n The gaseous envelope surrounding the Earth, divided into five layers: y the troposphere, which contains half of the Earth's atmosphere, the o stratosphere, the mesosphere, the thermosphere and the exosphere, h which is the outer limit of the atmosphere. The dry atmosphere consists almost entirely of nitrogen  and oxygen , together with a number of trace gases such as argon , helium and radiatively active greenhouse gases  such as carbon dioxide   methane , nitrous oxide  and ozone e . In addition, the atmosphere contains the GHG water vapour , whose concentrations are highly variable  as the sources  and sinks  of water vapour show large spatio-temporal variations, and atmospheric temperature exerts a strong constraint on the amount of water vapour e an air parcel can hold.. The atmosphere also contains clouds and daerosols. See also Hydrological cycle. it
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report