Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region

Christian J. Sanders, Pedro P. Caldeira, Joseph M. Smoak, Michael E Ketterer, Andre Belem, Ursula M N Mendoza, Lívia G M S Cordeiro, Emmanoel V. Silva-Filho, Sambasiva R. Patchineelam, Ana Luiza S Albuquerque

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Six sediment cores were obtained from the Cabo Frio shelf region of coastal Brazil to quantify the accumulation of organic carbon in a highly productive upwelling region. The sampled locations, 10-60km offshore at ~100m water depth, were investigated for excess 210Pb (210Pbex) as well as 239+240Pu fallout activities to determine sedimentary dynamics. The 210Pbex and 239+240Pu dating models show that the sediment accumulation rates varied substantially throughout this complex hydrodynamic system (0.8-5.5mmyr-1). Excess 210Pb and 239+240Pu fluxes indicate lateral transport, with varying intensity along the continental shelf. The stations with the greatest 210Pbex and 239+240Pu sediment inventories are also the sites with the highest carbon accumulation rates (CAR). The total organic carbon (TOC) and total nitrogen (TN) contents, along with the δ13C results, indicate that the organic matter deposited in this region is mainly of marine origin. The results of this work suggest that lateral transport, with varying intensity along the shelf, contribute to the large quantities of marine plankton buried at specific depositional settings in the Cabo Frio upwelling region (~1-8mol of OCcm-2yr-1).

Original languageEnglish (US)
Pages (from-to)68-75
Number of pages8
JournalContinental Shelf Research
Volume75
DOIs
StatePublished - Mar 1 2014

Fingerprint

upwelling
organic carbon
sediments
Brazil
carbon
accumulation rate
hydrodynamics
nitrogen content
plankton
fallout
organic matter
sediment
total organic carbon
sediment core
continental shelf
water depth
nitrogen
water

Keywords

  • δC
  • Pb and Pu geochronology
  • Lateral transport
  • Organic sediments
  • Sedimentation
  • TOC/TN molar ratio

ASJC Scopus subject areas

  • Aquatic Science
  • Geology
  • Oceanography

Cite this

Sanders, C. J., Caldeira, P. P., Smoak, J. M., Ketterer, M. E., Belem, A., Mendoza, U. M. N., ... Albuquerque, A. L. S. (2014). Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region. Continental Shelf Research, 75, 68-75. https://doi.org/10.1016/j.csr.2013.10.009

Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region. / Sanders, Christian J.; Caldeira, Pedro P.; Smoak, Joseph M.; Ketterer, Michael E; Belem, Andre; Mendoza, Ursula M N; Cordeiro, Lívia G M S; Silva-Filho, Emmanoel V.; Patchineelam, Sambasiva R.; Albuquerque, Ana Luiza S.

In: Continental Shelf Research, Vol. 75, 01.03.2014, p. 68-75.

Research output: Contribution to journalArticle

Sanders, CJ, Caldeira, PP, Smoak, JM, Ketterer, ME, Belem, A, Mendoza, UMN, Cordeiro, LGMS, Silva-Filho, EV, Patchineelam, SR & Albuquerque, ALS 2014, 'Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region', Continental Shelf Research, vol. 75, pp. 68-75. https://doi.org/10.1016/j.csr.2013.10.009
Sanders, Christian J. ; Caldeira, Pedro P. ; Smoak, Joseph M. ; Ketterer, Michael E ; Belem, Andre ; Mendoza, Ursula M N ; Cordeiro, Lívia G M S ; Silva-Filho, Emmanoel V. ; Patchineelam, Sambasiva R. ; Albuquerque, Ana Luiza S. / Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region. In: Continental Shelf Research. 2014 ; Vol. 75. pp. 68-75.
@article{f2852e7833e54fb0b8f86b3c181eeb92,
title = "Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region",
abstract = "Six sediment cores were obtained from the Cabo Frio shelf region of coastal Brazil to quantify the accumulation of organic carbon in a highly productive upwelling region. The sampled locations, 10-60km offshore at ~100m water depth, were investigated for excess 210Pb (210Pbex) as well as 239+240Pu fallout activities to determine sedimentary dynamics. The 210Pbex and 239+240Pu dating models show that the sediment accumulation rates varied substantially throughout this complex hydrodynamic system (0.8-5.5mmyr-1). Excess 210Pb and 239+240Pu fluxes indicate lateral transport, with varying intensity along the continental shelf. The stations with the greatest 210Pbex and 239+240Pu sediment inventories are also the sites with the highest carbon accumulation rates (CAR). The total organic carbon (TOC) and total nitrogen (TN) contents, along with the δ13C results, indicate that the organic matter deposited in this region is mainly of marine origin. The results of this work suggest that lateral transport, with varying intensity along the shelf, contribute to the large quantities of marine plankton buried at specific depositional settings in the Cabo Frio upwelling region (~1-8mol of OCcm-2yr-1).",
keywords = "δC, Pb and Pu geochronology, Lateral transport, Organic sediments, Sedimentation, TOC/TN molar ratio",
author = "Sanders, {Christian J.} and Caldeira, {Pedro P.} and Smoak, {Joseph M.} and Ketterer, {Michael E} and Andre Belem and Mendoza, {Ursula M N} and Cordeiro, {L{\'i}via G M S} and Silva-Filho, {Emmanoel V.} and Patchineelam, {Sambasiva R.} and Albuquerque, {Ana Luiza S}",
year = "2014",
month = "3",
day = "1",
doi = "10.1016/j.csr.2013.10.009",
language = "English (US)",
volume = "75",
pages = "68--75",
journal = "Continental Shelf Research",
issn = "0278-4343",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Recent organic carbon accumulation (~100 years) along the Cabo Frio, Brazil upwelling region

AU - Sanders, Christian J.

AU - Caldeira, Pedro P.

AU - Smoak, Joseph M.

AU - Ketterer, Michael E

AU - Belem, Andre

AU - Mendoza, Ursula M N

AU - Cordeiro, Lívia G M S

AU - Silva-Filho, Emmanoel V.

AU - Patchineelam, Sambasiva R.

AU - Albuquerque, Ana Luiza S

PY - 2014/3/1

Y1 - 2014/3/1

N2 - Six sediment cores were obtained from the Cabo Frio shelf region of coastal Brazil to quantify the accumulation of organic carbon in a highly productive upwelling region. The sampled locations, 10-60km offshore at ~100m water depth, were investigated for excess 210Pb (210Pbex) as well as 239+240Pu fallout activities to determine sedimentary dynamics. The 210Pbex and 239+240Pu dating models show that the sediment accumulation rates varied substantially throughout this complex hydrodynamic system (0.8-5.5mmyr-1). Excess 210Pb and 239+240Pu fluxes indicate lateral transport, with varying intensity along the continental shelf. The stations with the greatest 210Pbex and 239+240Pu sediment inventories are also the sites with the highest carbon accumulation rates (CAR). The total organic carbon (TOC) and total nitrogen (TN) contents, along with the δ13C results, indicate that the organic matter deposited in this region is mainly of marine origin. The results of this work suggest that lateral transport, with varying intensity along the shelf, contribute to the large quantities of marine plankton buried at specific depositional settings in the Cabo Frio upwelling region (~1-8mol of OCcm-2yr-1).

AB - Six sediment cores were obtained from the Cabo Frio shelf region of coastal Brazil to quantify the accumulation of organic carbon in a highly productive upwelling region. The sampled locations, 10-60km offshore at ~100m water depth, were investigated for excess 210Pb (210Pbex) as well as 239+240Pu fallout activities to determine sedimentary dynamics. The 210Pbex and 239+240Pu dating models show that the sediment accumulation rates varied substantially throughout this complex hydrodynamic system (0.8-5.5mmyr-1). Excess 210Pb and 239+240Pu fluxes indicate lateral transport, with varying intensity along the continental shelf. The stations with the greatest 210Pbex and 239+240Pu sediment inventories are also the sites with the highest carbon accumulation rates (CAR). The total organic carbon (TOC) and total nitrogen (TN) contents, along with the δ13C results, indicate that the organic matter deposited in this region is mainly of marine origin. The results of this work suggest that lateral transport, with varying intensity along the shelf, contribute to the large quantities of marine plankton buried at specific depositional settings in the Cabo Frio upwelling region (~1-8mol of OCcm-2yr-1).

KW - δC

KW - Pb and Pu geochronology

KW - Lateral transport

KW - Organic sediments

KW - Sedimentation

KW - TOC/TN molar ratio

UR - http://www.scopus.com/inward/record.url?scp=84895072990&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84895072990&partnerID=8YFLogxK

U2 - 10.1016/j.csr.2013.10.009

DO - 10.1016/j.csr.2013.10.009

M3 - Article

AN - SCOPUS:84895072990

VL - 75

SP - 68

EP - 75

JO - Continental Shelf Research

JF - Continental Shelf Research

SN - 0278-4343

ER -