Surface atmospheric duct over Svalbard, Arctic, related to atmospheric and ocean conditions in winter

Atmospheric ducts could disturb radar detection and radio communication in the Arctic risk increasing human activities under warming. It is an urgent need to understand atmospheric Arctic, with distinct systems environment. This study attempts analyze surface over Svalbard, as a critical region Ocean, discuss relation oceanic conditions, based on observation reanalysis data. The results show occurrence of 12.6 percent, mean strength 1.30 MU, depth 13 m for duct Svalbard winter from December 2018 February 2020. characterized two types: T-type mainly constructed by temperature inversion H-type humidity gradient. dominates winter, appearance percentage 80 indicating importance construction. closely related conditions because occurs colder, drier, northeasterly weather warmer, wetter, southeasterly higher sea temperature.