gesjGEOGRAPHY, ENVIRONMENT, SUSTAINABILITYGEOGRAPHY, ENVIRONMENT, SUSTAINABILITY2071-93882542-1565Russian Geographical Society10.24057/2071-9388-2021-030gesj-2178Research ArticleSpecial Issue "Permafrost regions in transition"Hydrological Conditions Of Drained Lake Basins Of The Anadyr Lowland Under Changing Climatic ConditionsTregubovОleg D.

16 Portovaya St., 685000, Magadan

tregubov2@yandex.ruGlotovVladimir E.

16 Portovaya St., 685000, Magadan

KonstantinovPavel Ya.

36 Merzlotnaya St., 677010, Yakutsk

ShamovVladimir V.

Radio 7, 690041, Vladivostok,

36 Merzlotnaya St., 677010, Yakutsk

North-Eastern Interdisciplinary Scientific Research Institute N.A. Shilo FEB RASRussian FederationMelnikov Permafrost Institute SB RASRussian FederationPacific Geographical Institute FEB RAS; Melnikov Permafrost Institute SB RASRussian Federation2021281220211444154Copyright © Tregubov О.D., Glotov V.E., Konstantinov P.Y., Shamov V.V., 20212021Tregubov О.D., Glotov V.E., Konstantinov P.Y., Shamov V.V.Tregubov О.D., Glotov V.E., Konstantinov P.Y., Shamov V.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ges.rgo.ru/jour/article/view/2178

The lakes of the Arctic lowlands are both the unique indicator and the result of climatic and permafrost changes. Remote sensing methods and field measurements were used to consider the patterns and features of the morphometric indicators dynamics of the Anadyr lowland lakes over 65 years. We analyzed the parameters of 36 lakes with an area of 0.02–0.3 km2 located in the bottoms of drained lake basins, in river floodplains, on sea-shore terraces. Field studies were conducted on 22 typical lakes. The considered dynamics of seasonal thawing are based on the monitoring of the active layer for 1994–2020. Due to an increase of mean annual air temperature by 1.8 °C, as well as an increase and then a decrease in the mean annual precipitation by 135 mm, the average share of a lake area in the study area decreased by 24%. It is shown for the first time that cryogenic processes of the lacustrine coastal zone affect the change in the area of lakes simultaneously with the influence of precipitation and air temperature. Based on field observations, we considered two causes of natural drainage: discharge of the lakes through newly formed thermokarst and thermoerosional surface flow channels and decrease in suprapermafrost groundwater recharge as a result of changing depth of seasonally thawed active layer in the coastal zone.

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The authors declare that there are no conflicts of interest present.