Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Subharmonic resonance of global climate to solar forcing   It is shown that, the wavelet regression detrended fluctuations of the
monthly global temperature data (land and ocean combined) for the period
1880-2009yy, are completely dominated by one-third subharmonic resonance to
annual forcing (both natural and anthropogenically induced). Role of the
oceanic Rossby waves and the resonance contribution to the El Nino phenomenon
have been discussed in detail.

2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat