Role of Asian summer monsoon subsystems in the inter-hemispheric progression of deglaciation
The responses of Asian monsoon subsystems to both hemispheric climate forcing and external orbital forcing are currently issues of vigorous debate. The Indian summer monsoon is the dominant monsoon subsystem in terms of energy flux, constituting one of Earth’s most dynamic expressions of ocean–atmos...
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| Veröffentlicht in: | Nature geoscience 2019-04, Vol.12 (4), p.290-295 |
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| description | The responses of Asian monsoon subsystems to both hemispheric climate forcing and external orbital forcing are currently issues of vigorous debate. The Indian summer monsoon is the dominant monsoon subsystem in terms of energy flux, constituting one of Earth’s most dynamic expressions of ocean–atmosphere interactions. Yet, the Indian summer monsoon is grossly under-represented in Asian monsoon palaeoclimate records. Here, we present high-resolution records of Indian summer monsoon-induced rainfall and fluvial runoff recovered in a sediment core from the Bay of Bengal across Termination II, 139–127 thousand years ago, including coupled measurements of the oxygen isotopic composition and Mg/Ca, Mn/Ca, Nd/Ca and U/Ca ratios in surface-ocean-dwelling foraminifera. Our data reveal a millennial-scale transient strengthening of the Asian monsoon that punctuates Termination II associated with an oscillation of the bipolar seesaw. The progression of deglacial warming across Termination II emerges first in the Southern Hemisphere, then the tropics in tandem with Indian summer monsoon strengthening, and finally the Northern Hemisphere. We therefore suggest that the Indian summer monsoon was a conduit for conveying Southern Hemisphere latent heat northwards, thereby promoting subsequent Northern Hemisphere deglaciation.
During deglacial warming at Termination II, about 130,000 years ago, the Indian summer monsoon helped convey heat northwards as deglaciation progressed from the Southern to the Northern Hemisphere, according to sediment records from the Bay of Bengal. |
| doi_str_mv | 10.1038/s41561-019-0319-5 |
| format | Article |
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During deglacial warming at Termination II, about 130,000 years ago, the Indian summer monsoon helped convey heat northwards as deglaciation progressed from the Southern to the Northern Hemisphere, according to sediment records from the Bay of Bengal.</description><identifier>ISSN: 1752-0894</identifier><identifier>EISSN: 1752-0908</identifier><identifier>DOI: 10.1038/s41561-019-0319-5</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>704/106/2738 ; 704/106/413 ; Asian monsoons ; Calcium ; Deglaciation ; Earth ; Earth and Environmental Science ; Earth Sciences ; Earth System Sciences ; Energy flux ; Energy transfer ; Foraminifera ; Geochemistry ; Geology ; Geophysics/Geodesy ; Interactions ; Isotope composition ; Isotopes ; Latent heat ; Magnesium ; Manganese ; Meltwater ; Monsoon climates ; Monsoon rainfall ; Monsoons ; Northern Hemisphere ; Ocean currents ; Oceans ; Oxygen ; Palaeoclimate ; Paleoclimate ; Rain ; Rainfall ; Ratios ; Records ; Runoff ; Southern Hemisphere ; Subsystems ; Summer ; Summer monsoon ; Tropical environments ; Wind</subject><ispartof>Nature geoscience, 2019-04, Vol.12 (4), p.290-295</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Limited 2019</rights><rights>2019© The Author(s), under exclusive licence to Springer Nature Limited 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a448t-3817908ffc1188feb25466e8fc6c3b91ff6ec0b7cd67581683243e88d012edff3</citedby><cites>FETCH-LOGICAL-a448t-3817908ffc1188feb25466e8fc6c3b91ff6ec0b7cd67581683243e88d012edff3</cites><orcidid>0000-0001-7379-2684 ; 0000-0002-1136-7815</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41561-019-0319-5$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/s41561-019-0319-5$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27922,27923,41486,42555,51317</link.rule.ids></links><search><creatorcontrib>Nilsson-Kerr, K.</creatorcontrib><creatorcontrib>Anand, P.</creatorcontrib><creatorcontrib>Sexton, P. F.</creatorcontrib><creatorcontrib>Leng, M. J.</creatorcontrib><creatorcontrib>Misra, S.</creatorcontrib><creatorcontrib>Clemens, S. C.</creatorcontrib><creatorcontrib>Hammond, S. J.</creatorcontrib><title>Role of Asian summer monsoon subsystems in the inter-hemispheric progression of deglaciation</title><title>Nature geoscience</title><addtitle>Nat. Geosci</addtitle><description>The responses of Asian monsoon subsystems to both hemispheric climate forcing and external orbital forcing are currently issues of vigorous debate. The Indian summer monsoon is the dominant monsoon subsystem in terms of energy flux, constituting one of Earth’s most dynamic expressions of ocean–atmosphere interactions. Yet, the Indian summer monsoon is grossly under-represented in Asian monsoon palaeoclimate records. Here, we present high-resolution records of Indian summer monsoon-induced rainfall and fluvial runoff recovered in a sediment core from the Bay of Bengal across Termination II, 139–127 thousand years ago, including coupled measurements of the oxygen isotopic composition and Mg/Ca, Mn/Ca, Nd/Ca and U/Ca ratios in surface-ocean-dwelling foraminifera. Our data reveal a millennial-scale transient strengthening of the Asian monsoon that punctuates Termination II associated with an oscillation of the bipolar seesaw. The progression of deglacial warming across Termination II emerges first in the Southern Hemisphere, then the tropics in tandem with Indian summer monsoon strengthening, and finally the Northern Hemisphere. We therefore suggest that the Indian summer monsoon was a conduit for conveying Southern Hemisphere latent heat northwards, thereby promoting subsequent Northern Hemisphere deglaciation.
During deglacial warming at Termination II, about 130,000 years ago, the Indian summer monsoon helped convey heat northwards as deglaciation progressed from the Southern to the Northern Hemisphere, according to sediment records from the Bay of Bengal.</description><subject>704/106/2738</subject><subject>704/106/413</subject><subject>Asian monsoons</subject><subject>Calcium</subject><subject>Deglaciation</subject><subject>Earth</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Earth System Sciences</subject><subject>Energy flux</subject><subject>Energy transfer</subject><subject>Foraminifera</subject><subject>Geochemistry</subject><subject>Geology</subject><subject>Geophysics/Geodesy</subject><subject>Interactions</subject><subject>Isotope composition</subject><subject>Isotopes</subject><subject>Latent heat</subject><subject>Magnesium</subject><subject>Manganese</subject><subject>Meltwater</subject><subject>Monsoon climates</subject><subject>Monsoon rainfall</subject><subject>Monsoons</subject><subject>Northern Hemisphere</subject><subject>Ocean currents</subject><subject>Oceans</subject><subject>Oxygen</subject><subject>Palaeoclimate</subject><subject>Paleoclimate</subject><subject>Rain</subject><subject>Rainfall</subject><subject>Ratios</subject><subject>Records</subject><subject>Runoff</subject><subject>Southern Hemisphere</subject><subject>Subsystems</subject><subject>Summer</subject><subject>Summer monsoon</subject><subject>Tropical environments</subject><subject>Wind</subject><issn>1752-0894</issn><issn>1752-0908</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kMtqwzAQRUVpoenjA7ozdK1WY9mytAyhLwgUSrsrCFseJQ6xlWqcRf6-Cm7pqpt5wLl3hsvYDYg7EFLfUwGlAi7AcCFTKU_YDKoy58IIffo7a1OcswuijRBKFFU5Y59vYYtZ8NmcunrIaN_3GLM-DBTCcW3oQCP2lHVDNq4xtREjX2Pf0W6NsXPZLoZVRKIu8cmnxdW2dl09pv2Knfl6S3j90y_Zx-PD--KZL1-fXhbzJa-LQo9caqjSl947AK09NnlZKIXaO-VkY8B7hU40lWtVVWpQWuaFRK1bATm23stLdjv5pl--9kij3YR9HNJJm4MxYFIsIlEwUS4Gooje7mLX1_FgQdhjiHYK0SbaHkO0ZdLkk4YSO6ww_jn_L_oGL-Z1wQ</recordid><startdate>20190401</startdate><enddate>20190401</enddate><creator>Nilsson-Kerr, K.</creator><creator>Anand, P.</creator><creator>Sexton, P. 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F.</au><au>Leng, M. J.</au><au>Misra, S.</au><au>Clemens, S. C.</au><au>Hammond, S. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Role of Asian summer monsoon subsystems in the inter-hemispheric progression of deglaciation</atitle><jtitle>Nature geoscience</jtitle><stitle>Nat. Geosci</stitle><date>2019-04-01</date><risdate>2019</risdate><volume>12</volume><issue>4</issue><spage>290</spage><epage>295</epage><pages>290-295</pages><issn>1752-0894</issn><eissn>1752-0908</eissn><abstract>The responses of Asian monsoon subsystems to both hemispheric climate forcing and external orbital forcing are currently issues of vigorous debate. The Indian summer monsoon is the dominant monsoon subsystem in terms of energy flux, constituting one of Earth’s most dynamic expressions of ocean–atmosphere interactions. Yet, the Indian summer monsoon is grossly under-represented in Asian monsoon palaeoclimate records. Here, we present high-resolution records of Indian summer monsoon-induced rainfall and fluvial runoff recovered in a sediment core from the Bay of Bengal across Termination II, 139–127 thousand years ago, including coupled measurements of the oxygen isotopic composition and Mg/Ca, Mn/Ca, Nd/Ca and U/Ca ratios in surface-ocean-dwelling foraminifera. Our data reveal a millennial-scale transient strengthening of the Asian monsoon that punctuates Termination II associated with an oscillation of the bipolar seesaw. The progression of deglacial warming across Termination II emerges first in the Southern Hemisphere, then the tropics in tandem with Indian summer monsoon strengthening, and finally the Northern Hemisphere. We therefore suggest that the Indian summer monsoon was a conduit for conveying Southern Hemisphere latent heat northwards, thereby promoting subsequent Northern Hemisphere deglaciation.
During deglacial warming at Termination II, about 130,000 years ago, the Indian summer monsoon helped convey heat northwards as deglaciation progressed from the Southern to the Northern Hemisphere, according to sediment records from the Bay of Bengal.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/s41561-019-0319-5</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0001-7379-2684</orcidid><orcidid>https://orcid.org/0000-0002-1136-7815</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 704/106/2738 704/106/413 Asian monsoons Calcium Deglaciation Earth Earth and Environmental Science Earth Sciences Earth System Sciences Energy flux Energy transfer Foraminifera Geochemistry Geology Geophysics/Geodesy Interactions Isotope composition Isotopes Latent heat Magnesium Manganese Meltwater Monsoon climates Monsoon rainfall Monsoons Northern Hemisphere Ocean currents Oceans Oxygen Palaeoclimate Paleoclimate Rain Rainfall Ratios Records Runoff Southern Hemisphere Subsystems Summer Summer monsoon Tropical environments Wind |
| title | Role of Asian summer monsoon subsystems in the inter-hemispheric progression of deglaciation |
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