SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP)
Despite its importance, sea surface paleoproductivity of the western Savu Strait is not well studied. Results from previous studies at the nearby Southwest Sumba and Sumba Strait might not be applicable due to the oceanographic difference. Foraminiferal proxies from gravity core ST10 were applied to...
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| Format: | Article |
| Language: | English |
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Faculty of Mining, Geology and Petroleum Engineering
2023-01-01
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| Series: | Rudarsko-geološko-naftni Zbornik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/427380 |
| _version_ | 1797206490118881280 |
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| author | Ryan Dwi Wahyu Ardi Aswan Aswan Khoiril Anwar Maryunani Eko Yulianto Purna Sulastya Putra Septriono Hari Nugroho |
| author_facet | Ryan Dwi Wahyu Ardi Aswan Aswan Khoiril Anwar Maryunani Eko Yulianto Purna Sulastya Putra Septriono Hari Nugroho |
| author_sort | Ryan Dwi Wahyu Ardi |
| collection | DOAJ |
| description | Despite its importance, sea surface paleoproductivity of the western Savu Strait is not well studied. Results from previous studies at the nearby Southwest Sumba and Sumba Strait might not be applicable due to the oceanographic difference. Foraminiferal proxies from gravity core ST10 were applied to generate sea surface paleoproductivity and thermocline depth reconstruction. Foraminiferal Accumulation Rate and Benthic Foraminiferal Accumulation Rate were used as paleoproductivity proxies while the thermocline dwellers’ relative abundance was applied as the thermocline depth proxy. This study suggested paleoproductivity increase during the Last Glacial Maximum (LGM)–~16 ka BP and Holocene (after ~11.65 ka BP) in the western Savu Strait. Thermocline depth was relatively shallower during the LGM–Last Deglaciation and became deeper afterwards. Paleoproductivity increase at LGM–~16 ka BP was caused by the Australian-Indonesian winter monsoon (AIWM)-like condition, characterized by intense coastal upwelling while the Holocene paleoproductivity increase was related to the abrupt rainfall increase which enhanced terrestrial/riverine input. Thermocline depth variability in the western Savu Strait is in-phase with thermocline depth variability in the Java upwelling region, characterized by a shallower thermocline during the LGM–Last Deglaciation (before ~11.65 ka BP) and a deeper thermocline during the Holocene (after ~11.65 ka BP). This thermocline depth shifting indicates a strong Australian-Indonesian Monsoon (AIM) influence on the paleoceanography of the western Savu Strait since LGM. |
| first_indexed | 2024-04-24T09:07:50Z |
| format | Article |
| id | doaj.art-0496c414dccb419ba5a720d6f55500ab |
| institution | Directory Open Access Journal |
| issn | 0353-4529 1849-0409 |
| language | English |
| last_indexed | 2024-04-24T09:07:50Z |
| publishDate | 2023-01-01 |
| publisher | Faculty of Mining, Geology and Petroleum Engineering |
| record_format | Article |
| series | Rudarsko-geološko-naftni Zbornik |
| spelling | doaj.art-0496c414dccb419ba5a720d6f55500ab2024-04-15T18:19:58ZengFaculty of Mining, Geology and Petroleum EngineeringRudarsko-geološko-naftni Zbornik0353-45291849-04092023-01-0138116717810.17794/rgn.2023.1.14SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP)Ryan Dwi Wahyu Ardi0Aswan Aswan1Khoiril Anwar Maryunani2Eko Yulianto3Purna Sulastya Putra4Septriono Hari Nugroho5Geological Engineering Study Program, Faculty of Earth Science and Technology, Institut Teknologi Bandung, BandungGeological Engineering Study Program, Faculty of Earth Science and Technology, Institut Teknologi Bandung, BandungGeological Engineering Study Program, Faculty of Earth Science and Technology, Institut Teknologi Bandung, BandungResearch Centre for Geological Disaster, National Research and Innovation Agency, Jl. Sangkuriang BandungGeological Engineering Study Program, Faculty of Earth Science and Technology, Institut Teknologi Bandung, BandungGeological Engineering Study Program, Faculty of Earth Science and Technology, Institut Teknologi Bandung, BandungDespite its importance, sea surface paleoproductivity of the western Savu Strait is not well studied. Results from previous studies at the nearby Southwest Sumba and Sumba Strait might not be applicable due to the oceanographic difference. Foraminiferal proxies from gravity core ST10 were applied to generate sea surface paleoproductivity and thermocline depth reconstruction. Foraminiferal Accumulation Rate and Benthic Foraminiferal Accumulation Rate were used as paleoproductivity proxies while the thermocline dwellers’ relative abundance was applied as the thermocline depth proxy. This study suggested paleoproductivity increase during the Last Glacial Maximum (LGM)–~16 ka BP and Holocene (after ~11.65 ka BP) in the western Savu Strait. Thermocline depth was relatively shallower during the LGM–Last Deglaciation and became deeper afterwards. Paleoproductivity increase at LGM–~16 ka BP was caused by the Australian-Indonesian winter monsoon (AIWM)-like condition, characterized by intense coastal upwelling while the Holocene paleoproductivity increase was related to the abrupt rainfall increase which enhanced terrestrial/riverine input. Thermocline depth variability in the western Savu Strait is in-phase with thermocline depth variability in the Java upwelling region, characterized by a shallower thermocline during the LGM–Last Deglaciation (before ~11.65 ka BP) and a deeper thermocline during the Holocene (after ~11.65 ka BP). This thermocline depth shifting indicates a strong Australian-Indonesian Monsoon (AIM) influence on the paleoceanography of the western Savu Strait since LGM.https://hrcak.srce.hr/file/427380Australian-Indonesian monsoonforaminiferal accumulation rateIndonesian ThroughflowpaleoproductivitySavu Strait |
| spellingShingle | Ryan Dwi Wahyu Ardi Aswan Aswan Khoiril Anwar Maryunani Eko Yulianto Purna Sulastya Putra Septriono Hari Nugroho SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) Rudarsko-geološko-naftni Zbornik Australian-Indonesian monsoon foraminiferal accumulation rate Indonesian Throughflow paleoproductivity Savu Strait |
| title | SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) |
| title_full | SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) |
| title_fullStr | SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) |
| title_full_unstemmed | SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) |
| title_short | SEA SURFACE PALEOPRODUCTIVITY RECONSTRUCTION BASED ON FORAMINIFERAL ACCUMULATION RATE IN THE WESTERN SAVU STRAIT SINCE THE LAST GLACIAL MAXIMUM (~23 KA BP) |
| title_sort | sea surface paleoproductivity reconstruction based on foraminiferal accumulation rate in the western savu strait since the last glacial maximum 23 ka bp |
| topic | Australian-Indonesian monsoon foraminiferal accumulation rate Indonesian Throughflow paleoproductivity Savu Strait |
| url | https://hrcak.srce.hr/file/427380 |
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