FN Archimer Export Format
PT J
TI Enhanced supply of fossil organic carbon to the Okinawa Trough since the last deglaciation
BT 
AF KAO, S. J.
   DAI, M. H.
   WEI, K. Y.
   BLAIR, N. E.
   LYONS, W. B.
AS 1:3;2:4;3:5;4:1,2;5:6;
FF 1:;2:;3:;4:;5:;
C1 Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA.
   Northwestern Univ, Dept Earth & Planetary Sci, Evanston, IL 60208 USA.
   Acad Sinica, Res Ctr Environm Changes, Taipei 11529, Taiwan.
   Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China.
   Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan.
   Ohio State Univ, Byrd Polar Res Ctr, Columbus, OH 43210 USA.
C2 UNIV NORTHWESTERN, USA
   UNIV NORTHWESTERN, USA
   ACAD SINICA, TAIWAN
   UNIV XIAMEN, CHINA
   UNIV NATL TAIWAN, TAIWAN
   UNIV OHIO STATE, USA
IF 3.626
TC 40
UR https://archimer.ifremer.fr/doc/00237/34845/33264.pdf
   https://archimer.ifremer.fr/doc/00237/34845/33265.pdf
LA English
DT Article
CR MD 122 / WEPAMA
BO Marion Dufresne
AB Significantly older C-14 ages by 2500-7900 years are found for sedimentary total organic carbon (TOC) when compared to ages of codeposited surface-dwelling foraminifera in the southern Okinawa Trough. This age discrepancy increases with rising sea level since the Last Glacial Maximum. A progressive shift in TOC delta C-13 toward more negative values with rising sea level reflects an increasing fractional contribution of terrestrial organics (soil organics, plant debris, and/or fossil organics) to the buried organic pool. Organic matter previously stored on the East China Sea shelf during sea level lowstand and riverine material from Taiwan may be the sources that cause the delta C-13(TOC) to shift to more terrestrial values. During the Holocene when sea level is above -40 m, delta C-13(TOC) values stabilize within a narrow range (-22.3 to -22.8 parts per thousand) while age discrepancies continue to increase and less chemically weathered sediments are deposited. The increase in age discrepancy between TOC and foraminifera in the Holocene may be due to a wetter climate that drove higher rates of physical weathering on Taiwan and greater transport rates of fossil organic C-bearing lithogenic sediment to the ocean. The climate impact on the relative delivery of fossil and nonfossil TOC in depositional settings influenced by fluvial sources should be considered in interpretations of sedimentary C isotope records.
PY 2008
PD MAY
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 23
IS 2 / PA2207
UT 000255830800001
BP 1
EP 10
DI 10.1029/2007PA001440
ID 34845
ER

EF