2nd Workshop on Cloud Organization (WCO2)

Session

Deep convection and more

May 18, 2022, 9:15 AM

Public Library (Utrecht)

70. Land effects on organised convection – mechanisms and applications

Cornelia Klein

5/18/22, 9:15 AM

Talk

Different from oceans, the land surface can dry out, creating strong gradients in surface fluxes and temperatures. Characteristics of the land surface affect cloud development and growth through changes in heating and moistening of the lower troposphere, affecting convective stability and inducing mesoscale circulations in areas of differential heating. On larger scales, land surface...

11. Daytime convective development over land: the role of surface forcing

wojciech grabowski (NCAR)

5/18/22, 9:45 AM

Talk

Diurnal cycle of solar radiation over tropical and midlatitude summertime continents forces strong evolution of atmospheric convection. As surface sensible and latent heat fluxes increase after sunrise, a dry convective boundary layer develops in the early morning hours. It proceeds with the formation of shallow convective clouds as the convective boundary layer deepens and may eventually lead...

19. Illuminating the Sub-Mesoscale Structure of Cold Pools with a Dense Station Network during FESSTVaL

Bastian Kirsch (University of Hamburg)

5/18/22, 10:00 AM

Talk

Cold pools are crucial for understanding the organization of atmospheric convection. However, their detailed structure remains a blind spot of operational station networks. In summer 2021 the FESSTVaL field experiment aimed to address this observational gap and shed light on the structure and life cycle of cold pools on the sub-mesoscale (100 m to 10 km). The experiment took place in the rural...

41. The Organization and Vertical Structure of Shallow Convection in Marine Cold-Air Outbreaks, based on the Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE): Observations

Bart Geerts (University of Wyoming)

5/18/22, 10:15 AM

Talk

When cold air blows off boreal continents or the Arctic ice over open water, a well-recognized cloud pattern forms with clouds streets and, further downwind, an open cellular structure. Despite the ubiquity of this cold-air outbreak (CAO) cloud regime over high-latitude oceans, we have a rather poor understanding of its properties, including its macroscale organization. In the 2019-’20 cold...