10.1594/PANGAEA.425286
Romero, Oscar E
Oscar E
Romero
0000-0003-0209-3258
Armand, Leanne K
Leanne K
Armand
0000-0003-3995-308X
Crosta, Xavier
Xavier
Crosta
0000-0002-8005-9939
Pichon, Jean-Jacques
Jean-Jacques
Pichon
Relative abundance of diatom species in surface samples from the Southern Ocean, Tropical/Subtropical species
PANGAEA
2005
Event label
Latitude of event
Longitude of event
Elevation of event
DEPTH, sediment/rock
Alveus marinus
Azpeitia tabularis
Fragilariopsis doliolus
Hemidiscus cuneiformis
Roperia tessellata
Thalassionema nitzschioides var. parva
Thalassiosira oestrupii var. oestrupii
Thalassiosira symmetrica
Giant box corer
MultiCorer
Gravity corer (Kiel type)
Counting, diatoms
M46/4
Meteor (1986)
Center for Marine Environmental Sciences (MARUM)
2000-02-17T05:54:00/2000-03-04T02:21:00
en
Supplementary Dataset
10.1016/j.palaeo.2005.03.027
192 data points
text/tab-separated-values
Creative Commons Attribution 3.0 Unported
This paper gives a modern circumscription of Tropical/Subtropical diatoms regarding their relationship with sea-surface temperatures (SST) and sea ice cover. Diatoms from 228 core-top sediment samples collected from the Southern Ocean were studied to determine the geographic distribution of eight major diatom species/taxa preserved in surface sediments generally located north of the Subantarctic Front. The comparison of the relative contribution of diatom species with modern February SST and sea-ice cover reveals species-specific sedimentary distributions regulated both by water temperatures and sea ice conditions. Although selective preservation might have played some role, their presence in surface and downcore sediments from the Southern Ocean are reliable indicators of high SST and poleward transport of waters from the Tropical/Subtropical Atlantic. Our work supports the use of diatom remains to reconstruct past variations of these environmental parameters via qualitative and transfer function approaches.
Depth=Surface sediment 0-1 cm
Supplement to: Romero, Oscar E; Armand, Leanne K; Crosta, Xavier; Pichon, Jean-Jacques (2005): The biogeography of major diatom taxa in Southern Ocean sediments: 3. Subantarctic species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(1-2), 49-65
-24.2485
-17.34
-44.5168
-31.95
Central South Atlantic