Encyclopedia of Snow, Ice and Glaciers

2011 Edition
| Editors: Vijay P. Singh, Pratap Singh, Umesh K. Haritashya

Albedo

  • Thomas C. Grenfell
Reference work entry
DOI: https://doi.org/10.1007/978-90-481-2642-2_14

Definition

Albedo: The fraction of incident solar radiative energy flux, or irradiance, reflected and scattered upward from a surface integrated over the solar spectrum from 300 to approximately 3,000 nm.

Spectral Albedo. The ratio of upwelling to incident irradiance versus the wavelegth of the radiation.

Introduction

Heat exchange over snow and ice is strongly affected by the interaction of solar radiation with the surface. A quantitative understanding of this interaction is critical in treating a wide variety of problems involving both the state and evolution of the surface, the subsurface layers, and the overlying atmosphere. The concept of surface albedo has been introduced as an essential tool for specifying the surface energy balance. The albedos of surfaces across the Arctic and Antarctic as well as snow-covered and glaciated areas at lower latitudes have been an ongoing topic of observations and modeling for many years. Pioneering work has been carried out by Dunkle and Bevans...

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Thomas C. Grenfell
    • 1
  1. 1.Department of Atmospheric SciencesUniversity of WashingtonSeattleUSA