Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlations between hurricane numbers and sea surface temperature: why
  does the correlation disappear at landfall?   There is significant correlation between main development region sea surface
temperature and the number of hurricanes that form in the Atlantic basin. The
correlation between the same sea surface temperatures and the number of
\emph{landfalling} hurricanes is much lower, however. Why is this? Do we need
to consider complex physical hypotheses, or is there a simple statistical
explanation?

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org