Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Simulation of a Quasi-Tropical Cyclone over the Black Sea   The paper describes results of numerical experiments on the simulation of a
mesoscale quasi-tropical cyclone, a rare event for the Black Sea, with the MM5
regional atmospheric circulation model. General characteristics of the cyclone
and its evolution and physical formation mechanisms are discussed. The balances
of the momentum components have been estimated, and sensitivity experiments
have been performed. It is shown that, according to its main physical
properties and energy supply mechanisms, the cyclone can be related to
quasi-tropical cyclones.

23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol