Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An intrinsic pink-noise multi-decadal global climate dynamics mode   Understanding multi-decadal variability is an essential goal of climate
dynamics. For example, the recent phenomenon referred to as the "global warming
hiatus" may reflect a coupling to an intrinsic, pre-industrial, multi-decadal
variability process. Here, using a multi-fractal time series method, we
demonstrate that forty-two data sets of seventy-nine proxies with global
coverage exhibit pink noise characteristics on multi-decadal time scales. To
quantify the persistence of this behavior, we examine high-resolution ice core
and speleothem data to find pink noise in both pre- and post-industrial
periods. We examine the spatial structure with Empirical Orthogonal Function
(EOF) analysis of the monthly-averaged surface temperature from 1901 to 2012.
The first mode clearly shows the distribution of ocean heat flux sinks located
in the eastern Pacific and the Southern Ocean, and has pink noise
characteristics on a multi-decadal time-scale. We hypothesize that this pink
noise multi-decadal spatial mode may resonate with externally-driven greenhouse
gas forcing, driving large-scale climate processes.

19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex