Vegetational and seasonal climatic changes since the last full glacial in the Thar Desert, northwestern India

Singh, Gurdip; Wasson, Robert J.; Agrawal, D. P.

doi:10.1016/0034-6667(90)90151-8

Cited by 250 publications

(107 citation statements)

References 15 publications

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“…The argillaceous limestone in these lakes was precipitated between 6238±37 and 4491±35 14 C yr BP , under wet and warm conditions. The Lunkaransar lake in northern Rajastan also witnessed high water level between 6300 and 4800 14 C yr BP (Enzel et al, 1999), and so did the other lakes in Rajastan (Singh et al, 1974 and1990). Based on these data, it is possible to suggest that summer monsoons were much stronger during MidHolocene over a large area of the Thar desert and its northeastern fringe in Haryana.…”

Section: Sedimentry Evolution and Environ-mentmentioning

confidence: 84%

Luminescence Dating of the Sediments from a Buried Channel Loop in Fatehabad Area, Haryana: Insight into Vedic Saraswati River and its Environment

Saini

Mujtaba

2010

Geochronometria

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Geomorphology and sedimentary composition of an archeologically important palaeochannel segment of the Vedic Saraswati River in northwestern Haryana have been evaluated and its temporal relation with the surrounding upland examined with the help of OSL dating. Sediment composition and OSL ages suggest that the channel received enough water supply between 5.9 and 4.3 ka ago, and even before. Several lakes and ponds had developed during this period in the surrounding areas. It was a wet phase in this area as well as in Rajastahn. After ~4.3 ka, the river got starved of regular water supply, became sluggish and finally dried up. Reduced water supply, indicative of decreased rainfall, occurred between 4.3 and 3.4 ka ago. The environmental history of the channel might have influenced the Harrapan archeology of the area.

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Section: Sedimentry Evolution and Environ-mentmentioning

confidence: 84%

Luminescence Dating of the Sediments from a Buried Channel Loop in Fatehabad Area, Haryana: Insight into Vedic Saraswati River and its Environment

Saini

Mujtaba

2010

Geochronometria

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“…humid phase. This climatic shift can be correlated with changes in atmospheric moisture over India (35) and low lake levels in Turkey (36). Peaking values of arid/saline Chenopodiaceae and a collapse of agriculture at ca.…”

Section: Resultsmentioning

confidence: 99%

Middle East coastal ecosystem response to middle-to-late Holocene abrupt climate changes

Kaniewski

Paulissen²,

Campo³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

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The Holocene vegetation history of the northern coastal Arabian Peninsula is of long-standing interest, as this Mediterranean/ semiarid/arid region is known to be particularly sensitive to climatic changes. Detailed palynological data from an 800-cm alluvial sequence cored in the Jableh plain in northwest Syria have been used to reconstruct the vegetation dynamics in the coastal lowlands and the nearby Jabal an Nuşayriyah mountains for the period 2150 to 550 B.C. Corresponding with the 4.2 to 3.9 and 3.5 to 2.5 cal kyr BP abrupt climate changes (ACCs), two large-scale shifts to a more arid climate have been recorded. These two ACCs had different impacts on the vegetation assemblages in coastal Syria. The 3.5 to 2.5 cal kyr BP ACC is drier and lasted longer than the 4.2 to 3.9 cal kyr BP ACC, and is characterized by the development of a warm steppe pollen-derived biome (1100 -800 B.C.) and a peak of hot desert pollen-derived biome at 900 B.C. The 4.2 to 3.9 cal kyr BP ACC is characterized by a xerophytic woods and shrubs pollenderived biome ca. 2050 B.C. The impact of the 3.5 to 2.5 cal kyr BP ACC on human occupation and cultural development is important along the Syrian coast with the destruction of Ugarit and the collapse of the Ugarit kingdom at ca. 1190 to 1185 B.C.pollen-derived biomes ͉ Tell Tweini ͉ Syria ͉ bond events

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“…In early Holocene time, not only were lakes widespread in northern India where desert conditions now prevail [e.g., Bryson and Swain, 1981;Enzel et al, 1999;Prasad and Enzel, 2006;Prasad et al, 1997;Singh et al, 1972Singh et al, , 1990Sinha et al, 2004], but winds associated with the Somali Jet seem to have been stronger [e.g., Gupta et al, 2003]. By contrast, before~10 Ma, winds associated with the Somali Jet seem to have been weaker than today, and some have inferred that the monsoon strengthened since that time [e.g., Harrison et al, 1992;Kroon et al, 1991;Molnar et al, 1993;Prell and Kutzbach, 1992].…”

Section: Discussion: Possible Relevance To Paleoclimatementioning

confidence: 99%

Signatures of Tibetan Plateau heating on Indian summer monsoon rainfall variability

Rajagopalan

Molnár

2013

JGR Atmospheres

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[1] Despite recent challenges, conventional wisdom has held that heating over the Tibetan Plateau leads to increased Indian summer monsoon rainfall via enhancement of cross-equatorial circulation aloft, and a concurrent strengthening of both the Somali Jet and westerly winds that bring moisture to southern India. We show that such heating, quantified by monthly estimates of moist static energy in the atmosphere just above the surface, correlates with summer monsoon rainfall, but only in the early (20 May to 15 June) and late (September 1 to 15 October) monsoon season. Correlations during the main monsoon season (15 June to 31 August) are small and insignificant. The positive correlations with early and late monsoon season, however, allow for heating over Tibet to modulate as much as 30% of the total rainfall. Furthermore, we demonstrate that heating over Tibet is independent of the El Niño Southern Oscillation, so that together they explain a substantial portion of variability in the early and late season rainfall, providing potential predictability. These links may also explain the wet conditions over India during early Holocene time and provide a quantitative link between a rise of Tibet and stronger Somali Jet.

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Vegetational and seasonal climatic changes since the last full glacial in the Thar Desert, northwestern India

Cited by 250 publications

References 15 publications

Luminescence Dating of the Sediments from a Buried Channel Loop in Fatehabad Area, Haryana: Insight into Vedic Saraswati River and its Environment

Luminescence Dating of the Sediments from a Buried Channel Loop in Fatehabad Area, Haryana: Insight into Vedic Saraswati River and its Environment

Middle East coastal ecosystem response to middle-to-late Holocene abrupt climate changes

Signatures of Tibetan Plateau heating on Indian summer monsoon rainfall variability

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