FN Archimer Export Format
PT J
TI Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode
BT 
AF HAUCK, J.
   VOELKER, C.
   WANG, T.
   HOPPEMA, M.
   LOSCH, M.
   WOLF-GLADROW, D. A.
AS 1:1;2:1;3:1;4:1;5:1;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, D-27515 Bremerhaven, Germany.
C2 INST A WEGENER, GERMANY
IF 4.528
TC 99
UR https://archimer.ifremer.fr/doc/00292/40352/38988.pdf
   https://archimer.ifremer.fr/doc/00292/40352/38989.pdf
   https://archimer.ifremer.fr/doc/00292/40352/38990.pdf
   https://archimer.ifremer.fr/doc/00292/40352/38991.pdf
LA English
DT Article
CR OISO 8
   OISO1
   OISO2
   OISO3-NIVMER98
   OISO4 (VT 46)
   OISO5 (VT 49)
   VT 105 / OISO 17
   VT 108 / OISO-18
   VT 114 / OISO-19
   VT 117 / OISO-20
   VT 120 / OISO-21
   VT 127 / OISO-22
   VT 51 / OISO 6
   VT 57 / OISO 9
   VT 60 / CARAUS - OISO 10
   VT 62 / CARAUS - OISO 11
   VT 79 / OISO 12
   VT 80 / OISO 13
   VT 81 / OISO 14
   VT 85 / OISO 15
   VT 94 / OISO 16
BO Marion Dufresne
DE ;Southern Ocean;southern annular mode;carbon cycle;carbon sink
AB Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the southern annular mode (SAM) toward its high-index polarity. The positive phase of the SAM is characterized by stronger than usual westerly winds that induce changes in the physical carbon transport. Changes in the natural carbon budget of the upper 100 m of the Southern Ocean in response to a positive SAM phase are explored with a coupled ecosystem-general circulation model and regression analysis. Previously overlooked processes that are important for the upper ocean carbon budget during a positive SAM period are identified, namely, export production and downward transport of carbon north of the polar front (PF) as large as the upwelling in the south. The limiting micronutrient iron is brought into the surface layer by upwelling and stimulates phytoplankton growth and export production but only in summer. This leads to a drawdown of carbon and less summertime outgassing (or more uptake) of natural CO2. In winter, biological mechanisms are inactive, and the surface ocean equilibrates with the atmosphere by releasing CO2. In the annual mean, the upper ocean region south of the PF loses more carbon by additional export production than by the release of CO2 into the atmosphere, highlighting the role of the biological carbon pump in response to a positive SAM event.
PY 2013
PD DEC
SO Global Biogeochemical Cycles
SN 0886-6236
PU Amer Geophysical Union
VL 27
IS 4
UT 000329686900023
BP 1236
EP 1245
DI 10.1002/2013GB004600
ID 40352
ER

EF