Diurnal Variations of Coastal Stratus.
TL;DRAbstract
Diurnal dissipation of stratus over and off the southern California and Baja California coasts during two months of July is measured using GOES visual imagery. Morning inland penetration of the eastern stratus margin is favored in coastal valleys and restricted by hills. Afternoon dissipation of the margin away from land usually occurs the length of the coast, with the breadth of clearing being large off southern California, but limited both north of Point Arguello and south of San Diego. Decreased frequency of stratus ceilings in the southern California bight seems to be related to subsidence in the lee of the Santa Ynez Mountains to the north. With 850 mb wind flow from north and east (340-159 deg), which favors lee subsidence, this region was more often stratus free than for flow from south and west (160-339 deg). (Author)
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Diurnal dissipation of stratus over and off the southern California and Baja California coasts during two months of July is measured using GOES visual imagery. Morning inland penetration of the eastern stratus margin is favored in coastal valleys and restricted by hills. Afternoon dissipation of the margin away from land usually occurs the length of the coast, with the breadth of clearing being large off southern California, but limited both north of Point Arguello and south of San Diego. Decreased frequency of stratus ceilings in the southern California bight seems to be related to subsidence in the lee of the Santa Ynez Mountains to the north. With 850 mb wind flow from north and east (340-159 deg), which favors lee subsidence, this region was more often stratus free than for flow from south and west (160-339 deg). (Author)
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