Global ETD Search
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Showing 1 to 14 of 14 for “"tropical convection"”.
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Downdraft impacts on tropical convection
… the ability for downdrafts to help couple deep convection to high relative-humidity regions in the tropics, and find that entrainment is likely a more important process in this relationship. We discuss the impact of downdrafts in maintaining boundary layer quasi-equilibrium, and find that, in …
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Rain Formation in Shallow Tropical Convection
Despite the time and space constraints placed on the results by the observed evolution of the updrafts, the calculations showed that the process of rain formation in warm convective clouds is simple and efficient, provided that giant and ultragiant CCN are present near cloud base. While more …
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Diurnal cycle of deep tropical convection
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Evaluating CFSv2 Subseasonal Forecast Skill with an Emphasis on Tropical Convection
… in the CFSv2 reforecasts, such as too little convection over tropical land regions and too much convection over oceanic regions. Simulated tropical convection patterns and associated teleconnections degrade with forecast lead time. Large-scale tropical convection in CFSv2 is more stationary …
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On the nature of the atmospheric cloud radiative effect and its impact on tropical convection
Tropical high clouds have been shown to converge radiant energy within the atmosphere. We term this phenomenon the Atmospheric Cloud Radiative Effect (ACRE). The addition of energy unequally in space and time has profound effects on tropical convection. In this thesis, we show that the extra …
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Analysis of precipitation and convection in the west Pacific during the PISTON field campaign
Tropical convection is a meteorological phenomenon with important impacts on the atmosphere, both locally and globally. Consequently, it has been an intensely studied topic for many years. Importantly, several ship-based field campaigns have taken place over tropical oceans. Such field campaigns …
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A Climatological Analysis of Upper-Tropospheric Velocity Potential Fields using Global Weather Reanalysis, 1958-2020
… motion) or suppression (sinking motion) of tropical convection and subsequent weather phenomena dependent on these processes (e.g., tropical cyclones). This study employed three commonly used global weather reanalysis datasets (NCEP/NCAR Reanalysis 1, JMA JRA-55, ECMWF ERA5) to calculate and …
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Sea surface temperature-rainfall relationships and associated ocean-atmosphere coupling mechanisms in the southern African region
… SST anomalies along the east coast and increased tropical airflow. Consequently, moisture convergence and tropical convection are increased over the eastern interior near 20° to 25°S. South of Africa, positive SST anomalies generate surface heat flux anomalies, increasing instability and moisture …
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Physical mechanisms controlling self-aggregation of convection in idealized numerical modeling simulations
… the importance of understanding how and why tropical convection organizes. In this work, the fundamental mechanism underlying the self-aggregation of convection is explored using a cloud resolving model. The objective is to identify and quantify the interactions between the environment and …
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Radiative feedbacks in tropical organized convection and the Madden-Julian oscillation
The organization of tropical deep convection is supported by radiative feedbacks, in which high clouds and moisture anomalies associated with convection imposes anomalous longwave (LW) radiative heating in the atmosphere, further supporting convection. Despite an abundance of studies using …
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Tropical oceanic mesoscale cold pools in observations and models
… mechanisms controlling the life cycle of tropical convective systems. However, few observational techniques are available to routinely observe the properties of cold pools and their association with convection. The primary goal of the first part of this study is to demonstrate a new …
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Investigating tropical cyclone impacts on MJO convection over the Indian Ocean
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Role of multiscale atmospheric conditions in the evolution of convective organization during MJO-1 of DYNAMO/CINDY/AMIE
… from the westerly wind burst. These bursts of convection, especially in the first time period, appeared with periodic dry-air intrusions into the central equatorial Indian Ocean. The changes in the vertical distribution of ice particles indicate that graupel progressively occurred over a …