Show simple item record

dc.contributor.authorMiriyala, P.
dc.contributor.authorSukumaran, N.P.
dc.contributor.authorNath, B.N.
dc.contributor.authorRamamurty, P.B.
dc.contributor.authorSijinkumar, A.V.
dc.contributor.authorVijayagopal, B.
dc.contributor.authorRamaswamy, V.
dc.contributor.authorSebastian, T.
dc.date.accessioned2017-09-22T09:00:46Z
dc.date.available2017-09-22T09:00:46Z
dc.date.issued2017
dc.identifier.citationScientific Reports, vol.7; 2017; No.44310 doi:10.1038/srep44310
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/5114
dc.description.abstractChemical weathering and the ensuing atmospheric carbon dioxide consumption has long been considered to work on geological time periods until recently when some modelling and natural records have shown that the weathering-related CO<sub>2</sub> consumption can change at century to glacial-interglacial time scale. Last glacial to interglacial transition period is a best test case to understand the interplay between Pco<sub>2</sub>-temperature-chemical weathering when a pulse of rapid chemical weathering was initiated. Here we show, from a high resolution 54ka record from the Andaman Sea in the northern Indian Ocean, that the chemical weathering responds to deglacial to mid-Holocene summer monsoon intensification in the Myanmar watersheds. The multi-proxy data (Al/K, CIA, Rb/Sr, <sup>87</sup>Sr/<sup>86</sup>Sr for degree of weathering and <sup>143</sup>Nd/<sup>144</sup>Nd for provenance) reveal an increase in silicate weathering with initiation of interglacial warm climate at ~17.7ka followed by a major change at 15.5ka. Inferred changes in chemical weathering have varied in tandem with the regional monsoonal proxies (δ<sup>18</sup>O<sub>sw</sub>-salinity changes of Northern Indian Ocean, effective Asian moisture content and δ<sup>18</sup>O records of Chinese caves) and are synchronous with changes in summer insolation at 30°N and δ<sup>18</sup>O of GISP2 implying that chemical weathering was not a later amplifier but worked in tandem with global climate change
dc.language.isoen
dc.publisherNature Publishing Group
dc.rightsCopyright [2017]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectChemistry and biogeochemistry
dc.subjectAquatic pollution
dc.subjectMeteorology and climatology
dc.titleIncreased chemical weathering during the deglacial to mid-Holocene summer monsoon intensification
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record