Late Holocene diatom abundaces in sediment core HC-11

• Main Authors: Tsoy, Ira B, Obrezkova, Maria S, Aksentov, KI, Kolesnik, Alexander N, Panov, V S
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Actinocyclus curvatulus; Actinocyclus ochotensis; Actinocyclus octonarius; Actinocyclus sp.; Actinocyclus subtilis; Actinoptychus senarius; Actinoptychus sp.; Amphora proteus; Amphora sp.; Aulacodiscus sp.; Bacterosira bathyomphala; Chaetoceros debilis; Chaetoceros diadema; Chaetoceros didymus; Chaetoceros furcellatus; Chaetoceros holsaticus; Chaetoceros ingolfianus; Chaetoceros lorenzianus; Chaetoceros mitra; Chaetoceros spp.; Chukchi Sea; Cocconeis costata; Cocconeis scutellum; Core; Coscinodiscus apiculatus; Coscinodiscus argus; Coscinodiscus asteromphalus; Coscinodiscus marginatus; Coscinodiscus oculus-iridis; Coscinodiscus radiatus; Cosmiodiscus insignis; Delphineis surirella; Depth; bottom/max; sediment/rock; top/min; Detonula confervacea; Dictyochophyceae; Diploneis smithii; Diploneis smithii var. rhombica; Diploneis subcincta; Distephanus speculum; Distephanus speculum minutus; Encyonema silesiacum; Entomoneis gigantea var. septentrionalis; Eunotia praerupta; Fossula arctica; Mitra; Chukchi
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.867181; https://doi.org/10.1594/PANGAEA.867181

The study of diatoms in core HC11 collected from the southwestern part of Chukchi Sea, allowed to distinguish 3 diatoms ecological zones, reflecting paleoenvironmental changes during the last 2300 years. The sediment age was based on the sedimentation rates, determined by 210Pb and radiocarbon dating of mollusk shells. The environmental changes of Chukchi Sea revealed by examination of diatoms correlates with global climate changes - the warming of the early and middle Subatlantic and cooling of the late Subatlantic (Little Ice Age). Warming early and middle Subatlantic in the Chukchi Sea was probably stronger than the warming of the late 20th century and was not accompanied by significant changes in sea level.