Download or read book COMPOSITION AND DISTRIBUTION OF ORGANIC CARBON IN THE INDIAN OCEAN Soderzhanie i Raspredelenie Organicheskogo Ugleroda V Vodakh Indiiskogo Okeana written by N. D. Starikova and published by . This book was released on 1969 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data on dissolved organic matter in the Indian Ocean are discussed. The surface water content of organic carbon is determined. The distribution of dissolved organic carbon in the surface water is related to the distribution of plankton. The dissolved organic matter shows a general decrease from surface to bottom. The pattern of the vertical distribution of dissolved organic matter in the Indian Ocean is related to that of the Pacific and Atlantic Oceans. (Author).

Download or read book Fauna of the Kurile Kamchatka Trench and Its Environment written by Veniamin Grigorʹevich Bogorov and published by . This book was released on 1972 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1969 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research and Development Reports written by and published by . This book was released on 1969-10 with total page 1340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1969-11 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1969 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1969 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Distribution of Dissolved and Particulate Organic Carbon in the Southeastern Indian Ocean written by Hussein Anwar Abd El-Reheim and published by . This book was released on 1976 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Organic Carbon Cycle in the Arctic Ocean written by Rüdiger Stein and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flux, preservation, and accumulation of organic carbon in marine systems are controlled by various mechanisms including primary p- duction of the surface water, supply of terrigenous organic matter from the surrounding continents, biogeochemical processes in the water column and at the seafloor, and sedimentation rate. For the world's oceans, phytoplankton productivity is by far the largest organic carbon 9 source, estimated to be about 30 to 50 Gt (10 tonnes) per year (Berger et al. 1989; Hedges and Keil 1995). By comparison, rivers contribute -1 about 0. 15 to 0. 23 Gt y of particulate organi.

Download or read book Distribution Composition Flux and Variability of Organic Carbon in Fram Strait Yermack Plateau Arctic Ocean and palaeo Environmental Significance written by Daniel Birgel and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution Composition Flux and Variability of Organic Carbon in Fram Strait Yermark Plateau Arctic Ocean and palaeo Environmental Significance written by Daniel Birgel and published by . This book was released on 2003 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution Composition Flux and Variability of Organic Carbon in Fram Strait Yermak Plateau Arctic Ocean and palaeo Environmental Significance written by Daniel Birgel and published by . This book was released on 2003 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Supply Use And Distribution of Organic Carbon In the Sea of Marmara written by Sevcan Çolpan Polat and published by . This book was released on 1989 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bottom Relief and Sediments of the Southern Part of Indian Ocean Rel efdna i Osadki Yuzhnoi Chasti Indiiskogo Okeana Translated from Russian written by A.P.. Lizitsyn and published by . This book was released on 19?? with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Conserved Behavior of Dissolved Organic Carbon in the Deep Ocean written by Sarah K Bercovici and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The global ocean contains a massive reservoir (662±32 Pg C) of dissolved organic carbon (DOC), and its dynamics, particularly in the deepest zones, are only slowly being understood. DOC in the deep ocean is ubiquitously low in concentration (~35 to 48 [mu]mol kg-1) and aged (4000 to 6000 years), persisting for multiple meridional overturning circulation cycles. Deep waters relatively enriched in DOC form in the North Atlantic. They migrate to the Southern Ocean (SO) to mix with waters from Antarctic shelves and the deep Pacific and Indian Oceans, in turn forming the voluminous circumpolar waters. The latter ultimately feed back into the Atlantic, Pacific, and Indian basins as bottom and intermediate waters. The goal of this dissertation is to assess evidence for local versus remote processes in influencing the distribution of DOC in the deep ocean. We use both large-scale datasets and isotopic and molecular composition data to understand the dynamics of the DOC pool on a global scale, though with an emphasis on the southern hemisphere. Chapter 2 focuses on DOC in Antarctic shelf systems and Antarctic Bottom Water (AABW) formation; Chapter 3 looks at the mostly conservative behavior of DOC in the deep SO; Chapter 4 considers the radiocarbon content of DOC in the South Indian Ocean (SIO) to assess the age of DOC; and Chapter 5 looks at the radiocarbon and molecular composition of DOC in the far North Pacific. In Chapter 6, findings are summarized. One potential local source of DOC to the deep SO is export from Antarctic shelf systems. Antarctica's continental shelves generate the densest waters in the world ocean and are responsible for the formation of AABW. AABW has the potential to sequester carbon in the deep ocean for millennia. DOC enrichment in dense shelf waters (DSW) in the Ross Sea was quantified and the potential for DOC to be sequestered into AABW was assessed. Ross Sea DSW was enriched in DOC by ~7 [mu]mol kg-1 relative to the incoming source waters (initial conditions), primarily due to deep vertical mixing of DOC-enriched surface waters. The total DOC excess in DSW suggests that 4.0±0.6 Tg DOC y-1 is exported off the shelf. However, this exported fraction does not appear to persist in newly formed AABW and is likely remineralized, sequestering this carbon as TCO2 in the deep ocean. A test of the conservative behavior of DOC in the Southern Ocean was assessed by considering its transport within deep water masses (North Atlantic Deep Water (NADW), Indian Deep Water (IDW), and Pacific Deep Water (PDW)). Multiple approaches (multiple linear regression, mass transport, and mass balance calculations) were used with data from CLIVAR Repeat Hydrography sections to evaluate the system. DOC concentrations in the deep SO and CDW largely reflect the linear mixing of those several deep waters entering the system from the north. Mass balance suggests too that the relatively depleted DOC radiocarbon content in the deep SO is a conserved property, but limited radiocarbon profiles in the SIO prevent a full analysis of the conserved behavior of 14C age of DOC. Consequently, to further test for the conservative behavior of the 14C age of DOC in the SO, the 14C age of DOC in the SIO was assessed; these data complete a survey of ages in the major deep water masses entrained into the SO. Four profiles of the 14C content of DOC spanning the SIO were collected, ranging from the Polar Front (56oS) to the subtropics (29oS). Surface waters had bulk radiocarbon ages of ~4400 years at the Polar Front and ~2000 14C years in the subtropics. At depth, mean radiocarbon age of DOC in CDW was 5302±160 14C years, while that in IDW was significantly older at 5557±81 14C years. A high-salinity remnant of NADW intruding into the deep SIO had a distinctly younger radiocarbon age for DOC (~5100 14C years). Multiple linear regression of 14C ages was used to assess the transport of DOC in the SIO. These results additionally confirm the conservative behavior of DOC in the deep Southern Ocean. To assess how the conserved behavior of DOC can be related to the molecular composition of dissolved organic matter (DOM), the 14C age of DOC was coupled with DOM composition in PDW in the far deep North Pacific (FNP), where the ocean's oldest water masses are located. DOM in this region has an old radiocarbon age (~6400 years old) and an overall molecular composition comprised of intrinsically stable compounds with low reactivities. By correlating radiocarbon age with each molecular formulae in solid-phase extracted DOM, the majority of DOM in PDW was found to have low reactivity and slow removal rates, especially in comparison with the DOM composition from the deep North Atlantic. Overall, this dissertation uses large-scale biogeochemical distributions as well as isotopic and molecular composition techniques to show that DOC cycling in the deep SO and SIO are due to mixing. As Antarctic shelf systems do not export DOC to the deep SO, instead DOC distributions and 14C age of DOC in the SO are largely controlled by mixing of NADW, IDW, and PDW. In addition, the SIO exhibits 14C ages of DOC consistent with water mass transports into that basin. Finally, the degraded molecular characteristic and old age of PDW in the FNP suggests that DOM in that region is low in reactivity and has not been renewed for long timescales.

Download or read book Lateral Advection of Organic Matter in the Eastern Indian Ocean and Its Role in Supporting New Production written by Opeyemi Kehinde and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eastern Indian Ocean is dynamic and rich in mesoscale eddy activity, and this complex circulation has implications for biological properties. The Argo Basin, south of Java and northwest of Australia, is located in the tropical eastern Indian Ocean and is considered an oligotrophic region (id est, low in chlorophyll and nutrient concentrations). Despite this, it is the only known spawning region for Southern bluefin Tuna. Generally, oligotrophic regions are nitrogen limited. However, the processes that supply nitrogen to the Argo Basin are not known. Here we investigated how much particulate organic matter (POM) is laterally advected and the role of this advected organic matter in supplying new nitrogen to the mixed layer of the Argo Basin using 14 years (2003 -2016) of remotely sensed data. Our results show that the average net primary productivity of phytoplankton in this offshore oligotrophic region is 98.5 Gg C d-1 and that lateral advection of particulate organic carbon (POC) transports 1.21 Gg C d-1 into the region. If we assume that the Argo Basin has an f-ratio (ratio of new production / net primary production) that is typical of oligotrophic regions (id est, 10%) we find that lateral advection of organic matter supplies an annual average of 12% of the nitrogen supporting the ecosystem (assuming that bulk particulate matter has a similar C:N ratio to phytoplankton). This suggests that lateral advection is a quantitatively important but not dominant source of nitrogen supporting the phytoplankton at the base of the food chain. This region has its highest productivity during the austral winter (June to August) which may be due to the Southwest monsoon causing substantial mesoscale activity. Furthermore, we found that 65% of lateral advection of POC into the region is driven by mesoscale eddies and organic matter primarily enters our study region through the eastern boundary of our domainches Our results may help to inform predictions and models to simulate the responses of oligotrophic systems to future change.

Download or read book The Distribution of Organic Carbon in Sediments of the Bering Sea written by Aleksandr Petrovich Lisit︠s︡yn and published by . This book was released on 1957 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: