Understanding the radiative effects of Arctic low-level clouds

We use a synergy of A-Train observations to estimate the microphysical and radiative properties of the Arctic low-level clouds in the cold season, and thus investigate the radiative effects of low-level clouds at both the surface and the top of the atmosphere. While all low-level clouds are found to warm the surface (as expected), about 40% of those tend to cool the Arctic system as a whole in winter.

  • Li, X., Mace, G. G., Strong, C., & Krueger, S. K. (2022). Wintertime low-level clouds over sea ice cool the Arctic climate system. [Submitted]

Understanding the Impacts of Arctic sea ice leads on low-level clouds

We use a broad array of observations to investigate the relation between Arctic lead area fraction and the occurrence of low-level clouds in the wintertime and find a counterintuitive association between them both in a local-scale region and in the pan-Arctic. We further examine the underlying physical mechanisms using a 3D LES model (SAM). Further details can be found in the following two publications.