Preliminary estimation of Lake El'gygytgyn water balance and sediment income
- 1Arctic and Antarctic Research Institute, Bering Street 38, 199397 St. Petersburg, Russia
- 2St. Petersburg State University, Faculty of Geography and Geoecology, 10 line V.O., 33, 199178, St. Petersburg, Russia
- 3Water and Environmental Research Center, Institute of Northern Engineering, 306 Tanana Drive, Duckering Room 437, University of Alaska Fairbanks, Fairbanks, Alaska 99775-5860, USA
- 4Department of Geosciences, University of Massachusetts, P.O. Box 35820, Amherst, MA 01003-5820, USA
- 5Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg, 14471 Potsdam, Germany
- 6Institute of Applied Geology, Technical University of Berlin, Ackerstrasse 76, Sek ACK 1-1, 13355 Berlin, Germany
Abstract. Modern process studies of the hydrologic balance of Lake El'gygytgyn, central Chukotka, and the sediment income from the catchment were carried out during a field campaign in spring and summer 2003. Despite high uncertainties due to the limited data, the results provide important first estimates for better understanding the modern and past sedimentation processes in this basin. Formed ca. 3.6 million years ago as a result of a meteorite impact, the basin contains one of the longest paleoclimate records in the terrestrial Arctic. Fluvial activity is concentrated over the short snowmelt period (about 20 days in second part of June). Underground outflow plays a very important role in the water balance and predominates over surface outflow. The residence time of the lake water is estimated to be about 100 yr.