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© Crown copyright Met Office A New Radiative Time- stepping Scheme A short description of the time-stepping scheme test Peter Hill, 19 Feb 2008
© Crown copyright Met Office Motivation Transmissivity = Regions with low transmissivity Absorption predominantly due to a strong gaseous absorber Absorption by clouds, aerosols and weak absorbers has little effect. Regions with high transmissivity Absorption predominantly due to clouds Gaseous absorbers are all weak. Treatment of main gaseous absorber is computationally more expensive. Clouds change on much shorter time-scales than the concentration of gases.
© Crown copyright Met Office Idea Replace existing spectral file with two new files A slow file for treating strong gaseous absorption, called less frequently. A fast file for treating clouds and minor gases, called more frequently.
© Crown copyright Met Office NAE Diagnostics SW Heating Rates,1 August 09.00 In experiment, fast is called every 3 time-steps, while slow is called every 18, the operational calls radiation every 12 time- steps.
© Crown copyright Met Office NAE Diagnostics LW Heating Rates,1 August 09.00
© Crown copyright Met Office Questions and answers
© Crown copyright Met Office Radiation Parametrisation Current development work with the UM James Manners, visit to Reading University on 19 th February.
© Crown copyright Met Office Radiation developments Latest work on the radiation code in the Unified Model James Manners, Reading collaboration meeting.
© Crown copyright Met Office Radiation scheme for Earth’s atmosphere …and what might not work for exoplanets James Manners 6/12/11.
1 00/XXXX © Crown copyright Update on the Met Office forecast model. Damian Wilson, Met Office.
Links Between Clear-sky Radiation, Water Vapour and the Hydrological Cycle Richard P. Allan 1, Viju O. John 2 1 Environmental Systems Science Centre, University.
VII. Climate Change Blackbody model Windows and saturation Feedbacks Aerosols.
Page 1 Developments in regional DA Oct 2007 © Crown copyright 2007 Mark Naylor, Bruce Macpherson, Richard Renshaw, Gareth Dow Data Assimilation and Ensembles,
© Crown copyright Met Office Met Office Unified Model I/O Server Paul Selwood.
Page 1© Crown copyright 2004 SRNWP Lead Centre Report on Data Assimilation 2005 for EWGLAM/SRNWP Annual Meeting October 2005, Ljubljana, Slovenia.
© Crown copyright 2006Page 1 CFMIP II sensitivity experiments Mark Webb (Met Office Hadley Centre) Johannes Quaas (MPI) Tomoo Ogura (NIES) With thanks.
Morrison/Gettelman/GhanAMWG January 2007 Two-moment Stratiform Cloud Microphysics & Cloud-aerosol Interactions in CAM H. Morrison, A. Gettelman (NCAR),
© Crown copyright Met Office Systematic Biases in Microphysics: observations and parametrization Ian Boutle, Steven Abel, Peter Hill, Cyril Morcrette QJ.
© Crown copyright Met Office AR5 Proposed runs for CMIP5 John Mitchell, after Karl Taylor, Ron Stouffer and others ENES, arch 2009.
© Crown copyright Met Office DIAMET forecast products.
Urban Heat Islands and Aerosols Affects on Cloud Formation and Precipitation By Travis Bramble Mentors: Prof. Fred Moshary and Dr. Gross Graduate Student:
1 MET 112 Global Climate Change MET 112 Global Climate Change - Lecture 3 The Earth’s Energy Balance Dr. Eugene Cordero San Jose State University Outline.
How is Energy Transferred?. Radiation animations of heat transfer Emission and transfer of energy by means of electromagnetic waves Method of heat transfer.
Radiation Heat Transfer EGR 4345 Heat Transfer. Blackbody Radiation Blackbody – a perfect emitter & absorber of radiation Emits radiation uniformly in.
AIM: How do differences in the specific heat of land and water control a locations weather and climate? Pre-Lab: Absorption & Radiation by Land & Water.
Energetic oxygen molecules 99.9% of gas lies below this layer Little mixing of air, has beneficial ozone N 2 (79%), O 2 (20%) horizontal and vertical.
Cloud droplet activation schemes. Motivation Met Office: UM new microphysics (4a scheme), linked to aerosols via parameterisations. Also WRF uses similar.
Shortwave Radiation Options in the WRF Model An oh-so fascinating study of the Dudhia, Goddard and RRTMG shortwave schemes.
1 00/XXXX © Crown copyright Apportioning climate change indicators between regional emitters Jason Lowe and Geoff Jenkins Hadley Centre for Climate Prediction.
© Crown copyright Met Office Cloudier Evaluating a new GCM prognostic cloud scheme using CRM data Cyril Morcrette, Reading University, 19 February 2008.
Korea Institute of Atmospheric Prediction Systems (KIAPS) ( 재 ) 한국형수치예보모델개발사업단 Comparison of Radiation Schemes Using a Single Colum Model Joonsuk Lee Jung-Yoon.
© Crown copyright Met Office The Role of Research Aircraft in YOPP Chawn Harlow, YOPP Summit, WMO, Geneva 13 July 2015.
© University of Reading Richard Allan Department of Meteorology, University of Reading Thanks to: Jim Haywood and Malcolm.
© Crown copyright Met Office Towards understanding the mechanisms responsible for different cloud-climate responses in GCMs. Mark Webb, Adrian Lock (Met.
Introduction to Climate and Environmental Physics HS 2014 Lecture II Christoph Raible, Markus Leuenberger, Fortunat Joos and Thomas Stocker.
METO621 Lesson 18. Thermal Emission in the Atmosphere – Treatment of clouds Scattering by cloud particles is usually ignored in the longwave spectrum.
Earth’s Energy Budget Lesson Plan 2 – Day 2. Bell Work: We know that if the Sun kept inputting energy and it didn't go anywhere, then we would eventually.
9: Examining Relationships in Quantitative Research ESSENTIALS OF MARKETING RESEARCH Hair/Wolfinbarger/Ortinau/Bush.
Urban Modelling 1 03/2003 © Crown copyright Urban Scale NWP with the Met Office's Unified Model Peter Clark Mesoscale Modelling Group Met Office Joint.
© Crown copyright Met Office Uncertainties in the Development of Climate Scenarios Climate Data Analysis for Crop Modelling workshop Kasetsart University,
Page 1© Crown copyright 2007 Initial tendencies of cloud regimes in the Met Office Unified Model Keith Williams and Malcolm Brooks Met Office, Hadley Centre.
MET 60: Chapter: 4 (W&H) and 2 (Stull) Radiative Transfer Dr. Craig Clements San José State University.
To fluxes & heating rates: Want to do things like: Calculate IR forcing due to Greenhouse Gases Changes in IR forcing due to changes in gas constituents.
© Crown copyright Met Office Turbulent dispersion: Key insights of G.I.Taylor and L.F.Richardson and developments stemming from them Dave Thomson, 17 th.
Chapter 4 Atmosphere and Surface Energy Balances Robert W. Christopherson Charlie Thomsen.
© Crown copyright Met Office Initial assessment of ARIES continuum measurements Stuart Newman Imperial College, 16 December 2008.
COMPARISON OF RITTER- GELEYN RADIATON CODE TO LBL MODEL RTX PRELIMINARY RESULTS Alessio Bozzo – ADGB Phys. dep. Univ. of Bologna ARPA-SIM 7th COSMO General.
Outline Further Reading: Chapter 05 of the text book - continental vs. marine regimes - temperature structure of the atmosphere - seasonal variations Natural.
1 MET 112 Global Climate Change MET 112 Global Climate Change - Lecture 2 The Earth’s Energy Balance Dr. Eugene Cordero San Jose State University Outline.
Strength versus Concentration H + A - H + A - HA A - H + A - H + A – H + A - H + A - H + A - HA H + A - H + A - H + A - H + HA HA HA HA HA H + A - HA.
Radiative Properties of Clouds ENVI3410 : Lecture 9 Ken Carslaw Lecture 3 of a series of 5 on clouds and climate Properties and distribution of clouds.
© Crown copyright Met Office Uncertainties in the Development of Climate Scenarios PRECIS Workshop, MMD, KL, November 2012.
1 00/XXXX © Crown copyright Carol Roadnight, Peter Clark Met Office, JCMM Halliwell Representing convection in convective scale NWP models : An idealised.
Solar Water Heating. Main part of solar water heater is collector. Two types of collector 1.Flat plate collector 2.Concentrating/focusing collector.
Page 1© Crown copyright 2005 Met Office Verification -status Clive Wilson, Presented by Mike Bush at EWGLAM Meeting October 8- 11, 2007.
Lesson Plan 2 – Day 2 Earth’s Energy Budget. Bell Work: We know that if the Sun kept inputting energy and it didn't go anywhere, then we would eventually.
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