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TZID:Pacific/Honolulu
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CLASS:PUBLIC
CREATED:20260612T023714Z
DESCRIPTION:Environmental controls on isolated convection in the Amazon: an observational and numerical modeling study\n\nDr. Leandro Alex Moreira Viscardi\nPostdoctoral Researcher\nAtmospheric Sciences\nUH Manoa.\n\nABSTRACT\nThe Amazon rainforest is a vital component of the global climate system, influencing the hydrological cycle and tropical circulation. However, understanding and modeling the evolution of convection in this region remains a scientific challenge. In this study, we combined recent observations and high-resolution simulations to evaluate the relative importance of different environmental controls on locally-driven convection in the Amazon. Observationally, we assessed the environmental conditions associated with shallow, congestus, and isolated deep convection days during the wet season (December to April), employing data from the GoAmazon (2014-2015) experiment. Composites of deep days show moister than average conditions below 3 km early in the morning. Water vapor convergence increases significantly in the afternoon when the shallow-to-deep convective transition occurs around 16-17 LST. Moreover, afternoon precipitation increases with large-scale vertical velocity, humidity at different levels and periods of the day, and low-level wind shear. Numerical simulations indicated that daytime convection shows a noticeable sensitivity to pre-convective low-level humidity and a weaker response to free troposphere humidity. Vertical wind shear primarily influences ice content, but its role is smaller than that of humidity in the shallow-to-deep convective transition.\n
DTEND;TZID=Pacific/Honolulu:20240919T030000Z
DTSTAMP:20260612T023714Z
DTSTART;TZID=Pacific/Honolulu:20240919T013000Z
LAST-MODIFIED:20260612T023714Z
LOCATION:MSB 100 (Marine Sciences Building)
PRIORITY:5
SEQUENCE:0
SUMMARY;LANGUAGE=en-us:Seminar in Atmospheric Sciences
TRANSP:OPAQUE
UID:178126783442993web-support-l@lists.hawaii.edu
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