Abyssal oceanic circulation and acidification during the Middle Eocene Climatic Optimum (MECO)
The Middle Eocene Climatic Optimum (MECO) is a global warming event that occurred at around 40 Ma and lasted about 500 kyr. We study this event in an abyssal setting of the Tasman Sea, using the IODP Core U1511B-16R, collected during the expedition 371. We analyse magnetic, mineralogical, and chemic...
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| Veröffentlicht in: | Scientific reports 2020-04, Vol.10 (1), p.6674, Article 6674 |
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| description | The Middle Eocene Climatic Optimum (MECO) is a global warming event that occurred at around 40 Ma and lasted about 500 kyr. We study this event in an abyssal setting of the Tasman Sea, using the IODP Core U1511B-16R, collected during the expedition 371. We analyse magnetic, mineralogical, and chemical parameters to investigate the evolution of the sea bottom conditions at this site during the middle Eocene. We observe significant changes indicating the response to the MECO perturbation. Mn oxides, in which Mn occurs under an oxidation state around +4, indicate a high
Eh
water environment. A prominent Mn anomaly, occurring just above the MECO interval, indicates a shift toward higher
pH
conditions shortly after the end of this event. Our results suggest more acid bottom water over the Tasman abyssal plain during the MECO, and an abrupt end of these conditions. This work provides the first evidence of MECO at abyssal depths and shows that acidification affected the entire oceanic water column during this event. |
| doi_str_mv | 10.1038/s41598-020-63525-3 |
| format | Article |
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Eh
water environment. A prominent Mn anomaly, occurring just above the MECO interval, indicates a shift toward higher
pH
conditions shortly after the end of this event. Our results suggest more acid bottom water over the Tasman abyssal plain during the MECO, and an abrupt end of these conditions. This work provides the first evidence of MECO at abyssal depths and shows that acidification affected the entire oceanic water column during this event.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-020-63525-3</identifier><identifier>PMID: 32317709</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>704/106 ; 704/106/2738 ; 704/106/413 ; 704/829 ; 704/829/827 ; Abyssal circulation ; Acidification ; Bottom water ; Climate change ; Eocene ; Global warming ; Humanities and Social Sciences ; multidisciplinary ; Oxidation ; Science ; Science (multidisciplinary) ; Water column</subject><ispartof>Scientific reports, 2020-04, Vol.10 (1), p.6674, Article 6674</ispartof><rights>The Author(s) 2020</rights><rights>The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a534t-e35bbc65d3a5e0c7b601dbb8e317386fbb44ba38902748b3dc72adb9bc1cda093</citedby><cites>FETCH-LOGICAL-a534t-e35bbc65d3a5e0c7b601dbb8e317386fbb44ba38902748b3dc72adb9bc1cda093</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7174310/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7174310/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,27901,27902,41096,42165,51551,53766,53768</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32317709$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Cornaggia, Flaminia</creatorcontrib><creatorcontrib>Bernardini, Simone</creatorcontrib><creatorcontrib>Giorgioni, Martino</creatorcontrib><creatorcontrib>Silva, Gabriel L. X.</creatorcontrib><creatorcontrib>Nagy, André Istvan M.</creatorcontrib><creatorcontrib>Jovane, Luigi</creatorcontrib><title>Abyssal oceanic circulation and acidification during the Middle Eocene Climatic Optimum (MECO)</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>The Middle Eocene Climatic Optimum (MECO) is a global warming event that occurred at around 40 Ma and lasted about 500 kyr. We study this event in an abyssal setting of the Tasman Sea, using the IODP Core U1511B-16R, collected during the expedition 371. We analyse magnetic, mineralogical, and chemical parameters to investigate the evolution of the sea bottom conditions at this site during the middle Eocene. We observe significant changes indicating the response to the MECO perturbation. Mn oxides, in which Mn occurs under an oxidation state around +4, indicate a high
Eh
water environment. A prominent Mn anomaly, occurring just above the MECO interval, indicates a shift toward higher
pH
conditions shortly after the end of this event. Our results suggest more acid bottom water over the Tasman abyssal plain during the MECO, and an abrupt end of these conditions. 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X.</au><au>Nagy, André Istvan M.</au><au>Jovane, Luigi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Abyssal oceanic circulation and acidification during the Middle Eocene Climatic Optimum (MECO)</atitle><jtitle>Scientific reports</jtitle><stitle>Sci Rep</stitle><addtitle>Sci Rep</addtitle><date>2020-04-21</date><risdate>2020</risdate><volume>10</volume><issue>1</issue><spage>6674</spage><pages>6674-</pages><artnum>6674</artnum><issn>2045-2322</issn><eissn>2045-2322</eissn><abstract>The Middle Eocene Climatic Optimum (MECO) is a global warming event that occurred at around 40 Ma and lasted about 500 kyr. We study this event in an abyssal setting of the Tasman Sea, using the IODP Core U1511B-16R, collected during the expedition 371. We analyse magnetic, mineralogical, and chemical parameters to investigate the evolution of the sea bottom conditions at this site during the middle Eocene. We observe significant changes indicating the response to the MECO perturbation. Mn oxides, in which Mn occurs under an oxidation state around +4, indicate a high
Eh
water environment. A prominent Mn anomaly, occurring just above the MECO interval, indicates a shift toward higher
pH
conditions shortly after the end of this event. Our results suggest more acid bottom water over the Tasman abyssal plain during the MECO, and an abrupt end of these conditions. This work provides the first evidence of MECO at abyssal depths and shows that acidification affected the entire oceanic water column during this event.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>32317709</pmid><doi>10.1038/s41598-020-63525-3</doi><oa>free_for_read</oa></addata></record> |
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| subjects | 704/106 704/106/2738 704/106/413 704/829 704/829/827 Abyssal circulation Acidification Bottom water Climate change Eocene Global warming Humanities and Social Sciences multidisciplinary Oxidation Science Science (multidisciplinary) Water column |
| title | Abyssal oceanic circulation and acidification during the Middle Eocene Climatic Optimum (MECO) |
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