The NPG 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 28, 2021.
- Carsten Abraham
- Maarten Ambaum
- Laurent Bertino
- Marc Bocquet
- Carsten Brandt
- Noah Brenowitz
- Sebastian Buschow
- Magda Carr
- Lixia Chen
- Giuseppe Consolini
- Peter Davies
- Lesley De Cruz
- Paola De Michelis
- Roberto Deidda
- Reik Donner
- Svetlana Dubinkina
- Aihua Fan
- Sergey Frolov
- Gary Froyland
- Dimitrios Giannakis
- Georg Gottwald
- Annalisa Griffa
- Colin Grudzien
- Stephan Hemri
- Tianfeng Hou
- Yu Huang
- Jennifer Hutchings
- Yohai Kaspi
- Dikra Khedhaouiria
- Vassili Kitsios
- Keiichi Kondo
- Dmitri Kondrashov
- Kevin Lamb
- Matthias Lankhorst
- Sebastian Lerch
- Matthew Levine
- Jonathan Lilly
- Valerie N. Livina
- Andrew MacDougall
- Vladimir Maderich
- Line Madsen
- Maha Mdini
- Robert Miller
- Ken Mylne
- Louis-Philippe Nadeau
- Atsushi Okazaki
- Constantinos Papadimitriou
- Joachim Peinke
- S.G. Penny
- Mirko Piersanti
- Jesus Portilla
- Patrick N. Raanes
- Peter L. Read
- valentin resseguier
- Lassi Roininen
- Juan Ruiz
- Manuel Santos Gutiérrez
- Daniel Schertzer
- François G. Schmitt
- Larissa Serdukova
- Zheqi Shen
- Polly Smith
- Elaine Spiller
- Yury Stepanyants
- Remi Tailleux
- Kateryna Terletska
- Bruce Tsurutani
- Andrea Ustra
- Pantelis Vlachas
- Vasiliy I. Vlasenko
- Femke Vossepoel
- Matthias Waechter
- Maximilian Weigand
- Chong Xu
- Zhenhua Xu
- Naiming Yuan
- Andres Zambrano
- Hongqin Zhang
- Banglin Zhang
- Feifan Zhou
- Milija Zupanski
- Dusanka Zupanski