Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar Cycle Variations in the Elemental Abundance of Helium and
  Fractionation of Iron in the Fast Solar Wind - Indicators of an Evolving
  Energetic Release of Mass from the Lower Solar Atmosphere   We present and discuss the strong correspondence between evolution of the
emission length scale in the lower transition region and in situ measurements
of the fast solar wind composition during this most recent solar minimum. We
combine recent analyses demonstrating the variance in the (supergranular)
network emission length scale measured by SOHO (and STEREO) with that of the
Helium abundance (from WIND) and the degree of Iron fractionation in the solar
wind (from the ACE and Ulysses). The net picture developing is one where a
decrease in the Helium abundance and the degree of Iron fractionation
(approaching values expected of the photosphere) in the fast wind indicate a
significant change in the process loading material into the fast solar wind
during the recent solar minimum. This result is compounded by a study of the
Helium abundance during the space age using the NASA OMNI database which shows
a slowly decaying amount of Helium being driven into the heliosphere over the
course of the several solar cycles.

24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph