Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seamless multi-model postprocessing for air temperature forecasts in
  complex topography   Statistical postprocessing is routinely applied to correct systematic errors
of numerical weather prediction models (NWP) and to automatically produce
calibrated local forecasts for end-users. Postprocessing is particularly
relevant in complex terrain, where even state-of-the-art high-resolution NWP
systems cannot resolve many of the small-scale processes shaping local weather
conditions. In addition, statistical postprocessing can also be used to combine
forecasts from multiple NWP systems. Here we assess an ensemble model output
statistics (EMOS) approach to produce seamless temperature forecasts based on a
combination of short-term ensemble forecasts from a convection-permitting
limited-area ensemble and a medium-range global ensemble forecasting model. We
quantify the benefit of this approach compared to only processing the
high-resolution NWP. We calibrate and combine 2-m air temperature predictions
for a large set of Swiss weather stations at the hourly time-scale. The
multi-model EMOS approach ('Mixed EMOS') is able to improve forecasts by 30\%
with respect to direct model output from the high-resolution NWP. A detailed
evaluation of Mixed EMOS reveals that it outperforms either single-model EMOS
version by 8-12\%. Valley location profit particularly from the model
combination. All forecast variants perform worst in winter (DJF), however
calibration and model combination improves forecast quality substantially.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th