Expedition 346 summary

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doi: 10.2204/iodp.proc.346.101.2015
Author(s): Tada, Ryuji; Murray, Richard W.; Zarikian, Carlos Alvarez; Lofi, Johanna; Anderson, William T., Jr.; Bassetti, Maria-Angela; Brace, Bobbi J.; Clemens, Steven C.; da Costa Gurgel, Marcio H.; Dickens, Gerald R.; Dunlea, Ann G.; Gallagher, Stephen J.; Giosan, Liviu; Henderson, Andrew C. G.; Holbourn, Ann E.; Ikehara, Ken; Irino, Tomohisa; Itaki, Takuya; Karasuda, Akinori; Kinsley, Christopher W.; Kubota, Yoshimi; Lee, Gwang Soo; Lee, Kyung Eun; Lopes, Cristina I. C. D.; Peterson, Larry C.; Saavedra-Pellitero, Mariem; Sagawa, Takuya; Singh, Raj K.; Sugisaki, Saiko; Toucanne, Samuel; Wan Shiming; Xuan Chuang; Zheng Hongbo; Ziegler, Martin
Integrated Ocean Drilling Program, Expedition 346 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Tokyo, Graduate School of Science, Tokyo, Japan
Other:
Boston University, United States
Texas A&M University, United States
Université Montpellier II, France
Florida International University, United States
Université de Perpignan, France
University of Nebraska, Lincoln, United States
Brown University, United States
Universidade de Sao Paulo, Brazil
Rice University, United States
University of Melbourne, Australia
Woods Hole Oceanographic Institution, United States
University of Newcastle Upon Tyne, United Kingdom
Christian-Albrechts-Universität zu Kiel, Germany
Geological Survey of Japan, Japan
Hokkaido University, Japan
Massachusetts Institute of Technology, United States
National Museum of Nature and Science, Japan
Korea Institute of Geoscience and Mineral Resources, South Korea
Korea Maritime and Ocean University, South Korea
University of Miami, United States
University of Bremen, Germany
Kyushu University, Japan
Indian Institute of Technology-Bhubaneshwar, India
French Research Institute for Exploitation of the Sea, France
Chinese Academy of Sciences, Institute of Oceanology, China
University of Southampton, United Kingdom
Nanjing Normal University, China
Cardiff University, United Kingdom
Volume Title: Proceedings of the Integrated Ocean Drilling Program; Asian monsoon; Expedition 346 of the riserless drilling platform, Valdez, Alaska (USA), to Busan, Republic of Korea; Sites U1422-U1430, 29 July-28 September 2013
Volume Author(s): Tada, Ryuji; Murray, Richard W.; Alvarez Zarikian, Carlos; Lofi, Johanna; Anderson, William T., Jr.; Bassetti, Maria-Angela; Brace, Bobbi J.; Clemens, Steven C.; da Costa Gurgel, Marcio H.; Dickens, Gerald R.; Dunlea, Ann G.; Gallagher, Stephen J.; Giosan, Liviu; Henderson, Andrew C. G.; Holbourn, Ann E.; Ikehara, Ken; Irino, Tomohisa; Itaki, Takuya; Karasuda, Akinori; Kinsley, Christopher W.; Kubota, Yoshimi; Lee, Gwang Soo; Lee, Kyung Eun; Lopes, Cristina I. C. D.; Peterson, Larry C.; Saavedra-Pellitero, Mariem; Sagawa, Takuya; Singh, Raj K.; Sugisaki, Saiko; Toucanne, Samuel; Wan Shiming; Xuan Chuang; Zheng Hongbo; Ziegler, Martin
Source: Proceedings of the Integrated Ocean Drilling Program; Asian monsoon; Expedition 346 of the riserless drilling platform, Valdez, Alaska (USA), to Busan, Republic of Korea; Sites U1422-U1430, 29 July-28 September 2013, Ryuji Tada, Richard W. Murray, Carlos Alvarez Zarikian, Johanna Lofi, William T. Anderson, Jr., Maria-Angela Bassetti, Bobbi J. Brace, Steven C. Clemens, Marcio H. da Costa Gurgel, Gerald R. Dickens, Ann G. Dunlea, Stephen J. Gallagher, Liviu Giosan, Andrew C. G. Henderson, Ann E. Holbourn, Ken Ikehara, Tomohisa Irino, Takuya Itaki, Akinori Karasuda, Christopher W. Kinsley, Yoshimi Kubota, Gwang Soo Lee, Kyung Eun Lee, Cristina I. C. D. Lopes, Larry C. Peterson, Mariem Saavedra-Pellitero, Takuya Sagawa, Raj K. Singh, Saiko Sugisaki, Samuel Toucanne, Wan Shiming, Xuan Chuang, Zheng Hongbo and Martin Ziegler; Integrated Ocean Drilling Program, Expedition 346 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program (Online), Vol.346, 61p. Publisher: Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC, United States. ISSN: 1930-1014 CODEN: IDSDA6
Note: In English. 21 refs.; illus., incl. 1 table, sketch maps
Summary: Integrated Ocean Drilling Program (IODP) Expedition 346 (29 July-27 September 2013) drilled seven sites covering a wide latitudinal range in the body of water bordered by the Eurasian continent, the Korean Peninsula, and the Japanese Islands, as well as two closely spaced sites in the East China Sea. This expedition recovered 6135.3 m of core with an average recovery of 101% -- a record amount of core recovered during any single IODP expedition. Expedition 346 was the first scientific drilling expedition ever to focus exclusively on the climate system in this region, which is at once so critical yet potentially vulnerable to the challenges society faces in the coming years of global climate change. With the East Asian Monsoon directly affecting the water supply of one-third of the global population, the expedition scientific re sults and postxpedition research that will follow have direct bearing on society's understanding of this complex atmosphere-ocean climate system. The high quality of materials recovered and the complete documentation of their geological, geochemical, and geophysical context will lead to an unparalleled series of future studies by the expedition Science Party as well as many other scientists over the coming decades. Cores obtained during this expedition will be used to test the hypothesis that Pliocene-Pleistocene uplift of the Himalaya and Tibetan Plateau, and the consequent emergence of the two discrete modes of Westerly Jet circulation, caused the amplification of millennial-scale variability of the East Asian summer monsoon and East Asian winter monsoon and provided teleconnection mechanism(s) for Dansgaard-Oeschger cycles. Recent and novel advances in drilling technology and newly developed analytical tools enabled collection and examination of sediment records that were impossible to acquire even a few years ago. The newly engineered half advanced piston corer enabled recovery of the deepest piston core in Deep Sea Drilling Project/ Ocean Drilling Program/IODP history (490.4 m in IODP Hole U1427A); that achievement was also the deepest continuously recovered piston cored sequence, initiated at the mudline and penetrating to ∼500 m core depth below seafloor, Method A (CSF-A). Technological advances delivered a series of "new surprises" (e.g., pristine dark-light laminae from ∼12 Ma sediment recovered by piston core from 410 m CSF-A at IODP Site U1425 and from 210 m CSF-A at IODP Site U1430) that will stimulate new scientific inquiry into climate dynamics during a time frame and with a high fidelity that could have only been imagined by scientists even a short time ago. With a novel fluid extraction technique, high-resolution geochemistry studies targeting the anaerobic oxidation of methane and the relationships between metal chemistry and the degradation of organic carbon were performed to study the fate of organic carbon in the marine system and constrain rates of microbial reactions in the deep biosphere. Finely tuned stratigraphic comparisons were developed between disparate geographic locations and demonstrated synchroneity in this marginal sea's regional response to internal and external climate-related forcing.
Year of Publication: 2013
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Algae; Biostratigraphy; Boreholes; Cenozoic; Chemostratigraphy; Climate forcing; Cores; Diatoms; East China Sea; Expedition 346; Foraminifera; IODP Site U1422; IODP Site U1423; IODP Site U1424; IODP Site U1425; IODP Site U1426; IODP Site U1427; IODP Site U1428; IODP Site U1429; IODP Site U1430; Integrated Ocean Drilling Program; Invertebrata; Japan Basin; Japan Sea; Lithostratigraphy; Magnetic properties; Magnetic susceptibility; Magnetostratigraphy; Marine geology; Marine sediments; Microfossils; Monsoons; Nannofossils; Neogene; North Pacific; Northwest Pacific; Orbital forcing; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Paleomagnetism; Physical properties; Plantae; Pliocene; Protista; Quaternary; Radiolaria; Sediments; Tertiary; Ulleung Basin; Well logs; West Pacific; Yamato Basin; Yamato Rise
Coordinates: N313700 N434600 E1390500 E1285930
Record ID: 2015038116
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