Late-Holocene climate in the Lower Narmada valley, Gujarat, western India, inferred using sedimentary carbon and oxygen isotope ratios
Bibliographic Data
| ID | 12267476 |
|---|---|
| Authors | AH Laskar (Physical Research Laboratory, corresponding author), M G Yadava (National Sun Yat-sen University), MG Yadava (National Sun Yat-sen University, Taiwan), Neera Sharma (0000-0002-2800-4690, Maharaja Sayajirao University of Baroda), R Ramesh (0000-0003-2471-7746, Physical Research Laboratory) |
| Year | 2013 |
| Volume | 23 |
| Issue | 8 |
| Pages | 1115-1122 |
| Publication date | 2013-04-24 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1177/0959683613483621 |
| OpenAlex | W2053983036 |
| Language | EN |
| Citations received | 13 |
| References cited | 50 |
We report the late-Holocene climate and vegetation of the Lower Narmada valley, Gujarat, western India as inferred from the stable carbon and oxygen isotopic composition (δ 13 C and δ 18 O) of sedimentary carbonates and the associated organic carbon. The alluvial plain from the surface to a depth of ~2 m consists of late-Holocene sediments, deposited during last ~3 kyr, probably by large historic and paleofloods. δ 13 C of both carbonates and organic carbon in the sediments suggest that climate was subhumid throughout the late Holocene (~ 3 kyr) as it is today, and the vegetation was of mixed C 3 -C 4 type with little change in their relative proportions. The modern vegetation mostly comprises shrubs and scattered woody plants (C 3 ) with a little grass (C 4 ) in some places. The recent change in vegetation is attributable to anthropogenic disturbance: the natural grasslands (C 4 ) are replaced by shrubs and woody plants (C 3 ). Two comparatively drier events at ~2.1 ka and ~1.3 ka are observed, consistent with widespread proxy paleoclimatic records and are attributed to a weaker southwest monsoon rain. Marine influence on the isotopic compositions is observed in a cliff section of the Narmada estuary throughout its depositional history of ~4.2 kyr. The radiocarbon ages of the sediments are of the order of decades to a century at the surface and increase almost linearly with depth, being 1000–3000 yr at ~100 cm and 3200–4200 yr at ~200 cm
Alluvium · Climate change · Geography · Holocene · Holocene climatic optimum · Isotopes of carbon · Paleoclimatology · Physical geography · Radiocarbon dating · Sedimentary depositional environment · Sedimentary rock · Structural basin · Total organic carbon · Vegetation (pathology · Geological formations and processes · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Ecology · Geology · Oceanography · Paleontology
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| Citations per year | 1.08 |
|---|---|
| Citation span | 2014 - 2026 (13) |
| Highly cited | No |