Proceedings of the Integrated Ocean Drilling Program 323: Bering Sea Paleoceanography

• Main Authors: Takahashi, Kozo, Ravelo, Christina, Alvarez Zarikian, Carlos A., Aiello, Ivano W., Asahi, Hirofumi, Bartoli, Gretta, Caissie, Beth, Chen, Muhong, Colmenero Hidalgo, Elena, Cook, Mea, Dadd, Kelsie A., Guerin, Gilles, Huh, Youngsook, Husum, Katrine, Ijiri, Akira, Ikehara, Minoru, Kender, Sev, Liu, Tanzhuo, Lund, Steve P., März, Christian, Mix, Alan C., Ojha, Maheswar, Okada, Makoto, Okazaki, Yusuke, Onodera, Jonaotaro, Pierre, Catherine, Radi, Taoufik, Risgaard-Petersen, Nils, Sakamoto, Tatsuhiko, Scholl, David W., Schrum, Heather, Stroynowski, Zuzanna N., Walsh, Emily A., Wehrmann, Laura
• Other Authors: Integrated Ocean Drilling Program
• Format: Book
• Language: unknown
• Published: Integrated Ocean Drilling Program Management International, Inc. 2011
• Subjects: Integrated Ocean Drilling Program; IODP; JOIDES Resolution; Expedition 323; Site U1339; Site U1340; Site U1341; Site U1342; Site U1343; Site U1344; Site U1345; Bering sea paleoceanography; Environmental change; processes; and effects; North Pacific Intermediate Water; Bering Strait; Umnak Plateau; Bowers Ridge; microbiology; deep biosphere; Bering Sea; Sea ice
• Online Access: https://doi.org/10.5281/zenodo.10882834; https://doi.org/10.2204/iodp.proc.323.2011

Paleoclimate and paleoceanographic studies present opportunities to study the dynamics of the climate system by examining how it responds to external forcing (e.g., greenhouse gas and solar radiation changes) and how its interacting components generate climate oscillations and abrupt changes. Of note is the amplified recent warming of the high latitudes in the Northern Hemisphere, which is presumably related to sea ice albedo feedback and teleconnections to other regions; both the behavior of sea ice–climate interactions and the role of large-scale atmospheric and oceanic circulation in climate change can be studied with geologic records of past climate change in the Bering Sea. Drilling in the Bering Sea may help answer questions not only about the global extent of climate trends and oscillations but also about the mechanisms that produce them. In addition to having important sedimentary records of past climate change, the Bering Sea is a region of relatively high surface productivity, elevated intermediate-water and deepwater nutrient concentrations, and microbially mediated biogeochemical cycling. Thus, Integrated Ocean Drilling Program (IODP) Expedition 323 was also dedicated to examining for the first time subseafloor biomass and microbial processes in high-productivity regions. The major objectives of Expedition 323 in the Bering Sea are (1) To elucidate a detailed evolutionary history of climate and surface-ocean conditions since the earliest Pliocene in the Bering Sea, where amplified high-resolution changes in climatic signals are recorded; (2) To shed light on temporal changes in the origin and intensity of NPIW and possibly deeper water mass formation in the Bering Sea; (3) To characterize the history of continental glaciation, river discharges, and sea ice formation in order to investigate the link between the continental and oceanic conditions of the Bering Sea and adjacent land areas; (4) To investigate, through comparison to pelagic records, linkages between ocean/climate processes that occur in ...