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Kyong-Hee An, Chi-Yung Tam, and Chung-Kyu Park

affected by tropical heating bias in a GCM. For this purpose, a simple numerical experiment is carried out in which a constant is added to the total diabatic heating output in the tropics, which is “felt” by the dynamics of the model. The impact of heating adjustment is then inferred by comparing this integration with a control run. It will be demonstrated that a correct heating field in the tropics can be instrumental to better NEAM simulations in GCMs. 2. Model experiment and datasets The model being

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Nagio Hirota, Mai Ohta, Yousuke Yamashita, and Masaaki Takahashi

accelerate the polar jet. The weaker EAJS and the stronger polar jet are typical features of a weak EAWM ( Jhun and Lee 2004 ). The variabilities of the Siberian high and the EAWM are also related with the Arctic Oscillation (AO), which is the dominant annular mode of the atmospheric variabilities in the Northern Hemisphere ( Gong et al. 2001 ). Furthermore, diabatic heating associated with convective activities may play a role in EAWM variabilities. Valdes and Hoskins (1989) investigated atmospheric

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Junling Huang and Michael B. McElroy

1. Introduction The Lorenz energy cycle ( Lorenz 1955 ) provides an instructive approach to a quantitative investigation of the energetics of the atmosphere. The uneven spatial distribution of diabatic heating in the atmosphere results in an increase in available potential energy that is converted consequently to kinetic energy maintaining the circulation of the atmosphere against friction. Grounded on this theory, creation of kinetic energy at the expense of available potential energy can be

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Jian Ling and Chidong Zhang

1. Introduction The vertical structure and its evolution of diabatic heating are of great interest to the study of the Madden–Julian oscillation (MJO) ( Madden and Julian 1971 , 1972 ). It was proposed that the slow eastward phase speed of the MJO is related to shallow convective heating ( Lau and Peng 1987 ; Takahashi 1987 ; Chang and Lim 1988 ; Sui and Lau 1989 ). Low-level heating may be more effective than upper-level heating in promoting large-scale moisture convergence in the boundary

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P. H. Haynes and M. E. McIntyre

828 JOURNAL OF THE ATMOSPHERIC SCIENCES VOL. 44, No. 5 On the Evolution of Vorticity and Potential Vorticity in the Presence of Diabatic Heating and Frictional or Other Forces . P. H. HAYNES A~rO M. E. M-INTYREDepartment of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 9EW, England(Manuscript received 19 June 1986, in final form 8 September

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Jie Zhang, Qianrong Ma, Haishan Chen, Siwen Zhao, and Zhiheng Chen

heat flux relates to precipitation and snow cover and influences soil moisture in cold seasons ( Zhang et al. 2018b ). The water vapor flux in summer and its relationship with sensible heat flux over the TP in summer and with the snow cover in spring (May) are illustrated in Fig. 7 . There was a significant loss of snow cover over the western TP in May, which was favorable for increasing temperature and diabatic heating ( Zhao and Qian 2007 ). In addition, diabatic heating could affect

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Jeffrey M. Chagnon and Suzanne L. Gray

1. Introduction Heating and cooling due to diabatic processes result in changes to stratification and generation of flow anomalies through dynamic adjustment toward balance. Such changes are manifest as modifications to the potential vorticity (PV). The consequences of diabatic modification of PV (hereafter diabatic PV) in extratropical cyclones have been investigated in numerous contexts, including rapid cyclogenesis (e.g., Kuo et al. 1991 ; Stoelinga 1996 ; Wernli and Davies 1997

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Alison Ming, Peter Hitchcock, and Peter Haynes

-Interim dataset as shown in Fig. 1a and by Seviour et al. (2012) , as well as in various other reanalysis datasets ( Abalos et al. 2015 ) and coupled chemistry–climate models [Fig. 4.9 in chapter 4 of Butchart et al. (2010b) and Fig. 3 of Butchart et al. (2006) ]. Similar double peaks are present in the diabatic heating rates at these levels in ERA-Interim ( Fueglistaler et al. 2009 ) as shown in Fig. 1b . Fig . 1. Zonally averaged ERA-Interim data from 1991 to 2010. (a) Plots of the mean vertical

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Takenari Kinoshita, Kaoru Sato, Kentaro Ishijima, Masayuki Takigawa, and Yousuke Yamashita

( Brewer 1949 ; Dobson 1956 ). On the other hand, in the steady state, these traditional residual mean meridional and vertical flows are balanced with forcings because of the wave activity flux divergence and diabatic heating rate divided by , respectively: where is the Coriolis parameter, denotes the wave activity flux divergence, and Q is the diabatic heating rate. The relation between the residual mean meridional flow and wave activity flux divergence is used for the concept of downward

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Annalisa Cherchi, H. Annamalai, Simona Masina, and Antonio Navarra

. 2002 ). In boreal summer, subsidence over the eastern Mediterranean (mostly east of 15°E) has been related to the tropical monsoon southeastward ( Hoskins 1996 ; Rodwell and Hoskins 1996 , hereinafter RH96 ) similar to other subtropical regions, such as California and Chile ( Rodwell and Hoskins 2001 , hereinafter RH01 ). In this theory, descent over the Mediterranean is a consequence of the interaction between westward propagating Rossby waves, which are generated by the diabatic heating

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