Ozone dry deposition to the sea surface microlayer

As ozone (O3) moves down from the stratosphere to the Earth's surface, this blocker of cancer-causing ultraviolet rays becomes the third most important greenhouse gas and an air pollutant harmful to human health, plant ecosystems, food security and the economy. O3 moves from the air to the Earth's surfaces in a process called dry deposition. Oceans cover 70 % of the Earth's surface and oceanic dry deposition is the largest yet most uncertain depositional sink, mainly due to challenges in measurement. O3-SML is combining modelling and ground-breaking experimental observations to more precisely quantify global ocean deposition flux, reducing the uncertainty in total global O3 dry deposition and informing climate models for improved prediction of future changes.