Vegetation and climatic variability in southeastern Madhya Pradesh, India since Mid-Holocene, based on pollen records

Chauhan, M. S.

doi:10.18520/v109/i5/956-965

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…HCO has also been recorded from the bogs in the temperate belt of Kashmir (Dodia et al, 1985), the alpine belt of Marhi in Himachal Pradesh (~8000-3500 yr BP; Bhattacharyya, 1988), Dhakuri peat bog (~6000-4500 cal yr BP; Phadtare, 2000), Tso Kar lake in Ladakh (~6.9-4.8 ka BP; Demske et al, 2009) and Chandra peat bog, Lahaul, Northwestern Himalaya (~6732-3337 cal yr BP; Rawat et al, 2015). From Central India also, this HCO was recorded from Hoshangabad District, Madhya Pradesh (Chauhan and Quamar, 2012;Quamar and Chauhan, 2012), Anuppur District, Madhya Pradesh (Chauhan, 2015) and Koriya District, Chhattisgarh (Quamar and Bera, 2017). In this study, however, the effects of HCO have been found between a time frame of ~ 5297 and 2776 cal yr BP.…”

Section: Inferred Palaeoclimate From Gw Jammu District With Correlation Of Relevant Studiesmentioning

confidence: 93%

Vegetation dynamics in response to climate change from the wetlands of Western Himalaya, India: Holocene Indian summer monsoon variability

Quamar¹

2018

The Holocene

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India’s agricultural output, economy and societal well-being are strappingly dependent on the stability of the southwest summer monsoon precipitation, its variability and extremes. Deviations in the Indian summer monsoon (ISM) precipitation may profoundly impact the agricultural productivity and gross domestic product (GDP) of the country. Understanding the spatiotemporal dynamics of the ISM precipitation during the Holocene is significant in many respects, particularly in terms of human development and establishment of centres of civilisations. Here, pollen records of the variability in ISM precipitation and their interpretation in terms of vegetation and climate change from two wetlands (Gharana and Nanga; Ramsar sites) of the Western Himalaya (India) is presented. The results suggest that between ~8536 and 5296 cal yr BP, mixed conifer/broad-leaved forests occurred in the Jammu region (Gharana Wetland sediment profile) under a cool and dry climate, probably indicating decreased monsoon precipitation. Subsequently, they were succeeded by mixed broad-leaved/conifer forests between ~5296 and 2776 cal yr BP under a warm and humid climate with increased monsoon precipitation, partly corresponding to the Holocene Climate Optimum (HCO). Between ~2776 and 1376 cal yr BP, with more expansion of broad-leaved forest elements in response to a warm and more humid climate the dense mixed broad-leaved/conifer forests came into existence in the region, indicating a further increase in monsoon precipitation. From ~1376 cal yr BP to present, the climate deteriorated, as manifested by the replacement of dense mixed broad-leaved/conifer forests by mixed conifer/broad-leaved forests in the region. The palaeoclimatic inferences drawn from the Nanga Wetland sediment profile of Samba District match with the Gharana Wetland sediment profile of Jammu District for the late-Holocene. This study provides insights into the vegetation dynamics, associated climate change and the ISM variability from the poorly understood wetland ecosystems of Southeast Asia during the Holocene.

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Section: Inferred Palaeoclimate From Gw Jammu District With Correlation Of Relevant Studiesmentioning

confidence: 93%

Vegetation dynamics in response to climate change from the wetlands of Western Himalaya, India: Holocene Indian summer monsoon variability

Quamar¹

2018

The Holocene

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“…Evidence of such climatic phases in the Indian subcontinent is also provided by well-dated, proxy records from fluvial deposits (Goswami et al, 2019;Kale & Baker, 2006;Kale, Mishra, & Baker, 2003;Laskar et al, 2013;Sridhar et al, 2015;Srivastava et al, 2017;Sukumaran et al, 2012;Wasson et al, 2013), coastal deposits (Banerji et al, 2017;Banerji et al, 2019), lake sediments (Bhattacharyya et al, 2007;Chauhan, 2015;Misra et al, 2019;Singh et al, 2020), and speleothems records (Gupta et al, 2019;Sinha et al, 2007;. ing an abrupt weakening of the ISM during $2.3-2.1 ka (Figure 9f; Ghosh et al, 2013).…”

Section: Controls On Alluvial Sedimentationmentioning

confidence: 89%

“…Contrarily, the enriched δ 18 O values (weaker ISM intervals) coincide with cold periods such as the Dark Ages Cold (DAC) period (~1200–1600 year ago) and the Little Ice Age (LIA), which occurred between 1300 and 1850 AD (Figure 9b). Evidence of such climatic phases in the Indian subcontinent is also provided by well‐dated, proxy records from fluvial deposits (Goswami et al, 2019; Kale & Baker, 2006; Kale, Mishra, & Baker, 2003; Laskar et al, 2013; Sridhar et al, 2015; Srivastava et al, 2017; Sukumaran et al, 2012; Wasson et al, 2013), coastal deposits (Banerji et al, 2017; Banerji et al, 2019), lake sediments (Bhattacharyya et al, 2007; Chauhan, 2015; Misra et al, 2019; Singh et al, 2020), and speleothems records (Gupta et al, 2019; Sinha et al, 2007; Sinha, Berkelhammer, et al, 2011; Sinha, Stott, et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Late Holocene river dynamics and sedimentation in the Lower Ganga plains, India

et al. 2023

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Handling Editor: M. Ramkumar Packages of fluvial systems in the Lower Ganga plains (LGP) archive the changes in stratigraphic architecture induced by perturbations in the climatic system. In some parts of this landscape, where the fluvial sequences predominate, the role of climate in landsculpting is strongly indicated by the presence of sediment architecture. The present study is focused on the formation of alluvial plains of the Ajay River in the Rarh region that represent a region's environmental templates for understanding the landscape of LGP. The sedimentological, geomorphological, and optically stimulated luminescence (OSL) chronological investigations were attempted to document sedimentation patterns and the timing of deposition. The stratigraphic data from two exposed cliff sections and three boreholes are compared with proxy records to understand the Indian Summer Monsoon (ISM) controls on alluvial sedimentation for the last $2.4 ka. The fluvial packages in the study area correspond to two significant channel phases: Period-I (2.4-1.3 ka) and Period-II (800-200 years ago). Period-I is characterized by the episodes of floodplain development and lateral migration of the trunk river during Marine Isotope Stage (MIS) I, especially around 2 ka corresponding to the Roman Warm (RW) period in the Indian subcontinent. The sediment filling was high during $2.4 ka due to ISM intensification, but in the later stage, the sedimentation was at a fairly steady rate. Conversely, Period-II is characterized by flooding phenomena and aggradation of channel bodies across much of the present valley area during the last 800 years. The distinct flood events occurred during the times of significant shifts in ISM, from fluvial dormancy to sudden outbursts of monsoons (end of Little Ice Age [LIA] $ 19th century), indicating that climatic patterns can be associated with the occurrences of abrupt flood events. The alluvial records fit well with the historical, instrumental, and published proxy data on the ISM validating the chronology and the potential of sedimentary archives for further studies related to the palaeoenvironment and palaeogeography.

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“…Thus, the Holocene climate archives need to be investigated to know the impact of human civilization on vegetation and climate anomalies. Numerous studies have reconstructed paleoclimate/paleo-monsoonal changes on millennial to centennial scales by using both terrestrial as well as marine environment archives such as speleothem records (Denniston et al, 2000; Kumar et al, 2021), tree rings (Fan et al, 2020; Singh et al, 2009), marine sediments (Chauhan and Suneethi, 2001; Li et al, 2019), and lake sediments (Chen et al, 2015a, 2015b; Dash et al, 2022a, 2022b). Despite of being an ultimate sink for riverine sediments, not much emphasis has been put on coastal basins.…”

Section: Introductionmentioning

confidence: 99%

A 2600-yr multiproxy record for climate and vegetation reconstruction along the Mahanadi River delta, east coast of India

et al. 2023

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Understanding the impact of climate change on the vegetation cover in the past is crucial for predicting the future warming scenario and its consequences. The present study integrates biotic (palynological analysis) and abiotic proxy (sediment chemistry, clay mineral assemblages and grain size end member (EM) analysis) records in a chronologically constrained sedimentary sequence from the southeastern part of the Mahanadi River delta to reconstruct the hydroclimate since 2600 years. The Mahanadi delta sediments are primarily derived from felsic rock source possibly composed of granites or granulites. The dominance of herbaceous taxa, high aridity index and deposition of fine grain (EM1) sediment possibly suggest a relatively cold and dry climate in the study region during ~2600–2100 cal yr BP corresponding to the Iron Age Cold Period (IACP). Presence of diverse mangrove and tree taxa, deposition of coarser sediment (EM3) and relatively high abundance of secondary clay minerals possibly indicate high precipitation associated with the Roman Warm Period (RWP, ~2100–1800 cal yr BP). A decline in mangroves, dominance of herbaceous taxa and high deposition of fine grain (EM2) sediment from ~1800 to 1300 cal yr BP may indicate a relatively drier climate coinciding with the Dark Age Cold Period (DACP). High moisture index and an increased value of Rb/Sr during ~1300 cal yr BP may suggest a wet phase with the onset of the Medieval Climatic Anomaly (MCA) and later shifted to an arid climate during ~1100–800 cal yr BP. After ~800 cal yr BP, a sharp decline in all weathering indices and vegetation cover, dominance of illite indicates a relatively dry climate which could mark the Little Ice Age (LIA, ~800–300 cal yr BP). A small increase in the terrestrial flux, as well as the weathering indices after ~300 cal yr BP, may suggest the onset of recent warming.

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Vegetation and climatic variability in southeastern Madhya Pradesh, India since Mid-Holocene, based on pollen records

Cited by 6 publications

References 11 publications

Vegetation dynamics in response to climate change from the wetlands of Western Himalaya, India: Holocene Indian summer monsoon variability

Vegetation dynamics in response to climate change from the wetlands of Western Himalaya, India: Holocene Indian summer monsoon variability

Late Holocene river dynamics and sedimentation in the Lower Ganga plains, India

A 2600-yr multiproxy record for climate and vegetation reconstruction along the Mahanadi River delta, east coast of India

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