The abrupt onset of the modern South Asian Monsoon winds
The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 k...
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| creator | Betzler, Christian Eberli, Gregor P. Kroon, Dick Wright, James D. Swart, Peter K. Nath, Bejugam Nagender Alvarez-Zarikian, Carlos A. Alonso-García, Montserrat Bialik, Or M. Blättler, Clara L. Guo, Junhua Adam Haffen, Sébastien Horozal, Senay Inoue, Mayuri Jovane, Luigi Lanci, Luca Laya, Juan Carlos Mee, Anna Ling Hui Lüdmann, Thomas Nakakuni, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesús Slagle, Angela L. Sloss, Craig R. Su, Xiang Yao, Zhengquan Young, Jeremy R. |
| description | The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment’s content of particulate organic matter. A weaker ‘proto-monsoon’ existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic control, and we propose that the post Miocene Climate Optimum cooling, together with increased continentalization and establishment of the bipolar ocean circulation, i.e. the beginning of the modern world, shifted the monsoon over a threshold towards the modern system. |
| doi_str_mv | 10.1038/srep29838 |
| format | Article |
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Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment’s content of particulate organic matter. A weaker ‘proto-monsoon’ existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. 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A weaker ‘proto-monsoon’ existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic control, and we propose that the post Miocene Climate Optimum cooling, together with increased continentalization and establishment of the bipolar ocean circulation, i.e. the beginning of the modern world, shifted the monsoon over a threshold towards the modern system.</description><subject>704/106/2738</subject><subject>704/106/413</subject><subject>Gamma rays</subject><subject>Geophysics</subject><subject>Humanities and Social Sciences</subject><subject>Marine geology</subject><subject>Miocene</subject><subject>Monsoons</subject><subject>multidisciplinary</subject><subject>Ocean circulation</subject><subject>Ocean currents</subject><subject>Particulate organic matter</subject><subject>Precipitation</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Sea level</subject><subject>Sediments</subject><subject>Upwelling</subject><subject>Water circulation</subject><subject>Wind</subject><subject>Wind-driven currents</subject><issn>2045-2322</issn><issn>2045-2322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>BENPR</sourceid><recordid>eNplkU1LAzEQhoMottQe_AOy4EWF1XxvchFK8QsqHqznkO1m2y27SU12Ff-9Ka2lag6TMPPwzmReAE4RvEaQiJvgzQpLQcQB6GNIWYoJxod77x4YhrCE8TAsKZLHoIczSjjLaB-I6cIkOvfdqk2cDSbGMmljrnGF8TZ5dV27SEah0jZ5joBzNvmsbBFOwFGp62CG23sA3u7vpuPHdPLy8DQeTVLNGG3TkrJSSF6UHFFkMmGKXBhpuMxZUeQoJ5QQzcg6VxpKKeaMYw41RhBRzCgZgNuN7qrLG1PMjG29rtXKV432X8rpSv2u2Gqh5u5DUckQFzwKXGwFvHvvTGhVU4WZqWttjeuCQgJymPEMyoie_0GXrvM2fi9SKBMSEoQjdbmhZt6FuP1yNwyCam2J2lkS2bP96XfkjwERuNoAIZbs3Pi9lv_UvgGBO5Pn</recordid><startdate>20160720</startdate><enddate>20160720</enddate><creator>Betzler, Christian</creator><creator>Eberli, Gregor P.</creator><creator>Kroon, Dick</creator><creator>Wright, James D.</creator><creator>Swart, Peter K.</creator><creator>Nath, Bejugam Nagender</creator><creator>Alvarez-Zarikian, Carlos A.</creator><creator>Alonso-García, Montserrat</creator><creator>Bialik, Or M.</creator><creator>Blättler, Clara L.</creator><creator>Guo, Junhua Adam</creator><creator>Haffen, Sébastien</creator><creator>Horozal, Senay</creator><creator>Inoue, Mayuri</creator><creator>Jovane, Luigi</creator><creator>Lanci, Luca</creator><creator>Laya, Juan Carlos</creator><creator>Mee, Anna Ling Hui</creator><creator>Lüdmann, Thomas</creator><creator>Nakakuni, Masatoshi</creator><creator>Niino, Kaoru</creator><creator>Petruny, Loren M.</creator><creator>Pratiwi, Santi D.</creator><creator>Reijmer, John J. 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G.</au><au>Reolid, Jesús</au><au>Slagle, Angela L.</au><au>Sloss, Craig R.</au><au>Su, Xiang</au><au>Yao, Zhengquan</au><au>Young, Jeremy R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The abrupt onset of the modern South Asian Monsoon winds</atitle><jtitle>Scientific reports</jtitle><stitle>Sci Rep</stitle><addtitle>Sci Rep</addtitle><date>2016-07-20</date><risdate>2016</risdate><volume>6</volume><issue>1</issue><spage>29838</spage><epage>29838</epage><pages>29838-29838</pages><artnum>29838</artnum><issn>2045-2322</issn><eissn>2045-2322</eissn><abstract>The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment’s content of particulate organic matter. A weaker ‘proto-monsoon’ existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic control, and we propose that the post Miocene Climate Optimum cooling, together with increased continentalization and establishment of the bipolar ocean circulation, i.e. the beginning of the modern world, shifted the monsoon over a threshold towards the modern system.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>27436574</pmid><doi>10.1038/srep29838</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | 704/106/2738 704/106/413 Gamma rays Geophysics Humanities and Social Sciences Marine geology Miocene Monsoons multidisciplinary Ocean circulation Ocean currents Particulate organic matter Precipitation Science Science (multidisciplinary) Sea level Sediments Upwelling Water circulation Wind Wind-driven currents |
| title | The abrupt onset of the modern South Asian Monsoon winds |
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