Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantifying Nonstationary Radioactivity Concentration Fluctuations Near
  Chernobyl: A Complete Statistical Description   We analyze nonstationary $^{137}$Cs atmospheric activity concentration
fluctuations measured near Chernobyl after the 1986 disaster and find three new
results: (i) the histogram of fluctuations is well described by a log-normal
distribution, (ii) there is a pronounced spectral component with period T=1 y,
and (iii) the fluctuations are long-range correlated. These findings allow us
to quantify two fundamental statistical properties of the data - the
probability distribution and the correlation properties of the time series. We
interpret our findings as evidence that the atmospheric radionuclide
resuspension processes are tightly coupled to the surrounding ecosystems and to
large time scale weather patterns.

37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn