Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1061-1080 of 13215
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Convective Transition Statistics over Tropical Oceans for Climate Model Diagnostics: Observational Baseline
(American Meteorological Society, 2018)AbstractConvective transition statistics, which describe the relation between column-integrated water vapor (CWV) and precipitation, are compiled over tropical oceans using satellite and ARM site measurements to quantify ... -
The Energetics and Magnitude of Hydrometeor Friction in Clouds
(American Meteorological Society, 2018)AbstractAs hydrometeors fall within or from a cloud, they reach a terminal velocity because of friction with the air through which they settle. This friction has previously been shown to result in significant vertically ... -
How Do Environmental Conditions Influence Vertical Buoyancy Structure and Shallow-to-Deep Convection Transition across Different Climate Regimes?
(American Meteorological Society, 2018)AbstractWe developed an entraining parcel approach that partitions parcel buoyancy into contributions from different processes (e.g., adiabatic cooling, condensation, freezing, and entrainment). Applying this method to ... -
Seasonal Winter Forecasts of the Northern Stratosphere and Troposphere: Results from JMA Seasonal Hindcast Experiments
(American Meteorological Society, 2018)AbstractThis study investigates winter forecasts of the northern stratosphere and troposphere using seasonal hindcast experiments of the Japan Meteorological Agency (JMA). A main focus is placed on the seasonal forecasts ... -
Influence of Midlatitude Surface Thermal Anomalies on the Polar Midtroposphere in an Idealized Moist Model
(American Meteorological Society, 2018)AbstractEvidence from models and observations suggests that the vertical distribution of entropy in the extratropical troposphere reflects the horizontal distribution of entropy at the surface. This isentropic linkage, ... -
Mesoscale Ascent in Nocturnal Low-Level Jets
(American Meteorological Society, 2018)AbstractA theory for gentle but persistent mesoscale ascent in the lower troposphere is developed in which the vertical motion arises as an inertia?gravity wave response to the sudden decrease of turbulent mixing in a ... -
Hurricane Kinetic Energy Spectra from In Situ Aircraft Observations
(American Meteorological Society, 2018)AbstractSince the pioneering paper by Nastrom and Gage on aircraft-derived power spectra, significant progress has been made in understanding the wavenumber distribution of energy in Earth?s atmosphere and its implications ... -
On the Dynamics of Tropical Cyclone and Trough Interactions
(American Meteorological Society, 2018)AbstractThe interaction between a tropical cyclone (TC) and an upper-level trough is simulated in an idealized framework using Coupled Ocean?Atmosphere Mesoscale Prediction System (COAMPS) for Tropical Cyclones (COAMPS-TC) ... -
Linear and Nonlinear Dynamics of North Atlantic Oscillations: A New Thinking of Symmetry Breaking
(American Meteorological Society, 2018)AbstractObservations reveal that the North Atlantic Oscillation (NAO) exhibits a strong asymmetry: large amplitude, long persistence, and westward movement in its negative phase (NAO?) and conversely in its positive phase ... -
Descent Rate Models of the Synchronization of the Quasi-Biennial Oscillation by the Annual Cycle in Tropical Upwelling
(American Meteorological Society, 2018)AbstractThe response of the quasi-biennial oscillation (QBO) to an imposed mean upwelling with a periodic modulation is studied, by modeling the dynamics of the zero wind line at the equator using a class of equations known ... -
Dynamics of Extreme Stratospheric Negative Heat Flux Events in an Idealized Model
(American Meteorological Society, 2018)AbstractRecent work has shown that extreme stratospheric wave-1 negative heat flux events couple with the troposphere via an anomalous wave-1 signal. Here, a dry dynamical core model is used to investigate the dynamical ... -
Comparison of Nonlinear Local Lyapunov Vectors and Bred Vectors in Estimating the Spatial Distribution of Error Growth
(American Meteorological Society, 2018)AbstractInstabilities play a critical role in understanding atmospheric predictability and improving weather forecasting. The bred vectors (BVs) are dynamically evolved and flow-dependent nonlinear perturbations, indicating ... -
Assessing Hurricane Rainfall Mechanisms Using a Physics-Based Model: Hurricanes Isabel (2003) and Irene (2011)
(American Meteorological Society, 2018)AbstractWe examine a recently developed physics-based tropical cyclone rainfall (TCR) model and apply it to assess the mechanisms that dominate the magnitude and spatial distribution of TC rainfall, with Hurricanes Isabel ... -
Short-Term Solar Modulation of the Madden–Julian Climate Oscillation
(American Meteorological Society, 2018)AbstractNormalized occurrence rates of daily Madden?Julian oscillation (MJO) events are calculated as a function of phase lag relative to peaks and minima in solar ultraviolet flux occurring on the solar rotational time ... -
Trends of Aerosol Optical Properties over the Heavy Industrial Zone of Northeastern Asia in the Past Decade (2004–15)
(American Meteorological Society, 2018)AbstractThe heavy industrial zone of northeastern Asia is dominated by year-round industrial scattering aerosols that undergo hygroscopic growth in summer. With the rapid economic development over the past decade, aerosol ... -
Moist Adiabats with Multiple Condensing Species: A New Theory with Application to Giant-Planet Atmospheres
(American Meteorological Society, 2018)AbstractA new formula is derived for calculating the moist adiabatic temperature profile of an atmosphere consisting of ideal gases with multiple condensing species. This expression unifies various formulas published in ... -
Variability and Clustering of Midlatitude Summertime Convection: Testing the Craig and Cohen Theory in a Convection-Permitting Ensemble with Stochastic Boundary Layer Perturbations
(American Meteorological Society, 2017)AbstractThe statistical theory of convective variability developed by Craig and Cohen in 2006 has provided a promising foundation for the design of stochastic parameterizations. The simplifying assumptions of this theory, ... -
Influence of the Madden–Julian Oscillation and Caribbean Low-Level Jet on East Pacific Easterly Wave Dynamics
(American Meteorological Society, 2018)AbstractThe east Pacific warm pool exhibits basic-state variability associated with the Madden?Julian oscillation (MJO) and Caribbean low-level jet (CLLJ), which affects the development of easterly waves (EWs). This study ... -
Design and Verification of a New Monochromatic Thermal Emission Component for the I3RC Community Monte Carlo Model
(American Meteorological Society, 2018)AbstractThe Intercomparison of 3D Radiation Codes (I3RC) community Monte Carlo model has been extended to include a source of photon emission from the surface and atmosphere, thereby making it capable of simulating scalar ... -
Precipitation Susceptibility and Aerosol Buffering of Warm- and Mixed-Phase Orographic Clouds in Idealized Simulations
(American Meteorological Society, 2018)AbstractThe sensitivity of warm- and mixed-phase orographic precipitation to the aerosol background with simultaneous changes in the abundance of cloud condensation nuclei and ice nucleating particles is explored in an ...