2019 will be the hundredth anniversary of a new start of international scientific collaborations after the First World War, in particular with the creation of the International Union of Geophysics and Geodesy, its associations, and national committees. It is a remarkable opportunity to celebrate the accomplishments of nonlinear geophysics during this past century, as well as to look forward to the challenges of the next century. It is also a remarkable opportunity to think about NPG's revival and testifies to its importance. NPG is therefore inviting the EGU Richardson medallists to contribute to this issue.

Please note that this special issue is only for invited contributions.

The special issue welcomes contributions presenting advances in, and approaches to, studying, modelling, monitoring, and forecasting of internal waves in stratified estuaries, lakes, and the coastal oсean. The scope of the special issue involves all aspects of ISW generation, propagation, transformation, and the interaction of internal waves with bottom topography and shelf zones, as well as an evaluation of the role of internal waves in sediment resuspension and transport. Breaking of internal waves also drives turbulent mixing in the ocean interior that is important for climate ocean models. Discussion of parameterizations for internal-wave-driven turbulent mixing in global ocean models is also invited

The special issue welcomes contributions presenting advances in, and approaches to, studying, modelling, monitoring, and forecasting of internal waves in stratified estuaries, lakes, and the coastal oсean. The scope of the special issue involves all aspects of ISW generation, propagation, transformation, and the interaction of internal waves with bottom topography and shelf zones, as well as an evaluation of the role of internal waves in sediment resuspension and transport. Breaking of internal waves also drives turbulent mixing in the ocean interior that is important for climate ocean models. Discussion of parameterizations for internal-wave-driven turbulent mixing in global ocean models is also invited

2019 will be the hundredth anniversary of a new start of international scientific collaborations after the First World War, in particular with the creation of the International Union of Geophysics and Geodesy, its associations, and national committees. It is a remarkable opportunity to celebrate the accomplishments of nonlinear geophysics during this past century, as well as to look forward to the challenges of the next century. It is also a remarkable opportunity to think about NPG's revival and testifies to its importance. NPG is therefore inviting the EGU Richardson medallists to contribute to this issue.

Please note that this special issue is only for invited contributions.