Warming temperatures are impacting the hydrometeorological regime of Russian rivers in the zone of continuous permafrost Olga Makarieva1,2, Nataliia Nesterova2,3, David A. Post4, Artem Sherstyukov5, Lyudmila Lebedeva2 5 1Saint Petersburg State University, Institute of Earth Sciences, 7/9 Universitetskaya nab, St. Petersburg, Russia 199034 2Melnikov Permafrost Institute, Merzlotnaya St., 36, Yakutsk, Russia 677010 3State Hydrological Institute, Department of Experimental Hydrology and Mathematical Modelling of Hydrological Processes, 23 2-ya liniya VO, St. Petersburg, Russia 199053 10 4Commonwealth Scientific and Industrial Research Organisation, GPO Box 1700, Canberra, Australia 5All-Russia Research Institute of Hydrometeorological Information – World Data Centre (RIHMI-WDC), 6 Korolyov St., Obninsk, Kaluga Region, 249035, Russia Correspondence to: Olga Makarieva (
[email protected],
[email protected]) 15 Abstract. There are statistically significant (p<0.05) positive trends in monthly streamflow in the autumn-winter Удалено: Analysis period for stream gauges across a range of scales in the Yana and Indigirka river basins, which are completely 40 Удалено: was conducted located in the zone of continuous permafrost. These changes are occurring in conjunction with increases in average Удалено: in the Yana and Indigirka River basins annual air temperature of 1.1 to 1.3 °С, as measured at all 13 meteorological stations in the region. We conclude that Удалено: 5 warmer temperatures due to climate change are impacting the hydrological regime of these rivers via changes in Удалено: 79 20 precipitation type (rain replacing snow). Other factors such as melting of permafrost, glaciers and, aufeis, and 45 Удалено: These river basins are located changes in groundwater conditions are also likely to contribute to these changes in streamflow, but no direct completely in the zone of continuous permafrost.