Lacustrine sediment information HDP04, HDP08 and HDP09) printed in Lake H(o)vsg(o)l, Northern Mongolia and the lake-catchment conditions reveal long-and short-term environmental changes in the lake-catchment system.Changes in fluvial systems between the Holocene and the late Pleistocene have influenced sedimentary conditions.The information suggests that there were often rapid mass inflows (debris flow, turbidity, etc.) from the catchments during the late Pleistocene.The glacial-interglacial cycle is most clearly presented by aridity (water level change): three Milankovitch parameters (precession, obliquity and eccentricity) are detected in long lacustrine information.A deep depression (cold stage comparable to glacial periods), corresponded to insolation minimum, is detected at about the MIS-5d in records, indicating that this region is highly sensitive to solar insolation.Another depression found during the MIS-11 interval, corresponded also to small insolation minimum, shows that the interval was not a simple prolonged interglacial period.