Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sea Ice Brightness Temperature as a Function of Ice Thickness, Part II:
  Computed curves for thermodynamically modelled ice profiles   Ice thickness is an important variable for climate scientists and is still
difficult to accurately determine from microwave radiometer measurements. There
has been some success detecting the thickness of thin ice and with this in mind
this study attempts to model the thickness-radiance relation of sea ice at
frequencies employed by the Soil Moisture and Ocean Salinity (SMOS) radiometer
and the Advanced Microwave Scanning Radiometer (AMSR): between 1.4 and 89 GHz.
In the first part of the study, the salinity of the ice was determined by a
pair of empirical relationships, while the temperature was determined by a
thermodynamic model. Because the thermodynamic model can be used as a simple
ice growth model, in this, second part, the salinities are determined by the
growth model. Because the model uses two, constant-weather scenarios
representing two extremes ("fall freeze-up" and "winter cold snap"), brine
expulsion is modelled with a single correction-step founded on mass
conservation. The growth model generates realistic salinity profiles, however
it over-estimates the bulk salinity because gravity drainage is not accounted
for. The results suggest that the formation of "skim" on the ice surface is
important in determining the radiance signature of thin ice, especially at
lower frequencies, while scattering is important mainly at higher frequencies
but at all ice thicknesses.

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The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci