Finally, the preface “Hydrological processes across climatic and geomorphological gradients of Latin America” was published on November 12th 2019 for the Hydrological Processes Special Issue .

In this special issue of Hydrological Processes, we showcase the variety of ongoing research in catchments of the hydrometeorological, geomorphological and biogeographical mega-diverse region of Latin America and the Caribbean (LAC). The papers of this special issue address hydrological processes that regulate storage, mixing, and fluxes of water and solutes from the driest Atacama Desert in Chile (annual precipitation lower than 10 mm in some places) to the wettest mountainous areas of Central America (annual rainfall up to 8000 mm), including the richest biodiversity on Earth present in the Amazon. Not only are tropical rainforest ecosystems poorly represented in hydrologic research, the LAC contains a myriad of unique lowland to montane ecosystems across the climate gradient that also includes snow and ice processes. Opportunities to advance understanding of how vegetation and landforms redistribute moisture abound in the remote reaches of Latin America.

There are three major transcending themes covered in this SI: 1) Hydrological processes across climate gradients 2) Unique ecosystems with limited hydrological research 3) Effects of land use change on hydrology