Is there amplified influence of CO2 rise in the Arctic?

Kiehl and Trenberth estimated in their 1997 paper that the most important greenhouse gases are water vapour (60%) and CO2 (26%). Kiehl and Trenberth used vertical profiles of temperature, water vapour, and ozone that were derived from the U.S. Standard Atmosphere from 1976. Actual conditions in the Arctic differ significantly from this standard case. Integrated water vapour in the U.S. Standard Atmosphere is 14 mm, but the values in the Arctic are averagely below 4 mm in winter and even in summer only about 12 mm. As there is less water vapour in the Arctic, but CO2 is distributed quite evenly around the globe, then CO2 rise should affect Arctic region climate warming more than in average, especially in winter. In the presentation radiative transfer model FUTBOLIN will be used to calculate atmosphere column spectral absorption and scattering at different wavelengths using different CO2 and water vapour contents.