Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1381-1400 of 13215
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A New Ice Nucleation Active Site Parameterization for Desert Dust and Soot
(American Meteorological Society, 2016)ased on results of 11 yr of heterogeneous ice nucleation experiments at the Aerosol Interaction and Dynamics in the Atmosphere (AIDA) chamber in Karlsruhe, Germany, a new empirical parameterization framework for heterogeneous ... -
The Interaction between Atmospheric Gravity Waves and Large-Scale Flows: An Efficient Description beyond the Nonacceleration Paradigm
(American Meteorological Society, 2016)ith the aim of contributing to the improvement of subgrid-scale gravity wave (GW) parameterizations in numerical weather prediction and climate models, the comparative relevance in GW drag of direct GW?mean flow interactions ... -
Influence of Tropical Pacific Sea Surface Temperature on the Genesis of Gulf Stream Cyclones
(American Meteorological Society, 2016)his study investigates the relationship between tropical Pacific sea surface temperature (SST) variability and cyclogenesis over the Gulf Stream region of the North Atlantic. A cyclone identification scheme and Lagrangian ... -
Why Do Similar Patterns of Tropical Convection Yield Extratropical Circulation Anomalies of Opposite Sign?
(American Meteorological Society, 2016)ropical precipitation anomalies associated with El Niño and Madden?Julian oscillation (MJO) phase 1 (La Niña and MJO phase 5) are characterized by a tripole, with positive (negative) centers over the Indian Ocean and central ... -
The Impact of Vertical Wind Shear on Hail Growth in Simulated Supercells
(American Meteorological Society, 2016)evere hailstorms produce over $1 billion in insured losses annually in the United States, yet details of a given storm?s hail threat (e.g., maximum hailstone size and total hailfall) remain challenging to forecast. Previous ... -
Modulating Effects of Planetary Wave 3 on a Stratospheric Sudden Warming Event in 2005
(American Meteorological Society, 2017)he Eliassen?Palm flux (EPF) and Plumb?s wave activity flux (WAF) were computed, using ERA-Interim data, to analyze the influence of planetary wave 3 on a stratospheric sudden warming event from 17 February to 15 March 2005 ... -
Sensitivity of Axisymmetric Tropical Cyclone Spinup Time to Dry Air Aloft
(American Meteorological Society, 2016)he sensitivity of tropical cyclone spinup time to the initial entropy deficit of the troposphere is examined in an axisymmetric hurricane model. Larger initial entropy deficits correspond to less moisture above the initial ... -
Estimating Vertical Motion Profile Top-Heaviness: Reanalysis Compared to Satellite-Based Observations and Stratiform Rain Fraction
(American Meteorological Society, 2017)method for representing geographic variability in vertical motion profile top-heaviness in reanalysis data is introduced. The results from this method are compared to a satellite-based method for estimating top-heaviness ... -
Synoptic-Scale Waves in Sheared Background Flow over the Western North Pacific
(American Meteorological Society, 2016)ropical depression (TD)-type waves are the dominant mode of synoptic-scale fluctuations over the western North Pacific. By applying spatiotemporal filters to the observed OLR data and the NCEP?DOE AMIP-II reanalysis data ... -
The Impacts of Dry Dynamic Cores on Asymmetric Hurricane Intensification
(American Meteorological Society, 2016)he fundamental pathways for tropical cyclone (TC) intensification are explored by considering axisymmetric and asymmetric impulsive thermal perturbations to balanced, TC-like vortices using the dynamic cores of three ... -
Quantifying Eddy Feedbacks and Forcings in the Tropospheric Response to Stratospheric Sudden Warmings
(American Meteorological Society, 2016)he equatorward shift of the zonal-mean midlatitude tropospheric jet following a stratospheric sudden warming in a comprehensive stratosphere-resolving model is found to be well quantified by the simple model of tropospheric ... -
Interactions between the MJO, Aerosols, and Convection over the Central Indian Ocean
(American Meteorological Society, 2016)his study examines covariability of boundary layer cloud condensation nuclei (CCN) concentrations [estimated using the GEOS 3D chemical transport model (GEOS-Chem)], convective clouds, precipitation, and lightning observed ... -
Parameterization Sensitivity and Instability Characteristics of the Maximum Sustainable Heat Flux Framework for Predicting Turbulent Collapse
(American Meteorological Society, 2016)maximum sustainable heat flux (MSHF) framework for the collapse of turbulence in the stable boundary layer has been previously studied using a one-dimensional model of Couette flow with parameterized turbulent fluxes. This ... -
Dynamics of Orographic Gravity Waves Observed in the Mesosphere over the Auckland Islands during the Deep Propagating Gravity Wave Experiment (DEEPWAVE)
(American Meteorological Society, 2016)n 14 July 2014 during the Deep Propagating Gravity Wave Experiment (DEEPWAVE), aircraft remote sensing instruments detected large-amplitude gravity wave oscillations within mesospheric airglow and sodium layers at altitudes ... -
Time Scales of Clouds and Cloud-Controlling Variables in Subtropical Stratocumulus from a Lagrangian Perspective
(American Meteorological Society, 2016)he Lagrangian evolution of cloud cover and cloud-controlling variables is well approximated using red noise processes with different autocorrelation time scales for each variable. Trajectories within the subtropical marine ... -
Baroclinic-to-Barotropic Pathway in El Niño–Southern Oscillation Teleconnections from the Viewpoint of a Barotropic Rossby Wave Source
(American Meteorological Society, 2016)he baroclinic-to-barotropic pathway in ENSO teleconnections is examined from the viewpoint of a barotropic Rossby wave source that results from decomposition into barotropic and baroclinic components. Diagnoses using the ... -
Evidence for Gap Flows in the Birch Creek Valley, Idaho
(American Meteorological Society, 2016)field study was conducted of flows in the Birch Creek Valley in eastern Idaho. There is a distinct topographic constriction in the Birch Creek Valley that creates two subbasins: an upper and lower valley. The data were ... -
Explosive Ice Multiplication Induced by Multiplicative-Noise Fluctuation of Mechanical Breakup in Ice–Ice Collisions
(American Meteorological Society, 2016)he number of ice fragments generated by breakup of large graupel in collisions with small graupel fluctuates randomly owing to fluctuations in relative sizes and densities of colliding graupel particles and the stochastic ... -
Relationships between Large Precipitating Systems and Atmospheric Factors at a Grid Scale
(American Meteorological Society, 2016)n this study, TRMM-observed precipitation in the tropics is decomposed according to the horizontal area of radar precipitation features, with special emphasis on large systems (rain area > 104 km2) that contribute roughly ... -
Impact of Upper-Tropospheric Temperature Anomalies and Vertical Wind Shear on Tropical Cyclone Evolution Using an Idealized Version of the Operational GFDL Hurricane Model
(American Meteorological Society, 2016)he GFDL hurricane modeling system, initiated in the 1970s, has progressed from a research tool to an operational system over four decades. This system is still in use today in research and operations, and its evolution ...