dc.contributor.author | Sarathchandraprasad, T. | |
dc.contributor.author | Banakar, V.K. | |
dc.date.accessioned | 2019/03/31 | |
dc.date.accessioned | 2019-04-30T12:44:23Z | |
dc.date.available | 2018/10/05 | |
dc.date.available | 2019-04-30T12:44:23Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Current Science, vol.114(9); 2018; 1940-1946 | |
dc.identifier.issn | 0011-3891 | |
dc.identifier.uri | https://doi.org/10.18520/cs/v114/i09/1934-1940 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/8055 | |
dc.description.abstract | The discharge of terrigenous clastics by seasonal peninsular rivers is known to reach the upper slope of the eastern margin of India, which is presently impinged by the monsoon-sensitive intense oxygen minimum zone (OMZ); however, their mutual behaviour in response to changes in the intensity of past Indian summer monsoons (ISM) is not clear. The -18O (G.sacculifer) time-series of a sediment core from the upper slope off Chennai exhibits distinct enrichment (~0.4‰) during the last glacial period (30-18 kiloyears BP: ka), and depletion (~-2.2‰) during the Holocene, suggesting a significant shift in ISM intensity. The monotonously increased terrigenous elements (Al, Ti and Mg) content and depleted - 18O (G.sacculifer) during the Holocene suggest tight-coupling between ISM and terrigenous sediment input. Highly depleted redoxsensitive Mn (<0.04%) (lesser than the source sediment content of 0.07%) throughout the last 42 kyr suggests well-sustained intense OMZ irrespective of ISM variation. | |
dc.language | en | |
dc.publisher | Current Science Association & Indian Academy of Sciences | |
dc.relation.isreferencedby | SCI | |
dc.rights | Creative commons | |
dc.title | Last 42 ky sediment chemistry of oxygen deficient coastal region of the Bay of Bengal: implications for terrigenous input and monsoon variability | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |