A Comprehensive Evaluation of C25 Highly Branched Isoprenoid Alkenes of Marine Diatoms as Proxies for Sea Ice Extent in the Arctic Ocean ...

• Main Author: Muniak, Tetiana
• Format: Text
• Language: unknown
• Published: Old Dominion University 2014
• Subjects: Arctic; Arctic Ocean; Sea ice
• Online Access: https://dx.doi.org/10.25777/sehg-mk31; https://digitalcommons.odu.edu/oeas_etds/265/

Sea Ice extent is one of the major factors regulating carbon cycling and ecosystem function in the modern Arctic Ocean. It is an essential component of climate models and is crucial for the evaluation of various oceanographic processes that influence a particular region. Yet it is also one of the most difficult attributes of the ocean with respect to our ability for its accurate reconstruction from paleo records. The lack of the detailed records prior to satellite information has encouraged the development of new proxy records for the reconstruction of past sea ice conditions. In recent years, a new monounsaturated sesterterpenoid biomarker for the presence of the Arctic sea ice, termed IP25 (Ice Proxy with 25 carbon atoms), has been proposed based on its observation in environmental records. Relatively few studies have, to date, concentrated on investigating the factors that influence production and fate of IP25, and its universal applicability to the entire Arctic region have never been tested. To ...