Invisible Climate Feedbacks from Microbial Volatile Compounds
C limate change research has traditionally focused on visible and well-quantified Earth system processes such as greenhouse gas emissions, deforestation, melting ice sheets, and changes in atmospheric circulation. However, the Earth’s climate is also influenced by numerous subtle and often invisible biochemical processes that occur at microscopic scales. Among these processes, the emission of microbial volatile organic compounds (mVOCs) represents an emerging but still underappreciated component of global climate feedback mechanisms. Microorganisms, including bacteria, fungi, and archaea, inhabit virtually every ecosystem on Earth. Through their metabolic activities they release a vast array of volatile compounds that easily diffuse through soil pores, water columns, and the atmosphere. These compounds, though produced at microscopic scales, can influence atmospheric chemistry, aerosol formation, cloud condensation processes...