Differences in climate model simulations
The role of Antarctic sea ice in shaping modern and glacial deep ocean circulation

A recent study investigates the drivers of changes in deep ocean circulation across a range of modern and Last Glacial Maximum (~21000 years ago) climate modeling simulations, revealing biases in Antarctic sea ice formation. 

Schematic of the warming response of West Antarctic Peninsula waters to East Antarctic wind perturbation.
Coastal waves drive Antarctic ocean warming

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.

https://usclivar.org/research-highlights/projected-changes-mid-latitude-atmospheric-circulation-patterns
Projected changes in mid-latitude atmospheric circulation patterns

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

Ocean Circulation Plays an Important Role in Absorbing Carbon from the Atmosphere, NASA Goddard
Efficiency of ocean as a heat sink, atmospheric gases sponge

NASA and MIT scientists found that gases are more easily absorbed over time than heat. As the Atlantic Meridional Overturning Circulation (AMOC) slows down, the ocean absorbs less of both atmospheric gases and heat, though its ability to absorb heat is more greatly reduced.

Precipitation differences between positive and negative AMV
Global impacts of the Atlantic Multidecadal Variability

A multi-model simulation study shows that Atlantic Multidecadal Variability warming drives a modification of the Walker Circulation that creates precipitation anomalies over the whole tropical belt.

SAMOC time series at four latitudes in the South Atlantic
Reconstructing the South Atlantic Meridional Overturning Circulation

A new study reconstructs a century-long South Atlantic Meridional Overturning Circulation index, from 1870 to present, finding it is highly correlated to the observational-based SAMOC time series and the Interdecadal Pacific Oscillation is the leading mode of variability.

Welcome to the US Climate Variability and Predictability Program

Save the date: Ocean mesoscale eddy workshop

ocean eddies

On February 17-18, US CLIVAR will host a workshop to create a shared understanding of ocean mesoscale eddy interactions with the atmosphere. The workshop will be held in conjunction with the 2018 Ocean Sciences Meeting in Portland, Oregon. 

Sea level conference day 5 highlights

Poster award winners

On the fifth day, conference participants — filled with four days of fascinating, relevant, and timely discussions — were able to hear about the latest modeling efforts and different scenarios for the future. 

CLIVAR-relevant sessions at 2017 AGU Fall Meeting

AGU Fall Meeting logo

AGU Fall Meeting will be held this year from December 11 - 15 in New Orleans. In preparation for the meeting, the US CLIVAR Project Office has compiled a condensed list of sessions that are relevant to the community and organized by Panels, Working Groups, and community members. The list of sessions is not intended to be exhaustive but to help digest the collection of the hundreds of sessions and events. 

Sea level conference day 4 highlights

Poster session

The conference rolled into the fourth day wrapping up the contemporary sea level presentations and beginning to address future projections. Participants also heard about the evolving requirements of integrated sea level observations for regional and local decision making. 

Sea level conference day 3 highlights

Plenary speaker

Halfway through the conference, day three brought a series of presentations on the risk, adaptation strategies, and stakeholder needs for coastal zone management. 


Sea level conference day 2 highlights

Benoit Meyssignac

The second day of the conference was dedicated to presentations on contemporary sea level change, ranging from the role of ocean heat content to satellite missions to drivers of the variability of extreme sea levels.

Sea level conference day 1 highlights

Andrea Dutton, U. Florida

The Regional Sea Level Changes and Coastal Impacts conference kicked-off on June 10, starting with past sea level rise and working towards understanding the future. Day 1 conference highlights feature keynote speakers, overview talks, and three sessions on paleo sea level data and modeling, millennial-scale ice sheet and sea level interactions, and contemporary contributions from ice sheets and glaciers.

Live broadcast of two special sessions on August 8

sea ice

As part of the 2017 Summit, we will be broadcasting two special sessions on Tuesday, August 8. The first one is Advances & Challenges in Understanding & Predicting Climate Teleconnections at 10:00am-12:00pm ET and the second one is Polar Sea-Ice & Ocean Interactions at 5:30-7:30pm ET. Check out our webinar page for a list of speakers and details on how to join.