Publication Date:
2024-02-02
Description:
[1] We used planktic foraminiferal assemblages in 70 sediment cores from the tropical and subtropical South Atlantic Ocean (10°N–37°S) to estimate annual mean sea surface temperatures (SSTs) and seasonality for the Last Glacial Maximum with a modified version of the Imbrie-Kipp transfer function method (IKTF) that takes into account the abundance of rare but temperature sensitive species. In contrast to CLIMAP Project Members [1981], the reconstructed SSTs indicate cooler glacial SSTs in the entire tropical/subtropical South Atlantic with strongest cooling in the upwelling region off Namibia (7–10°C) and smallest cooling (1–2°C) in the western subtropical gyre. In the western Atlantic, our data support recent temperature estimates from other proxies. In the upwelling regions in the eastern Atlantic, our data conflict with SST reconstructions from alkenones, which may be due to an environmental preference of the alkenone-producing algae or to an underestimation of foraminiferal SSTs due to anomalous high abundances of N. pachyderma (sinistral).
Keywords:
06MT15_2; 06MT41_3; Amazon Fan; Angola Basin; Argentine Basin; Brazil Basin; Candeina nitida; Cape Basin; Counting 〉150 µm fraction; Dentagloborotalia anfracta; DEPTH, sediment/rock; East Brazil Basin; Eastern Rio Grande Rise; Elevation of event; Equatorial Atlantic; Event label; Foraminifera, planktic; GeoB; GeoB1008-3; GeoB1016-3; GeoB1028-5; GeoB1031-4; GeoB1032-3; GeoB1034-3; GeoB1041-3; GeoB1101-5; GeoB1105-4; GeoB1112-4; GeoB1115-4; GeoB1117-2; GeoB1214-1; GeoB1220-1; GeoB1306-1; GeoB1309-2; GeoB1312-2; GeoB1413-4; GeoB1417-1; GeoB1419-2; GeoB1501-4; GeoB1503-1; GeoB1505-1; GeoB1508-4; GeoB1515-1; GeoB1523-1; GeoB1701-4; GeoB1706-2; GeoB1711; GeoB1711-4; GeoB1722-1; GeoB1903-3; GeoB1905-3; GeoB2004-2; GeoB2016-1; GeoB2019-1; GeoB2021-5; GeoB2109-1; GeoB2116-4; GeoB2117-1; GeoB2125-1; GeoB2202-4; GeoB2204-2; GeoB2215-10; GeoB2819-1; GeoB3104-1; GeoB3117-1; GeoB3175-1; GeoB3176-1; GeoB3603-2; GeoB3722-2; GeoB3801-6; GeoB3808-6; GeoB3813-3; GeoB5112-5; GeoB5115-2; GeoB5121-2; GeoB5133-3; GeoB5140-3; Geosciences, University of Bremen; Giant box corer; GKG; Globigerina bulloides; Globigerina calida; Globigerina digitata; Globigerina falconensis; Globigerina quinqueloba; Globigerinella aequilateralis; Globigerinita bradyi; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides ruber highspired; Globigerinoides ruber pink; Globigerinoides ruber white; Globigerinoides sacculifer sac; Globigerinoides sacculifer wo sac; Globigerinoides tenellus; Globoquadrina conglomerata; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia inflata; Globorotalia menardii; Globorotalia menardii flexuosa; Globorotalia scitula; Globorotalia theyeri; Globorotalia truncatulinoides dextral; Globorotalia truncatulinoides sinistral; Globorotalia tumida; Globorotaloides hexagonus; Globoturborotalita rubescens pink; Globoturborotalita rubescens white; Gravity corer (Kiel type); Guinea Basin; Hastigerina pelagica; Hunter Channel; JOPSII-6; KOL; LATITUDE; LONGITUDE; M12/1; M15/2; M16/1; M16/2; M20/2; M23/1; M23/2; M23/3; M29/2; M34/1; M34/2; M34/3; M41/3; M6/6; M9/4; Meteor (1986); Mid Atlantic Ridge; MUC; MultiCorer; Namibia continental slope; NE-Brazilian continental margin; Neogloboquadrina dutertrei; Neogloboquadrina pachyderma dextral; Neogloboquadrina pachyderma dextral and dutertrei integrade; Neogloboquadrina pachyderma sinistral; Niger Sediment Fan; Northern Cape Basin; Orbulina universa; Piston corer (Kiel type); Pulleniatina obliquiloculata; Rio Grande Rise; SL; SO84; Sonne; South African margin; Southern Cape Basin; Southwest Walvis Ridge; Sphaeroidinella dehiscens; ST. HELENA HOTSPOT; Tenuitella iota; Turborotalita humilis; Victor Hensen; Walvis Ridge; Walvis Ridge, Southeast Atlantic Ocean; West Angola Basin
Type:
Dataset
Format:
text/tab-separated-values, 6559 data points
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