During the late spring and summer, Arctic sea ice experiences some of its most drastic changes. As highly reflective snow and ice surfaces melt, they are replaced by darker, light-absorbing melt ponds and ocean water, lowering the overall albedo (the ratio of reflected to incident solar radiation) of the Arctic ice pack. Over the last 40 years, we have observed a dramatic decline of summer sea ice extent as well as a shift from a largely perennial to a more seasonal Arctic ice pack. Smoother seasonal ice, which forms during the winter and melts to open water during the summer, has significant topographical differences from rougher, hummocky multiyear ice. Using both levelset and temporal modeling approaches, we investigate the connection between sea ice surface topography and resulting albedo during melt pond evolution. Our findings suggest that surface topography is an important driver of ice-albedo feedback. In this talk, I will discuss these findings and how the significant differences in the albedo profiles of seasonal versus multiyear ice help drive the system toward the disappearance of multiyear ice.
University / Institution: University of Utah
Format: In Person
SESSION B (10:45AM-12:15PM)
Area of Research: Science & Technology
Faculty Mentor: Ken Golden
Location: Alumni House, DUMKE ROOM (11:05am)