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- W3100713083 abstract "The evolution of tropical anvil clouds from their origin in deep convective cores to their slow decay determines the climatic effects of clouds in tropical convective regions. Despite the relevance of anvil clouds for climate and responses of clouds to global warming, processes dominating their evolution are not well understood. Currently available observational data reveal instantaneous snapshots of anvil cloud properties, but cannot provide a process-based perspective on anvil evolution. We therefore conduct simulations with the high resolution version of the exascale earth system model in which we track mesoscale convective systems over the tropical Western Pacific and compute trajectories that follow air parcels detrained from peaks of convective activity. With this approach we gain new insight into the anvil cloud evolution both in present day and future climate. Comparison with geostationary satellite data shows that the model is able to simulate maritime mesoscale convective systems reasonably well. Trajectory results indicate that anvil cloud lifetime is about 15 h with no significant change in a warmer climate. The anvil ice mixing ratio is larger in a warmer climate due to a larger source of ice by detrainment and larger depositional growth leading to a more negative net cloud radiative effect along detrained trajectories. However, the increases in sources are counteracted by increases in sinks of ice, particularly snow formation and sedimentation. Furthermore, we find that the mean anvil cloud feedback along trajectories is positive and consistent with results from more traditional cloud feedback calculation methods." @default.
- W3100713083 created "2020-11-23" @default.
- W3100713083 creator A5021801263 @default.
- W3100713083 creator A5024879281 @default.
- W3100713083 creator A5045723322 @default.
- W3100713083 creator A5070016171 @default.
- W3100713083 creator A5077057208 @default.
- W3100713083 date "2021-02-22" @default.
- W3100713083 modified "2023-10-16" @default.
- W3100713083 title "A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate" @default.
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