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Significant wave height and mean direction

Base Time: Mon 23 Aug 2021 12 UTC T+24 Valid time: Tue 24 Aug 2021 12 UTC

At any location over the oceans, a wave field is fully characterised by its 2-dimensional wave spectrum which describes how much wave energy is present for given frequencies and propagation directions. This comprehensive representation is simplified in a set of integrated parameters:
The significant wave height is defined as 4 times the square root of the integral over frequency and direction of the wave spectrum.
The mean wave direction is the spectrally averaged propagation direction of the waves.

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Read our blog for a scientist’s perspective on different areas of ECMWF’s work. Recent posts cover the use of satellite data in weather forecasting and our involvement in European projects to develop global storm-resolving Earth system models and to help prepare the weather and climate community for large-scale machine learning applications.

 

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News highlights January to July 2021

ECMWF news highlights in the first seven months of 2021 include an upgrade of ECMWF’s Integrated Forecasting System; projects and workshops to drive forward weather science; and new developments regarding the EU-funded Copernicus services implemented by ECMWF.

6 August 2021
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APPLICATE project to have lasting effects on polar forecasting

As part of the EU’s Horizon 2020 project APPLICATE, ECMWF has reviewed the challenges that limit forecast skill in Arctic regions. Advances have been made in coupled modelling, process-based diagnostics, and the effective use of observations and data assimilation.

2 August 2021
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Cycle Upgrade 47r2

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ECMWF has implemented an upgrade of its Integrated Forecasting System, including a move from double to single precision and an increase in the vertical resolution of ensemble forecasts. #IFS47r2 #newfcsystem Find out more here: https://www.ecmwf.int/en/about/media-centre/news/2021/forecast-upgrade-i...

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