FN Archimer Export Format
PT J
TI Combining the Mg/Ca of the ostracod Cyprideis torosa with its ontogenic development for reconstructing a 28 kyr temperature record for Lake Banyoles (NE Spain)
BT 
AF WANSARD, G.
   DE DECKKER, P.
   JULIA, R.
AS 1:;2:;3:;
FF 1:;2:;3:;
C1 20 Rue Culot, B-1320 Tourinnes La Grosse, Belgium.
   Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia.
   Casanova 75, Barcelona 08011, Spain.
C2 20 Rue Culot, B-1320 Tourinnes La Grosse, Belgium.
   UNIV AUSTRALIAN NATL, AUSTRALIA
   Casanova 75, Barcelona 08011, Spain.
IF 0.5
TC 4
UR https://archimer.ifremer.fr/doc/00421/53198/54987.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
DE ;ostracod valve chemistry;optimal growth;moulting temperature;Late Quaternary;Last Glacial Maximum;water temperature reconstructions;land-sea correlation
AB Cyprideis torosa is a ubiquitous ostracod found in fresh to hypersaline waters, and commonly in large numbers across the Mediterranean region. Single valves of 51 adult specimens of C. torosa were separated from carapaces that were collected from Lake Banyoles in NE Spain at a depth of 5 m. The Mg/Ca of the valves was compared with known temperatures necessary for successive instar valve calcification, the latter being based on a four-year ecological study of C. torosa collected at Dievengat in northern Belgium by Carlo Heip in 1968-72. Hence, we were able to link the Mg/Ca of fossil valves of C. torosa recovered for a 28 kyr sequence at La Draga, cored on the fringe of Lake Banyoles, with the ontogenic observations of Heip, and reconstruct mean summer temperatures as well as optimal calcification temperature for C. torosa. Principal findings are: (1) the Holocene registered the highest temperatures with also very broad fluctuations; (2) three cold phases are clearly identified at 26.7-23.2, 21.6-20.3 and 16.2-14.3 ka BP; and (3) a prolonged warm phase that lasted about two millennia commenced at 19.5 ka BP and was followed by a progressive temperature decline well over three millennia. Surprisingly the Last Glacial Maximum was not the coldest phase. We finally compare our results with sea-surface temperature (SST) reconstructions from cores from the western Mediterranean Sea. Our record from La Draga clearly matches events recorded in the Alboran Sea that display SST changes obtained from the U-37(K') index. The Heinrich 1 and 2 events around 16 and 28 ka BP coincide with significant low temperature excursions at Banyoles, and palynological records in the marine cores which define semi-arid conditions on land match the low temperature record in our core. 
PY 2017
PD JAN
SO Journal Of Micropalaeontology
SN 0262-821X
PU Geological Soc Publ House
VL 36
UT 000393679500009
BP 50
EP 56
DI 10.1144/jmpaleo2015-009
ID 53198
ER

EF