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Li-Huan Hsu, Shih-Hao Su, Robert G. Fovell, and Hung-Chi Kuo

stretching on the lee side of the CMR may lead to the DTs of typhoons. In addition to its mechanical effects, topographically modulated diabatic heating may also play an important role in influencing TC motion ( Chang 1982 ; Chan et al. 2002 ; Wang et al. 2012 , 2013 ). Topographically phase-locked, convective diabatic heating induced by the TC circulation impacting the CMR can significantly alter the TC track ( Hsu et al. 2013 , hereafter H13 ; Tang and Chan 2014 , 2015 ). H13 also suggested the

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Edmund K. M. Chang

of surface temperature and moisture. Mountains directly impact atmospheric flow by exciting stationary waves, whereas asymmetries in surface temperature (especially SST) and moisture manifest themselves in the asymmetrical distribution of diabatic heating. While the true forcings are due to orography and surface properties, in a modeling context, the problem is often recast as forcings owing to orography and diabatic heating, even though (as will be elaborated below) diabatic heating is dependent

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Yuqing Wang

eyewall buoyancy/convection and thus the TC intensity will be reduced ( Barnes et al. 1983 ; Powell 1990a , b ). Another thermodynamic effect that will be discussed in this study is the hydrostatic adjustment associated with the net diabatic heating in outer spiral rainbands and anvil clouds. Such heating outside the eyewall may cause pressure to fall in the lower troposphere and reduce the pressure gradient across the eyewall, which will weaken the tangential wind near the RMW but increase the size

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Yuh-Lang Lin

15 JULY' 1990YUH-LANG LIN1755A Theory of Cyclogenesis Forced by Diabatic Heating. Part II: A Semigeostrophic Approach YUH-LANG LINDepartment of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina(Manuscript received 27 July 1989, in final form 15 February1990)ABSTRACT A linear quasi-geostrophic theory of coastal cyclogenesis proposed by Lin has been extended by a semigeostrophic model. The response of an east

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Kamal Puri and M. J. Miller

Although diabatic processes play an important role in the tropical circulation, current analysis schemes andnumerical weather prediction models are unable to adequately include diabatic heating information. In thispaper, procedures for using outgoing longwave radiation data as proxy data for diabatic heating rates and toinitialize the moisture field are proposed. The feasibility of using this data in the ECMWF data assimilationsystem is demonstrated, and it is further shown that using appropriate

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Ching-Yee Chang, Sumant Nigam, and James A. Carton

deficiencies on surface winds is computed using a steady, linearized dynamical core of an AGCM. The diagnostic model is described in section 2 along with the datasets used in this study. The seasonal evolution of westerly wind, precipitation, and diabatic heating biases and related evidence that prompted the hypothesis on the controlling influence of Amazonian convection is presented in section 3 . Dynamical diagnosis of the CAM3 westerly bias in equatorial Atlantic surface winds, including those

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Harold J. Edmon Jr. and Dayton G. Vincent

MARCH 1979 HAROLD Jo EDMON, JR., AND DAYTON G. VINCENT 295Large-Scale Atmospheric Conditions During the Intensification of Hurricane Carmen (1974) II. Diabatic Heating Rates and Energy BudgetsHAROLD J. EDMON, JR.,1 AND DAYTON G. VINCENTDepartment of Geosciences, Purdue University, West Lafayette, IN 47907(Manuscript received 27 March 1978, in revised form 6 November 1978) ABSTRACT A

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Chanil Park, Seok-Woo Son, and Jung-Hoon Kim

eastern China. However, the diabatic forcing, mostly due to latent heating, is not independent of the dynamic forcing. In fact, the dynamic vertical motion induced by the Q-vector convergence stimulates the low-level moisture convergence and latent heating, and this further strengthens dynamic forcing through a nonlinear interaction ( Grams et al. 2011 ; Fink et al. 2012 ; Chagnon et al. 2013 ). Previous studies have suggested the ULJ–LLJ coupling via the secondary circulation as a key driver of the

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Kamal Puri and Noel E. Davidson

OCTOBER 1992 PURl AND DAVIDSON 2329The Use of Infrared Satellite Cloud Imagery Data as Proxy Data for Moisture and Diabatic Heating in Data Assimilation KAMAL PURI AND NOEL E. DAVIDSONBureau of Meteorology Research Centre, Melbourne, Australia(Manuscript received 10 July 1991, in final form 2 January 1992)ABSTRACT Geostationary and polar-orbiting satellites can provide useful proxy sources

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Matthew Newman and Prashant D. Sardeshmukh

corrected) version of the medium-range forecast model used operationally at the National Centers for Environmental Prediction in 1998 ( Newman et al. 2003 ). Many previous studies have considered either tropical or stratospheric influences on extratropical tropospheric variability, but generally not both. For example, the state vector considered by WNS01 (including weekly extratropical tropospheric streamfunction and tropical diabatic heating anomalies) did not allow an evaluation of the relative

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