Diatom abundance in surface sediments of the Southern Ocean ...

• Main Authors: Esper, Oliver, Gersonde, Rainer
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Actinocyclus actinochilus; Actinocyclus curvatulus; Alveus marinus; Asteromphalus hookeri; Asteromphalus hyalinus; Asteromphalus parvulus; Azpeitia tabularis var. tabularis; Azpeitia tabularis var egregius; Chaetoceros spp.; Corethron pennatum; Eucampia antarctica; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis doliolus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis separanda; Fragilariopsis sublinearis; Fragilariopsis vanheurckii; Hemidiscus cuneiformis; Nitzschia bicapitata; Navicula directa; Nitzschia kolaczeckii; Porosira pseudodenticulata; Pseudo-nitzschia turgiduloides; Rhizosolenia antennata forma antennata; Rhizosolenia antennata forma semispina; Rhizosolenia bergonii; Rhizosolenia sp.; Rhizosolenia spp.; Roperia tesselata; Stellarima microtrias; Stellarima stellaris; Thalassionema nitzschioides forma 1; Thalassionema nitzschioides var. capitulata; Thalassionema nitzschioides var. lanceolata; Thalassionema nitzschioides var. parva; Thalassionema spp.; Thalassiosira antarctica; Thalassiosira eccentrica; Thalassiosira gracilis var. expecta; Thalassiosira gracilis var. gracilis; Thalassiosira gravida; Antarctic; Southern Ocean; Pacific; Indian; Antarc*; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.828674; https://doi.pangaea.de/10.1594/PANGAEA.828674

Based on the quantitative analysis of diatom assemblages preserved in 274 surface sediment samples recovered in the Pacific, Atlantic and western Indian sectors of the Southern Ocean we have defined a new reference database for quantitative estimation of late-middle Pleistocene Antarctic sea ice fields using the transfer function technique. The Detrended Canonical Analysis (DCA) of the diatom data set points to a unimodal distribution of the diatom assemblages. Canonical Correspondence Analysis (CCA) indicates that winter sea ice (WSI) but also summer sea surface temperature (SSST) represent the most prominent environmental variables that control the spatial species distribution. To test the applicability of transfer functions for sea ice reconstruction in terms of concentration and occurrence probability we applied four different methods, the Imbrie and Kipp Method (IKM), the Modern Analog Technique (MAT), Weighted Averaging (WA), and Weighted Averaging Partial Least Squares (WAPLS), using ... : Data are accessible on request: mailto:[e-mail] ...