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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 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.
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.
© Crown copyright 2006Page 1 CFMIP II sensitivity experiments Mark Webb (Met Office Hadley Centre) Johannes Quaas (MPI) Tomoo Ogura (NIES) With thanks.
© Crown copyright Met Office Cloudier Evaluating a new GCM prognostic cloud scheme using CRM data Cyril Morcrette, Reading University, 19 February 2008.
Robin Hogan Anthony Illingworth, Sarah Kew, Jean- Jacques Morcrette, Itumeleng Kgololo, Joe Daron, Anna Townsend Quantifying sub-grid cloud structure and.
1 Chapter 14 Acids and Bases 14.6 The pH Scale Copyright © 2008 by Pearson Education, Inc. Publishing as Benjamin Cummings.
© Crown copyright Met Office Regional climate model formulation PRECIS Workshop, Reading University, 23 rd – 27 th April 2012.
1 PV Generation in the Boundary Layer Robert Plant 18th February 2003 (With thanks to S. Belcher)
Cloud droplet activation schemes. Motivation Met Office: UM new microphysics (4a scheme), linked to aerosols via parameterisations. Also WRF uses similar.
Met Office Hadley Centre, FitzRoy Road, Exeter, Devon, EX1 3PB United Kingdom Tel: +44 (0) Fax: +44 (0)
© Crown copyright Met Office Investigating a perturbed physics scheme in a wave ensemble system Ray Bell (Line manager: Francois-Bocquet) Ocean Iced Tea.
CHAM USER MEETING 2006 PHOENICS Based Arc Models as a Test Tool for New Design Ideas in Switching Device Department of Electrical Engineering and Electronics,
Describe the greenhouse effect. Why is the equator hotter? Why do we have seasons? By Meghan Burton Period 3 June 12, 2006.
The µm Band: A More Appropriate Window Band for the GOES-R ABI Than 11.2 µm? Daniel T. Lindsey, STAR/CoRP/RAMMB Wayne M. MacKenzie, Jr., Earth Resources.
The Amazing Spectral Line Begin. Table of Contents A light review Introduction to spectral lines What spectral lines can tell us.
1 Temperature and Heat Temperature is the measurement of the avg. KE of the molecules in a material. Heat is the transfer of KE from one material to.
The Unit Rate as the Scale Factor. What type of scale drawing is the sticker? What is the importance of proportionality for Rubin? How could we go about.
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.
Green House Effect and Global Warming. Do you believe that the planet is warming? 1.Yes 2.No.
Predictable Chaotic Exhibits memory Equilibrium Towards non-equilibrium Acknowledgements LD is supported by NERC CASE award NER/S/A/2004/ Conclusions.
Energy the ability to do work or to change something used whenever the location, makeup or look of something changes.
© Crown copyright Met Office Met Office Experiences with Convection Permitting Models Humphrey Lean Reading, UK Nowcasting Workshop,
1) Read 2) Plan 3) Solve 4) Check Camels live in many places around the world. There are two kinds of camels. The Bactrian camel has two humps, while.
1 00/XXXX © Crown copyright Apportioning climate change indicators between regional emitters Jason Lowe and Geoff Jenkins Hadley Centre for Climate Prediction.
Scale Factor MA.7.4.2By:. What is Scale Factor? Scale factor is the ratio between the lengths of corresponding sides of two similar figures. Scale factor.
Page 1© Crown copyright Some Strengths and Weaknesses of ECMWF Forecasts for the UK Tim Hewson 15 th June 2006 Contributors include: Eleanor Crompton,
Challenges in Making Tomography Practical Yiyi Huang, Georgia Tech Nick Feamster, Georgia Tech Renata Teixeira, LIP6 Christophe Diot, Thomson.
Interaction of Light and Matter - Applications in Laser Surgery & Therapy Background Image:
Page 1© Crown copyright 2005 Use of EPS at the Met Office Ken Mylne and Tim Legg.
COMPUTER SYSTEMS An Integrated Approach to Architecture and Operating Systems Chapter 9 Memory Hierarchy ©Copyright 2008 Umakishore Ramachandran and William.
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