Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Empirical analysis of the solar contribution to global mean air surface
  temperature change   The solar contribution to global mean air surface temperature change is
analyzed by using an empirical bi-scale climate model characterized by both
fast and slow characteristic time responses to solar forcing: $\tau_1 =0.4 \pm
0.1$ yr, and $\tau_2= 8 \pm 2$ yr or $\tau_2=12 \pm 3$ yr. Since 1980 the solar
contribution to climate change is uncertain because of the severe uncertainty
of the total solar irradiance satellite composites. The sun may have caused
from a slight cooling, if PMOD TSI composite is used, to a significant warming
(up to 65% of the total observed warming) if ACRIM, or other TSI composites are
used. The model is calibrated only on the empirical 11-year solar cycle
signature on the instrumental global surface temperature since 1980. The model
reconstructs the major temperature patterns covering 400 years of solar induced
temperature changes, as shown in recent paleoclimate global temperature
records.

23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga