TY  - JOUR
A1  - Menzel, Philip
A1  - Gaye, Birgit
A1  - Mishra, Praveen Kumar
A1  - Anoop, Ambili
A1  - Basavaiah, Nathani
A1  - Marwan, Norbert
A1  - Plessen, Birgit
A1  - Prasad, Sushma
A1  - Riedel, Nils
A1  - Stebich, Martina
A1  - Wiesner, Martin G.
T1  - Linking Holocene drying trends from Lonar Lake in monsoonal central India to North Atlantic cooling events
JF  - Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences
N2  - We present the results of biogeochemical and mineralogical analyses on a sediment core that covers the Holocene sedimentation history of the climatically sensitive, closed, saline, and alkaline Lonar Lake in the core monsoon zone in central India. We compare our results of C/N ratios, stable carbon and nitrogen isotopes, grain-size, as well as amino acid derived degradation proxies with climatically sensitive proxies of other records from South Asia and the North Atlantic region. The comparison reveals some more or less contemporaneous climate shifts. At Lonar Lake, a general long term climate transition from wet conditions during the early Holocene to drier conditions during the late Holocene, delineating the insolation curve, can be reconstructed. In addition to the previously identified periods of prolonged drought during 4.6-3.9 and 2.0-0.6 cal ka that have been attributed to temperature changes in the Indo Pacific Warm Pool, several additional phases of shorter term climate alteration superimposed upon the general climate trend can be identified. These correlate with cold phases in the North Atlantic region. The most pronounced climate deteriorations indicated by our data occurred during 62-5.2,4.6-3.9, and 2.0-0.6 cal ka BP. The strong dry phase between 4.6 and 3.9 cal ka BP at Lonar Lake corroborates the hypothesis that severe climate deterioration contributed to the decline of the Indus Civilisation about 3.9 ka BP. (C) 2014 Elsevier B.V. All rights reserved.
KW  - Lake sediment
KW  - Indian monsoon
KW  - Holocene
KW  - Climate reconstruction
KW  - Stable carbon isotope
KW  - Amino acid
Y1  - 2014
U6  - https://doi.org/10.1016/j.palaeo.2014.05.044
SN  - 0031-0182
SN  - 1872-616X
VL  - 410
SP  - 164
EP  - 178
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Prasad, Sushma
A1  - Anoop, A.
A1  - Riedel, N.
A1  - Sarkar, Saswati
A1  - Menzel, P.
A1  - Basavaiah, Nathani
A1  - Krishnan, R.
A1  - Fuller, D.
A1  - Plessen, Birgit
A1  - Gaye, B.
A1  - Roehl, U.
A1  - Wilkes, H.
A1  - Sachse, Dirk
A1  - Sawant, R.
A1  - Wiesner, M. G.
A1  - Stebich, M.
T1  - Prolonged monsoon droughts and links to Indo-Pacific warm pool: A Holocene record from Lonar Lake, central India
JF  - Earth & planetary science letters
N2  - Concerns about the regional impact of global climate change in a warming scenario have highlighted the gaps in our understanding of the Indian Summer Monsoon (ISM, also referred to as the Indian Ocean summer monsoon) and the absence of long term palaeoclimate data from the central Indian core monsoon zone (CMZ). Here we present the first high resolution, well-dated, multiproxy reconstruction of Holocene palaeoclimate from a 10 m long sediment core raised from the Lonar Lake in central India. We show that while the early Holocene onset of-intensified monsoon in the CMZ is similar to that reported from other ISM records, the Lonar data shows two prolonged droughts (PD, multidecadal to centennial periods of weaker monsoon) between 4.6-3.9 and 2-0.6 cal ka. A comparison of our record with available data from other ISM influenced sites shows that the impact of these PD was observed in varying degrees throughout the ISM realm and coincides with intervals of higher solar irradiance. We demonstrate that (i) the regional warming in the Indo-Pacific Warm Pool (IPWP) plays an important role in causing ISM PD through changes in meridional overturning circulation and position of the anomalous Walker cell; (ii) the long term influence of conditions like El Nino-Southern Oscillation (ENSO) on the ISM began only ca. 2 cal ka BP and is coincident with the warming of the southern IPWP; (iii) the first settlements in central India coincided with the onset of the first PD and agricultural populations flourished between the two PD, highlighting the significance of natural climate variability and PD as major environmental factors affecting human settlements.
KW  - Indian summer monsoon
KW  - ENSO
KW  - prolonged droughts
KW  - Holocene
KW  - Lonar Lake
Y1  - 2014
U6  - https://doi.org/10.1016/j.epsl.2014.01.043
SN  - 0012-821X
SN  - 1385-013X
VL  - 391
SP  - 171
EP  - 182
PB  - Elsevier
CY  - Amsterdam
ER  -