All‐sky satellite data assimilation at operational weather forecasting centres

AJ Geer, K Lonitz, P Weston… - Quarterly Journal of …, 2018 - Wiley Online Library
This article reviews developments towards assimilating cloud‐and precipitation‐affected
satellite radiances at operational forecasting centres. Satellite data assimilation is moving …

The growing impact of satellite observations sensitive to humidity, cloud and precipitation

AJ Geer, F Baordo, N Bormann… - Quarterly Journal of …, 2017 - Wiley Online Library
Ten years ago, humidity observations were thought to give little benefit to global weather
forecasts. Nowadays, at the European Centre for Medium‐range Weather Forecasts …

Use and impact of Arctic observations in the ECMWF Numerical Weather Prediction system

H Lawrence, N Bormann, I Sandu, J Day… - Quarterly Journal of …, 2019 - Wiley Online Library
This paper presents an assessment of the usage of Arctic atmospheric observations in the
Numerical Weather Prediction (NWP) system of the European Centre for Medium‐Range …

[HTML][HTML] Future observing system simulation experiments

RN Hoffman, R Atlas - Bulletin of the American Meteorological …, 2016 - journals.ametsoc.org
As operational forecast and data assimilation (DA) systems evolve, observing system
simulation experiment (OSSE) systems must evolve in parallel. Expected development of …

Enhancing the impact of IASI observations through an updated observation‐error covariance matrix

N Bormann, M Bonavita, R Dragani… - Quarterly Journal of …, 2016 - Wiley Online Library
This article investigates the use of an updated observation‐error covariance matrix for the
Infrared Atmospheric Sounding Interferometer (IASI) in the European Centre for Medium …

[HTML][HTML] All-sky assimilation of infrared radiances sensitive to mid-and upper-tropospheric moisture and cloud

AJ Geer, S Migliorini, M Matricardi - Atmospheric Measurement …, 2019 - amt.copernicus.org
All-sky assimilation of infrared (IR) radiances has not yet become operational at any weather
forecasting centre, but it promises to bring new observations in sensitive areas and avoid the …

Wind profile satellite observation requirements and capabilities

A Stoffelen, A Benedetti, R Borde… - Bulletin of the …, 2020 - journals.ametsoc.org
The Aeolus mission objectives are to improve numerical weather prediction (NWP) and
enhance the understanding and modeling of atmospheric dynamics on global and regional …

Assimilation of AMSU-A in all-sky conditions

DI Duncan, N Bormann, AJ Geer… - Monthly Weather …, 2022 - journals.ametsoc.org
Radiances from microwave temperature sounders have been assimilated operationally at
ECMWF for two decades, but observations significantly affected by clouds and precipitation …

Calculating the millimetre‐wave scattering phase function of snowflakes using the self‐similar Rayleigh–Gans Approximation

RJ Hogan, R Honeyager, J Tyynelä… - Quarterly Journal of the …, 2017 - Wiley Online Library
Exploitation of millimetre‐wave radiometer and radar observations of ice clouds and snow
requires the ability to model the scattering properties of snowflakes. This article extends the …

Significance of changes in medium-range forecast scores

AJ Geer - Tellus A: Dynamic Meteorology and Oceanography, 2016 - Taylor & Francis
The impact of developments in weather forecasting is measured using forecast verification,
but many developments, though useful, have impacts of less than 0.5% on medium-range …