Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database
We assembled a database of Holocene relative sea-level index points (n = 213) and marine (n = 211) and terrestrial (n = 122) limiting points for the broader South and Southeast Asian region including the Maldives, India and Sri Lanka. The standardized review of published age-elevation information fr...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/83069 http://hdl.handle.net/10220/49737 |
| _version_ | 1826119972350328832 |
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| author | Mann, Thomas Bender, Maren Lorscheid, Thomas Stocchi, Paolo Vacchi, Matteo Rovere, Alessio Switzer, Adam Douglas |
| author2 | Asian School of the Environment |
| author_facet | Asian School of the Environment Mann, Thomas Bender, Maren Lorscheid, Thomas Stocchi, Paolo Vacchi, Matteo Rovere, Alessio Switzer, Adam Douglas |
| author_sort | Mann, Thomas |
| collection | NTU |
| description | We assembled a database of Holocene relative sea-level index points (n = 213) and marine (n = 211) and terrestrial (n = 122) limiting points for the broader South and Southeast Asian region including the Maldives, India and Sri Lanka. The standardized review of published age-elevation information from corals, deltaic, estuarine and mangrove deposits, beachrocks and tidal notches, yielded a new suite of relative sea-level index and limiting points produced according to a standardized protocol. Expected spatial variability in Holocene relative sea-level change due to glacial isostatic adjustment was accounted for, by first subdividing the study area into ten geographic sub-regions from the Central Indian Ocean to the Western Tropical Pacific, and second by comparing sub-regional relative sea-level data to model predictions of glacial isostatic adjustment. Results show that some of the regionally constrained relative sea-level data are characterized by significant inconsistencies that cannot be explained by glacial isostatic adjustment. Such inconsistencies of standardized relative sea-level data become particularly obvious in areas around the Red River Delta in Vietnam, the Gulf of Thailand, the northwest coast of Malaysia and the Spermonde Archipelago in Indonesia. Based on a critical evaluation of the reviewed relative sea-level indicators, we discuss possible sources of local divergence and identify regions where data are currently insufficient to constrain glacial isostatic adjustment predictions. The remaining quality-controlled and consistent relative sea-level data show that glacial isostatic adjustment and syn-/post-formational influences such as tectonic uplift, subsidence and compaction were the dominant local drivers of Holocene relative sea-level change. Collectively, the results of this review suggest that Holocene sea levels in South and Southeast Asia and surrounding regions have been controlled by a variety of global and local drivers and imply that additional index points from the Java Sea in Indonesia would be valuable to better assess the spatial variability, and to calibrate geophysical models of glacial isostatic adjustment. |
| first_indexed | 2024-10-01T05:08:54Z |
| format | Journal Article |
| id | ntu-10356/83069 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:08:54Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/830692020-09-26T21:30:22Z Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database Mann, Thomas Bender, Maren Lorscheid, Thomas Stocchi, Paolo Vacchi, Matteo Rovere, Alessio Switzer, Adam Douglas Asian School of the Environment Earth Observatory of Singapore Sea-level Highstand Science::Geology Glacial Isostatic Adjustment We assembled a database of Holocene relative sea-level index points (n = 213) and marine (n = 211) and terrestrial (n = 122) limiting points for the broader South and Southeast Asian region including the Maldives, India and Sri Lanka. The standardized review of published age-elevation information from corals, deltaic, estuarine and mangrove deposits, beachrocks and tidal notches, yielded a new suite of relative sea-level index and limiting points produced according to a standardized protocol. Expected spatial variability in Holocene relative sea-level change due to glacial isostatic adjustment was accounted for, by first subdividing the study area into ten geographic sub-regions from the Central Indian Ocean to the Western Tropical Pacific, and second by comparing sub-regional relative sea-level data to model predictions of glacial isostatic adjustment. Results show that some of the regionally constrained relative sea-level data are characterized by significant inconsistencies that cannot be explained by glacial isostatic adjustment. Such inconsistencies of standardized relative sea-level data become particularly obvious in areas around the Red River Delta in Vietnam, the Gulf of Thailand, the northwest coast of Malaysia and the Spermonde Archipelago in Indonesia. Based on a critical evaluation of the reviewed relative sea-level indicators, we discuss possible sources of local divergence and identify regions where data are currently insufficient to constrain glacial isostatic adjustment predictions. The remaining quality-controlled and consistent relative sea-level data show that glacial isostatic adjustment and syn-/post-formational influences such as tectonic uplift, subsidence and compaction were the dominant local drivers of Holocene relative sea-level change. Collectively, the results of this review suggest that Holocene sea levels in South and Southeast Asia and surrounding regions have been controlled by a variety of global and local drivers and imply that additional index points from the Java Sea in Indonesia would be valuable to better assess the spatial variability, and to calibrate geophysical models of glacial isostatic adjustment. Published version 2019-08-21T09:04:44Z 2019-12-06T15:11:11Z 2019-08-21T09:04:44Z 2019-12-06T15:11:11Z 2019 Journal Article Mann, T., Bender, M., Lorscheid, T., Stocchi, P., Vacchi, M., Switzer, A. D., & Rovere, A. (2019). Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database. Quaternary Science Reviews, 219, 112-125. doi:10.1016/j.quascirev.2019.07.007 0277-3791 https://hdl.handle.net/10356/83069 http://hdl.handle.net/10220/49737 10.1016/j.quascirev.2019.07.007 en Quaternary Science Reviews © 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). 14 p. application/pdf |
| spellingShingle | Sea-level Highstand Science::Geology Glacial Isostatic Adjustment Mann, Thomas Bender, Maren Lorscheid, Thomas Stocchi, Paolo Vacchi, Matteo Rovere, Alessio Switzer, Adam Douglas Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title | Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title_full | Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title_fullStr | Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title_full_unstemmed | Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title_short | Holocene sea levels in southeast Asia, Maldives, India and Sri Lanka : the SEAMIS database |
| title_sort | holocene sea levels in southeast asia maldives india and sri lanka the seamis database |
| topic | Sea-level Highstand Science::Geology Glacial Isostatic Adjustment |
| url | https://hdl.handle.net/10356/83069 http://hdl.handle.net/10220/49737 |
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