FN Archimer Export Format
PT J
TI Glacial-interglacial size variability in the diatom Fragilariopsis kerguelensis: Possible iron/dust controls?
BT 
AF CORTESE, G.
   GERSONDE, R.
   MASCHNER, K.
   MEDLEY, P.
AS 1:1;2:2;3:3;4:4;
FF 1:;2:;3:;4:;
C1 GNS Sci, Dept Paleontol, Lower Hutt 5040, New Zealand.
   Alfred Wegener Inst Polar & Marine Res, Geosci Div, D-27515 Bremerhaven, Germany.
   German Oceanog Museum, D-18439 Stralsund, Germany.
   Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
C2 GNS SCI, NEW ZEALAND
   INST A WEGENER, GERMANY
   GERMAN OCEANOG MUSEUM, GERMANY
   UNIV COLORADO, USA
IF 3.3
TC 19
UR https://archimer.ifremer.fr/doc/00496/60807/65445.pdf
   https://archimer.ifremer.fr/doc/00496/60807/65446.jpg
   https://archimer.ifremer.fr/doc/00496/60807/65447.jpg
   https://archimer.ifremer.fr/doc/00496/60807/65448.pdf
   https://archimer.ifremer.fr/doc/00496/60807/65449.pdf
   https://archimer.ifremer.fr/doc/00496/60807/65450.pdf
   https://archimer.ifremer.fr/doc/00496/60807/65451.xls
   https://archimer.ifremer.fr/doc/00496/60807/65452.xls
   https://archimer.ifremer.fr/doc/00496/60807/65453.xls
   https://archimer.ifremer.fr/doc/00496/60807/65454.xls
   https://archimer.ifremer.fr/doc/00496/60807/65455.xls
LA English
DT Article
CR MD 130 / CADO
BO Marion Dufresne
AB The valve area of Fragilariopsis kerguelensis, the most abundant diatom species in the Southern Ocean, strongly changes in size in response to varying conditions in the surface ocean. We examined the link, both in two iron fertilization experiments and in sediment samples covering several glacial Terminations, between size variability in this species and environmental conditions across the Antarctic Polar Front, including sea ice extent, sea surface temperature, and the input of eolian dust. The iron fertilization experiments show valve area to be positively correlated with iron concentrations in ambient waters, which suggests the possibility of a causal relation between valve size of Fragilariopsis kerguelensis and ambient surface water iron concentration. Larger valves are usually found during glacial times and thus seem to be related to lower sea surface temperature and wider sea ice coverage. Moreover, our results indicate that there usually is a strong correlation between larger valve size and increased input of eolian dust to the Southern Ocean. However, this correlation, obvious for the fertilization experiments and for glacial Terminations I, II, III, and V, does not seem to be valid for Termination VI, where size appears to be inversely correlated to dust input. 
PY 2012
PD FEB
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 27
IS 1
UT 000300826900001
DI 10.1029/2011PA002187
ID 60807
ER

EF