Arctic

February 13, 2020

A recent study uses large ensembles of an idealized general circulation model to demonstrate how episodic surface warming in the Arctic can lead to delayed responses in the stratosphere that persist for about two months, even in the absence of stationary waves.

Boxplots showing how well model forecasts capture the observations between the two winter seasons, 2016–17 minus 2015–16
September 27, 2018

California precipitation is well forecast when the Arctic Oscillation phase is correctly captured by a state-of-the-art forecast system, GloSea5.

Schematic representation of proposed dynamical mechanisms in summer
September 13, 2018

Researchers conduct a comprehensive review of research on summer weather stalling, focusing on the influence of Arctic amplification and how it could interact with other factors influenced by climate change.

Response in wintertime surface air temperature and surface wind to imposed RCP8.5 sea ice loss over the Barents-Kara sea
August 13, 2018

A new Arctic and mid-latitude interaction study highlights the necessity to use stratosphere-resolving models when identifying the warm Arctic–cold Siberia pattern.

sensible heat and evaporation fluxes in the Arctic Ocean
April 19, 2018

Researchers conclude that changes in sensible heat transfer and evaporation fluxes — in response to strong regional trends in sea ice cover — are becoming increasingly consequential to Arctic climate variability and change. 

Sensitivity of the zonal winds in the Arctic
January 4, 2018

New research shows that regional Arctic temperature swings can influence jet stream positions and speeds but only account for a small fraction of the jet variations, implying other factors are crucial for predicting jet stream behavior. 

https://usclivar.org/research-highlights/understanding-effect-arctic-sea-ice-decline-atlantic-meridional-overturning
September 18, 2017

The Arctic sea ice decline may explain the suggested slow-down of the Atlantic meridional overturning circulation and the persistence of the Warming Hole.

Monthly changes strength of the zonal flow
July 6, 2017

Looking at modeling simulations, researchers explore how various characteristics of the mid-latitude atmospheric circulation evolve over the 21st-century and find that changes are sector-dependent.

Prediction uncertainty associated with model simulations of an ice-free Arctic
August 29, 2016

New research focused on determining how well the occurrence of an ice-free Arctic can be predicted. What the researchers found is that the uncertainty for the prediction of an ice-free Arctic, caused by internal climate variability, amounts to around two decades.

Arctic anomalies
March 24, 2016

Right from the beginning of 2016 new records were set in the Arctic: warmest air temperature on record in both January and February, and the lowest sea ice cover in February. This year’s record high temperature and low sea ice cover increases concerns about what will happen next in the Arctic and globally under a changing climate.

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