Classifications of Winter Euro-Atlantic Circulation Patterns: An Intercomparison of Five Atmospheric Reanalyses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F17%3A00478484" target="_blank" >RIV/68378289:_____/17:00478484 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10362189

Result on the web

<a href="http://dx.doi.org/10.1175/JCLI-D-17-0059.1" target="_blank" >http://dx.doi.org/10.1175/JCLI-D-17-0059.1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1175/JCLI-D-17-0059.1" target="_blank" >10.1175/JCLI-D-17-0059.1</a>

Result language

angličtina

Original language name

Classifications of Winter Euro-Atlantic Circulation Patterns: An Intercomparison of Five Atmospheric Reanalyses

Original language description

Atmospheric reanalyses have been widely used to study large-scale atmospheric circulation and its links to local weather and to validate climate models. Only little effort has so far been made to compare reanalyses over the Euro-Atlantic domain, with the exception of a few studies analyzing North Atlantic cyclones. In particular, studies utilizing automated classifications of circulation patterns-one of the most popular methods in synoptic climatology-have paid little or no attention to the issue of reanalysis evaluation. Here, five reanalyses [ERA-40, NCEP-1, JRA-55, Twentieth Century Reanalysis, version 2 (20CRv2), and ECMWF twentieth-century reanalysis (ERA-20C)] are compared as to the frequency of occurrence of circulation types (CTs) over eight European domains in winters 1961-2000. Eight different classifications are used in parallel with the intention to eliminate possible artifacts of individual classification methods. This also helps document how substantial effect a choice of method can have if one quantifies differences between reanalyses. In general, ERA-40, NCEP-1, and JRA-55 exhibit a fairly small portion of days (under 8%) classified to different CTs if pairs of reanalyses are compared, with two exceptions: over Iceland, NCEP-1 shows disproportionately high frequencies of CTs with cyclones shifted south- and eastward, over the eastern Mediterranean region, ERA-40 and NCEP-1 disagree on classification of about 22% of days. The 20CRv2 is significantly different from other reanalyses over all domains and has a clearly suppressed frequency of zonal CTs. Finally, validation of 32 CMIP5 models over the eastern Mediterranean region reveals that using different reanalyses can considerably alter errors in the CT frequency of models and their rank. © 2017 American Meteorological Society.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10509 - Meteorology and atmospheric sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Climate

ISSN

0894-8755

e-ISSN

—

Volume of the periodical

30

Issue of the periodical within the volume

19

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

7847-7861

UT code for WoS article

000411436700013

EID of the result in the Scopus database

2-s2.0-85028958375