TY  - JOUR
A1  - Basavaiah, Nathani
A1  - Wiesner, M. G.
A1  - Anoop, Ambili
A1  - Menzel, P.
A1  - Nowaczyk, Norbert R.
A1  - Deenadayalan, K.
A1  - Brauer, Achim
A1  - Gaye, Birgit
A1  - Naumann, R.
A1  - Riedel, N.
A1  - Stebich, M.
A1  - Prasad, Sushma
T1  - Physicochemical analyses of surface sediments from the Lonar Lake, central India - implications for palaeoenvironmental reconstruction
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, surface sediments, and hydrology of the monsoonal Lonar Lake, central India. Our results indicate that the lake is currently stratified with an anoxic bottom layer, and there is a spatial heterogeneity in the sensitivity of sediment parameters to different environmental processes. In the shallow (0-5 m) near shore oxic-suboxic environments the lithogenic and terrestrial organic content is high and spatially variable, and the organics show degradation in the oxic part. Due to aerial exposure resulting from lake level changes of at least 3m, the evaporitic carbonates are not completely preserved. In the deep water (>5 m) anoxic environment the lithogenics are uniformly distributed and the delta C-13 is an indicator not only for aquatic vs. terrestrial plants but also of lake pH and salinity. The isotopic composition of the evaporites is dependent not only on the isotopic composition of source water (monsoon rainfall and stream inflow) and evaporation, but is also influenced by proximity to the isotopically depleted stream inflow. We conclude that in the deep water environment lithogenic content, and isotopic composition of organic matter can be used for palaeoenvironmental reconstruction.
KW  - isotopes
KW  - lonar lake
KW  - modern surface sediments
KW  - magnetic parameters
KW  - monsoon
KW  - palaeoenvironmental proxies
Y1  - 2014
U6  - https://doi.org/10.1127/1863-9135/2014/0515
SN  - 1863-9135
VL  - 184
IS  - 1
SP  - 51
EP  - 68
PB  - Schweizerbart
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Marwan, Norbert
A1  - Nowaczyk, Norbert R.
A1  - Kurths, Jürgen
A1  - Thiel, Marco
T1  - Cross recurrence plot based rescaling of geological time series
N2  - The rescaling of geological data series to a geological reference time series is of major interest in many investigations. For example, geophysical borehole data should be correlated to a given data series whose time scale is known in order to achieve an age-depth function or the sedimentation rate for the borehole data. Usually this synchronization is performed visually and by hand. Instead of using this wiggle matching by eye, we present the application of cross recurrence plots for such tasks. Using this method, the synchronization and rescaling of geological data to a given time scale is much easier and faster than by hand.
Y1  - 2001
SN  - 1029-7006
ER  - 
TY  - JOUR
A1  - Marwan, Norbert
A1  - Thiel, Marco
A1  - Nowaczyk, Norbert R.
T1  - Cross recurrence plot based synchronization of time series
N2  - The method of recurrence plots is extended to the cross recurrence plots (CRP), which among others enables the study of synchronization or time differences in two time series. This is emphasized in a distorted main diagonal in the cross recurrence plot, the line of synchronization (LOS). A non-parametrical fit of this LOS can be used to rescale the time axis of the two data series (whereby one of it is e.g. compressed or stretched) so that they are synchronized. An application of this method to geophysical sediment core data illustrates its suitability for real data. The rock magnetic data of two different sediment cores from the Makarov Basin can be adjusted to each other by using this method, so that they are comparable.
Y1  - 2002
UR  - http://arxiv.org/abs/physics/0201062
ER  -