Warm‐air advection, air mass transformation and fog causes rapid ice melt
Abstract
Direct observations during intense warm‐air advection over the East Siberian Sea reveal a period of rapid sea‐ice melt. A semistationary, high‐pressure system north of the Bering Strait forced northward advection of warm, moist air from the continent. Air‐mass transformation over melting sea ice formed a strong, surface‐based temperature inversion in which dense fog formed. This induced a positive net longwave radiation at the surface while reducing net solar radiation only marginally; the inversion also resulted in downward turbulent heat flux. The sum of these processes enhanced the surface energy flux by an average of ~15 W m−2 for a week. Satellite images before and after the episode show sea‐ice concentrations decreasing from > 90% to ~50% over a large area affected by the air‐mass transformation. We argue that this rapid melt was triggered by the increased heat flux from the atmosphere due to the warm‐air advection.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 04, 2015
- Source ID
- 10.1002/2015gl064373
Entities
People
- Barbara J. Brooks
- Dan Wolfe
- Dominic J. Salisbury
- Georgia Sotiropoulou
- Ian M. Brooks
- John Prytherch
- Joseph Sedlar
- Matthew Shupe
- Michael Tjernström
- P. Ola G. Persson
- Paul E. Johnston
- Peggy Achtert
Organizations
- Knut and Alice Wallenberg Foundation
- National Oceanic and Atmospheric Administration
- Natural Environment Research Council
- Office of Naval Research
- Stockholm University
- Swedish Research Council
- University of Leeds