![]() ![]() ![]() McKim, B., Bony, S., Saint-Lu, M., and Dufresne, J.-L.: Constraining the tropical anvil cloud "iris" feedback, EGU General Assembly 2023, Vienna, Austria, 24–, EGU23-3896,, 2023. For the purposes of this paper, we use the term anvil cloud to refer to high ice cloud layers that are likely produced by deep convection. We then extend our equation to address whether anvil clouds might affect climate sensitivity through their masking of other forcings or feedbacks. I dont know about clouds but does look good. Owing to this small radiative effect, the observed changes in anvil cloud cover in interannual variability implies an iris feedback that is wholly insufficient to strongly influence climate sensitivity. A classic cumulonimbus anvil cloud from a decaying thunderstorm over Italy. Their net impact on the climate system depends on how much time they spend in their cooling and warming stages. (WMC) - The thunderstorm anvil cloud is a common cloud and they can be spotted on any given hot summer day in the Mid-South. We find that the inferred values of anvil cloud radiative effect and low cloud masking effects sum to 1 Wm -2. Tropical thunderstorms generate expansive cloud systems (anvil clouds) that initially exert a cooling effect but evolve over time to produce a warming effect. We then look at satellite observations to diagnose these quantities. Our equation shows how the feedback is constrained by the fractional change in anvil cloud area, the anvil cloud radiative effect, and the radiative masking of low clouds that live beneath anvils. Here, we construct a simple model of cloud radiative effects to obtain an analytical equation for the tropical anvil area “iris” feedback. We use combined radar-lidar observations and a. An outstanding question in climate science is how much the change in tropical anvil cloud clover with warming influences Earth's climate sensitivity. Anvil clouds originating from deep convection play an important role in the tropical energy balance. ![]()
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