Relative abundance of diatom species in surface samples from the Southern Ocean, Tropical/Subtropical species


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

Related Identifier
Metadata Access
Creator Romero, Oscar E ; Armand, Leanne K (ORCID: 0000-0003-3995-308X); Crosta, Xavier ; Pichon, Jean-Jacques
Publisher PANGAEA
Publication Year 2005
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 192 data points
Discipline Earth System Research
Spatial Coverage (-24.248W, -44.517S, -17.340E, -31.950N); Central South Atlantic
Temporal Coverage Begin 2000-02-17T05:54:00Z
Temporal Coverage End 2000-03-04T02:21:00Z