Editing Cloud feedback (section)

==== Cloud Amount ====
The [[Cloud cover|area fraction of high clouds]] is also an important part of the LW feedback. A decrease in the area fraction would lead to a more negative feedback.<ref name="Ceppi-2017" />  Two mechanisms can lead to a decrease in the area fraction and therefore a negative feedback.<ref name="Ceppi-2017" /> The warming at the surface decreases the [[Lapse rate|moist adiabat]]  which leads to a decrease of the [[Subsidence (atmosphere)|clear sky subsidence]].<ref name="Jeevanjee-2022">{{Cite journal |last=Jeevanjee |first=Nadir |date=November 2022 |title=Three Rules for the Decrease of Tropical Convection With Global Warming |url=https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022MS003285 |journal=Journal of Advances in Modeling Earth Systems |language=en |volume=14 |issue=11 |doi=10.1029/2022MS003285 |bibcode=2022JAMES..1403285J |issn=1942-2466}}</ref> Since the convective [[mass flux]] has to be equal to the clear sky subsidence it decreases as well and with it potentially the cloud area fraction.<ref name="Jeevanjee-2022" /> Another argument for a smaller area fraction is that the self-aggregation of clouds increases at higher temperatures.<ref name="Ceppi-2017" /> This would lead to smaller convective areas and larger dry areas which increase the radiative longwave cooling, resulting in a negative feedback.<ref name="Ceppi-2017" /> How the area fraction will change is however a topic of ongoing research and discussion.<ref name="Ceppi-2017" /> Since the area fraction of high clouds in models is sensitive, among others to [[Cloud physics|cloud micro physics]]<ref name="Ceppi-2017" />, there are also models which predict an increase in high cloud area fraction<ref name="Zelinka-2010" /> which would lead to a positive feedback.