Low-Level Temperature Inversions over Alaska's North Slope: Results from Radiosondes during 2018 Special Observing Periods

The Year of Polar Prediction (YOPP) was created to improve weather prediction models and thus make weather forecasts more accurate. Ensuring that people have accurate and timely information about upcoming weather events is critical to ensuring human health and safety. Although YOPP focuses specifically on the polar regions, improving weather forecasts in the Arctic will lead to better forecasts across the world. The focus of this research was understanding low-level temperature inversions. Since these low-level inversions can be tied to larger-scale weather events, understanding more about them will foster further knowledge on other aspects of the atmosphere such as Arctic haze. Radiosonde profiles from Utqiaġvik, Alaska collected during YOPP Special Observing Periods, throughout which more data was gathered than is standard, were analyzed in this research. These data were analyzed using computer algorithms, statistical tests, and visual analyses. Results included plots of low-level inversions and statistics covering their depth, temperature gradient, and other factors. Examples of how inversion characteristics vary throughout the day and year were also shown. The results from this research will be shared with scientists on the YOPP Supersite Model Intercomparison Project (YOPPSiteMIP), who will compare the observational data to weather prediction models to understand where they are producing errors and why.