Temporal evolution of relationships between temperature and circulation modes in five reanalyses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F21%3A00550193" target="_blank" >RIV/68378289:_____/21:00550193 - isvavai.cz</a>

Výsledek na webu

<a href="https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.7474" target="_blank" >https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.7474</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/joc.7474" target="_blank" >10.1002/joc.7474</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temporal evolution of relationships between temperature and circulation modes in five reanalyses

Popis výsledku v původním jazyce

Temporal evolution of relationships between surface temperature and modes of low-frequency circulation variability is compared between five reanalyses (20CRv3, 20CRv2c, ERA-20C, JRA-55, and NCEP-1) in winter from 1958 to 2010 over the northern Extratropics. The relationships are evaluated using 15-year running correlations between temperature anomalies (from the CRU TS v. 4.03 data set) and the intensity of circulation modes (detected in 500 hPa heights by rotated principal component analysis). The analysis, utilizing mean absolute differences between time series of running correlations, points to the large agreement between ERA-20C, JRA-55, and NCEP-1. Circulation modes in those reanalyses are highly similar, which in turn lead to the agreement in temporal development of correlations. In contrast, relationships of some circulation modes with temperature in 20CRv3 and 20CRv2c differ due to differences in the position, strength, and shape of the action centres. This concerns circulation modes located over Eurasia and the Atlantic, mainly North Atlantic Oscillation and Eurasian mode type 1 (EU1). Composite maps, calculated for all running periods, indicate dissimilar temporal evolution of action centres in both 20CR reanalyses. Increased differences in correlations occur mainly during periods when the position and strength of action centres diverge the most. Relationships of circulation modes located over North America and the Pacific with temperature share large resemblance between all reanalyses, including those from the 20CR family. Differences appear to be smaller in 20CRv3 compared to the preceding version, 20CRv2(c), suggesting that the development of the 20CR reanalysis has succeeded in correcting and diminishing biases.

Název v anglickém jazyce

Temporal evolution of relationships between temperature and circulation modes in five reanalyses

Popis výsledku anglicky

Temporal evolution of relationships between surface temperature and modes of low-frequency circulation variability is compared between five reanalyses (20CRv3, 20CRv2c, ERA-20C, JRA-55, and NCEP-1) in winter from 1958 to 2010 over the northern Extratropics. The relationships are evaluated using 15-year running correlations between temperature anomalies (from the CRU TS v. 4.03 data set) and the intensity of circulation modes (detected in 500 hPa heights by rotated principal component analysis). The analysis, utilizing mean absolute differences between time series of running correlations, points to the large agreement between ERA-20C, JRA-55, and NCEP-1. Circulation modes in those reanalyses are highly similar, which in turn lead to the agreement in temporal development of correlations. In contrast, relationships of some circulation modes with temperature in 20CRv3 and 20CRv2c differ due to differences in the position, strength, and shape of the action centres. This concerns circulation modes located over Eurasia and the Atlantic, mainly North Atlantic Oscillation and Eurasian mode type 1 (EU1). Composite maps, calculated for all running periods, indicate dissimilar temporal evolution of action centres in both 20CR reanalyses. Increased differences in correlations occur mainly during periods when the position and strength of action centres diverge the most. Relationships of circulation modes located over North America and the Pacific with temperature share large resemblance between all reanalyses, including those from the 20CR family. Differences appear to be smaller in 20CRv3 compared to the preceding version, 20CRv2(c), suggesting that the development of the 20CR reanalysis has succeeded in correcting and diminishing biases.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/GA17-07043S" target="_blank" >GA17-07043S: Dálkové vazby - hlavní stavební kameny atmosférické cirkulace</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Climatology

ISSN

0899-8418

e-ISSN

1097-0088

Svazek periodika

42

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

4391-4404

Kód UT WoS článku

000730655400001

EID výsledku v databázi Scopus

2-s2.0-85121367046