Repository for code related to mapping global salt marsh change and the article GLobal hotspots of salt marsh change and carbon emissions: doi.10.1038/s41586-022-05355-z.No new algorithms were developed for this work. The code pertains to the visualization and processing of global anomaly tif outputs from google earth engine. The google earth engine scripts were adapted from scripts used in Lagomasino et al. (2019; DOI 10.1088/1748-9326/aaf0de). Please inquire for additional details.