Tropical sea-surface temperature reconstruction for the early Paleogene using Mg/Ca ratios of planktonic foraminifera
To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea‐surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca‐based study of pre‐Quaternary SST and investigate early Paleogene (...
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| Veröffentlicht in: | Paleoceanography 2003-12, Vol.18 (4), p.np-n/a |
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| creator | Tripati, Aradhna K. Delaney, Margaret L. Zachos, James C. Anderson, Linda D. Kelly, Daniel C. Elderfield, Harry |
| description | To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea‐surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca‐based study of pre‐Quaternary SST and investigate early Paleogene (late Paleocene through late middle Eocene; 58.6–39.8 Ma) tropical temperatures, using planktonic foraminifera belonging to the genus Morozovella from Ocean Drilling Program Site 865 on Allison Guyot (western central equatorial Pacific Ocean). Calcification temperatures similar to or warmer than modern tropical SST are calculated using a range of assumptions regarding diagenesis, temperature calibration, and seawater Mg/Ca. Long‐term warming is observed into the early Eocene (54.8–49.0 Ma), with peak SST between 51 and 48 Ma and rapid cooling of 4°C beginning at 48 Ma. These findings are inconsistent with the δ18O‐based SST previously estimated for this site. |
| doi_str_mv | 10.1029/2003PA000937 |
| format | Article |
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These findings are inconsistent with the δ18O‐based SST previously estimated for this site.</description><subject>Early Paleogene</subject><subject>Foraminifera</subject><subject>Marine</subject><subject>Mg/Ca</subject><subject>Morozovella</subject><subject>Ocean Drilling Program Site 865</subject><subject>planktonic foraminifera</subject><subject>tropical sea-surface temperatures</subject><issn>0883-8305</issn><issn>1944-9186</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNp9kcFuEzEQhi0EEqFw4wF8QhxYOl7bsX0MEQ1Ioc0hCMTFMt5xMN2st_auIG-PqyDEqZeZy_f9Gs1PyEsGbxm05rIF4LsVABiuHpEFM0I0hunlY7IArXmjOcin5FkpPwGYkEu-IPM-pzF619OCrilzDs4jnfA4YnbTnJFm9GkoU579FNNAQ8p0-oEUXe5PdOd6TAcckM4lDgf66XC5drSaMRWaAh17N9xOaYj-XnTHOMRQg5-TJ8H1BV_83Rfk89X7_fpDs73ZfFyvto0TwEzz3bc6aCNZcCADKulRiTp4Z5SWUsjOMcFBoeNd18pOoEYWlGmXbWBcOn5BXp1zx5zuZiyTPcbisa9XYZqLZUqBVlJU8PXDoGxN_abWsqJvzqjPqZSMwY45Hl0-WQb2vgb7fw0Vb8_4r9jj6UHW7lbbGwbaVKk5S7FM-Puf5PKtXSqupP1yvbH7DVy9u_721QL_A7-HmZ0</recordid><startdate>200312</startdate><enddate>200312</enddate><creator>Tripati, Aradhna K.</creator><creator>Delaney, Margaret L.</creator><creator>Zachos, James C.</creator><creator>Anderson, Linda D.</creator><creator>Kelly, Daniel C.</creator><creator>Elderfield, Harry</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7TN</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>H96</scope></search><sort><creationdate>200312</creationdate><title>Tropical sea-surface temperature reconstruction for the early Paleogene using Mg/Ca ratios of planktonic foraminifera</title><author>Tripati, Aradhna K. ; Delaney, Margaret L. ; Zachos, James C. ; Anderson, Linda D. ; Kelly, Daniel C. ; Elderfield, Harry</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4019-bc28f8951fa05fe75ce745ce3d9785545da14307ea3dd25d4e8e1f79262f135a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Early Paleogene</topic><topic>Foraminifera</topic><topic>Marine</topic><topic>Mg/Ca</topic><topic>Morozovella</topic><topic>Ocean Drilling Program Site 865</topic><topic>planktonic foraminifera</topic><topic>tropical sea-surface temperatures</topic><toplevel>online_resources</toplevel><creatorcontrib>Tripati, Aradhna K.</creatorcontrib><creatorcontrib>Delaney, Margaret L.</creatorcontrib><creatorcontrib>Zachos, James C.</creatorcontrib><creatorcontrib>Anderson, Linda D.</creatorcontrib><creatorcontrib>Kelly, Daniel C.</creatorcontrib><creatorcontrib>Elderfield, Harry</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><jtitle>Paleoceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tripati, Aradhna K.</au><au>Delaney, Margaret L.</au><au>Zachos, James C.</au><au>Anderson, Linda D.</au><au>Kelly, Daniel C.</au><au>Elderfield, Harry</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tropical sea-surface temperature reconstruction for the early Paleogene using Mg/Ca ratios of planktonic foraminifera</atitle><jtitle>Paleoceanography</jtitle><addtitle>Paleoceanography</addtitle><date>2003-12</date><risdate>2003</risdate><volume>18</volume><issue>4</issue><spage>np</spage><epage>n/a</epage><pages>np-n/a</pages><issn>0883-8305</issn><eissn>1944-9186</eissn><abstract>To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea‐surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca‐based study of pre‐Quaternary SST and investigate early Paleogene (late Paleocene through late middle Eocene; 58.6–39.8 Ma) tropical temperatures, using planktonic foraminifera belonging to the genus Morozovella from Ocean Drilling Program Site 865 on Allison Guyot (western central equatorial Pacific Ocean). Calcification temperatures similar to or warmer than modern tropical SST are calculated using a range of assumptions regarding diagenesis, temperature calibration, and seawater Mg/Ca. Long‐term warming is observed into the early Eocene (54.8–49.0 Ma), with peak SST between 51 and 48 Ma and rapid cooling of 4°C beginning at 48 Ma. These findings are inconsistent with the δ18O‐based SST previously estimated for this site.</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2003PA000937</doi><tpages>13</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Free Content; Wiley-Blackwell AGU Digital Library |
| subjects | Early Paleogene Foraminifera Marine Mg/Ca Morozovella Ocean Drilling Program Site 865 planktonic foraminifera tropical sea-surface temperatures |
| title | Tropical sea-surface temperature reconstruction for the early Paleogene using Mg/Ca ratios of planktonic foraminifera |
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