Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbit-spin coupling and the interannual variability of global-scale dust
  storm occurrence on Mars   A new physical hypothesis predicts that a weak coupling of the orbital and
rotational motions of extended bodies may give rise to a modulation of
circulatory flows within their atmospheres. Driven cycles of intensification
and relaxation of large-scale circulatory flows are predicted, with the phasing
of these changes linked directly to the rate of change of the orbital angular
momentum with respect to inertial frames. We test the hypothesis that
global-scale dust storms (GDS) on Mars may occur when periods of circulatory
intensification (associated with positive and negative extrema of the waveform)
coincide with the southern summer dust storm season on Mars. The orbit-spin
coupling hypothesis additionally predicts that the intervening transitional
periods, which are characterized by the disappearance and subsequent sign
change of this waveform, may be unfavorable for the occurrence of GDS, when
they occur during the southern summer dust storm season. These hypotheses are
confirmed through comparisons between calculated dynamical time series of the
time rate of change of orbital angular momentum and historic observations. All
of the nine known global-scale dust storms on Mars took place during Mars years
when circulatory intensification during the dust storm season is predicted
under the orbit-spin coupling hypothesis. No historic global-scale dust storms
were recorded during transitional intervals. Orbit-spin coupling accelerations
evidently contribute to the interannual variability of the Mars atmosphere.

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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys