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Ji-Eun Kim and M. Joan Alexander

CFSR, the phase speeds of low-frequency waves including Rossby, MRG, and Kelvin waves are very close to the speeds observed in TRMM measurements, but not for the high-frequency waves. It seems that ERA, MERRA, and CFSR can reproduce a realistic signal in low-frequency precipitation with the help of data assimilation of the observed state variables. Although precipitation in reanalyses is a model product, the assimilated control variables such as atmospheric temperature, wind, and humidity constrain

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Gabriela V. Müller and Guillermo J. Berri

persistence ( section 3a ), 2-day persistence ( section 3b ), and 3-day or higher persistence events ( section 3c ). The study includes the analysis of 250-hPa Rossby wave propagation patterns in the Southern Hemisphere associated with each of the above-mentioned groups. Finally, section 4 presents a discussion of results and the conclusions, along with a conceptual model with the purpose of explaining the evolution of large-scale atmospheric circulation patterns that lead to GFs over the Wet Pampa, as

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Ronald B. Smith

jets, gap jets, wakes, thermally driven slope winds, and cold pools. In section 5 , orographic precipitation is summarized. In section 6 , we describe the generation of mountain waves that propagate deep into the upper atmosphere. In section 7 , we consider the global effects of mountains on climate over Earth’s history. 2. Atmospheric reference heights: How high is a mountain? Mountains are usually ranked by their peak heights. Citizens take pride in their nation’s highest peaks. Climbers

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Christian Franzke, Daan Crommelin, Alexander Fischer, and Andrew J. Majda

two dominant regimes, blocked and zonal flows, correspond to fixed points of highly truncated equations for atmospheric flow. On the other hand, studies by Reinhold and Pierrehumbert (1982) , Tung and Rosenthal (1985) , Cehelsky and Tung (1987) , and Majda et al. (2006) find that the distinct flow regimes are not close to the fixed points of the truncated planetary waves. While the above studies focus on the persistent properties of flow fields, there is also a huge body of work whose main

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Olga V. Tweedy, Luke D. Oman, and Darryn W. Waugh

entire stratosphere ( Fueglistaler et al. 2009a ). Furthermore, variations in the radiatively active trace gases (i.e., ozone and water vapor) in the UTLS have a large impact on radiative forcing, influencing surface climate ( Lacis et al. 1990 ; Riese et al. 2012 ) Atmospheric and oceanic oscillations have a significant impact on the dynamics and composition of the UTLS ( Randel and Wu 2015 ; Fueglistaler et al. 2009a ). These oscillations vary on multiple time scales ranging from a few days to

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Ademe Mekonnen and William B. Rossow

characterizing the large-scale atmospheric state and moisture, together with the characteristics of convection from satellite observations. In particular we use the weather state (WS) dataset that was introduced by Jakob and Tselioudis (2003) and Rossow et al. (2005 ; hereafter referred to as RTPJ) . Conventional satellite studies using only infrared brightness temperature anomalies give us a rough estimate of the location and propagation of convection associated with wave disturbances, but, as we show

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Mark A. Donelan, Neils Madsen, Kimmo K. Kahma, Ioannis K. Tsanis, and William M. Drennan

1. Introduction Measurements of flow properties in the atmospheric surface layer over natural wind-generated waves have been made with varying degrees of accuracy over the last few decades. Generally speaking such measurements have been motivated by one of three goals: (i) estimation of interfacial fluxes of momentum, heat, and mass; (ii) exploration of the rate of wave generation by wind; and (iii) investigation of the transmission of electromagnetic radiation in the turbulent near

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S. Srivatsangam

1970 JOURNAL OF THE ATMOSPHERIC SCIENCES VoLvMg33Two Similarities Between Atmospheric Eddies and Linear Baroc!inic Waves S. SRIVATSA.NGAMDe~ artment of Atmospheric Science, Colorado State University, Fort Collins 80523(Manuscript received 18 May 1976, in revised form 18 .June 1976) ABSTRACT Very good agreement is shown to exist between the meridional

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T. J. Herron and H. Montes

JANUARY 1970 T. J. HERRON AND H. MONTES 51Correlation of Atmospheric Pressure Waves with Ionospheric Doppler Signals~ T. J. HERI~ON~ AND H. MONTE$aHudson Laboratories of Columbia University, Dobbs Ferry, N. Y.(Manuscript received 3 July 1969) The high energy disturbance in the South Pacific on 24 August 1968 generated long-period (10-15 rain),high-velocity (600 m sec-~) atmospheric pressure waves

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Curt Covey, Aiguo Dai, Richard S. Lindzen, and Daniel R. Marsh

1. Introduction This paper updates our earlier study of atmospheric tides in climate-oriented general circulation models ( Covey et al. 2011 , hereafter CDML ). The tides interact with surface and higher-altitude processes that play important roles in atmospheric dynamics and climate. CDML found a surprising consistency of model simulations with each other and with observations. The tides are driven in large part by solar heating of the ozone layer, which occurs in the altitude range 30

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