Records |
Author |
Stukel, M.R.; Benitez-Nelson, C.R.; Decima, M.; Taylor, A.G.; Buchwald, C.; Landry, M.R. |
Title |
The biological pump in the Costa Rica Dome: an open-ocean upwelling system with high new production and low export |
Type |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
Journal of Plankton Research |
Abbreviated Journal |
J Plankton Res |
Volume |
38 |
Issue |
2 |
Pages |
348-365 |
Keywords |
Eastern Tropical Pacific; biogeochemistry; carbon flux; nutrients; plankton |
Abstract |
The Costa Rica Dome is a picophytoplankton-dominated, open-ocean upwelling system in the Eastern Tropical Pacific that overlies the ocean's largest oxygen minimum zone. To investigate the efficiency of the biological pump in this unique area, we used shallow (90-150 m) drifting sediment traps and 234Th:238U deficiency measurements to determine export fluxes of carbon, nitrogen and phosphorus in sinking particles. Simultaneous measurements of nitrate uptake and shallow water nitrification allowed us to assess the equilibrium balance of new and export production over a monthly timescale. While f-ratios (new:total production) were reasonably high (0.36 +/- 0.12, mean +/- standard deviation), export efficiencies were considerably lower. Sediment traps suggested e-ratios (export/14C-primary production) at 90-100 m ranging from 0.053 to 0.067. ThE-ratios (234Th disequilibrium-derived export) ranged from 0.038 to 0.088. C:N and N:P stoichiometries of sinking material were both greater than canonical (Redfield) ratios or measured C:N of suspended particulates, and they increased with depth, suggesting that both nitrogen and phosphorus were preferentially remineralized from sinking particles. Our results are consistent with an ecosystem in which mesozooplankton play a major role in energy transfer to higher trophic levels but are relatively inefficient in mediating vertical carbon flux to depth, leading to an imbalance between new production and sinking flux. |
Address |
Scripps Institution of Oceanography , University of California at San Diego , La Jolla, CA 92037 , USA |
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0142-7873 |
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PMID:27275035; PMCID:PMC4889986 |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
90 |
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Author |
Landry, M.R.; Selph, K.E.; Decima, M.; Gutierrez-Rodriguez, A.; Stukel, M.R.; Taylor, A.G.; Pasulka, A.L. |
Title |
Phytoplankton production and grazing balances in the Costa Rica Dome |
Type |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
Journal of Plankton Research |
Abbreviated Journal |
J Plankton Res |
Volume |
38 |
Issue |
2 |
Pages |
366-379 |
Keywords |
grazing; plankton community; productivity |
Abstract |
We investigated phytoplankton production rates and grazing fates in the Costa Rica Dome (CRD) during summer 2010 based on dilution depth profiles analyzed by flow cytometry and pigments and mesozooplankton grazing assessed by gut fluorescence. Three community production estimates, from 14C uptake (1025 +/- 113 mg C m-2 day-1) and from dilution experiments analyzed for total Chla (990 +/- 106 mg C m-2 day-1) and flow cytometry populations (862 +/- 71 mg C m-2 day-1), exceeded regional ship-based values by 2-3-fold. Picophytoplankton accounted for 56% of community biomass and 39% of production. Production profiles extended deeper for Prochlorococcus (PRO) and picoeukaryotes than for Synechococcus (SYN) and larger eukaryotes, but 93% of total production occurred above 40 m. Microzooplankton consumed all PRO and SYN growth and two-third of total production. Positive net growth of larger eukaryotes in the upper 40 m was balanced by independently measured consumption by mesozooplankton. Among larger eukaryotes, diatoms contributed approximately 3% to production. On the basis of this analysis, the CRD region is characterized by high production and grazing turnover, comparable with or higher than estimates for the eastern equatorial Pacific. The region nonetheless displays characteristics atypical of high productivity, such as picophytoplankton dominance and suppressed diatom roles. |
Address |
Scripps Institution of Oceanography, 9500 Gilman Dr., La Jolla, CA 92093-0227, USA; Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA |
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0142-7873 |
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PMID:27275036; PMCID:PMC4889984 |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
85 |
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Author |
Lobodin, V.V.; Maksimova, E.V.; Rodgers, R.P. |
Title |
Gas Chromatography/Atmospheric Pressure Chemical Ionization Tandem Mass Spectrometry for Fingerprinting the Macondo Oil Spill |
Type |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
Analytical Chemistry |
Abbreviated Journal |
Anal Chem |
Volume |
88 |
Issue |
13 |
Pages |
6914-6922 |
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Abstract |
We report the first application of a new mass spectrometry technique (gas chromatography combined to atmospheric pressure chemical ionization tandem mass spectrometry, GC/APCI-MS/MS) for fingerprinting a crude oil and environmental samples from the largest accidental marine oil spill in history (the Macondo oil spill, the Gulf of Mexico, 2010). The fingerprinting of the oil spill is based on a trace analysis of petroleum biomarkers (steranes, diasteranes, and pentacyclic triterpanes) naturally occurring in crude oil. GC/APCI enables soft ionization of petroleum compounds that form abundant molecular ions without (or little) fragmentation. The ability to operate the instrument simultaneously in several tandem mass spectrometry (MS/MS) modes (e.g., full scan, product ion scan, reaction monitoring) significantly improves structural information content and sensitivity of analysis. For fingerprinting the oil spill, we constructed diagrams and conducted correlation studies that measure the similarity between environmental samples and enable us to differentiate the Macondo oil spill from other sources. |
Address |
National High Magnetic Field Laboratory, Florida State University , 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States |
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0003-2700 |
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PMID:27281271 |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
40 |
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Author |
Conlon, K.C.; Kintziger, K.W.; Jagger, M.; Stefanova, L.; Uejio, C.K.; Konrad, C. |
Title |
Working with Climate Projections to Estimate Disease Burden: Perspectives from Public Health |
Type |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
International Journal of Environmental Research and Public Health |
Abbreviated Journal |
Int J Environ Res Public Health |
Volume |
13 |
Issue |
8 |
Pages |
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Keywords |
*Climate Change/statistics & numerical data; Florida; Forecasting; Humans; Models, Theoretical; Public Health/*trends; United States; adaptation; attributable fraction; climate modeling; project disease burden; public health |
Abstract |
There is interest among agencies and public health practitioners in the United States (USA) to estimate the future burden of climate-related health outcomes. Calculating disease burden projections can be especially daunting, given the complexities of climate modeling and the multiple pathways by which climate influences public health. Interdisciplinary coordination between public health practitioners and climate scientists is necessary for scientifically derived estimates. We describe a unique partnership of state and regional climate scientists and public health practitioners assembled by the Florida Building Resilience Against Climate Effects (BRACE) program. We provide a background on climate modeling and projections that has been developed specifically for public health practitioners, describe methodologies for combining climate and health data to project disease burden, and demonstrate three examples of this process used in Florida. |
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Department of Geography, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3220, USA. konrad@unc.edu |
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1660-4601 |
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PMID:27517942; PMCID:PMC4997490 |
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$loc['no'] |
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COAPS @ mfield @ |
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73 |
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Author |
Liu, J.; Feld, D.; Xue, Y.; Garcke, J.; Soddemann, T.; Pan, P. |
Title |
An efficient geosciences workflow on multi-core processors and GPUs: a case study for aerosol optical depth retrieval from MODIS satellite data |
Type |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
International Journal of Digital Earth |
Abbreviated Journal |
International Journal of Digital Earth |
Volume |
9 |
Issue |
8 |
Pages |
748-765 |
Keywords |
Digital earth; high-performance computing; GPU; multi-core; hybrid parallel pattern; aerosol optical depth; retrieval workflow |
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1753-8947 |
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$loc['no'] |
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COAPS @ mfield @ |
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86 |
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Author |
Groenen, D.; Misra, V. |
Title |
Characterization of the Rainy Season of Mesoamerica |
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$loc['typeConference Article'] |
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2016 |
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American Meteorological Society |
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32nd Conference on Hurricanes and Tropical Meteorology |
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$loc['no'] |
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COAPS @ mfield @ |
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76 |
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Author |
Xue, W.; Xin, X.; Zhang, J.; Zhang, W.; Wu, H.; Huang, Z.; Zhang, T.; Li, H.; Ding, N.; Huang H. |
Title |
Development and Testing of a Multi-model Ensemble Coupling Framework |
Type |
$loc['typeBook Chapter'] |
Year |
2016 |
Publication |
Development and Evaluation of High Resolution Climate System Models |
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163-208 |
Keywords |
Climate system model; Ensemble coupling platform; Atmospheric noise; Process layout |
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Springer |
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$loc['no'] |
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COAPS @ mfield @ |
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91 |
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Author |
Cintra, R.; Campos Velho, H.; Cocke, S. |
Title |
Multilayer Perceptron on data assimilation system applied to FSU global model |
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$loc['typeConference Article'] |
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2016 |
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data assimilation; artificial neural networks; numerical weather prediction; inverse problem |
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3rd International Symposium on Uncertainty Quantification and Stochastic Modeling Maresias, Brazil: 15/2/2016 to 19/2/2016 |
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$loc['no'] |
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COAPS @ mfield @ |
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88 |
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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 |
$loc['typeJournal Article'] |
Year |
2016 |
Publication |
Oceanography |
Abbreviated Journal |
Oceanog |
Volume |
29 |
Issue |
3 |
Pages |
96-107 |
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1042-8275 |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
87 |
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