FN Archimer Export Format
PT J
TI Organic Carbon Origin, Benthic Faunal Consumption, and Burial in Sediments of Northern Atlantic and Arctic Fjords (60–81°N)
BT 
AF Włodarska‐Kowalczuk, Maria
   Mazurkiewicz, Mikołaj
   Górska, Barbara
   Michel, Loic
   Jankowska, Emilia
   Zaborska, Agata
AS 1:1;2:1;3:1;4:2;5:1;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Institute of Oceanology Polish Academy of Science Sopot , Poland
   Laboratory of Oceanology, Freshwater and Oceanic Sciences Unit of reSearch (FOCUS), University of Liège Liège , Belgium,
C2 POLISH ACAD SCI, POLAND
   UNIV LIEGE, BELGIUM
IF 3.406
TC 32
UR https://archimer.ifremer.fr/doc/00591/70318/68353.pdf
   https://archimer.ifremer.fr/doc/00591/70318/68354.pdf
LA English
DT Article
DE ;s;organic matter preservation;organic carbon sequestration;benthic carbon mineralization;sedimentary processes;early diagenesis;marine geochemistry
AB Fjords have been recently recognized as hotspots of organic carbon (Corg) sequestration in marine sediments. This study aims to identify regional and local drivers of variability of Corg burial in north Atlantic and Arctic fjords. We provide a comparative quantification of Corg, δ13C, photosynthetic pigments content, benthic biomass, consumption, Corg accumulation and burial rates in sediments in six fjords (60 to 810N). Higher sediment Corg content in southern Norway reflected longer phytoplankton growth season and higher productivity. Higher contributions of terrestrial Corg were noted in temperate/southern Norway (dense land vegetation and high precipitation) and Arctic/Svalbard (glacial erosion) than in subarctic/northern Norway locations. Benthic biomass and carbon consumption were best correlated to δ13C and photosynthetic pigments content indicating control by quality rather than quantity of available food. Benthic faunal consumption did not seem to affect the variability in Corg burial. Regional environmental factors (water temperature, latitude) combined with local factors (Corg, grain size, pigment concentration) explained 94 % of Corg burial variability. Based on the present study and literature data on Corg content, origin and burial rates, the fjords were classified into four categories: temperate, subarctic, Arctic with and without glaciers. The variability in marine productivity, terrestrial inflows and carbon sequestration in fjords must be considered for global estimates of their role in blue carbon storage and for building scenarios of future changes in the course of climate warming. 
PY 2019
PD DEC
SO Journal Of Geophysical Research-biogeosciences
SN 2169-8953
PU American Geophysical Union (AGU)
VL 124
IS 12
UT 000501974000001
BP 3737
EP 3751
DI 10.1029/2019JG005140
ID 70318
ER

EF