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Time Series Of Stable Isotopes In Dissolved Inorganic Carbon Of Surface Seawater Near Bermuda And Hawaii
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Book Synopsis Time-series of Stable Isotopes in Dissolved Inorganic Carbon of Surface Seawater Near Bermuda and Hawaii by : Mariela Ke'o-lani Brooks
Download or read book Time-series of Stable Isotopes in Dissolved Inorganic Carbon of Surface Seawater Near Bermuda and Hawaii written by Mariela Ke'o-lani Brooks and published by . This book was released on 2020 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 13C/12C ratio of stable carbon isotopes in dissolved inorganic carbon (DIC) can provide insight into carbon cycle variability and trends in the surface ocean. Measurements of [delta]13C-DIC when combined with DIC can be used to estimate anthropogenic carbon uptake and marine productivity and can contribute to our understanding of the role that the ocean plays in the global carbon cycle. This dissertation describes surface ocean time-series measurements near Bermuda (S-BATS) and Hawaii (HOT) of [delta]13C-DIC, DIC, and alkalinity (ALK) as a part of the Scripps Seawater Program, focusing on [delta]13C-DIC. Prior to this study, there was a hiatus in seawater [delta]13C-DIC measurements at Scripps, while samples continued to be collected and archived for future analysis. This dissertation details the resumption of these measurements along with the calibration and methodology used for Scripps measurements of [delta]13C-DIC. We quantify the calibration contributions to uncertainty in the context of consistency between newer and older measurements. In addition, we introduce and document the stability of three new seawater secondary standards, including a method based on CO2 in compressed N2 gas. In these time-series records of nearly three decades, we show that the long-term trends and seasonal cycles in sDIC and [delta]13C-DIC at both S-BATS and HOT are consistent with earlier studies and independent time-series records. From the full record we find no long-term changes in the seasonal cycle of sDIC, [delta]13C-DIC, or computed pCO2. Consistent to some earlier studies we find significant correlations at S-BATS with the North Atlantic Oscillation and at HOT with the Pacific Decadal Oscillation (PDO). We also find correlations at HOT that were not previously noted including the PDO with sea surface temperature and mixed layer depth (MLD), as well as El Nino Southern Oscillation (NINO3.4) with sDIC and MLD. Lastly, we use a combination of observations and CESM hindcast simulations to explore upper ocean carbon variability in subtropical gyres. This allows us to examine the time-series in a broader geographic context, showing coherent patterns of variability across the North Atlantic and North Pacific subtropical gyres and illustrating key differences in the controls of variability at BATS and HOT.
Book Synopsis Assessing the Evolution of Dissolved Inorganic Carbon and Stable Carbon Isotopes in Surface Waters by : Pride Tamasang Abongwa
Download or read book Assessing the Evolution of Dissolved Inorganic Carbon and Stable Carbon Isotopes in Surface Waters written by Pride Tamasang Abongwa and published by . This book was released on 2014 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicting Stable Isotope Signatures of Dissolved Inorganic Carbon in Lakes by : Darren Lee Bade
Download or read book Predicting Stable Isotope Signatures of Dissolved Inorganic Carbon in Lakes written by Darren Lee Bade and published by . This book was released on 2002 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Nitrogen and Organic Carbon Cycling in the Eastern Pacific Ocean Using Natural Abundance Isotopes by : Margot Elizabeth White
Download or read book Studies of Nitrogen and Organic Carbon Cycling in the Eastern Pacific Ocean Using Natural Abundance Isotopes written by Margot Elizabeth White and published by . This book was released on 2021 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis uses a variety of natural abundance isotope measurements to expand our understanding of nitrogen and organic carbon cycling within the ocean. Chapters 2 & 3 use stable isotopes of nitrate to investigate recent trends in nitrogen cycling in the southern California Current System (sCCS). In Chapter 2 we show that surface ocean warming during the 2015-2016 El Niño event led to reduced nitrate supply and increased reliance on recycled nitrate produced via euphotic zone nitrification. We also identified spatial and temporal variability in euphotic zone nitrate utilization associated with iron limitation of phytoplankton. Chapter 3 uses a time series of stable isotopes of nitrate along with other physical and chemical measurements to examine recent biogeochemical changes in a partially isolated marine basin off the coast of California, whose bottom waters become deoxygenated between annual flushing events. Our data confirm an unprecedented increase in water column denitrification in basin bottom waters in recent years that was likely caused by a long-term trend of decreasing oxygen concentrations outside the basin. Chapter 4 uses a variety of chemical and isotopic measurements to characterize organic matter across oxygen gradients in the eastern tropical North Pacific (ETNP). This work describes unique organic matter dynamics along the oxycline and shows that optical properties of dissolved organic matter effectively identify locations where intense oxic remineralization takes place, whereas most other bulk measurements of organic matter do not provide insight into unique processes within these environments. We also document the impact of a passing hurricane on water column properties. Chapter 5 uses thermal oxidation in conjunction with a chemical processing method to show that the current paradigm of marine DOC cycling needs revision. Our results show that even the most 14C-depleted DOC fraction exhibits a vertical radiocarbon gradient, suggesting the addition and removal of DOC from this reservoir on shorter timescales than current models predict. We propose a new hypothesis for marine DOC cycling that would revise the water column lifetime of marine DOC to only 2,300 years, approximately doubling the estimated flux of carbon through the deep ocean.
Book Synopsis Oxygen and Carbon in the Oceans and Atmosphere: Stable Isotopes as Tracers for Consumption, Production, and Circulation Models by : Peter Michael Kroopnick
Download or read book Oxygen and Carbon in the Oceans and Atmosphere: Stable Isotopes as Tracers for Consumption, Production, and Circulation Models written by Peter Michael Kroopnick and published by . This book was released on 1971 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seqestration of Dissolved Organic Carbon in the Deep Sea by :
Download or read book Seqestration of Dissolved Organic Carbon in the Deep Sea written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Carbon Isotopes in Deep Sea Pore Waters by : Daniel Charles McCorkle
Download or read book Stable Carbon Isotopes in Deep Sea Pore Waters written by Daniel Charles McCorkle and published by . This book was released on 1987 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Biological and Physical Controls on the Stable Isotope and Trace Metal Content of Biogenic and Inorganic Calcium Carbonate by : Robert Thomas Klein
Download or read book A Study of Biological and Physical Controls on the Stable Isotope and Trace Metal Content of Biogenic and Inorganic Calcium Carbonate written by Robert Thomas Klein and published by . This book was released on 1996 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interpretations of Biogeochemical Processes from the US JGOFS Bermuda and Hawaii Time-series Sites by :
Download or read book Interpretations of Biogeochemical Processes from the US JGOFS Bermuda and Hawaii Time-series Sites written by and published by . This book was released on 2001 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Marine Iodine Cycle, Past, Present and Future by : Rosie Chance
Download or read book The Marine Iodine Cycle, Past, Present and Future written by Rosie Chance and published by Frontiers Media SA. This book was released on 2024-05-17 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marine iodine cycle has remained enigmatic despite decades of research. As a redox active element that is accumulated by many marine organisms, it exists in multiple oxidation states and phases in the oceans. Abiotic, photochemical and biological processes occurring at the ocean surface, at depth, and at the sediment-water interface all drive transformations between iodine species. A recent resurgence in interest in marine iodine speciation has been driven by its importance in a diverse range of fields, from atmospheric chemistry to paleoceanography.
Book Synopsis Stable Isotope Ratios of Dissolved Inorganic Carbon in the Atlantic by : Werner G. Deuser
Download or read book Stable Isotope Ratios of Dissolved Inorganic Carbon in the Atlantic written by Werner G. Deuser and published by . This book was released on 1969 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report for the Bermuda Biological Station for Research, Inc by : Bermuda Biological Station for Research
Download or read book Annual Report for the Bermuda Biological Station for Research, Inc written by Bermuda Biological Station for Research and published by . This book was released on 2000 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Stable Isotopic Composition of Dissolved Inorganic Carbon (Delta13CDIC) and Anthropogenic CO2 in the Sub-Polar North Atlantic by : Florence Mahalia Greatrix
Download or read book The Stable Isotopic Composition of Dissolved Inorganic Carbon (Delta13CDIC) and Anthropogenic CO2 in the Sub-Polar North Atlantic written by Florence Mahalia Greatrix and published by . This book was released on 2015 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Flux in the Ocean by : Venugopalan Ittekkot
Download or read book Particle Flux in the Ocean written by Venugopalan Ittekkot and published by . This book was released on 1996-08-22 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle flux in the ocean is a major segment linking terrestrial, meteorological and surface ocean processes with those operating in the deep sea. This book describes how wind speeds and dust fallout over the oceans, volcanic eruptions and freshwater and suspended matter inputs from rivers influence material flux to the ocean's interior and its variability. It explores the potential use of deep ocean particle flux studies to record and monitor climatic and environmental changes.
Book Synopsis Determining the stable isotope ratio of total dissolved inorganic carbon in lake water by GC/C/IRMS by : T. MIYAJIMA
Download or read book Determining the stable isotope ratio of total dissolved inorganic carbon in lake water by GC/C/IRMS written by T. MIYAJIMA and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Isotopic Tracers in Surface Water by : M. Lee Davisson
Download or read book Isotopic Tracers in Surface Water written by M. Lee Davisson and published by American Water Works Association. This book was released on 2002 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotopes in Oceanographic Studies and Paleotemperatures by : Ezio Tongiorgi
Download or read book Stable Isotopes in Oceanographic Studies and Paleotemperatures written by Ezio Tongiorgi and published by . This book was released on 1970 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
