JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS06] [EE] Evolution and variability of Asian Monsoon and its linkage with Cenozoic global cooling

Tue. May 23, 2017 1:45 PM - 3:15 PM A09 (Tokyo Bay Makuhari Hall)

convener:Ryuji Tada(Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo), Christian Betzler(University of Hamburg), Peter Dominic Clift(Louisiana State University), Chairperson:Takuya Sagawa(Institute of Science and Engineering, Kanazawa University), Chairperson:Yoshimi Kubota(National Museum of Nature and Science)

2:55 PM - 3:15 PM

[MIS06-05] Five million year record of summer monsoon winds and continental aridity from The Maldives carbonate platform (IODP Site U1467)

★Invited papers

*Dirk Kroon1, Tereza Kunkelova1, Simon Jung1, Erica Sandra de Leau1, Nick Odling1, Silvia Spezzaferri2, Stefanie Hayman2, Andres Rüggeberg2, Montserrat Alonso Garcia3, JIm Wright4, Carlos Alvarez Zarikian5, Christian Betzler6, Gregor Eberli7, Luigi Jovane8, Juan Laya9, Anna Ling Hui-Mee7, John Reijmer10, Juan Reolid9, Craig Sloss11 (1.School of GeoSciences; University of Edinburgh; Scotland, 2.Earth Sciences;Universite of Fribourg; Switzerland, 3.Instituto Portugues do Mar e da Atmosfera (IPMA), Lisboa, and Centro de Ciências do Mar (CCMAR), Universidade do Algarve, Faro, Portugal, 4.Department of Geological Sciences, Rutgers, USA, 5.IODP, Texas A&M University, College Station, TX 77845, USA, 6.Institute of Geology, CEN, University of Hamburg, Germany, 7.Department of Marine Geosciences, University of Miami, USA, 8.Instituto Oceanográfico da Universidade de São Paulo; Praça do Oceanográfico, 191, Brazil, 9.Department of Geology and Geophysics, Texas A &M University, College Station, 10.College of Petroleum Engineering and Geosciences, KFUPM, Dhahran, Saudi Arabia, 11.School of Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane Australia)

Keywords: monsoon records, dust, ITCZ, Maldives, hominin migration routes

Strong winds and the proximity of arid source-areas result in a large flux of desert dust from the continents to the Arabian Sea in summer. This research identifies the main controls on dust influx into the northern Indian Ocean over the last 5 million years by analyzing the first high resolution marine sediment record from The Maldives carbonate platform (IODP Expedition 359; Site U1467), an area strongly affected by the monsoon seasons. Here we present variations in the concentration of specific normalized elements (e.g. Fe/Al, Si/Al), from X-ray fluorescence spectrometry, reflecting variations in the dust flux. We investigate the degree of coupling between the new dust record and Earth’s climate in the northern hemisphere. This research paves the way for understanding hominin migration pathways from Africa to Asia.