Tropical Rainforest Dynamics and Palaeoclimate Implications since the late Pleistocene, Nilgiris, India

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

• Decline of Dholavira Urban Settlement of Harappan Civilization in Kachchh was Associated with Global Climate Change Rather than the Decline of any Major Fluvial System

  Open Access•Mamata Ngangom, M G Thakkar•Rivers of India•2024

  Incluir item

• Paleovegetation dynamics in an alternative stable states landscape in the montane Western Ghats, India

  Open Access•Prabhakaran Ramya Bala, Sarath Pullyottum Kavil et al.•The Holocene•2021

  Incluir item

• Inter-University Accelerator Centre, New Delhi (Iuacd) Radiocarbon Date List I

  Open Access•Rajveer Sharma, Pankaj Kumar et al.•Radiocarbon•2020

  Incluir item

• Late Holocene geochemical and environmental changes inferred from a multiproxy investigation in sediments from Kondagai Lake Tamil Nadu, India

  Open Access•Anand Rajoriya, Pooja Tiwari et al.•The Holocene•2026

  Incluir item

• Late Pleistocene and Holocene Vegetation and Climate on the Taymyr Lowland, Northern Siberia

  Open Access•Andrei Andreev, Andrei A Andreev et al.•Quaternary Research•2002

  Incluir item

• The East Asian Monsoon During MIS 2 Expressed in a Speleothem δ 18 O Record From Jintanwan Cave, Hunan, China

  Open Access•Jason Cosford, Hairuo Qing et al.•Quaternary Research•2010

  Incluir item

• Late Quaternary climatic control on erosion and weathering in the eastern Tibetan Plateau and the Mekong Basin

  Open Access•Zhifei Liu, Christophe Colin et al.•Quaternary Research•2005

  Incluir item

• Abrupt changes in the Asian southwest monsoon during the Holocene and their links to the North Atlantic Ocean

  Open Access•Anil K Gupta, David M Anderson et al.•Nature•2003

  Incluir item

• Holocene ITCZ and Indian monsoon dynamics recorded in stalagmites from Oman and Yemen (Socotra)

  Open Access•Dominik Fleitmann, Stephen J Burns et al.•Quaternary Science Reviews•2007

  Incluir item

• Variability of El Niño/Southern Oscillation activity at millennial timescales during the Holocene epoch

  Open Access•Christopher M Moy, Geoffrey O Seltzer et al.•Nature•2002

  Incluir item

• The southwest Indian Monsoon over the last 18 000 years

  Open Access•Jonathan T Overpeck, Jonathan Overpeck et al.•Climate Dynamics•1996

  Incluir item

• Migrations and dynamics of the intertropical convergence zone

  Open Access•Tapio Schneider, Tobias Bischoff et al.•Nature•2014

  Incluir item

• Southward Migration of the Intertropical Convergence Zone Through the Holocene

  Open Access•Gerald H Haug, Konrad A Hughen et al.•Science•2001

  Incluir item

• Influence of the intertropical convergence zone on the East Asian monsoon

  Open Access•Gergana Yancheva, Norbert R Nowaczyk et al.•Nature•2007

  Incluir item

• A revolutionary graphitisation system

  Open Access•Lukas Wacker, Mojmír Němec et al.•Nuclear Instruments and Methods…•2010

  Incluir item

• The Last Glacial Maximum

  Open Access•Peter U Clark, Arthur S Dyke et al.•Science•2009

  Incluir item

• Century-scale events in monsoonal climate over the past 24,000 years

  Open Access•Frank Sirocko, Michael Sarnthein et al.•Nature•1993

  Incluir item

• Mid- to Late Holocene climate change

  Open Access•Heinz Wanner, Jürg Beer et al.•Quaternary Science Reviews•2008

  Incluir item

• The Indian Monsoon and Its Variability

  Sulochana Gadgil•Annual Review of Earth and…•2003

  Incluir item

• Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records

  Open Access•Mike Walker, Sigfús Johnsen et al.•Journal of Quaternary Science•2009

  Incluir item

• Long-Term Variations of Caloric Insolation Resulting from the Earth's Orbital Elements

  Open Access•André Berger, André L Berger•Quaternary Research•1978

  Incluir item

• Biodiversity hotspots for conservation priorities

  Open Access•Norman Myers, Russell A Mittermeier et al.•Nature•2000

  Incluir item

• Elemental (C/N ratios) and isotopic (δ 15 N org , δ 13 C org ) compositions of sedimentary organic matter from a high-altitude mountain lake (Meidsee, 2661 m a.s.l., Switzerland)

  Open Access•Florian Thevenon, Thierry Adatte et al.•The Holocene•2012

  Incluir item

• Will seasonally dry tropical forests be sensitive or resistant to future changes in rainfall regimes

  Open Access•Kara Allen, Juan Manuel Dupuy et al.•Environmental Research Letters•2017

  Incluir item

• Tropical rainforest vegetation, climate and sea level during the Pleistocene in Kerala, India

  Open Access•Anjum Farooqui, J G Ray et al.•Quaternary International•2010

  Incluir item

• The Medieval Quiet Period

  Open Access•Raymond S Bradley, Heinz Wanner et al.•The Holocene•2016

  Incluir item

• Spatial heterogeneity of land cover response to climatic change in the Nilgiri highlands (Southern India) since the last glacial maximum

  Open Access•Laurent Caner, Danny Lo Seen et al.•The Holocene•2007

  Incluir item

• Global changes in the perspective of the past

  Open Access•Richard Washington•Global Environmental Change•1996

  Incluir item