Scientists using data from the Copernicus Sentinel-5P satellite have noticed a strong reduction of ozone concentrations over the Arctic. Unusual atmospheric conditions, including freezing temperatures in the stratosphere, have led ozone levels to plummet – causing a 'mini-hole' in the ozone layer.
Nature Climate Change, Published online: 17 February 2020; doi:10.1038/s41558-020-0699-y Anthropogenic aerosols mask some greenhouse warming via radiation scattering and cloud interactions. Research suggests the economic impact of this aerosol-induced cooling was small globally, although it benefitted developing countries in warm climates and harmed high-latitude developed countries.
Nature Climate Change, Published online: 17 February 2020; doi:10.1038/s41558-020-0713-4 Climate change has led to earlier spring leaf-out in northern temperate and boreal regions. This advanced leaf-out causes warming in the Northern Hemisphere due to the combined effects of water vapour, cloud and snow-albedo feedbacks on the surface energy budget.
Nature Climate Change, Published online: 17 February 2020; doi:10.1038/s41558-020-0714-3 Atmospheric aerosols have probably masked a significant portion of the greenhouse-gas-induced warming so far. Research now shows that this also may have masked some of the world's increasing economic inequality.
Nature Climate Change, Published online: 17 February 2020; doi:10.1038/s41558-020-0706-3 Temperature affects the metabolic rates of species, their feeding interactions and their ability to persist in a given environment. Now research suggests that different effects of temperature on consumers and resources could cause food webs in cold climates to become less vulnerable to species loss, whereas tropical communities may be more vulnerable as temperatures climb.