Journal of the Atmospheric Sciences: Recent submissions
Now showing items 761-780 of 13215
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The Tropical Cyclone as a Divergent Source in a Background Flow
(American Meteorological Society, 2020)The interactions between the outflow of a tropical cyclone (TC) and its background flow are explored using a hierarchy of models of varying complexity. Previous studies have established that for a select class of TCs that ... -
Estimating the Maximum Vertical Velocity at the Leading Edge of a Density Current
(American Meteorological Society, 2020)The maximum upward vertical velocity at the leading edge of a density current is commonly <10 m s−1. Studies of the vertical velocity, however, are relatively few, in part owing to the dearth of high-spatiotemporal-resolution ... -
The Non-Traditional Coriolis Terms and Tropical Convective Clouds
(American Meteorological Society, 2020)The full, three-dimensional Coriolis force includes the familiar sine-of-latitude terms as well as frequently dropped cosine-of-latitude terms (Nontraditional Coriolis Terms [NCT]). The latter are often ignored because ... -
Examination of Aerosol-induced Convective Invigoration using Idealized Simulations
(American Meteorological Society, 2020)Idealized large eddy simulations (LES) are performed of deep convective clouds over south Florida to examine the relative role of aerosol-induced condensational versus mixed-phase invigoration to convective intensity and ... -
Possible Dependence of Climate on Atmospheric Mass: A Convection–Circulation–Cloud Coupled Feedback
(American Meteorological Society, 2020)The total mass of the atmosphere [or equivalently, the background surface pressure (SP)] may have varied significantly over the evolutionary histories of Earth and other planets. Atmospheric mass can affect climate by ... -
The Role of Multiscale Interaction in Tropical Cyclogenesis and Its Predictability in Near-Global Aquaplanet Cloud-Resolving Simulations
(American Meteorological Society, 2020)Tropical cyclogenesis (TCG) is a multiscale process that involves interactions between large-scale circulation and small-scale convection. A near-global aquaplanet cloud-resolving model (NGAqua) with 4-km horizontal grid ... -
A Hail Growth Trajectory Model for Exploring the Environmental Controls on Hail Size: Model Physics and Idealized Tests
(American Meteorological Society, 2020)A detailed microphysical model of hail growth is developed and applied to idealized numerical simulations of deep convective storms. Hailstone embryos of various sizes and densities may be initialized in and around the ... -
Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?
(American Meteorological Society, 2020)Numerical simulations of the impact of ultrafine cloud condensation nuclei (CCN) on deep convection are analyzed to investigate the idea proposed by Fan et al. that addition of ultrafine CCN to an otherwise pristine ... -
The Role of Transient Eddies in North Pacific Blocking Formation and Its Seasonality
(American Meteorological Society, 2020)The mechanism of North Pacific (NP) blocking formation is investigated by conducting a reanalysis-based budget analysis of the quasigeostrophic geopotential tendency equation. It is confirmed that the amplification of NP ... -
Kelvin Waves during GOAmazon and Their Relationship to Deep Convection
(American Meteorological Society, 2020)The 2014–15 Observations and Modeling of the Green Ocean Amazon (GOAmazon) field campaign over the central Amazon near Manaus, Brazil, occurred in coordination with the larger Cloud Processes of the Main Precipitation ... -
Long-Term Statistics of Riming in Nonconvective Clouds Derived from Ground-Based Doppler Cloud Radar Observations
(American Meteorological Society, 2020)Riming is an efficient process of converting liquid cloud water into ice and plays an important role in the formation of precipitation in cold clouds. Due to the rapid increase in ice particle mass, riming enhances the ... -
The Role of WISHE in the Rapid Intensification of Tropical Cyclones
(American Meteorological Society, 2020)This study examines the role of surface heat fluxes, particularly in relation to the wind-induced surface heat exchange (WISHE) mechanism, in the rapid intensification (RI) of tropical cyclones (TCs). Sensitivity experiments ... -
Consistent Impacts of Surface Enthalpy and Drag Coefficient Uncertainty between an Analytical Model and Simulated Tropical Cyclone Maximum Intensity and Storm Structure
(American Meteorological Society, 2020)Several previous studies have demonstrated the significant sensitivity of simulated tropical cyclone structure and intensity to variations in surface-exchange coefficients for enthalpy (Ck) and momentum (Cd), respectively. ... -
Contributions of the Liquid and Ice Phases to Global Surface Precipitation: Observations and Global Climate Modeling
(American Meteorological Society, 2020)This study is the first to reach a global view of the precipitation process partitioning, using a combination of satellite and global climate modeling data. The pathways investigated are 1) precipitating ice (ice/snow/graupel) ... -
The Strong Impact of Weak Horizontal Convergence on Continental Shallow Convection
(American Meteorological Society, 2020)Idealized large-eddy simulation (LES) is a basic tool for studying three-dimensional turbulence in the planetary boundary layer. LES is capable of providing benchmark solutions for parameterization development efforts. ... -
How Much Does the Upward Advection of the Supergradient Component of Boundary Layer Wind Contribute to Tropical Cyclone Intensification and Maximum Intensity?
(American Meteorological Society, 2020)Although the development of supergradient winds is well understood, the importance of supergradient winds in tropical cyclone (TC) intensification is still under debate. One view is that the spinup of the eyewall occurs ... -
Unsteady Vortex Behavior in the Asian Monsoon Anticyclone
(American Meteorological Society, 2020)The Asian monsoon anticyclone (AMA), which is primarily driven by the latent heat released by monsoon precipitation, is one of the dominant features of the Northern Hemisphere summer circulation in the upper troposphere ... -
The Impact of Outer-Core Surface Heat Fluxes on the Convective Activities and Rapid Intensification of Tropical Cyclones
(American Meteorological Society, 2020)The rapid intensification (RI) of Typhoon Soudelor (2015) is simulated using a full-physics model. To investigate how the outer-core surface heat fluxes affect tropical cyclone (TC) structure and RI processes, a series of ... -
Sensitivity of MCS Low-Frequency Gravity Waves to Microphysical Variations
(American Meteorological Society, 2020)The sensitivity of low-frequency gravity waves generated during the development and mature stages of an MCS to variations in the characteristics of the rimed ice parameterization were tested through idealized numerical ... -
Impact of the Mesoscale Range on Error Growth and the Limits to Atmospheric Predictability
(American Meteorological Society, 2020)Global numerical weather prediction (NWP) models have begun to resolve the mesoscale k−5/3 range of the energy spectrum, which is known to impose an inherently finite range of deterministic predictability per se as errors ...