Tropical Rainforest Dynamics and Palaeoclimate Implications since the late Pleistocene, Nilgiris, India
Bibliographic Data
| ID | 24085777 |
|---|---|
| Authors | Priyanka Raja (Anna University, Chennai), Hema Achyuthan (0000-0001-5495-4115, Anna University, Chennai, corresponding author), Anjum Farooqui (0000-0002-6142-9164, Birbal Sahni Institute of Palaeosciences), Rengaswamy Ramesh (National Institute of Science Education and Research), Pankaj Kumar (0000-0002-5625-8145, Inter-University Accelerator Centre), Sundeep Chopra (Inter-University Accelerator Centre) |
| Year | 2019 |
| Volume | 91 |
| Issue | 1 |
| Pages | 367-382 |
| Publication date | 2019-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Quaternary Research (JOURNAL) |
| Journal identifiers | ISSN: 0033-5894 • E-ISSN: 1096-0287 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/qua.2018.58 |
| OpenAlex | W2901215376 |
| Language | EN |
| Citations received | 4 |
| References cited | 80 |
A multiproxy study involving sedimentology, palynology, radiocarbon dating, stable isotopes, and geochemistry was carried out on the Parsons Valley Lake deposit, Nilgiris, India, to determine palaeoclimatic fluctuations and their possible impact on vegetation since the late Pleistocene. The 72-cm-deep sediment core that was retrieved reveals five distinct palaeoclimatic phases: (1) Warm and humid conditions with a high lake stand before the last glacial maximum (LGM; ~29,800 cal yr BP), subsequently changing to a relatively cool and dry phase during the LGM. (2) Considerable dry conditions and lower precipitation occurred between ~16,300 and 9500 cal yr BP. During this period, the vegetation shrank and perhaps was confined to moister pockets or was a riparian forest cover. (3) An outbreak in the shift of monsoonal precipitation was witnessed in the beginning of the mid-Holocene, around 8400 cal yr BP, implying alteration in the shift toward warm and humid conditions, resulting in relatively high pollen abundance for evergreen taxa. (4) This phase exhibits a shift to heavier δ 13 C values around ~1850 cal yr BP, with an emergence of moist deciduous plants pointing to drier conditions. (5) Human activities contributed to the exceedingly high percentage of Acacia and Pinus pollen during the Little Ice Age.
Climatology · Geography · Holocene · Last Glacial Maximum · Monsoon · Palynology · Physical geography · Pleistocene · Pollen · Precipitation · Radiocarbon dating · Vegetation (pathology) · Coastal wetland ecosystem dynamics · Ecology · Geological formations and processes · Geology · Geology and Paleoclimatology Research · Paleontology
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| Unique citing works | 4 |
|---|---|
| Citations per year | 0,67 |
| Citation span | 2020 - 2026 (7) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 4 |