Southern Ocean

Array locations and simple schematic of water mass overturning transports
September 15, 2020

Kersalé, Meinen, and coauthors investigate the MOC flows at the southern end of the South Atlantic Ocean to evaluate the variability of the oceanic circulation across 34.5°S in the South Atlantic at all depths and at a daily frequency. This research highlights the first-ever daily quantification of the time-varying strength of the abyssal cell at 34.5°S, for which prior studies had only produced once-a-decade "snapshot" ship section estimates.

Zonally averaged multi-model average shortwave low cloud feedbacks
March 25, 2020

Zelinka and coauthors compared ECS values derived from CO2 quadrupling experiments conducted with CMIP6 and CMIP5 models and found that the latest models warm more than their predecessors by about 0.5˚C. The primary culprit for the enhanced warming was shown to be clouds.

Multi-model mean evolution of the Hadley cell edge (defined by streamfunction at 500 hPa) in the 1 percent CO2 increase simulations. Copyright AGU.
January 14, 2020

Under exclusive CO2 forcing, climate models predicted twice as much Hadley cell expansion in the Southern Hemisphere as in the Northern Hemisphere. The finding was robust across models and all seasons except boreal fall.

Monthly mean standardized SST anomalies
April 2, 2018

Using satellite observations from 1982–2017, researchers found that SSTs and global atmospheric teleconnection patterns are significantly correlated to both the Antarctic and the Southern Oscillations.

Southern ocean carbon flux to the atmosphere
January 18, 2018

To better understand climate variability and the Southern Ocean, researchers estimate spatial correlations of ocean properties to reveal how many observing platforms are necessary to adequately observe carbon and heat.

A Southern Ocean polynya
November 2, 2017

Researchers observed a natural, regular, multidecadal oscillation between periods of Southern Ocean open-sea convection, which can act a release valve for the ocean’s heat, and non-convective periods.

Three-dimensional pathways of deep water upwelling from the Atlantic Ocean over Southern Ocean topography
August 16, 2017

A new study combines ocean observations with three state-of-the-art ocean models, revealing the full three-dimensional pathway of deep water to the surface of the Southern Ocean for the first time.

Schematic of the warming response of West Antarctic Peninsula waters to East Antarctic wind perturbation.
July 20, 2017

Ocean melting of marine-terminating ice sheets poses a profound threat to the global coastal environment with approximately five meters of sea level rise locked up in the ice sheets around the West Antarctic region.

Changes in conservative temperature (upper panels; a,b) and absolute salinity (lower panels; c,d) for the periods of 2016−2007 (left panels) and 2007−1994 (right panels) in the Antarctic-Australian Basin
February 8, 2017

A recent investigation has shown that in the abyssal southeast Indian Ocean the Antarctic Bottom Water (AABW) freshening and warming have changed over the last decade. After a third full repeat of line IO8S in the region, GO-SHIP observations suggest strongly accelerated AABW freshening since 2007. 

Sea ice thickness
July 13, 2016

Recent trends in sea ice have been studied heavily. A less well-understood problem is how sea ice affects the underlying ocean, particularly the poorly observed Southern Ocean. A new study, published in the journal Nature Geoscience, shows how the seasonal drift of Antarctic sea ice may be more important for the global ocean overturning circulation than previously realized.

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