Authors
Kara Hartig (CIRES,NSIDC), John J. Cassano (CIRES,NSIDC,ATOC), Matthew D. Shupe (CIRES,NSIDC,NOAA/PSL), Amy Solomon (CIRES,NSIDC,NOAA/PSL)
Abstract
The presence or absence of liquid-containing clouds in the Arctic is tightly coupled to the surface energy budget in the cold months, helping to set surface temperatures and sea ice extent. However, the meteorological conditions that give rise to these clouds and their remarkable persistence across the Arctic are not well constrained, leading to model biases. Using over a decade of observations from the North Slope of Alaska, this research investigates the relationship between local meteorology, large-scale circulation, and cloud liquid and ice water path. We find that temperature, moisture, wind direction, and large-scale circulation regime are surprisingly poor predictors of liquid water path. Meteorological regimes with significant differences in temperature, moisture, and cloud fraction do not produce appreciable differences in cloud liquid water path. Ice water path, on the other hand, is correlated with bulk atmospheric moisture and particularly with anomalously moist conditions and may be responsible for the muted response of liquid water path to high atmospheric moisture.