The GC editorial board, the European Geosciences Union, and Copernicus Publications thank the following colleagues very much for their work in reviewing the manuscripts published in the journal volume 4, 2021.
- Martin Archer
- Louise Arnal
- Jean Luc Berenguer
- Thomas Birchall
- Kathryn Boast
- Martin Bohle
- Wendy Bohon
- Istvan Bondar
- Rachel Bosch
- Laura Busato
- Sophie Chiari-Lasserre
- John Coxon
- Nilay Dogulu
- Sara J ElShafie
- Victoria Engelschiøn
- Carrie Ferraro
- Daniel Folha
- Adam Forte
- George Sand França
- Maria da Glória Motta Garcia
- Angel Garcia
- Juliana Garrido Damaceno
- Benjamin Gray
- Laurel Haak
- Gerard Heuvelink
- Anna Hicks
- John K. Hillier
- Peter Howe
- Emanuele Intrieri
- Mark Ireland
- Alik Ismail-Zadeh
- Efthimios Karymbalis
- Chris King (deceased)
- Christian Koeberl
- Anthea Lacchia
- Richard Larson
- R. John Leigh
- Daniela Liggett
- Michael Long
- Nancy Longnecker
- Alexander Lusk
- Lara Mani
- Anita Marshall
- R. Shane McGary
- Edward McGowan
- Fabien Medvecky
- Luca Moratto
- Hazel Napier
- Emer Emily Neenan
- Chris North
- Claire Oswald
- William Parcell
- lino pertile
- Antonio Portas
- Jamie Pringle
- Michael Reiss
- Jen Roberts
- Heidi Roop
- Blair Schneider
- Anders Doksæter Sivle
- Christopher Skinner
- Shiba Subedi
- Kent Syverson
- Susan Tunnicliffe
- Ian Turner
- Clara Vasconcelos
- Aleksander Väljamäe