PPT-Radiative-Convective Model

Overview of Model Convection The convection scheme of Emanuel and Živkovic Rothman 1999 uses a buoyancy sorting algorithm and represents an entire spectrum of convective clouds from shallow nonprecipitating cumulus to deep precipitating cumulonimbus Precipitation reevaporates and drives an unsaturated downdraft that imports enthalpy and moisture into the subcloud layer Reevaporation of cloud water resulting from entrainment of dry air drives penetrative downdrafts within the clouds The cloud base mass flux is continuously relaxed so as to produce near neutrality of a parcel lifted dry adiabatically and then moist adiabatically to the first level above its lifted condensation level This maintains a form of boundary layer . Hannah C. Barnes. Robert A. Houze, Jr.. University of Washington. Presentation by H. Barnes at Department of Meteorology, . The Pennsylvania . State University, State . Callege. , PA, August 15, 2014. tropical cyclones. Robert Fovell and . Yizhe. Peggy Bu. University of California, Los Angeles. rfovell@ucla.edu. 1. Thanks to. : . Greg . Thompson, NCAR/. DTC; Ligia . Bernardet. and Mrinal . Biswas. Crystal K Williams. Department of Geography-Geology. Illinois State University. Outline. Introduction/Background. Mesoscale Convective Systems. Squall Lines. Precipitation. Conclusions. Introduction. Brian Guyer & Deirdre Kann, National Weather Service, Albuquerque, NM. Project Summary. OBJECTIVE: . Test the growing suite of convective initiation products to determine their potential to improve forecasts and detection of hazardous convective events during the North American monsoon season.. SPECIFICS. OF STUDY. FINDINGS. Kohler,. 193. 6 (“The nucleus in and the growth of hygroscopic droplets”). Evaporate. 2kg of hoar-frost and . determined . Cl. content. ; used optics to . measure droplet size. . E. CHAM5-HAM. B. Croft. 1. , J.R. . . Pierce. 1. , R.V. Martin. 1,2. , C. Hoose. 3. , and U. Lohmann. 4. 1. Dalhouse University, Canada. 2. Harvard-Smithsonian Centre for Astrophysics, USA. 3. Karlsruhe Institute of Technology, Germany. Zack . Pecenak. Evan Greer. Changfu. Li. Climate Change - . Implications. Problem. Ongoing . climate . change. Solution:. Climate engineering?. Solar Radiation Management. Increasing the albedo of snow or clouds is a form of SRM. the . Radiative Effects . of . Black Carbon Internal Mixing. Charles Li. Group Meeting Presentation. October 1, 2014. Group Meeting 10/1/14. 1. Black Carbon (BC) Direct Radiative Forcing:. +0.71 W m. radiative. forcing of black carbon aerosol: constraints from pole-to-pole (HIPPO) observations across the Pacific. Qiaoqiao. Wang, Daniel J. Jacob, J. Ryan . Spackman. , Anne E. . Perring. , Joshua P. Schwarz, . Hitachi-. HiTec. Electronic Excitation Model. A. ~. X. ~. g. Excitation. (. Absorption. ). Radiationless. decay. (vibrational relaxation). g. Fluorescence. . (Fast . radiative. decay). Internal conversion. Feedbacks. . “Our understanding of the climate system is complicated by . feedbacks. that either . amplify. or . damp. perturbations…”. Feedbacks. . Describe the inter-related growth or decay of the components of a system.. Ref Vel. stratiform. Conv(all) rad_ref. Cloud analysis followed by 3dvar. Conv(uv spd) rw. Only 3dvar analysis. Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged and. Christopher . Melhauser. and . Fuqing. Zhang. The Pennsylvania State University. Department of Meteorology. Group Meeting – April 11, 2013. Focus. How does the diurnal radiation cycle impact the . role of precipitation-driven cold pools in deep convective cloud development over . the warm tropical . Ocean.. Approach. Track cold . pools and clouds developed near their boundaries using high-resolution regional model simulation.