Surface meteorology impacts the abundance and quality of life on Earth through the transfer and mixing of light, heat, water, carbon dioxide, and other substances controlling the resources for humans, plants, and animals. However, current theories and models fail when airflows and turbulence are weak during calm cloudless nights leaving weather, climate, and air quality forecasts uncertain. This ‘dark side’ has also escaped proper experimental investigation because of insufficient representation of the naturally occurring large variability in atmospheric transport and mixing. DarkMix aims at causing a quantum leap in our understanding of air quality issues and the biogeochemical cycling of carbon, water and heat by giving physically meaningful and societally relevant answers to profound questions such as the exchange of greenhouse gases, hazards from ground fog, urban pollution, and agricultural losses through frost damage. The main objective is to combine the technological innovation of the first ever fiber-optics-based high-resolution environmental sensor for temperature and wind with an innovative theory to create a radically novel framework to answer the above-mentioned standing environmental issues.