TY  - JOUR
A1  - Mishra, Praveen Kumar
A1  - Anoop, Ambili
A1  - Schettler, Georg
A1  - Prasad, Sushma
A1  - Jehangir, Arshid
A1  - Menzel, Peter
A1  - Naumann, Rudolf
A1  - Yousuf, A. R.
A1  - Basavaiah, Nathani
A1  - Deenadayalan, Kannan
A1  - Wiesner, Martin G.
A1  - Gaye, Birgit
T1  - Reconstructed late Quaternary hydrological changes from Lake Tso Moriri, NW Himalaya
JF  - Quaternary international : the journal of the International Union for Quaternary Research
N2  - We present the results of our investigations on the radiocarbon dated core sediments from the Lake Tso Moriri, NW Himalaya aimed at reconstructing palaeohydrological changes in this climatically sensitive region. Based on the detailed geochemical, mineralogical and sedimentological analysis, we recognise several short-term fluctuations superimposed upon seven major palaeohydrological stages identified in this lake since similar to 26 cal ka. Stage I (>20.2 cal ka): shallow lake characterised by input of coarse-grained detrital sediments; Stage II (20.2-16.4 cal ka): lake deepening and intensification of this trend ca. 18 cal ka; Stage III (16.4-11.2 cal ka): rising lake levels with a short term wet phase (13.1-11.7 cal ka); Stage IV (11.2-8.5 cal ka): early Holocene hydrological maxima and highest lake levels inferred to have resulted from early Holocene Indian monsoon intensification, as records from central Asia indicate weaker westerlies during this interval; Stage V (8.5-5.5 cal ka): mid-Holocene climate deterioration; Stage VI (5.5-2.7 cal ka): progressive lowering of lake level; Stage VII (2.7-0 cal ka): onset of modern conditions. The reconstructed hydrological variability in Lake Tso Moriri is governed by temperature changes (meltwater inflow) and monsoon precipitation (increased runoff). A regional comparison shows considerable differences with other palaeorecords from peninsular India during late Holocene. (C) 2014 Elsevier Ltd and INQUA. All rights reserved.
KW  - Authigenic carbonates
KW  - Holocene
KW  - Indian summer monsoon
KW  - Lake sediments
KW  - Tso Moriri Lake
KW  - Westerlies
Y1  - 2015
U6  - https://doi.org/10.1016/j.quaint.2014.11.040
SN  - 1040-6182
SN  - 1873-4553
VL  - 371
SP  - 76
EP  - 86
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Mishrat, Praveen K.
A1  - Anoop, A.
A1  - Jehangir, A.
A1  - Prasad, Sushma
A1  - Menze, R.
A1  - Schettler, Georg
A1  - Naumann, R.
A1  - Weise, S.
A1  - Andersen, N.
A1  - Yousuf, A. R.
A1  - Gaye, Birgit
T1  - Limnology and modern sedimentation patterns in high altitude Tso Moriri Lake, NW Himalaya - implications for proxy development
JF  - Fundamental and applied limnology : official journal of the International Association of Theoretical and Applied Limnology
N2  - We report the results of our investigations on the catchment area, lake surface sediments, and hydrology of the high altitude alpine Tso Moriri Lake, NW Himalayas (India). Our results indicate that the lake is currently alkaline, and thermally stratified with an oxic bottom layer. Results from hydrochemistry and isotopic composition (delta O-18 and delta D) of inflowing streams and lake waters show that Tso Moriri Lake is an evaporative lake with contributions from both westerly source (snow melt) and Indian summer monsoon precipitation. Geochemical and mineralogical investigations on the catchment and lake surface sediments reveal the presence of authigenic aragonite in modern lake sediment. The lithogenic components reflect the inflow and sorting processes during transport into the lake, whereas the authigenic carbonate fraction can be linked to the changes in ([precipitation+meltwater]/evaporation) (I/E) balance within the lake. The spatial variability in grain size distribution within the lake surface sediments shows that the grain size data can be utilised as a proxy for transport energy and shoreline proximity in the lake basin. We have evaluated the applicability of commonly applied environmentally sensitive proxies (isotopes, mineralogy, weathering indices) for palaeoenvironmental reconstruction in the Tso Moriri Lake. Our results show that the commonly used weathering index (Rb/Sr) is not applicable due to Sr contribution from authigenic carbonates. The useful weathering indices in Tso Moriri Lake are the Si/Al and the Chemical Proxy of Alteration (CPA). Since the carbonates are formed by evaporative processes, their presence and isotopic values can be used as indicators of I/E changes in the lake.
KW  - geochemistry
KW  - lake sediments
KW  - palaeoenvironmental proxies
KW  - Tso Moriri Lake
KW  - weathering indices
Y1  - 2014
U6  - https://doi.org/10.1127/fal/2014/0664
SN  - 1863-9135
VL  - 185
IS  - 3-4
SP  - 329
EP  - 348
PB  - Schweizerbart
CY  - Stuttgart
ER  -