Impacts of Extratropical Weather Perturbations on Tropical Cyclone Activity: Idealized Sensitivity Experiments With a Regional Atmospheric Model

Key Points Artificial suppression of extratropical weather perturbations along 45°N elevates hurricane activity at 30–40°N in idealized experiments The response is related to reduced equatorward mixing of extratropical dry air, which could occur to some degree in altered climate states The experimental results suggest mechanisms through which extratropical atmospheric variability could affect tropical...