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Exploring Interacting Influences on the Silicon Isotopic
Biogeosciences, 11, 1371–1391, 2014 Open Access www.biogeosciences.net/11/1371/2014/ doi:10.5194/bg-11-1371-2014 Biogeosciences © Author(s) 2014. CC Attribution 3.0 License. Exploring interacting influences on the silicon isotopic composition of the surface ocean: a case study from the Kerguelen Plateau N. Coffineau, C. L. De La Rocha, and P. Pondaven Institut Universitaire Européen de la Mer, CNRS UMR6539, Université de Bretagne Occidentale, Plouzané, France Correspondence to: N. Coffineau (nathalie.coffi[email protected]) Received: 28 June 2013 – Published in Biogeosciences Discuss.: 10 July 2013 Revised: 30 November 2013 – Accepted: 21 January 2014 – Published: 12 March 2014 Abstract. This study presents six new water column profiles Finally, the choice for the parameterisation of the mixing be- of the silicon isotopic composition (δ30Si) of dissolved sili- tween the ML and the WW in terms of δ30Si (i.e. constant or con (DSi) from the Atlantic and Indian sectors of the South- allowed to vary with the seasonal migration of the thermo- ern Ocean and a variable depth box model of silica cycling cline) is critical to take into account in box model simulations in the mixed layer that was constructed to illuminate the evo- of the silica biogeochemical cycle. Altogether, these results lution of surface ocean δ30Si over the full course of a year. suggest that as a paleoceanographic proxy, δ30Si may more In keeping with previous observations, δ30Si values ranged reflect the dominant mode of production of the BSi that is from +1.9 to +2.4 ‰ in the mixed layer (ML), +1.2 to exported (i.e. -
Efficiency of the Silicate Pump at a Coastal Oligotrophic Site in The
Biogeosciences, 2, 219–229, 2005 www.biogeosciences.net/bg/2/219/ Biogeosciences SRef-ID: 1726-4189/bg/2005-2-219 European Geosciences Union Efficiency of the silicate pump at a coastal oligotrophic site in the Mediterranean Sea K. Leblanc1, B. Queguiner´ 2, P. Raimbault2, and N. Garcia2 1College of Marine Studies, University of Delaware, 700 Pilottown Road, Lewes, DE 19958, USA 2Laboratoire d’Oceanographie´ et de Biogeochimie,´ CNRS, University of Aix-Marseille II, Campus de Luminy, 13288 Marseille Cedex 9, France Received: 31 March 2005 – Published in Biogeosciences Discussions: 9 May 2005 Revised: 15 August 2005 – Accepted: 16 August 2005 – Published: 29 August 2005 Abstract. A one-year survey of the sedimenting particulate depletion of silicic acid over the entire water column which material was conducted at the SOFi site located on the edge was observed by mid-April in a companion study (Leblanc et of the continental slope in the Gulf of Lions (Northwest- al., 2003) and may cause a severe Si limitation of the diatom ern Mediterranean) between September 1999 and December spring bloom in this oligotrophic region of the Gulf of Lions. 2000. The main focus of this paper was to establish an annual budget of biogenic silica export, to describe the seasonnal pattern of Si fluxes in relation to the organic and mineral C fluxes and to quantify the Si/C decoupling processes during 1 Introduction sedimentation. The pattern of the downward flux of BSi was partly typical with increased daily sedimentation rates during Even though continental margins represent only 8% of the spring followed by smaller peaks during summer. -
Annual Report Marinemarine Science Science Institute Institute |• UC UC Santa Santa Barbara Barbara 2013 2014
ANNUAL REPORT MarineMarine Science Science Institute Institute |• UC UC Santa Santa Barbara Barbara 2013 2014 ANNUAL REPORT | 2013-2014 1 ANNUAL REPORT | 2013-2014 Table of Contents Director’s Statement 3 Organizational Charts 5 Administrative Staff 6 Centers and Units 7 Other Projects and Activities 8 Seminars, Workshops, Conferences, and Meetings 9 Coastal Research Center 17 EcoInformatics Center 19 Marine Biotechnology Center 21 National Center for Ecological Analysis and Synthesis 23 Ocean and Coastal Policy Center 25 UC Natural Reserve System 26 Analytical Laboratory 28 REEF/Outreach 29 Awards Administered 30 Awards 31 Research Summaries 39 Space 142 Statistical Summary 148 Research Support Summary 149 Statistical Summary 2013-2014 151 Five-Year Research Support Summary 153 Funding Agencies 156 MSI Advisory Committee, 158 Administrative and Technical Staff Principal Investigators 161 2 ANNUAL REPORT | 2013-2014 Director’s Statement 3 ANNUAL REPORT | 2013-2014 Director’s Statement This year marks the 10th anniversary of the opening of the Marine Science Institute’s Marine Science Research Building, a state-of-the-art facility located on the bluff overlooking the Pacific Ocean on the eastern edge of the University of California, Santa Barbara’s campus. It is an inspiring facility and location, and it has taken the hard work of many individuals to make it a reality. At UCSB in the 1980’s and 1990’s, Marine Science facilities could be described as dispersed, inadequate, and not up to the standards of a world class research institution. Long-standing efforts to get a facility approved and built had met with no success. However, things began to change with the identification of a State of California program that provided a financing mechanism for research facilities dedicated to long-term scientific activities. -
ANNUAL REPORT Marine Science Institute UC SANTA BARBARA Table of Contents
2018–2019 ANNUAL REPORT Marine Science Institute UC SANTA BARBARA Table of Contents 3 Mission Statement 4 From the Director Overview 5 Executive Summary 7 10 Organizational Charts Administrative Staff 11 Centers and Units 12 13 MSI Advisory Committee, Administrative & Technical Staff 16 Statistical Summary Research Support Summary 17 Statistical Summary 2018–2019 19 Five-Year Research Support 21 Summary Funding Agencies 22 24 Principal Investigators 30 Postdoctoral Researchers, Graduate and Undergraduate Students 33 Space 39 Other Projects & Activities Coastal Research Center 40 Marine Biotechnology Center 42 Ocean & Coastal Policy Center 52 Analytical Laboratory 54 Education and Outreach 55 56 Awards Administered Awards 57 Research Summaries 66 2 Mission Statement The Marine Science Institute at the University of California, Santa Barbara, is committed to fostering innovative and significant research, to promoting effective stewardship, and to sharing exciting discoveries of the world’s oceans. 3 From the Director 4 Overview The Marine Science Institute (MSI) provides an intellectual and physical environment at UCSB that fosters world-renowned marine research. The institute brings together marine researchers from across the UCSB campus and supports multi-investigator collaborative projects and individual research efforts. The scientific membership at MSI consists of both ladder faculty and professional researchers. In 2018-2019 MSI membership included 25 ladder faculty and 32 professional researchers with 228 additional participants distributed across postdoctoral scholars, graduate students and undergraduates. Beyond research, MSI’s Research Experience and Education Facility (REEF) educates UCSB students and the general public about MSI science. MSI is housed in the marine science research building (MSRB) on the UCSB campus. -
Evaluating Tradeoffs Among Ecosystem Services to Inform Marine Spatial Planning
Evaluating tradeoffs among ecosystem services to inform marine spatial planning Lester, S. E., Costello, C., Halpern, B. S., Gaines, S. D., White, C., & Barth, J. A. (2013). Evaluating tradeoffs among ecosystem services to inform marine spatial planning. Marine Policy, 38, 80-89. doi:10.1016/j.marpol.2012.05.022 10.1016/j.marpol.2012.05.022 Elsevier Accepted Manuscript http://cdss.library.oregonstate.edu/sa-termsofuse 1 Title: Evaluating tradeoffs among ecosystem services to inform marine spatial planning 2 3 Sarah E. Lestera, Christopher Costellob, Benjamin S. Halpernc, Steven D. Gainesd, Crow Whitee, 4 John A. Barthf 5 6 a Marine Science Institute and Bren School of Environmental Science & Management, 7 University of California, Santa Barbara, CA 93106-6150, USA. [email protected] 8 b Bren School of Environmental Science & Management, 4410 Bren Hall, University of 9 California, Santa Barbara, CA 93106, USA. [email protected] 10 c National Center for Ecological Analysis and Synthesis, 735 State Street, Suite 300, Santa 11 Barbara, CA 93101, USA. [email protected] 12 d Bren School of Environmental Science & Management, 4410 Bren Hall, University of 13 California, Santa Barbara, CA 93106, USA. [email protected] 14 e Bren School of Environmental Science & Management, 4410 Bren Hall, University of 15 California, Santa Barbara, CA 93106, USA. [email protected] 16 f College of Oceanic & Atmospheric Sciences, Oregon State University, 104 COAS Admin Bldg, 17 Corvallis, OR 97331, USA. [email protected] 18 19 Corresponding author: 20 Sarah E. Lester 21 Marine Science Institute / Bren School of Environmental Science & Management 22 University of California 23 Santa Barbara, CA 93106-6150, USA 24 Ph: 805.893.5175 25 Fax: 805.893.8062 26 Email: [email protected] 27 28 Running Title: Ecosystem service tradeoffs 1 Ecosystem service tradeoffs 1 Abstract 2 A central challenge for natural resource management is developing rigorous yet practical 3 approaches for balancing the costs and benefits of diverse human uses of ecosystems. -
Pigments, Elemental Composition and Stoichiometry of Particulate Matter
Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Biogeosciences Discuss., 11, 8259–8324, 2014 www.biogeosciences-discuss.net/11/8259/2014/ doi:10.5194/bgd-11-8259-2014 BGD © Author(s) 2014. CC Attribution 3.0 License. 11, 8259–8324, 2014 This discussion paper is/has been under review for the journal Biogeosciences (BG). Pigments, elemental Please refer to the corresponding final paper in BG if available. composition and stoichiometry of Pigments, elemental composition (C, N, P, particulate matter Si) and stoichiometry of particulate M. Lasbleiz et al. matter, in the naturally iron fertilized Title Page region of Kerguelen in the Southern Abstract Introduction Ocean Conclusions References Tables Figures M. Lasbleiz1, K. Leblanc1, S. Blain2, J. Ras3,4, V. Cornet-Barthaux1, S. Hélias Nunige1, and B. Quéguiner1 J I 1Aix-Marseille Université Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, 13288, Marseille, Cedex 09, France J I 2 Laboratoire d’Océanographie Microbienne (LOMIC), UMR7621, CNRS, Université Pierre et Back Close Marie Curie, 66650, Banyuls-sur-mer, France 3Laboratoire d’Océanographie de Villefranche, UMR7093, CNRS, 06230 Villefranche-sur-Mer, Full Screen / Esc France 4 Université Pierre et Marie Curie (Paris-6), Unité Mixte de Recherche 7093, Laboratoire Printer-friendly Version d’Océanographie de Villefranche-sur-Mer, 06230, Villefranche-sur-Mer, France Interactive Discussion 8259 Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Received: 20 May 2014 – Accepted: 20 May 2014 – Published: 5 June 2014 Correspondence to: M. Lasbleiz ([email protected]) BGD Published by Copernicus Publications on behalf of the European Geosciences Union. 11, 8259–8324, 2014 Pigments, elemental composition and stoichiometry of particulate matter M. -
Toxicological Profile for Silica
SILICA 208 CHAPTER 5. POTENTIAL FOR HUMAN EXPOSURE 5.1 OVERVIEW Silica has been identified in at least 37 of the 1,854 hazardous waste sites that have been proposed for inclusion on the EPA National Priorities List (NPL) (ATSDR 2017). However, the number of sites in which silica has been evaluated is not known. The number of sites in each state is shown in Figure 5-1. Figure 5-1. Number of NPL Sites with Silica Contamination Crystalline Silica • c-Silica is ubiquitous and widespread in the environment, primarily in the form of quartz. Other predominant forms include cristobalite and tridymite. • Sand, gravel, and quartz crystal are the predominant commercial product categories for c-silica. • c-Silica enters environmental media naturally through the weathering of rocks and minerals and anthropogenic releases of c-silica in the form of air emissions (e.g., industrial quarrying and mining, metallurgic manufacturing, power plant emissions) or use in water filtration (quartz sand). SILICA 209 5. POTENTIAL FOR HUMAN EXPOSURE • c-Silica undergoes atmospheric transport as a fractional component of particulate emissions, is virtually insoluble in water and generally settles into sediment, and remains unchanged in soil. • c-Silica is present in air and water; therefore, the general population will be exposed to c-silica by inhalation of ambient air and ingestion of water. • Inhalation exposure is the most important route of exposure to c-silica compounds due to the development of adverse effects from inhaled c-silica in occupational settings. • Individuals with potentially high exposures include workers with occupational exposure to c-silica, which occurs during the mining and processing of metals, nonmetals, and coal, and in many other industries. -
Spatio-Temporal Variability in Benthic Silica Cycling in Two Macrotidal Estuaries
Spatio-temporal variability in benthic silica cycling in two macrotidal estuaries: causes and consequences for local to global studies Mélanie Raimonet, Olivier Ragueneau, Françoise Andrieux-Loyer, Xavier Philippon, Roger Kérouel, Manon Le Goff, Laurent Mémery To cite this version: Mélanie Raimonet, Olivier Ragueneau, Françoise Andrieux-Loyer, Xavier Philippon, Roger Kérouel, et al.. Spatio-temporal variability in benthic silica cycling in two macrotidal estuaries: causes and consequences for local to global studies. Estuarine, Coastal and Shelf Science, Elsevier, 2013, 119, pp.31-43. 10.1016/j.ecss.2012.12.008. hal-00808527 HAL Id: hal-00808527 https://hal.archives-ouvertes.fr/hal-00808527 Submitted on 5 Apr 2013 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Spatio-temporal variability in benthic silica cycling in two macrotidal 2 estuaries: causes and consequences for local to global studies 3 4 Mélanie Raimoneta,*, Olivier Ragueneaua, Françoise Andrieux-Loyerb, Xavier Philipponb, Roger 5 Kerouelb, Manon Le Goffa, Laurent Mémerya 6 7 a Laboratoire des Sciences de l'Environnement Marin LEMAR-IUEM, UMR 6539 CNRS-UBO- 8 IRD-Ifremer, Plouzané, France b 9 DYNECO Pelagos, Ifremer, Plouzané, France * Corresponding author. -
Heavy Silicon Isotopic Composition of Silicic Acid and Biogenic Silica in Arctic Waters Over the Beaufort Shelf and the Canada Basin D
Heavy silicon isotopic composition of silicic acid and biogenic silica in Arctic waters over the Beaufort shelf and the Canada Basin D. Varela, M. Brzezinski, C. Beucher, J. Jones, K. Giesbrecht, B. Lansard, A. Mucci To cite this version: D. Varela, M. Brzezinski, C. Beucher, J. Jones, K. Giesbrecht, et al.. Heavy silicon isotopic com- position of silicic acid and biogenic silica in Arctic waters over the Beaufort shelf and the Canada Basin. Global Biogeochemical Cycles, American Geophysical Union, 2016, 30 (6), pp.804-824. 10.1002/2015GB005277. hal-02881295 HAL Id: hal-02881295 https://hal.archives-ouvertes.fr/hal-02881295 Submitted on 17 Sep 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. PUBLICATIONS Global Biogeochemical Cycles RESEARCH ARTICLE Heavy silicon isotopic composition of silicic acid 10.1002/2015GB005277 and biogenic silica in Arctic waters over Key Points: the Beaufort shelf and the Canada Basin • Deep Arctic silicic acid isotopic signals are the heaviest of all ocean basins D. E. Varela1,2, M. A. Brzezinski3,4, C. P. Beucher2,3, J. L. Jones3, K. E. Giesbrecht2, B. Lansard5,6, • Riverine inputs decrease the surface 5 Arctic silicic acid isotopic composition and A. -
Error Budget of Inverse Box Models: the North Atlantic
NOVEMBER 2003 GANACHAUD 1641 Error Budget of Inverse Box Models: The North Atlantic ALEXANDRE GANACHAUD Institut de Recherche pour le DeÂveloppement, Laboratoire d'Etudes Geophysiques et d'Oceanographie Spatiale±UMR5566/CNRS/CNES/ IRD/UPS, NoumeÂa, New Caledonia (Manuscript received 29 March 2002, in ®nal form 21 March 2003) ABSTRACT Linear inverse box models based on hydrographic data are widely used to estimate the ocean circulation and associated transports of heat and of other important quantities. The inverse method permits calculation of a circulation that is consistent with basic conservation laws such as those for mass or salt along with uncertainties. Both uncertainties and solution depend upon assumptions about noise and the limitations of linear models. Internal waves introduce noise into the measurements, while ocean variability sets bounds on the linear model skills when time average circulation is sought. Observations of internal wave spectra and sensitivity experiments on hydrographic data suggest estimates for measurement errors in transport calculations of 63Sv(1Sv8 106 m3 s21 . 109 kg s21) at midlatitudes, with dependence on latitude. The output of a realistic numerical ocean model is used to quantify the impact of ocean variability on one-time hydrographic sections. The implied error is of order 68 Sv in net mass balance and 6100 kmol s21 in net silica balance. (The estimates are a priori errors.) Net mass balance has often been assumed more accurate with errors in individual layers compensating. While this may be true instantaneously, it is shown here that such an assumption leads to incorrect estimation of the time mean transports and diapycnal transfers. -
Enriching the Health of Physics Education
Enriching the Health of Physics Education 2008 AAPT Winter Welcome to Baltimore .............. 3 Meeting Acknowledgments .................... 4 Meeting Information ................. 6 Baltimore, MD Contact Information ................. 6 Bus Schedule ............................ 7 About Baltimore ....................... 8 Special Events ......................... 10 January 19–23 Exhibitors ............................... 12 Baltimore Marriott Award Winners & Plenaries ..... 16 Committee Meetings .............. 23 Waterfront Hotel Meeting at a Glance ............... 24 Workshop Abstracts ................ 28 Commercial Workshops .......... 34 SUNDAY Poster Sessions ......... 38 MONDAY Sessions ................. .40 TUESDAY Sessions .................. 66 WEDNESDAY Sessions ............. 84 Index of Participants ................ 90 Index of Advertisers ................ 92 Donors .................................... 93 Maps ...................................... 94 Future Meetings ...................... 96 American Association of Physics Teachers One Physics Ellipse College Park, MD USA 20740-3845 301-209-3300, fax: 301-209-0845 [email protected], www.aapt.org InterActions Makes Its Official Debut at the 2008 Winter Meeting What Is InterActions? – The people, places, programs and policies defining physics teaching and learning – A glimpse Inside the physics education community openforum Synopsis iAmonitor QandA Focal Point ilearn Insight causeeffect endpoint Inside InterActions – human interest in physics Welcome to Baltimore Welcome to the -
Geochemical Signatures of Parent Materials and Lake Sediments in Northern Minnesota
Geochemical signatures of parent materials and lake sediments in northern Minnesota by EMILY MELLICANT B.S., University of Miami, 2013 A THESIS submitted in partial fulfillment of the requirements for the degree MASTER OF ARTS Department of Geography College of Arts and Sciences KANSAS STATE UNIVERSITY Manhattan, Kansas 2017 Approved by: Major Professor Kendra K. McLauchlan Copyright EMILY MELLICANT 2017 Abstract The importance of local parent material has been recognized as a fundamental control on the geochemistry of lake sediments, but there have been relatively few broad-scale surveys of catchment sources of terrigenous lake sediments. In this paper, I present a geochemical study of catchment parent materials and lake sediments from four lakes in Northern Minnesota. Similar climate and vegetation conditions are present at all four lakes, which vary mainly in catchment parent material and lake morphometry. Geochemical data including major, trace and rare earth elements (REEs) from catchment parent material samples was compared with lake sediment geochemical data using PCA, linear regression, geological indices and elemental ratios. In homogenous till-dominated catchments, patterns of elemental variation in the catchment till could be extended to predict elemental concentrations in the lake sediments. Simple ratios, which are commonly used to analyze lake sediment geochemical data, were not good predictors of lake sediment composition, however. Catchments with mixed bedrock and till were compositionally heterogeneous, and comparison with lake sediments was difficult. Lack of grain size control and biogenic silica measurements further confounded analysis. However, ΣREE/Y ratio was found to be diagnostic of the catchment parent materials and present within the lake sediments.