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 4, 2013.
- Koustov Alexandre
- Asgeir Brekke
- Elisa Buforn
- Don Campbell
- Donald Farley
- John C. Foster
- Gregory Good
- Giovanni P. Gregori
- Truls Lynne Hansen
- Olav Holt
- James Hough
- Bengt Hultqvist
- Risto J. Pellinen
- Valery Petrov
- Michael J. Rycroft
- Christian Sucksdorff
- Oleg Troshichev
- Agustin Udias
- Mikhail Uspensky
- José M. Vaquero
- Jozsef Veroe
- Brenton Watkins