet enumeration and phaeopigment measurements both showed that fecal pellets were the dominant contributor to export in productive upwelling regions. In more oligotrophic regions, fluxes were dominated by amorphous marine snow with negligible pigment content. We found no evidence for a significant shift in the relationship between mesozooplankton grazing rate and chlorophyll concentration. However, massspecific grazing rates were lower at low-to-moderate chlorophyll concentrations during warm years relative to neutral years. We also detected a significant difference in the relationship between phytoplankton primary production and photosynthetically active radiation between years: at similar irradiance and nutrient concentrations, productivity decreased during the warm events. Whether these changes resulted from species composition changes remains to be determined. Overall, our results suggest that the processes driving export remain similar during different climate conditions, but that species compositional changes or other structural changes require further attention.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 0967-0637
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Funding Approved $loc['no']
Call Number COAPS @ user @
Serial 1021
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Author Kelly, T.B. ; Goericke, R. ; Kahru, M. ; Song, H. ; Stukel, M.R.
Title CCE II: Spatial and interannual variability in export efficiency and the biological pump in an eastern boundary current upwelling system with substantial lateral advection Type $loc['typeJournal Article']
Year 2018 Publication Deep Sea Research Part I: Oceanographic Research Papers Abbreviated Journal Deep Sea Research Part I: Oceanographic Research Papers
Volume 140
Issue Pages 14-25
Keywords CALIFORNIA CURRENT ECOSYSTEM ; OCEAN CARBON-CYCLE ; COASTAL WATERS ; FRONTAL ZONE ; TIME-SERIES ; FLUX ; SINKING ; SEA ; PACIFIC ; ZOOPLANKTON
Abstract Estimating interannual variability in carbon export is a key goal of many marine biogeochemical studies. However, due to variations in export mechanisms between regions, generalized models used to estimate global patterns in export often fail when used for intra-regional analysis. We present here a region-specific model of export production for the California Current Ecosystem (CCE) parameterized using intensive Lagrangian process studies conducted during El Niño-Southern Oscillation (ENSO) warm and neutral phases by the CCE Long-Term Ecological Research (LTER) program. We find that, contrary to expectations from prominent global algorithms, export efficiency (e-ratio = export / primary productivity) is positively correlated with temperature and negatively correlated with net primary productivity (NPP). We attribute these results to the substantial horizontal advection found within the region, and verify this assumption by using a Lagrangian particle tracking model to estimate water mass age. We further suggest that sinking particles in the CCE are comprised of a recently-produced, rapidly-sinking component (likely mesozooplankton fecal pellets) and a longer-lived, slowly-sinking component that is likely advected long distances prior to export. We determine a new algorithm for estimating particle export in the CCE from NPP (Export = 0.08 · NPP + 72 mg C m-2 d-1). We apply this algorithm to a two-decade long time series of NPP in the CCE to estimate spatial and interannual variability across multiple ENSO phases. Reduced export during the warm anomaly of 2014-2015 and El Niño 2015-2016 resulted primarily from decreased export in the coastal upwelling region of the CCE; the oligotrophic offshore region exhibited comparatively low seasonal and interannual variability in flux. The model resolves intra-regional patterns of in situ export measurements, and provides a valuable contrast to global export models.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0967-0637
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Funding Approved $loc['no']
Call Number COAPS @ rl18 @
Serial 984
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Author Kelly, T.B. ; Goericke, R. ; Kahru, M. ; Song, H. ; Stukel, M.R.
Title CCE II: Spatial and interannual variability in export efficiency and the biological pump in an eastern boundary current upwelling system with substantial lateral advection Type $loc['typeJournal Article']
Year 2018 Publication Deep Sea Research Part I: Oceanographic Research Papers Abbreviated Journal Deep Sea Research Part I: Oceanographic Research Papers
Volume 140
Issue Pages 14-25
Keywords california current ecosystem ; coastal waters ; flux ; frontal zone ; ocean carbon-cycle ; oceanography ; pacific ; sea ; sinking ; time-series ; Zooplankton
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ISSN 0967-0637
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Funding Approved $loc['no']
Call Number COAPS @ user @
Serial 1022
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Author Goni, G. ; DeMaria, M. ; Knaff, J. ; Sampson, C. ; Ginis, I. ; Bringas, F. ; Mavume, A. ; Lauer, C. ; Lin, I.I. ; Ali, M.M. ; Sandery, P. ; Ramos-Buarque, S. ; Kang, K.R. ; Mehra, A. ; Chassignet, E. ; Halliwell, G.
Title Applications of Satellite-Derived Ocean Measurements to Tropical Cyclone Intensity Forecasting Type $loc['typeJournal Article']
Year 2009 Publication Oceanography Abbreviated Journal Oceanog.
Volume 22
Issue 3
Pages 190-197
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Series Editor Series Title Abbreviated Series Title
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ISSN 1042-8275
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Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 384
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Author Garcia-Pineda, O. ; MacDonald, I. ; Hu, C. ; Svejkovsky, J. ; Hess, M. ; Dukhovskoy, D. ; Morey, S.
Title Detection of Floating Oil Anomalies From the Deepwater Horizon Oil Spill With Synthetic Aperture Radar Type $loc['typeJournal Article']
Year 2013 Publication Oceanography Abbreviated Journal oceanog
Volume 26
Issue 2
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ISSN 1042-8275
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Funding Deep-C, BOEM
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 213
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Author Dombrowsky, E. ; Bertino, L. ; Brassington, G. ; Chassignet, E. ; Davidson, F. ; Hurlburt, H. ; Kamachi, M. ; Lee, T. ; Martin, M. ; Mei, S. ; Tonani, M.
Title GODAE Systems in Operation Type $loc['typeJournal Article']
Year 2009 Publication Oceanography Abbreviated Journal Oceanog.
Volume 22
Issue 3
Pages 80-95
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ISSN 1042-8275
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Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 382
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Author Hurlburt, H. ; Brassington, G. ; Drillet, Y. ; Kamachi, M. ; Benkiran, M. ; Bourdallé-Badie, R. ; Chassignet, E. ; Jacobs, G. ; Galloudec, O. ; Lellouche, J.-M. ; Metzger, E.J. ; Oke, P. ; Pugh, T. ; Schiller, A. ; Smedstad, O. ; Tranchant, B. ; Tsujino, H. ; Usui, N. ; Wallcraft, A.
Title High-Resolution Global and Basin-Scale Ocean Analyses and Forecasts Type $loc['typeJournal Article']
Year 2009 Publication Oceanography Abbreviated Journal Oceanog.
Volume 22
Issue 3
Pages 110-127
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ISSN 1042-8275
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Call Number COAPS @ mfield @
Serial 675
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Author Cornillon, P. ; Adams, J. ; Blumenthal, M.B. ; Chassignet, E. ; Davis, E. ; Hankin, S. ; Kinter, J. ; Mendelssohn, R. ; Potemra, J. ; Srinivasan, A. ; Sirott, J.
Title NVODS and the Development of OPeNDAP Type $loc['typeJournal Article']
Year 2009 Publication Oceanography Abbreviated Journal Oceanog.
Volume 22
Issue 2
Pages 116-127
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ISSN 1042-8275
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Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 391
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Author Bourassa, M. ; Gille, S. ; Jackson, D. ; Roberts, J.B. ; Wick, G.
Title Ocean Winds and Turbulent Air-Sea Fluxes Inferred From Remote Sensing Type $loc['typeJournal Article']
Year 2010 Publication Oceanography Abbreviated Journal Oceanog.
Volume 23
Issue 4
Pages 36-51
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ISSN 1042-8275
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Funding NASA, OVWST, NOAA, OCO
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 366
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Author Özgökmen, T. ; Chassignet, E. ; Dawson, C. ; Dukhovskoy, D. ; Jacobs, G. ; Ledwell, J. ; Garcia-Pineda, O. ; MadDonald, I. ; Morey, S. ; Olascoaga, M. ; Poje, A. ; Reed, M. ; Skancke, J.
Title Over What Area Did the Oil and Gas Spread During the 2010 Deepwater Horizon Oil Spill? Type $loc['typeJournal Article']
Year 2016 Publication Oceanography Abbreviated Journal Oceanog
Volume 29
Issue 3
Pages 96-107
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ISSN 1042-8275
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Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 87
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