GO-SHIP observations suggest strongly accelerated AABW freshening since 2007.
Deep southeast Indian Ocean waters see accelerated freshening

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.

Global warming and Greenland melting affects Atlantic overturning
Global warming and Greenland melting affects Atlantic overturning

A new study shows that the AMOC is more sensitive to warming, including changes in the atmospheric hydrological cycle, than Greenland Ice Sheet melting. However, Greenland Ice Sheet melt further increases the projected AMOC weakening.

Hurricanes more likely to weaken along the US coast during active periods
Hurricanes more likely to weaken along the US coast during active periods

A new study shows that when conditions in the deep tropics are good for hurricane intensification, they are bad along the US coast. This sets up a barrier around the US coast during active hurricane periods that inhibits hurricanes from strengthening and usually causes them to weaken.

Atlantic heat transport and Agulhas Leakage.
Agulhas leakage, not salinity, linked to the Atlantic meridional circulation slowdown

A new study concludes that the likely source of changes in heat that caused the recent slowdown in the AMOC was from a decrease in the Agulhas Leakage and that changes in convection in the subpolar North Atlantic was an unlikely contributor.

Ocean heat content
A new look at the “global warming hiatus” as a redistribution of energy in the Earth’s system

A new paper shows that global mean surface temperature (GMST) is a measure of the Earth’s surface warming, not a measure of total accumulated heat energy in the Earth’s system. And the slowdown in GMST increase is most likely a redistribution of excess heat into and within the ocean.

Global-mean surface air temperature (SAT) anomalies with respect to a preindustrial reference level.
Paleodata-based global warming projection provides confirmation of CMIP5 estimates

New research looking at glacial-interglacial climate variability during the last 784,000 years finds that Earth's climate sensitivity is strongly dependent on the climate background state with significantly larger values attained during warm phases. Because the Earth is currently in a warm state, the associated increased climate sensitivity has to be taken into account for future warming projections.

Welcome to the US Climate Variability and Predictability Program

Register by March 17 for US AMOC Science Team Meeting

AMOC logo

The 2017 AMOC Science Team Meeting will take place in Santa Fe, New Mexico, from May 23-25, 2017. The meeting will discuss progress made and address emerging science questions related to the Atlantic Meridional Overturning Circulation. Registration closes March 17. 

Welcome new SSC co-chair and Panel members


US CLIVAR welcomes the following new members, who will help science planning and implementation of program goals: Tony Lee, NASA Jet Propulsion Lab (SSC co-chair); Shane Elipot, University of Miami, and Aneesh Subramanian, Scripps Institution of Oceanography (POS Panel members); Victoria Coles, University of Maryland, William Collins, Lawrence Berkeley National Lab & UC-Berkeley, and Samson Hagos, Pacific Northwest National Lab (PSMI Panel members); and Mona Behl, University of Georgia, and Andy Wood, National Center for Atmospheric Research (PPAI Panel members). 

Variations: Forecasting ENSO impacts in the California Current System

El Nino

El Niño-Southern Oscillation (ENSO) events have far-reaching influence on the atmosphere and ocean that can dramatically impact marine ecosystems, including those along the West Coast of North America. The winter edition of Variations, joint with the US Ocean Carbon Biogeochemistry Program, features articles discussing the ability to predict these impacts. Join in for a webinar on February 15 at 12:00 p.m ET to hear the authors discuss their research. 

Abstract deadline Feb. 28 for 2017 Sea Level Rise Conference

Sea level rise will impact coastal communities

The WCRP, jointly with the Intergovernmental Oceanographic Commission of UNESCO, is organizing an international conference on sea level research that will address the existing challenges in describing and predicting regional sea level changes and in quantifying the intrinsic uncertainties. The "Regional Sea Level Changes and Coastal Impacts" conference will be held July 10-14, 2017 at Columbia University in New York. Abstract submissions are due February 28.

Process Study webinar series for 2016/17

cloud convection

The PSMI Panel is organizing a webinar series on proposed and current process studies from November 2016 to March 2017. The goals of this webinar series are to provide feedback on the plans and distill programmatic lessons learned. The webinars are open to the entire community. To see the complete list of process studies and information on how to join, visit the read more link.