Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polar Jet Stream Fluctuations in an Energy Balance Model   We investigate the effect of increased greenhouse gas concentrations on the
zonally averaged location of the jet stream boundary of the polar cell in a
latitude dependent, two-layer Energy Balance Model. The model includes separate
terms for atmospheric and surface albedos, and takes into account reflections
of shortwave radiation between the surface and atmospheric layers. We introduce
the notion of a cloud factor function, which depends on temperature gradients,
to simulate the cell structure of Earth's global atmospheric circulation. A
simulation of increased greenhouse gas concentrations initially results in a
poleward movement of the polar jet stream's mean latitude, but as the
concentration increases the jet moves equatorward. When the model takes both
the atmospheric and the surface temperature gradients into account, under high
concentrations the location of the jet stream becomes unstable and
quasi-periodic as its mean location moves equatorward.

26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph