TY - JOUR
T1 - Air-water exchange and vertical profiles of organic carbon in a subarctic fjord
AU - Ruiz-Halpern, Sergio
AU - Sejr, Mikael K.
AU - Duarte, Carlos M.
AU - Krause-Jensen, Dorte
AU - Dalsgaard, Tage
AU - Dachs, Jordi
AU - Rysgaard, Søren
PY - 2010/7
Y1 - 2010/7
N2 - In this article, we examine the air-sea exchange of exchangeable organic carbon (OC) as well as the internal pools and sources within a subarctic fjord. Air-water fluxes of OC ranged from an uptake of 22 ± 10 mmol C m -2 d-1 in winter to a release of 2 ± 8 mmol C m-2 d-1 in the fall, sizable compared to that of CO 2 (average uptake of 136 mmol C m-2 d-1 for the fall and 2.6 ± 0.84 mmol C m-2 d-1 in the winter). The water column profiles of exchangeable dissolved organic carbon (EDOC) followed closely those of dissolved organic carbon (DOC), and EDOC represented, on average, about one-third of DOC. The dynamic characteristic and active cycling of EDOC was evidenced by incubation experiments performed on each fjord compartment (sediment, water column, macroalgae) where sediments and macroalgae were found to be substantial sources and the water column acted as a strong sink of EDOC.
AB - In this article, we examine the air-sea exchange of exchangeable organic carbon (OC) as well as the internal pools and sources within a subarctic fjord. Air-water fluxes of OC ranged from an uptake of 22 ± 10 mmol C m -2 d-1 in winter to a release of 2 ± 8 mmol C m-2 d-1 in the fall, sizable compared to that of CO 2 (average uptake of 136 mmol C m-2 d-1 for the fall and 2.6 ± 0.84 mmol C m-2 d-1 in the winter). The water column profiles of exchangeable dissolved organic carbon (EDOC) followed closely those of dissolved organic carbon (DOC), and EDOC represented, on average, about one-third of DOC. The dynamic characteristic and active cycling of EDOC was evidenced by incubation experiments performed on each fjord compartment (sediment, water column, macroalgae) where sediments and macroalgae were found to be substantial sources and the water column acted as a strong sink of EDOC.
UR - http://www.scopus.com/inward/record.url?scp=77955652439&partnerID=8YFLogxK
U2 - 10.4319/lo.2010.55.4.1733
DO - 10.4319/lo.2010.55.4.1733
M3 - Article
AN - SCOPUS:77955652439
SN - 0024-3590
VL - 55
SP - 1733
EP - 1740
JO - Limnology and Oceanography
JF - Limnology and Oceanography
IS - 4
ER -