Środowiskowe Seminarium Fizyki Atmosfery

Organized convection refers to a particular form of atmospheric moist convection that develops through the interaction between convective drafts and the large-scale vertical shear of the horizontal wind, and results in the coherent flow pattern on the mesocale. A classical example is the quasi-two-dimensional squall line, elements of which can be found in many mesoscale convective systems present in the tropics and over summertime continents in midlatitudes. Organized convection typically involves convective and stratiform precipitation, and it has dramatically different impact on the large-scale horizontal momentum budget than ordinary (unorganized, scattered) convection. Despite its arguably important role in the large-scale weather and climate, many aspects of the organized convection are neglected in modern convective parameterizations. This lecture will review some of these aspects and suggest possible approaches for large-scale models that cannot be run at cloud-resolving (or convection-permitting) horizontal resolutions.