Assimilation of satellite sounder profiles in NWP

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The motivation for the study was to maximise the amount of information conveyed to the model, particularly regarding water-vapour, and to minimise the computational load during the assimilation process. The experiments were conducted at ECMWF using their operational Integrated Forecast System (IFS). The forecast skills were evaluated against independent reference measurements.

Image of the week: Saharan dust from space

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Desert dust particles are lifted into the atmosphere by gusts of surface wind and can be transported and deposited thousands of kilometres away. 

When Saharan dust travels over populated areas, it can reduce air quality and impact health by causing respiratory problems and cause flight delays. Over the oceans, dust can act as a fertiliser, stimulating blooms of tiny marine plants (phytoplankton) that are the basis for the marine food chain.