Author: Olivia T. GibbPublisher:
ISBN:
Category : Paleoceanography
Languages : en
Pages : 264
Book Description
Foraminiferal Indicators of Paleoceanographic and Sea-ice Conditions in the Amundsen Gulf and Viscount Melville Sound, Canadian Arctic
Author: Olivia T. GibbPublisher:
ISBN:
Category : Paleoceanography
Languages : en
Pages : 264
Book Description
Benthic Foraminifera as Paleo-sea-ice Indicators in the Western Arctic Ocean
Author: Kelly Best LazarPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
As global climate continues to warm, the Arctic Ocean is becoming increasingly vulnerable, largely due to a fast retreat of sea ice. Knowledge of paleo-sea-ice conditions is essential for comprehending the changing Arctic system. This study combines micropaleontological (foraminiferal) data with existing litho- and chronostratigraphic results to construct a more resolved stratigraphic record and history of sea-ice change during the Quaternary in the western Arctic Ocean. Benthic foraminiferal assemblages were investigated in four sediment cores from the Northwind, Mendeleev, and Lomonosov Ridges (western Arctic Ocean). A uniquely-preserved sediment core from the Northwind Ridge was found to contain the longest calcareous foraminiferal record in the Arctic Ocean, estimated to extend to the early Pleistocene, ca. 1.5 Ma. This record was divided into two assemblage zones, representing distinct changes in foraminiferal composition with respect to ecological groups (polar vs. phytodetrital species) and extinct taxa. The distribution of polar and phytodetrital species yields significant information related to sea ice (perennial vs. seasonal) and associated climatic conditions. A principal faunal and sedimentary turnover occurred near the early-middle Pleistocene boundary (estimated ca 0.7-0.8 Ma), indicating an advance of perennial sea ice along with an increase in glacial inputs from the Laurentide ice sheet at the end of the Mid-Pleistocene Transition (MPT).
Benthic foraminiferal assemblages in the Arctic ocean : indicators for water mass distribution, productivity, and sea ice drift
Author: Arctic Ocean benthic foraminiferal faunal change associated with the onset of perennial sea ice in the middle Miocene
Author: S. KenderForaminifera from Late Quarternary Sediments of the Chukchi Borderland, Arctic Ocean
Author: Lawrence Andrew FeboPublisher:
ISBN:
Category :
Languages : en
Pages : 408
Book Description
Report of the Canadian Arctic Expedition
Author: Joseph A. CushmanForaminifera in Sediment Cores from Beaufort Sea and Parry Channel, Canadian Arctic
Author: Gustavs VilksMarine Sediments of Prince of Wales Strait and Amundsen Gulf, West Canadian Arctic
Author: Richard G. BaderForaminiferal Study of East Bay, Mackenzie King Island, District of Mackenzie
Author: Gustavs VilksPublisher:
ISBN:
Category : Foraminifera
Languages : en
Pages : 0
Book Description
"The area of this study was chosen to provide information on the Foraminifera of an Arctic inshore environment. Results show that the population is dominated by arenaceous agglutinated forms and that the number of species decreases toward the shore although the number of individuals increases. Each of three bathymetric zones is apparently dominated by a particular species and the whole population is indicative of a cold environment with lengthy annual ice cover." --
Author: Anne Boersma