Copernicus Publications and the Executive editors of HGSS thank the following colleagues very much for their work in reviewing the manuscripts published in the journal volume 9, 2018.
- Feza Arikan
- Pascal Arnaud
- Florian Bleibinhaus
- Dalia Buresova
- Martin Friedrich
- Ryoichi Fujii
- Joaquim A. Gaspar
- R.Giles Harrison
- Hisashi Hayakawa
- Olav Holt
- Georgia Irby
- Christopher Jones
- Monika Korte
- E Philip Krider
- Juergen Kusche
- Ishii Mamoru
- Christian Marx
- John Milsom
- Roel Nicolai
- Terrance Onsager
- Wayne Orchiston
- Sandro Maria Radicella
- Isabel Reig
- Paolo Spalla
- Richard Thompson
- Alan Thomson
- Hans Volkert
- David Willis
- Axel Wittmann