Abstract: Lake Van, which is the largest soda lake of the earth, lies in the Eastern Anatolian High Plateau. Twodifferent composite cores, that span the last 250 kyr and 90 kyr, were drilled in Lake Van within the frameworkof PALEOVAN project (ICDP). In order to test the theories of quasi-periodic behavior of climate, generated byastronomical and solar forces, this study investigates the cycles in Lake Van sediment geochemistry data by theLomb-Scargle Periodogram (LSP) spectral method. The results are correlated with the Eastern MediterraneanLC21 sediment core, Soreq and Sofular Cave speleothem stable isotope data with LSP results. The analyses showthe presence of the Milankovitch cycles, harmonics of the Milankovitch cycles, Holocene Bond cycles and theHallstadtzeit solar cycle. However, the results do not give a 1500 year cycle for 11.5-75 kyr BP interval.