The influence of spatial variability of polar firn on microwave emission


Contact
Stefanie.Weissbach [ at ] awi.de

Abstract

Precise measurements of snow structural parameters and stratigraphy are essential to understand and model the radiative properties of the snow cover. However, most snow measurements are limited in spatial resolution and by extensive measurement times, which particularly constrains their applicability in harsh polar environments. For this reason, we developed a statistical model to derive three major snow structural parameters, density, correlation length and specific surface area solely from a portable, high-resolution penetrometer. We demonstrate the potential of the method by a 25 m long and 1.1 m deep transect through Antarctic firn at Kohnen Station, Antarctica, which reveals the stratigraphic features of the firn clearly. Based on these data, we run the Microwave Emission Model of Layered Snowpacks (MEMLS) and analyze the influence of the spatial variability of the firn around Kohnen Station on the microwave emission of the snowpack. We discuss the potential and limitations of the method and highlight the need for spatially distributed, quantitative measurements for modeling the microwave emission from polar snow and firn.



Item Type
Conference (Talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
EGU General Assembly, 27 Apr 2014 - 02 May 2014.
Eprint ID
37205
Cite as
Proksch, M. , Löwe, H. , Weißbach, S. and Schneebeli, M. (2014): The influence of spatial variability of polar firn on microwave emission , EGU General Assembly, 27 April 2014 - 2 May 2014 .


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