Copernicus Publications and the Chief editors of EJM thank the following referees very much for their work in reviewing manuscripts submitted for publication in the journal volume 33, 2021.
- Masahide Akasaka
- Daniele Antonangeli
- Philippe Audra
- Anne-Line Auzende
- Hélène Balcone-Boissard
- Valentin Basch
- Claudia Belviso
- Alfons Berger
- Giovanni Birarda
- Tamás Biró
- Nathalie Bolfan-Casanova
- Bernard BONIN
- Sergey Britvin
- Marco Bruno
- G. C. Capitani
- Georgios Chryssikos
- Nikita V. Chukanov
- Philippe Colomban
- Javier Cuadros
- Bertrand Devouard
- Susannah Dorfman
- Hans-Peter Ebert
- Remi Freydier
- Diego Gatta
- Clemence Gausse
- Jörg Geldmacher
- Della Ventura Giancarlo
- Tommaso Giovanardi
- Rodney Grapes
- Nadezhda Gribchenkova
- Bernard Grobéty
- Michel Grégoire
- Frank Hawthorne
- Yuji Higo
- Ulf Hålenius
- John Jaszczak
- Jan Jehlicka
- Åke Johansson
- Michael Jollands
- Tomoo Katsura
- Stefan Kiefer
- Andrey Korsakov
- Fatma Kourim
- Filip Košek
- Sergey Krivovichev
- Ilya Kupenko
- Pierre Lefèvre
- Erell Leocat
- Eugen Libowitzky
- Richard Livingston
- Paolo Lotti
- Annalisa Martucci
- Nobuyoshi Miyajima
- Eduardo Molina
- Yves Moëlo
- Axel Müller
- Paolo Nimis
- Maribel Núñez Valdez
- Alexander Ordosch
- José Alberto Padrón-Navarta
- Marco Pasero
- Anne Peslier
- Isabella Pignatelli
- Alain Plouffe
- John Puffer
- Can RAO
- Mathieu Rospabé
- Maxim Rudmin
- Bernhard Schulz
- Jiří Sejkora
- Henrik Skogby
- Sergio Speziale
- Christopher Stefano
- Krister Sundblad
- Matthew Tarling
- Elizabeth Thompson
- Peter Tollan
- Cristobal Verdugo-Escamilla
- Giovanna Vezzalini
- Yanbin Wang
- Penny Wieser
- JANINA Wiszniewska
- Alan Woodland
- Bin Wu
- Mingqian Wu
- Luca Ziberna