Journal of the Atmospheric Sciences: Recent submissions
Now showing items 361-380 of 13215
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The Role of Barotropic versus Baroclinic Feedbacks on the Eddy Response to Annular Mode Zonal Wind Anomalies
(American Meteorological Society, 2022)The annular mode, the leading pattern of low-frequency variability in the extratropics, owes its temporal persistence to a positive feedback between eddy momentum fluxes and the background zonal wind anomalies associated ... -
A Theory for the Hadley Cell Descending and Ascending Edges throughout the Annual Cycle
(American Meteorological Society, 2022)We present a theory for the latitudinal extents of both Hadley cells throughout the annual cycle by combining our recent scaling for the ascending edge latitude based on low-latitude supercriticality with the theory for ... -
A Moist Available Potential Energy Budget for an Axisymmetric Tropical Cyclone
(American Meteorological Society, 2022)The main energy source for the intensification of a tropical cyclone (TC) is widely accepted to be the transfer of energy from the ocean to the atmosphere via surface fluxes. The pathway through which these surface fluxes ... -
Eyewall Asymmetries and Their Contributions to the Intensification of an Idealized Tropical Cyclone Translating in Uniform Flow
(American Meteorological Society, 2022)Scale-dependent processes within the tropical cyclone (TC) eyewall and their contributions to intensification are examined in an idealized simulation of a TC translating in uniform environmental flow. The TC circulation ... -
On the Dynamics of Indian Ocean Teleconnections into the Southern Hemisphere during Austral Winter
(American Meteorological Society, 2022)Stationary Rossby waves, forced by the Indian Ocean dipole (IOD), have an important role in Southern Hemisphere (SH) weather and climate, including promoting Australian drought and driving Antarctic sea ice variations. ... -
Modeling the Shallow Cumulus-Topped Boundary Layer at Gray Zone Resolutions
(American Meteorological Society, 2022)This study investigates simulated fair-weather shallow cumulus-topped boundary layer (SCTBL) on kilometer- and subkilometer-scale horizontal resolutions, also known as the numerical gray zone of boundary layer turbulence. ... -
Organization Development in Precipitating Shallow Cumulus Convection: Evolution of Turbulence Characteristics
(American Meteorological Society, 2022)Horizontal organization or mesoscale variability is an important mechanism in the interaction of the boundary layer with the large-scale conditions. The development of organization in a precipitating cumulus trade wind ... -
Moisture Recharge–Discharge Cycles: A Gross Moist Stability–Based Phase Angle Perspective
(American Meteorological Society, 2022)Moist static energy (MSE) budgets and gross moist stability (GMS) have been widely used as a diagnostic tool to study the evolution of moisture and convection at different time scales. However, use of GMS is limited at ... -
Committor Functions for Climate Phenomena at the Predictability Margin: The Example of El Niño–Southern Oscillation in the Jin and Timmermann Model
(American Meteorological Society, 2022)Many atmosphere and climate phenomena lie in the gray zone between weather and climate: they are not amenable to deterministic forecast, but they still depend on the initial condition. A natural example is medium-range ... -
Observed Subcloud-Layer Moisture and Heat Budgets in the Trades
(American Meteorological Society, 2022)The trade wind subcloud layer is an important structural component of the atmosphere. Its thermodynamic variability has long been characterized using simple frameworks, of which mixed-layer theory is the simplest kind. ... -
The Tropical Diurnal Cycle under Varying States of the Monsoonal Background Wind
(American Meteorological Society, 2022)The impact of the environmental background wind on the diurnal cycle near tropical islands is examined in observations and an idealized model. Luzon Island in the northern Philippines is used as an observational test case. ... -
Water Vapor Transport by an Equivalent-Barotropic Cyclonic Anomaly Corresponding to Extreme Austral Late Summer Precipitation in Southeast Australia during 2021
(American Meteorological Society, 2022)Southeast Australia (SEA) experienced a wet February as well as an extremely wet March accompanied by devastating floods during 2021. Regional water vapor balance analysis at different levels indicates the leading role of ... -
Cloud Droplet Nucleation Simulation and Parameterization
(American Meteorological Society, 2022)Cloud droplet nucleation is classically defined as a droplet growing to a size such that its ambient supersaturation exceeds its surface equilibrium water vapor pressure. Unactivated particles are always in equilibrium ... -
How Close Are Leading Tropical Tropospheric Temperature Perturbations to Those under Convective Quasi Equilibrium?
(American Meteorological Society, 2022)In convective quasi-equilibrium theory, tropical tropospheric temperature perturbations are expected to follow vertical profiles constrained by convection, referred to as A-profiles here, often approximated by perturbations ... -
Acceleration of Tropical Cyclone Development by Cloud-Radiative Feedbacks
(American Meteorological Society, 2022)A complete understanding of the development of tropical cyclones (TC) remains elusive and forecasting TC intensification remains challenging. This motivates further research into the physical processes that govern TC ... -
A Model of the Convectively Coupled Equatorial Rossby Wave over the Indo-Pacific Warm Pool
(American Meteorological Society, 2022)The convectively coupled equatorial Rossby (CCER) wave can significantly affect tropical and extratropical weather, yet its dynamics is not fully understood. Here, a linear two-layer model is proposed for the -
A Satellite Climatology of Relative Humidity Profiles and Outgoing Thermal Radiation over Earth’s Oceans
(American Meteorological Society, 2022)Satellite observations over Earth’s oceans show two distinct regimes in the relationship between sea surface temperatures (SST) and outgoing longwave radiation (OLR): a temperate regime (OLR increases with increasing SST ... -
On the Influence of Surface Latent Heat Fluxes on Idealized Extratropical Cyclones
(American Meteorological Society, 2022)An analysis of the surface latent heat flux (SLHF) influence on the accumulated precipitation associated with an idealized extratropical cyclone using the Coupled Ocean–Atmosphere Mesoscale Prediction System is presented. ... -
QBO Wind Influence on MJO-Induced Temperature Anomalies in the Upper Troposphere and Lower Stratosphere in an Idealized Model
(American Meteorological Society, 2022)The dynamical mechanism by which the quasi-biennial oscillation (QBO) might influence the temperature anomaly, associated with the Madden–Julian oscillation (MJO), in the equatorial upper troposphere and lower stratosphere ... -
Colliding Ice Crystals in Turbulent Clouds
(American Meteorological Society, 2022)Collisions, resulting in aggregation of ice crystals in clouds, is an important step in the formation of snow aggregates. Here, we study the collision process by simulating spheroid-shaped particles settling in turbulent ...