Schematic representation of the atmospheric “non-frontal” component
New perspectives regarding Gulf Stream and Kuroshio Extension influence on the atmosphere

New research illustrates that the key to recognizing the influence of the Gulf Stream and Kuroshio Extension on the seasonal mean and longer-term climate is through a proper understanding of how the ocean influences atmospheric fronts.

Boxplots showing how well model forecasts capture the observations between the two winter seasons, 2016–17 minus 2015–16,
California winter precipitation linked to the Arctic Oscillation

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.
The influence of Arctic amplification on mid-latitude summer circulation

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.

Subsurface ocean heat content anomalies regressed onto low-pass filtered time series of eastern tropical Pacific sea surface temperature anomalies. The black boxes outline the eastern (10°–20°S, 100°–120°E) and western (10°–20°S, 50°–90°E) Indian Ocean, showing the east-west dipole structure
Pacific influences decadal Indian Ocean heat content via two distinct mechanisms

In two recent papers, Jin and coauthors investigated how decadal variations of subsurface ocean heat content (50–300 m) in the Indian Ocean respond to conditions in the Pacific region.

simple linear model accounting for changes in drying ratio and mean source distance (MSD)
Global patterns of evaporation and precipitation leave a traceable isotopic fingerprint

A new study shows that a simple linear model that accounts for changes in mean source distance, as well as the local drying ratio, can successfully replicate water isotopic variations in space and time.

The Observational Large Ensemble (Obs-LE) can be used to assess the relative roles of internal variability and anthropogenic influence on 50-year trends in (a-b) temperature and (c-d) precipitation over land.
Developing Observational Large Ensembles for climate variability

Researchers have developed a complementary approach to creating ensembles for seasonal-average temperature and precipitation over land that can also be used to study internal variability.

Welcome to the US Climate Variability and Predictability Program

The Large Ensembles Workshop

Globe and trend lines for earth system modeling

Registration and abstract submission is open for The Large Ensembles Workshop, July 24-26, 2019, at the NCAR Mesa Lab in Boulder, Colorado. We seek participation of scientists across disciplines who are interested in using large initial-condition ensembles with Earth System Models to understand natural climate variability, anthropogenic climate change, and their impacts. Applications and abstracts are due March 8.

Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans

clouds over the ocean, credit: JAMSTEC

Abstract submission deadline extended to Friday, January 25.

Register to attend the joint US and International CLIVAR Workshop, May 7–9, 2019, in Boulder, Colorado. Participants will consider progress and lessons from past 30 years of research in atmospheric convection and air-sea interactions over the tropical oceans, identify outstandging questions, and propose future process studies to address them. Abstracts are due January 25. 

Call for new US CLIVAR Panel members

US CLIVAR Summit

Nomination deadline extended to Friday, January 25. 

The US CLIVAR Scientific Steering Committee seeks qualified individuals to serve on its three subsidiary panels. Panel members formulate science goals and implementation strategies, catalyze and coordinate activities, and work with agencies and international partners to advance the progress of the climate research community. Nominations or self-nominations are now due January 25, 2019.