Science Highlights

Tropical Pacific Decadal Variability Mechanisms

The Tropical Pacific Decadal Variability (TPDV) Working Group of the CLIVAR Pacific Region Panel recently published a review paper that evaluates our understanding of the mechanisms behind TPDV.  No final consensus exists on the relative importance and efficacy of the mechanisms, but the tropical ocean adjustment to varying wind forcing likely plays a key role in the origin of decadal timescales.  These processes are elucidated in this review paper which is a product of rigorous discussions at several virtual meetings over the span of two years since the working group’s establishment in May 2021. 

Advection-driven marine heatwaves and co-occurring extremes in the Mozambique Channel

Marine heatwaves (MHWs) are events characterized by prolonged and extremely warm ocean conditions, and have been detected in recent decades over many regions of the global ocean. Some recent studies led by D. Mawren and with the contribution from J. Hermes (co-chair of IORP), provide an improved understanding of the important role of horizontal advection, associated with anticyclonic eddies on the evolution of MHWs, as well as the co-occurring extremes in the Mozambique Channel.

Towards Regional Marine Ecological Forecasting Using Global Climate Mode Predictions From Subseasonal to Decadal Time Scales: Bottlenecks and Recommendations

A perspective paper discussing how the research community can promote the enhancement of marine ecosystem forecasting using physical ocean conditions predicted by the GCMs has recently been published in Frontiers in Marine Science by scientists from CLIVAR and PICES communities. 

Intercomparison of submesoscale-permitting realistic ocean models are implemented under cloud-based framework

A cloud-based analysis framework proposed by the Pangeo project was used to systematically assess the realism of the kilometer-scale resolution models, aiming to tackle the existed distribution and analysis challenges of the model output.

The Barents Sea Opening: shifting from a freshwater sink to source for the Arctic Ocean

Recently, together with colleagues, two members from CLIVAR Ocean Model Development Panel (OMDP) conducted a comprehensive analysis on the Arctic sea surface salinity (SSS), liquid freshwater content (LFWC) and freshwater budget by comparing the CMIP6 to the CMIP5 results, showing that the salinity of the Barents Sea Opening is projected to keep declining in the future.

Impact of extratropical thermal forcing in the simulation of tropical Atlantic-Pacific basin interactions

A recent paper on this subject by researchers at the University Complutense of Madrid examines the role of tropical convection, specially the location of the Inter Tropical Convergence Zone (ITCZ), in the occurrence of the two main tropical Atlantic-to-tropical Pacific basin interactions: the equatorial Atlantic to equatorial Pacific teleconnection, and the North Tropical Atlantic to equatorial Pacific teleconnection.

Polar warming and ice free conditions under Paris Agreement thresholds as simulated by CMIP5 and CMIP6 models

Aiming to account for the Polar Amplification, this study used global climate simulations from CMIP5 and CMIP6 to investigate the effects of three different global warming thresholds (1.5 °C, 2 °C and 3 °C) and the projected ice free occurrence of both poles.

Sea surface cooling mechanisms caused by oceanic SACZ episodes at Southwestern Atlantic

A recent study led by Dr Luciano Pezzi, member of the CLIVAR/CliC/SCAR Southern Ocean Region Panel, was published in Climate Dynamics. This work brings a new approach to the study and understanding of the oceanic surface cooling that the oceanic South Atlantic Convergence Zone (SACZ) causes, concerning air-sea interaction processes.