Cryoconite holes, which can cover 0.1–10% of the surface area of glaciers, are small, water‐filled depressions (typically In situ primary production and respiration in cryoconites during the summer is often comparable with that found in soils in warmer and nutrient richer regions. Considering only glacier areas outside Antarctica and a conservative average cryoconite distribution on glacial surfaces, we found that on a global...