Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synoptic circulation patterns during temperature extremes in
  southeastern Europe   This study investigates the synoptic circulation patterns associated with
temperature extremes in southeastern (SE) Europe. Using ERA-Interim reanalysis
data we report on the typical patterns that characterize the middle and upper
tropospheric flow a few days before and during hot and cold extremes. The
analysis is done separately for each season, while a further distinction
between short-lived and persistent extremes reveals differences and
similarities in the associated circulation, as inferred by the spatiotemporal
evolution of Rossby wave packets (RWPs). Finally, the performance of ECMWF
deterministic forecasts is evaluated for persistent cold and hot extremes
during winter and summer respectively. Overall, this work suggests that a
correct representation of the RWP evolution is crucial in determining the
magnitude and persistence of temperature extremes in SE Europe.

15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org