Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1021-1040 of 13215
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Kelvin–Helmholtz Waves in Precipitating Midlatitude Cyclones
(American Meteorological Society, 2018)AbstractThis study examines Kelvin?Helmholtz (KH) waves observed by dual-polarization radar in several precipitating midlatitude cyclones during the Olympic Mountains Experiment (OLYMPEX) field campaign along the windward ... -
Radiative Invigoration of Tropical Convection by Preceding Cirrus Clouds
(American Meteorological Society, 2018)AbstractThis work seeks evidence for convective?radiative interactions in satellite measurements, with a focus on the variability over the life cycle of tropical convection in search of the underlying processes at a ... -
An Air Stagnation Index to Qualify Extreme Haze Events in Northern China
(American Meteorological Society, 2018)AbstractStagnation weather affects atmospheric diffusion ability, and hence causes the occurrence of haze events, which have been happening frequently in northern China (NC). This work puts forward an air stagnation index ... -
Multilevel Tower Observations of Vertical Eddy Diffusivity and Mixing Length in the Tropical Cyclone Boundary Layer during Landfalls
(American Meteorological Society, 2018)AbstractThis study analyzes the fast-response (20 Hz) wind data collected by a multilevel tower during the landfalls of Tropical Storm Lionrock (1006), Typhoon Fanapi (1011), and Typhoon Megi (1015) in 2010. Turbulent ... -
The Role of Cold Pools in Tropical Oceanic Convective Systems
(American Meteorological Society, 2018)AbstractThe processes governing organized tropical convective systems are not completely understood despite their important influences on the tropical atmosphere and global circulation. In particular, cold pools are known ... -
Observation of Quasi-2-Day Convective Disturbances in the Equatorial Indian Ocean during DYNAMO
(American Meteorological Society, 2018)AbstractThis study examines the westward-propagating convective disturbances with quasi-2-day intervals of occurrence identified over Gan Island in the central Indian Ocean from mid- to late October 2011 during the Dynamics ... -
Coherent Turbulence in the Boundary Layer of Hurricane Rita (2005) during an Eyewall Replacement Cycle
(American Meteorological Society, 2018)AbstractThe structure of coherent turbulence in an eyewall replacement cycle in Hurricane Rita (2005) is presented from novel airborne Doppler radar observations using the Imaging Wind and Rain Airborne Profiler (IWRAP). ... -
Dynamics of the Transition from Spiral Rainbands to a Secondary Eyewall in Hurricane Earl (2010)
(American Meteorological Society, 2018)AbstractAirborne Doppler radar captured the inner core of Hurricane Earl during the early stages of secondary eyewall formation (SEF), providing needed insight into the SEF dynamics. An organized rainband complex outside ... -
Nondissipative and Dissipative Momentum Deposition by Mountain Wave Events in Sheared Environments
(American Meteorological Society, 2018)AbstractMountain waves (MWs) are generated during episodic cross-barrier flow over broad-spectrum terrain. However, most MW drag parameterizations neglect transient, broad-spectrum dynamics. Here, the influences of these ... -
A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: Algorithm Implementation and Testing
(American Meteorological Society, 2018)AbstractA grid-refinement-based method is implemented in a community atmospheric model to improve the representation of convective boundary layer (CBL) turbulence on gray-zone [i.e., ~O(1) km] grids. At this resolution, ... -
Variations of the Moist Static Energy Budget of the Tropical Indian Ocean Atmospheric Boundary Layer
(American Meteorological Society, 2018)AbstractThe atmospheric circulation depends on poorly understood interactions between the tropical atmospheric boundary layer (BL) and convection. The surface moist static energy (MSE) source (130 W m?2, of which 120 W m?2 ... -
Insights into Atmospheric Predictability through Global Convection-Permitting Model Simulations
(American Meteorological Society, 2018)AbstractGlobal convection-permitting models enable weather prediction from local to planetary scales and are therefore often expected to transform the weather prediction enterprise. This potential, however, depends on the ... -
Extratropical Cyclogenesis Changes in Connection with Tropospheric ENSO Teleconnections to the North Atlantic: Role of Stationary and Transient Waves
(American Meteorological Society, 2018)AbstractThis study investigates mechanisms for changes in wintertime extratropical cyclogenesis over North America and the North Atlantic during different phases of El Niño?Southern Oscillation (ENSO). Insights into the ... -
Spontaneous Emission of Spiral Inertia–Gravity Waves and Formation of Elliptical Eyewalls in Tropical Cyclone–Like Vortices: Three-Dimensional Nonlinear Simulations
(American Meteorological Society, 2018)AbstractAlthough intense tropical cyclones (TCs) are considered to be axisymmetric vortices, observations reveal that they are often highly asymmetric. Better understanding of the underlying asymmetric dynamics is a critical ... -
The Momentum Budget in the Stratosphere, Mesosphere, and Lower Thermosphere. Part II: The In Situ Generation of Gravity Waves
(American Meteorological Society, 2018)AbstractThe contributions of gravity waves to the momentum budget in the mesosphere and lower thermosphere (MLT) is examined using simulation data from the Ground-to-Topside Model of Atmosphere and Ionosphere for Aeronomy ... -
The Momentum Budget in the Stratosphere, Mesosphere, and Lower Thermosphere. Part I: Contributions of Different Wave Types and In Situ Generation of Rossby Waves
(American Meteorological Society, 2018)AbstractA momentum budget is examined in the stratosphere, mesosphere, and lower thermosphere using simulation data over ~11 years from a whole-atmosphere model in terms of the respective contributions of gravity waves ... -
Parameters for the Collapse of Turbulence in the Stratified Plane Couette Flow
(American Meteorological Society, 2018)AbstractWe perform direct numerical simulation of the Couette flow as a model for the stable boundary layer. The flow evolution is investigated for combinations of the (bulk) Reynolds number and the imposed surface buoyancy ... -
The Transition from Downward to Upward Air–Sea Momentum Flux in Swell-Dominated Light Wind Conditions
(American Meteorological Society, 2018)AbstractFifteen hours of consecutive swell data from the experiment Flux, État de la Mer, et Télédétection en Condition de Fetch Variable (FETCH) in the Mediterranean show a distinct upward momentum flux. The characteristics ... -
On the Local View of Atmospheric Available Potential Energy
(American Meteorological Society, 2018)AbstractThe possibility of constructing Lorenz?s concept of available potential energy (APE) from a local principle has been known for some time, but it has received very little attention so far. Yet the local APE density ... -
Ensemble Spread Grows More Rapidly in Higher-Resolution Simulations of Deep Convection
(American Meteorological Society, 2018)AbstractIdealized ensemble simulations of mesoscale convective systems (MCSs) with horizontal grid spacings of 1, 1.4, and 2 km are used to analyze the influence of numerical resolution on the rate of growth of ensemble ...