The ERA5 global reanalysis

H Hersbach, B Bell, P Berrisford… - Quarterly journal of …, 2020 - Wiley Online Library
Abstract Within the Copernicus Climate Change Service (C3S), ECMWF is producing the
ERA5 reanalysis which, once completed, will embody a detailed record of the global …

[HTML][HTML] SEAS5: the new ECMWF seasonal forecast system

SJ Johnson, TN Stockdale, L Ferranti… - Geoscientific Model …, 2019 - gmd.copernicus.org
In this paper we describe SEAS5, ECMWF's fifth generation seasonal forecast system, which
became operational in November 2017. Compared to its predecessor, System 4, SEAS5 is a …

Machine learning for model error inference and correction

M Bonavita, P Laloyaux - Journal of Advances in Modeling …, 2020 - Wiley Online Library
Abstract Model error is one of the main obstacles to improved accuracy and reliability in
numerical weather prediction (NWP) and climate prediction conducted with state‐of‐the‐art …

A baseline for global weather and climate simulations at 1 km resolution

NP Wedi, I Polichtchouk, P Dueben… - Journal of Advances …, 2020 - Wiley Online Library
In an attempt to advance the understanding of the Earth's weather and climate by
representing deep convection explicitly, we present a global, four‐month simulation …

[PDF][PDF] Global stratospheric temperature bias and other stratospheric aspects of ERA5 and ERA5. 1

A Simmons, C Soci, J Nicolas, B Bell, P Berrisford… - 2020 - researchgate.net
The ERA5 analyses of lower stratospheric temperature exhibit a pronounced cold bias for
the years from 2000 to 2006. This is due to specifying background error covariances for the …

How can we improve the seamless representation of climatological statistics and weather toward reliable global K‐scale climate simulations?

D Takasuka, C Kodama, T Suematsu… - Journal of Advances …, 2024 - Wiley Online Library
Toward the achievement of reliable global kilometer‐scale (k‐scale) climate simulations, we
improve the Nonhydrostatic ICosahedral Atmospheric Model (NICAM) by focusing on moist …

Accelerating radiation computations for dynamical models with targeted machine learning and code optimization

P Ukkonen, R Pincus, RJ Hogan… - Journal of Advances …, 2020 - Wiley Online Library
Atmospheric radiation is the main driver of weather and climate, yet due to a complicated
absorption spectrum, the precise treatment of radiative transfer in numerical weather and …

The semiannual oscillation (SAO) in the tropical middle atmosphere and its gravity wave driving in reanalyses and satellite observations

M Ern, M Diallo, P Preusse, MG Mlynczak… - Atmospheric …, 2021 - acp.copernicus.org
Gravity waves play a significant role in driving the semiannual oscillation (SAO) of the zonal
wind in the tropics. However, detailed knowledge of this forcing is missing, and direct …

Investigation of links between dynamical scenarios and particularly high impact of Aeolus on numerical weather prediction (NWP) forecasts

A Martin, M Weissmann, A Cress - Weather and Climate …, 2023 - wcd.copernicus.org
Global wind profiles from the Aeolus satellite mission provide an important source of wind
information for numerical weather prediction (NWP). Data assimilation experiments show …

A momentum budget study of the semi‐annual oscillation in the Whole Atmosphere Community Climate Model

AM Jaison, LJ Gray, S Osprey… - Quarterly Journal of …, 2024 - Wiley Online Library
The representation of the semi‐annual oscillation (SAO) in climate models shows a common
easterly bias of several tens of metres per second compared to observations. These biases …