Matches in SemOpenAlex for { <https://semopenalex.org/work/W2049854485> ?p ?o ?g. }
- W2049854485 endingPage "137" @default.
- W2049854485 startingPage "124" @default.
- W2049854485 abstract "Abstract The Amazon River Plume delivers freshwater and nutrients to an otherwise oligotrophic western tropical North Atlantic (WTNA) Ocean. Plume waters create conditions favorable for carbon and nitrogen fixation, and blooms of diatoms and their diazotrophic cyanobacterial symbionts have been credited with significant CO 2 uptake from the atmosphere. The fate of the carbon, however, has been measured previously by just a few moored or drifting sediment traps, allowing only speculation about the full extent of the plume's impact on carbon flux to the deep sea. Here, we used surface (0.5 m) sediment cores collected throughout the Demerara Slope and Abyssal Plain, at depths ranging from 1800 to 5000 m, to document benthic diagenetic processes indicative of carbon flux. Pore waters were extracted from sediments using both mm- and cm-scale extraction techniques. Profiles of nitrate (NO 3 ) and silicate (Si(OH) 4 ) were modeled with a diffusion-reaction equation to determine particulate organic carbon (POC) degradation and biogenic silica (bSi) remineralization rates. Model output was used to determine the spatial patterns of POC and bSi arrival at the sea floor. Our estimates of POC and Si remineralization fluxes ranged from 0.16 to 1.92 and 0.14 to 1.35 mmol m −2 d −1 , respectively. A distinct axis of POC and bSi deposition on the deep sea floor aligned with the NW axis of the plume during peak springtime flood. POC flux showed a gradient along this axis with highest fluxes closest to the river mouth. bSi had a more diffuse zone of deposition and remineralization. The impact of the Amazon plume on benthic fluxes can be detected northward to 10°N and eastward to 47°W, indicating a footprint of nearly 1 million km 2 . We estimate that 0.15 Tmol C y −1 is remineralized in abyssal sediments underlying waters influenced by the Amazon River. This constitutes a relatively high fraction (~7%) of the estimated C export from the region.; the plume thus has a demonstrable impact on C org export in the western Atlantic. Benthic fluxes under the plume were comparable to and in some cases greater than those observed in the eastern equatorial Atlantic, the southeastern Atlantic, and the Southern Ocean." @default.
- W2049854485 created "2016-06-24" @default.
- W2049854485 creator A5013759813 @default.
- W2049854485 creator A5022211005 @default.
- W2049854485 creator A5023442531 @default.
- W2049854485 creator A5054154582 @default.
- W2049854485 creator A5061587270 @default.
- W2049854485 creator A5067312975 @default.
- W2049854485 date "2014-03-01" @default.
- W2049854485 modified "2023-10-14" @default.
- W2049854485 title "Carbon and biogenic silica export influenced by the Amazon River Plume: Patterns of remineralization in deep-sea sediments" @default.
- W2049854485 cites W1484193312 @default.
- W2049854485 cites W1552344283 @default.
- W2049854485 cites W1567807640 @default.
- W2049854485 cites W1859438061 @default.
- W2049854485 cites W1863582565 @default.
- W2049854485 cites W1965468773 @default.
- W2049854485 cites W1966779716 @default.
- W2049854485 cites W1969184914 @default.
- W2049854485 cites W1986029367 @default.
- W2049854485 cites W1986081344 @default.
- W2049854485 cites W1989178980 @default.
- W2049854485 cites W1997153540 @default.
- W2049854485 cites W2003167051 @default.
- W2049854485 cites W2003250512 @default.
- W2049854485 cites W2006682379 @default.
- W2049854485 cites W2007919618 @default.
- W2049854485 cites W2013278565 @default.
- W2049854485 cites W2017259284 @default.
- W2049854485 cites W2021947786 @default.
- W2049854485 cites W2024417244 @default.
- W2049854485 cites W2027433779 @default.
- W2049854485 cites W2031714936 @default.
- W2049854485 cites W2032657576 @default.
- W2049854485 cites W2032806381 @default.
- W2049854485 cites W2036286430 @default.
- W2049854485 cites W2038281478 @default.
- W2049854485 cites W2038799028 @default.
- W2049854485 cites W2040140061 @default.
- W2049854485 cites W2041027163 @default.
- W2049854485 cites W2043668123 @default.
- W2049854485 cites W2049706484 @default.
- W2049854485 cites W2049757027 @default.
- W2049854485 cites W2052259517 @default.
- W2049854485 cites W2052996965 @default.
- W2049854485 cites W2058371571 @default.
- W2049854485 cites W2060026462 @default.
- W2049854485 cites W2063656463 @default.
- W2049854485 cites W2064573290 @default.
- W2049854485 cites W2067319201 @default.
- W2049854485 cites W2068677866 @default.
- W2049854485 cites W2070292413 @default.
- W2049854485 cites W2075184363 @default.
- W2049854485 cites W2076132895 @default.
- W2049854485 cites W2078114051 @default.
- W2049854485 cites W2078956978 @default.
- W2049854485 cites W2079557634 @default.
- W2049854485 cites W2080212280 @default.
- W2049854485 cites W2086328258 @default.
- W2049854485 cites W2087096994 @default.
- W2049854485 cites W2089787452 @default.
- W2049854485 cites W2091771900 @default.
- W2049854485 cites W2092650955 @default.
- W2049854485 cites W2093465808 @default.
- W2049854485 cites W2094931011 @default.
- W2049854485 cites W2094957771 @default.
- W2049854485 cites W2110270998 @default.
- W2049854485 cites W2112823340 @default.
- W2049854485 cites W2115216132 @default.
- W2049854485 cites W2116466461 @default.
- W2049854485 cites W2123405241 @default.
- W2049854485 cites W2127191147 @default.
- W2049854485 cites W2136508470 @default.
- W2049854485 cites W2152907518 @default.
- W2049854485 cites W2154281565 @default.
- W2049854485 cites W2159429138 @default.
- W2049854485 cites W2161956009 @default.
- W2049854485 cites W2163692773 @default.
- W2049854485 cites W2163836477 @default.
- W2049854485 cites W2166993701 @default.
- W2049854485 cites W2172259154 @default.
- W2049854485 cites W2327718822 @default.
- W2049854485 doi "https://doi.org/10.1016/j.dsr.2013.12.007" @default.
- W2049854485 hasPublicationYear "2014" @default.
- W2049854485 type Work @default.
- W2049854485 sameAs 2049854485 @default.
- W2049854485 citedByCount "19" @default.
- W2049854485 countsByYear W20498544852014 @default.
- W2049854485 countsByYear W20498544852015 @default.
- W2049854485 countsByYear W20498544852016 @default.
- W2049854485 countsByYear W20498544852017 @default.
- W2049854485 countsByYear W20498544852018 @default.
- W2049854485 countsByYear W20498544852019 @default.
- W2049854485 countsByYear W20498544852020 @default.
- W2049854485 countsByYear W20498544852021 @default.
- W2049854485 countsByYear W20498544852023 @default.
- W2049854485 crossrefType "journal-article" @default.
- W2049854485 hasAuthorship W2049854485A5013759813 @default.