The article presents an analysis of the impacts of climate change on the natural and economic systems of theArcticand the existing methods for assessing climatic risks. Based on the analysis of the impact of climate change on natural and economic systems and the Arctic population, a register of risks due to climate change has been formed. A conceptual model for assessing the impact of climate change on various systems is proposed. The main problems in the identification of climatic risks in theArcticare identified. Indicators of climate change were selected: the surface air temperature; sea ice extent and the frequency of dangerous hydrometeorological phenomena that affect economic activity in the Arctic sea zone and its individual regions. The assessment methodology of natural and economic systems vulnerabilities in the Russian Arctic sea zone, including susceptibility to impacts, sensitivity and adaptive potential, is considered. These are the key factors on the basis of which the systems vulnerability to climate change is determined, as well as the information support of the processes of assessment and reduction of the consequences of climate threats. The algorithm of the developed methodology for vulnerability determining includes a sequence of 7 steps.