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Michael G. Bosilovich
,
Ayan H. Chaudhuri
, and
Michel Rixen
Full access
Ayrton Zadra
,
Keith Williams
,
Ariane Frassoni
,
Michel Rixen
,
Ángel F. Adames
,
Judith Berner
,
François Bouyssel
,
Barbara Casati
,
Hannah Christensen
,
Michael B. Ek
,
Greg Flato
,
Yi Huang
,
Falko Judt
,
Hai Lin
,
Eric Maloney
,
William Merryfield
,
Annelize Van Niekerk
,
Thomas Rackow
,
Kazuo Saito
,
Nils Wedi
, and
Priyanka Yadav
Full access
Adrian M. Tompkins
,
María Inés Ortiz De Zárate
,
Ramiro I. Saurral
,
Carolina Vera
,
Celeste Saulo
,
William J. Merryfield
,
Michael Sigmond
,
Woo-Sung Lee
,
Johanna Baehr
,
Alain Braun
,
Amy Butler
,
Michel Déqué
,
Francisco J. Doblas-Reyes
,
Margaret Gordon
,
Adam A. Scaife
,
Yukiko Imada
,
Masayoshi Ishii
,
Tomoaki Ose
,
Ben Kirtman
,
Arun Kumar
,
Wolfgang A. Müller
,
Anna Pirani
,
Tim Stockdale
,
Michel Rixen
, and
Tamaki Yasuda
Open access
Vincent-Henri Peuch
,
Richard Engelen
,
Michel Rixen
,
Dick Dee
,
Johannes Flemming
,
Martin Suttie
,
Melanie Ades
,
Anna Agustí-Panareda
,
Cristina Ananasso
,
Erik Andersson
,
David Armstrong
,
Jérôme Barré
,
Nicolas Bousserez
,
Juan Jose Dominguez
,
Sébastien Garrigues
,
Antje Inness
,
Luke Jones
,
Zak Kipling
,
Julie Letertre-Danczak
,
Mark Parrington
,
Miha Razinger
,
Roberto Ribas
,
Stijn Vermoote
,
Xiaobo Yang
,
Adrian Simmons
,
Juan Garcés de Marcilla
, and
Jean-Noël Thépaut

Abstract

The Copernicus Atmosphere Monitoring Service (CAMS), part of the European Union’s Earth observation program Copernicus, entered operations in July 2015. Implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF) as a truly European effort with over 23,500 direct data users and well over 200 million end users worldwide as of March 2022, CAMS delivers numerous global and regional information products about air quality, inventory-based emissions and observation-based surface fluxes of greenhouse gases and from biomass burning, solar energy, ozone and UV radiation, and climate forcings. Access to CAMS products is open and free of charge via the Atmosphere Data Store. The CAMS global atmospheric composition analyses, forecasts, and reanalyses build on ECMWF’s Integrated Forecasting System (IFS) and exploit over 90 different satellite data streams. The global products are complemented by coherent higher-resolution regional air quality products over Europe derived from multisystem analyses and forecasts. CAMS information products also include policy support such as quantitative impact assessment of short- and long-term pollutant-emission mitigation scenarios, source apportionment information, and annual European air quality assessment reports. Relevant CAMS products are cited and used for instance in IPCC Assessment Reports. Providing dedicated support for users operating smartphone applications, websites, or TV bulletins in Europe and worldwide is also integral to the service. This paper presents key achievements of the CAMS initial phase (2014–21) and outlines some of its new components for the second phase (2021–28), e.g., the new Copernicus anthropogenic CO2 emissions Monitoring and Verification Support capacity that will monitor global anthropogenic emissions of key greenhouse gases.

Free access
Roberto Buizza
,
Paul Poli
,
Michel Rixen
,
Magdalena Alonso-Balmaseda
,
Michael G. Bosilovich
,
Stefan Brönnimann
,
Gilbert P. Compo
,
Dick P. Dee
,
Franco Desiato
,
Marie Doutriaux-Boucher
,
Masatomo Fujiwara
,
Andrea K. Kaiser-Weiss
,
Shinya Kobayashi
,
Zhiquan Liu
,
Simona Masina
,
Pierre-Philippe Mathieu
,
Nick Rayner
,
Carolin Richter
,
Sonia I. Seneviratne
,
Adrian J. Simmons
,
Jean-Noel Thépaut
,
Jeffrey D. Auger
,
Michel Bechtold
,
Ellen Berntell
,
Bo Dong
,
Michal Kozubek
,
Khaled Sharif
,
Christopher Thomas
,
Semjon Schimanke
,
Andrea Storto
,
Matthias Tuma
,
Ilona Välisuo
, and
Alireza Vaselali
Full access
Carlo Buontempo
,
Samantha N. Burgess
,
Dick Dee
,
Bernard Pinty
,
Jean-Noël Thépaut
,
Michel Rixen
,
Samuel Almond
,
David Armstrong
,
Anca Brookshaw
,
Angel Lopez Alos
,
Bill Bell
,
Cedric Bergeron
,
Chiara Cagnazzo
,
Edward Comyn-Platt
,
Eduardo Damasio-Da-Costa
,
Anabelle Guillory
,
Hans Hersbach
,
András Horányi
,
Julien Nicolas
,
Andre Obregon
,
Eduardo Penabad Ramos
,
Baudouin Raoult
,
Joaquín Muñoz-Sabater
,
Adrian Simmons
,
Cornel Soci
,
Martin Suttie
,
Freja Vamborg
,
James Varndell
,
Stijn Vermoote
,
Xiaobo Yang
, and
Juan Garcés de Marcilla

Abstract

The Copernicus Climate Change Service (C3S) provides open and free access to state-of-the-art climate data and tools for use by governments, public authorities, and private entities around the world. It is fully funded by the European Union and implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF) together with public and private entities in Europe and elsewhere. With over 120,000 registered users worldwide, C3S has rapidly become an authoritative climate service in Europe and beyond, delivering quality-assured climate data and information based on the latest science. Established in 2014, C3S became fully operational in 2018 with the launch of its Climate Data Store, a powerful cloud-based infrastructure providing access to a vast range of global and regional information, including climate data records derived from observations, the latest ECMWF reanalyses, seasonal forecast data from multiple providers, and a large collection of climate projections. The system has been designed to be accessible to nonspecialists, offering a uniform interface to all data and documentation as well as a Python-based toolbox that can be used to process and use the data online. C3S publishes European State of the Climate reports annually for policy-makers, as well as monthly and annual summaries that are widely disseminated in the international press. Together with users, C3S develops customized indicators of climate impacts in economic sectors such as energy, water management, agriculture, insurance, health, and urban planning. C3S works closely with national climate service providers, satellite agencies, and other stakeholders on the improvement of its data and services.

Free access
Ariane Frassoni
,
Dayana Castilho
,
Michel Rixen
,
Enver Ramirez
,
João Gerd Z. de Mattos
,
Paulo Kubota
,
Alan James Peixoto Calheiros
,
Kevin A. Reed
,
Maria Assunção F. da Silva Dias
,
Pedro L. da Silva Dias
,
Haroldo Fraga de Campos Velho
,
Stephan R. de Roode
,
Francisco Doblas-Reyes
,
Denis Eiras
,
Michael Ek
,
Silvio N. Figueroa
,
Richard Forbes
,
Saulo R. Freitas
,
Georg A. Grell
,
Dirceu L. Herdies
,
Peter H. Lauritzen
,
Luiz Augusto T. Machado
,
Antonio O. Manzi
,
Guilherme Martins
,
Gilvan S. Oliveira
,
Nilton E. Rosário
,
Domingo C. Sales
,
Nils Wedi
, and
Bárbara Yamada
Full access
William J. Merryfield
,
Johanna Baehr
,
Lauriane Batté
,
Emily J. Becker
,
Amy H. Butler
,
Caio A. S. Coelho
,
Gokhan Danabasoglu
,
Paul A. Dirmeyer
,
Francisco J. Doblas-Reyes
,
Daniela I. V. Domeisen
,
Laura Ferranti
,
Tatiana Ilynia
,
Arun Kumar
,
Wolfgang A. Müller
,
Michel Rixen
,
Andrew W. Robertson
,
Doug M. Smith
,
Yuhei Takaya
,
Matthias Tuma
,
Frederic Vitart
,
Christopher J. White
,
Mariano S. Alvarez
,
Constantin Ardilouze
,
Hannah Attard
,
Cory Baggett
,
Magdalena A. Balmaseda
,
Asmerom F. Beraki
,
Partha S. Bhattacharjee
,
Roberto Bilbao
,
Felipe M. de Andrade
,
Michael J. DeFlorio
,
Leandro B. Díaz
,
Muhammad Azhar Ehsan
,
Georgios Fragkoulidis
,
Sam Grainger
,
Benjamin W. Green
,
Momme C. Hell
,
Johnna M. Infanti
,
Katharina Isensee
,
Takahito Kataoka
,
Ben P. Kirtman
,
Nicholas P. Klingaman
,
June-Yi Lee
,
Kirsten Mayer
,
Roseanna McKay
,
Jennifer V. Mecking
,
Douglas E. Miller
,
Nele Neddermann
,
Ching Ho Justin Ng
,
Albert Ossó
,
Klaus Pankatz
,
Simon Peatman
,
Kathy Pegion
,
Judith Perlwitz
,
G. Cristina Recalde-Coronel
,
Annika Reintges
,
Christoph Renkl
,
Balakrishnan Solaraju-Murali
,
Aaron Spring
,
Cristiana Stan
,
Y. Qiang Sun
,
Carly R. Tozer
,
Nicolas Vigaud
,
Steven Woolnough
, and
Stephen Yeager
Full access
William J. Merryfield
,
Johanna Baehr
,
Lauriane Batté
,
Emily J. Becker
,
Amy H. Butler
,
Caio A. S. Coelho
,
Gokhan Danabasoglu
,
Paul A. Dirmeyer
,
Francisco J. Doblas-Reyes
,
Daniela I. V. Domeisen
,
Laura Ferranti
,
Tatiana Ilynia
,
Arun Kumar
,
Wolfgang A. Müller
,
Michel Rixen
,
Andrew W. Robertson
,
Doug M. Smith
,
Yuhei Takaya
,
Matthias Tuma
,
Frederic Vitart
,
Christopher J. White
,
Mariano S. Alvarez
,
Constantin Ardilouze
,
Hannah Attard
,
Cory Baggett
,
Magdalena A. Balmaseda
,
Asmerom F. Beraki
,
Partha S. Bhattacharjee
,
Roberto Bilbao
,
Felipe M. de Andrade
,
Michael J. DeFlorio
,
Leandro B. Díaz
,
Muhammad Azhar Ehsan
,
Georgios Fragkoulidis
,
Alex O. Gonzalez
,
Sam Grainger
,
Benjamin W. Green
,
Momme C. Hell
,
Johnna M. Infanti
,
Katharina Isensee
,
Takahito Kataoka
,
Ben P. Kirtman
,
Nicholas P. Klingaman
,
June-Yi Lee
,
Kirsten Mayer
,
Roseanna McKay
,
Jennifer V. Mecking
,
Douglas E. Miller
,
Nele Neddermann
,
Ching Ho Justin Ng
,
Albert Ossó
,
Klaus Pankatz
,
Simon Peatman
,
Kathy Pegion
,
Judith Perlwitz
,
G. Cristina Recalde-Coronel
,
Annika Reintges
,
Christoph Renkl
,
Balakrishnan Solaraju-Murali
,
Aaron Spring
,
Cristiana Stan
,
Y. Qiang Sun
,
Carly R. Tozer
,
Nicolas Vigaud
,
Steven Woolnough
, and
Stephen Yeager

Abstract

Weather and climate variations on subseasonal to decadal time scales can have enormous social, economic, and environmental impacts, making skillful predictions on these time scales a valuable tool for decision-makers. As such, there is a growing interest in the scientific, operational, and applications communities in developing forecasts to improve our foreknowledge of extreme events. On subseasonal to seasonal (S2S) time scales, these include high-impact meteorological events such as tropical cyclones, extratropical storms, floods, droughts, and heat and cold waves. On seasonal to decadal (S2D) time scales, while the focus broadly remains similar (e.g., on precipitation, surface and upper-ocean temperatures, and their effects on the probabilities of high-impact meteorological events), understanding the roles of internal variability and externally forced variability such as anthropogenic warming in forecasts also becomes important. The S2S and S2D communities share common scientific and technical challenges. These include forecast initialization and ensemble generation; initialization shock and drift; understanding the onset of model systematic errors; bias correction, calibration, and forecast quality assessment; model resolution; atmosphere–ocean coupling; sources and expectations for predictability; and linking research, operational forecasting, and end-user needs. In September 2018 a coordinated pair of international conferences, framed by the above challenges, was organized jointly by the World Climate Research Programme (WCRP) and the World Weather Research Programme (WWRP). These conferences surveyed the state of S2S and S2D prediction, ongoing research, and future needs, providing an ideal basis for synthesizing current and emerging developments in these areas that promise to enhance future operational services. This article provides such a synthesis.

Free access