New data systems and products at the Permanent Service for Mean Sea Level (https://www.psmsl.org/) S. J. Holgate, A. Matthews, P. L. Woodworth, L. Rickards, M. E. Tamisiea, E. Bradshaw, P. R. Foden, K. M. Gordon, S. Jevrejeva, and J. Pugh https://doi.org/10.2112/JCOASTRES-D-12-00175.1

The Global Streamflow Indices and Metadata Archive (GSIM) - Part 2: Time Series Indices and Homogeneity Assessment L. Gudmundsson, H. X. Do, M. Leonard, and S. Westra https://doi.org/10.1594/PANGAEA.887470

GEBCO 2021 Grid - a continuous terrain model of the global oceans and land GEBCO Compilation Group https://doi.org/10.5285/c6612cbe-50b3-0cff-e053-6c86abc09f8f

Coastal applications from nadir altimetry: Example of the X-TRACK regional products (http://ctoh.legos.obs-mip.fr/) F. Birol, N. Fuller, F. Lyard, M. Cancet, F. Nino, C. Delebecque, S. Fleury, F. Toublanc, A. Melet, M. Saraceno, and F. Leger https://doi.org/10.1016/j.asr.2016.11.005

Application of the cross wavelet transform and wavelet coherence to geophysical time series (http://grinsted.github.io/wavelet-coherence/) A. Grinsted, J. C. Moore, and S. Jevrejeva https://doi.org/10.5194/npg-11-561-2004