Marek Zreda

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About

Marek Zreda is a pioneering hydrologist and geoscientist renowned for his transformative work in cosmic-ray neutron sensing for soil moisture measurement. His key research areas include environmental physics, hydrology, and the development of novel techniques for monitoring terrestrial water dynamics. Zreda’s major contribution is the invention and refinement of the Cosmic-Ray Neutron Probe (CRNP), a method that uses naturally occurring cosmic-ray neutrons to estimate soil moisture over large, intermediate-scale footprints—bridging the gap between point sensors and satellite remote sensing. His 2021 study on using high-density polyethylene (HDPE) moderators to control the footprint of a COSMOS rover demonstrates his ongoing innovation, enabling more precise, localized soil moisture measurements. With over 32 citations on this specific work and thousands across his career, Zreda’s impact is profound: his CRNP technology has been adopted globally for agricultural, hydrological, and climate research. He is also a key figure in the COSMOS (Cosmic-ray Soil Moisture Observing System) network, a landmark achievement that has standardized soil moisture monitoring worldwide. Zreda’s work continues to empower researchers and students to better understand water cycles, drought, and land-atmosphere interactions.