Terms of reference
In 2018 we arrive to the 50th edition of the International Liege Colloquium of Ocean Dynamics, a perfect reason to celebrate and review the advances made in studying the oceans during the last several decades. In particular, this edition will be dedicated to long-term studies in oceanography. Our knowledge about the ocean has changed dramatically over these past 50 years, as is the availability and quality of data and tools to study the ocean. The ocean plays a crucial role in the regulation of the Earth’s climate. As climate change poses an unprecedented threat to the Earth environment, studies that focus on the long-term variation of the ocean and its response to climate change have therefore become essential to understand and monitor the Earth climate.
Long-term ocean observing systems are essential to assess the state of the ocean. These data allow to study the evolution of the ocean environment, estimate the rate of recent changes, and determine the influence of climate patterns on the state of the ocean. With several decades of data accessible, at unprecedented temporal and spatial resolutions, remote sensing data have also become essential for the study of long-term changes in the ocean. Re-processing of several decades of Earth Observation data provide a tool for a unique understanding of the evolution of the ocean state.
Ocean reanalyses integrate observations and models to study the ocean and its evolution over recent decades, and provide the most complete estimate of the state of the ocean in space and time. Ocean reanalyses are used as initial conditions for operational estimations of the ocean state, for short-term predictions aiming at studying specific processes, for seasonal and decadal predictions, and for climate-related activities.
Efforts to maintain these long-term initiatives and to make the data easily and openly available to the scientific community have permitted to advance our understanding of the evolution of the ocean over the last decades. These efforts should continue to ensure science-based decisions on the management of our oceans.
We welcome abstracts in the study of the ocean using long-term datasets, based on in situ data, remote sensing data, model simulations and reanalyses. Works that evidence the importance of maintaining in time the in situ and remote sensing datasets, and review studies that provide a perspective of the advancement of science during the last decades using these long-term datasets are also welcome.
- Ocean dynamics & climate change
Studies addressing the impact of climate change on ocean dynamics, and the influence of the ocean on climate.
- Oceanic climate records (datasets, methods and comparisons)
Generic studies about model-based and observation-based datasets (reanalyses, reconstructions), their validation and intercomparisons, and studies about specific methods for multidecadal reanalyses and reconstructions (assimilation, bias corrections and drift corrections). Reprocessing and intercallibration of multi-mission datasets.
- Coastal and regional processes
Studies focusing on long-term variability and local trends of specific regions, including downscaling of large scale climatic processes.
- Trends in polar regions
Abstracts on the trends of ocean and sea ice dynamics of polar regions, influence of climate on their variability and the impact of these regions on the global climate system.
- Biogeochemical processes
Studies about oceanic long-term ecosystem changes induced by climate variability.
- Long-term trends in oceanography (open session)
An open session for all studies on the multidecadal study of the ocean. Abstracts that do not fit in other session can be submitted here.