Sixty Years of Widespread Warming in the Southern Mid- and High-Latitudes (1957-2016)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F19%3A00508309" target="_blank" >RIV/68378289:_____/19:00508309 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.ametsoc.org/doi/10.1175/JCLI-D-18-0565.1" target="_blank" >https://journals.ametsoc.org/doi/10.1175/JCLI-D-18-0565.1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1175/JCLI-D-18-0565.1" target="_blank" >10.1175/JCLI-D-18-0565.1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sixty Years of Widespread Warming in the Southern Mid- and High-Latitudes (1957-2016)

Popis výsledku v původním jazyce

Temperature trends across Antarctica over the last few decades reveal strong and statistically significant warming in West Antarctica and the Antarctic Peninsula (AP) contrasting with no significant change overall in East Antarctica. However, recent studies have documented cooling in the AP since the late 1990s. This study aims to place temperature changes in the AP and West Antarctica into a larger spatial and temporal perspective by analyzing monthly station-based surface temperature observations since 1957 across the extratropical Southern Hemisphere, along with sea surface temperature (SST) data and mean sea level pressure reanalysis data. The results confirm statistically significant cooling in station observations and SST trends throughout the AP region since 1999. However, the full 60-year period shows statistically significant, widespread warming across most of the Southern Hemisphere mid- and high-latitudes. Positive SST trends broadly reflect these warming trends, especially in the mid-latitudes. After confirming the importance of the Southern Annular Mode (SAM) on southern high-latitude climate variability, the influence is removed from the station temperature records, revealing statistically significant background warming across all of the extratropical Southern Hemisphere. Antarctic temperature trends in a suite of climate models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) are then investigated. Consistent with previous work the CMIP5 models warm Antarctica at the background temperature rate that is two times faster than that observed. However, removing the SAM influence from both CMIP5 temperatures and those observed results in Antarctic trends that differ only modestly, perhaps due to natural multidecadal variability remaining in the observations.

Název v anglickém jazyce

Sixty Years of Widespread Warming in the Southern Mid- and High-Latitudes (1957-2016)

Popis výsledku anglicky

Temperature trends across Antarctica over the last few decades reveal strong and statistically significant warming in West Antarctica and the Antarctic Peninsula (AP) contrasting with no significant change overall in East Antarctica. However, recent studies have documented cooling in the AP since the late 1990s. This study aims to place temperature changes in the AP and West Antarctica into a larger spatial and temporal perspective by analyzing monthly station-based surface temperature observations since 1957 across the extratropical Southern Hemisphere, along with sea surface temperature (SST) data and mean sea level pressure reanalysis data. The results confirm statistically significant cooling in station observations and SST trends throughout the AP region since 1999. However, the full 60-year period shows statistically significant, widespread warming across most of the Southern Hemisphere mid- and high-latitudes. Positive SST trends broadly reflect these warming trends, especially in the mid-latitudes. After confirming the importance of the Southern Annular Mode (SAM) on southern high-latitude climate variability, the influence is removed from the station temperature records, revealing statistically significant background warming across all of the extratropical Southern Hemisphere. Antarctic temperature trends in a suite of climate models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) are then investigated. Consistent with previous work the CMIP5 models warm Antarctica at the background temperature rate that is two times faster than that observed. However, removing the SAM influence from both CMIP5 temperatures and those observed results in Antarctic trends that differ only modestly, perhaps due to natural multidecadal variability remaining in the observations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Climate

ISSN

0894-8755

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

24

Strana od-do

6875-6898

Kód UT WoS článku

000486261000001

EID výsledku v databázi Scopus

2-s2.0-85074630096