Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Reanalysis of the October 2016 "Meteotsunami" in British Columbia with
  Help of High-Frequency Radars and Autoregressive Modeling   On October 14th, 2016, the station of Tofino (British Columbia, Canada)
issued the first ever real-time tsunami alert triggered by a coastal
High-Frequency Radar system, based on the identification of abnormal surface
current patterns. The detection occurred in the absence of any reported seismic
event but coincided with a strong atmospheric perturbation, which qualified the
event as meteo-tsunami. We re-analyze this case in the light of a new radar
signal processing method which was designed recently for inverting fast-varying
sea surface currents from the complex voltage time series received on the
antennas. This method, based on an Auto-regressive modeling combined with a
Maximum Entropy Method, yields a dramatic improvement in both the
Signal-to-Noise Ratio and the quality of the surface current estimation for
very short integration time. This makes it possible to evidence the propagation
of a sharp wave front of surface current during the event and to map its
magnitude and arrival time over the radar coverage. We show that the amplitude
and speed of the inferred residual current do not comply with a Proudman
resonance mechanism but are consistent with the propagation of a low-pressure
atmospheric front and wind vectors as revealed by satellite imagery. This
indicates that the event that triggered a tsunami alert is more likely a storm
surge than a true meteo-tsunami. Beyond this specific case, another outcome of
the analysis is the promising use of oceanographic radars as proxy's for the
characterization of atmospheric fronts.

9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org