Comparison of Hadcm3, CSIRO Mk3 and GFDL CM2. 1 in Prediction The
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Climate Models and Their Evaluation
8 Climate Models and Their Evaluation Coordinating Lead Authors: David A. Randall (USA), Richard A. Wood (UK) Lead Authors: Sandrine Bony (France), Robert Colman (Australia), Thierry Fichefet (Belgium), John Fyfe (Canada), Vladimir Kattsov (Russian Federation), Andrew Pitman (Australia), Jagadish Shukla (USA), Jayaraman Srinivasan (India), Ronald J. Stouffer (USA), Akimasa Sumi (Japan), Karl E. Taylor (USA) Contributing Authors: K. AchutaRao (USA), R. Allan (UK), A. Berger (Belgium), H. Blatter (Switzerland), C. Bonfi ls (USA, France), A. Boone (France, USA), C. Bretherton (USA), A. Broccoli (USA), V. Brovkin (Germany, Russian Federation), W. Cai (Australia), M. Claussen (Germany), P. Dirmeyer (USA), C. Doutriaux (USA, France), H. Drange (Norway), J.-L. Dufresne (France), S. Emori (Japan), P. Forster (UK), A. Frei (USA), A. Ganopolski (Germany), P. Gent (USA), P. Gleckler (USA), H. Goosse (Belgium), R. Graham (UK), J.M. Gregory (UK), R. Gudgel (USA), A. Hall (USA), S. Hallegatte (USA, France), H. Hasumi (Japan), A. Henderson-Sellers (Switzerland), H. Hendon (Australia), K. Hodges (UK), M. Holland (USA), A.A.M. Holtslag (Netherlands), E. Hunke (USA), P. Huybrechts (Belgium), W. Ingram (UK), F. Joos (Switzerland), B. Kirtman (USA), S. Klein (USA), R. Koster (USA), P. Kushner (Canada), J. Lanzante (USA), M. Latif (Germany), N.-C. Lau (USA), M. Meinshausen (Germany), A. Monahan (Canada), J.M. Murphy (UK), T. Osborn (UK), T. Pavlova (Russian Federationi), V. Petoukhov (Germany), T. Phillips (USA), S. Power (Australia), S. Rahmstorf (Germany), S.C.B. Raper (UK), H. Renssen (Netherlands), D. Rind (USA), M. Roberts (UK), A. Rosati (USA), C. Schär (Switzerland), A. Schmittner (USA, Germany), J. Scinocca (Canada), D. Seidov (USA), A.G. -
Results from the Implementation of the Elastic Viscous Plastic Sea Ice Rheology in Hadcm3 W
Results from the implementation of the Elastic Viscous Plastic sea ice rheology in HadCM3 W. M. Connolley, A. B. Keen, A. J. Mclaren To cite this version: W. M. Connolley, A. B. Keen, A. J. Mclaren. Results from the implementation of the Elastic Viscous Plastic sea ice rheology in HadCM3. Ocean Science, European Geosciences Union, 2006, 2 (2), pp.201- 211. hal-00298295 HAL Id: hal-00298295 https://hal.archives-ouvertes.fr/hal-00298295 Submitted on 23 Oct 2006 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ocean Sci., 2, 201–211, 2006 www.ocean-sci.net/2/201/2006/ Ocean Science © Author(s) 2006. This work is licensed under a Creative Commons License. Results from the implementation of the Elastic Viscous Plastic sea ice rheology in HadCM3 W. M. Connolley1, A. B. Keen2, and A. J. McLaren2 1British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK 2Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK Received: 13 June 2006 – Published in Ocean Sci. Discuss.: 10 July 2006 Revised: 21 September 2006 – Accepted: 16 October 2006 – Published: 23 October 2006 Abstract. We present results of an implementation of the a full dynamical model incorporating wind stresses and in- Elastic Viscous Plastic (EVP) sea ice dynamics scheme into ternal ice stresses leads to errors in the detailed representa- the Hadley Centre coupled ocean-atmosphere climate model tion of sea ice and limits our confidence in its future predic- HadCM3. -
Coordination of Atmospheric Dispersion Activities for the Real-Time Decision Support System RODOS
RODOS R-2-1997 RIS0-R-93O (EN) DK9700116 Coordination of Atmospheric Dispersion Activities for the Real-Time Decision Support System RODOS DECISION SUPPORT FOR NUCLEAR EMERGENCIES RODOS R-2-1997 RIS0-R-93O (EN) Coordination of Atmospheric Dispersion Activities for the Real-Time Decision Support System RODOS Torben Mikkelsen RIS0 National Laboratory Denmark July 1997 Secretariat of the RODOS Project: Forschungszentrum Karlsruhe Institut fur Neutronenphysik und Reaktortechnik P.O. Box 3640, 76021 Karlsruhe, Germany Phone: +49 7247 82 5507, Fax: +49 7247 82 5508 EMail: [email protected], Internet: http://rodos.fzk.de This work has been performed with the support of the European Commission Radiation Protection Research Action (DGXII-F-6) contract FI3P-CT92-0044 This report has been published as Report RIS0-R-93O (EN) (ISSN 0106-2840) (ISBN 87-550-2230-8) in May 1997 by RIS0 National Laboratory P.O. Box 49 DK-4000 Roskilde, Denmark Management Summary 1.1 Global Objectives: This projects task has been to coordinate activities among the RODOS Atmospheric Dispersion sub-group A participants (1) - (8), with the overall objective of developing and integrating an atmospheric transport and dispersion module for the joint European Real-time On- line DecisiOn Support system RODOS headed by FZK (formerly KfK), Germany. The projects final goal is the establishment of a fully operational, system-integrated atmospheric transport module for the RODOS system by year 2000, capable of consistent now- and forecasting of radioactive airborne spread over all types of terrain and on all scales of interest, including in particular complex terrain and the different scales of operation, such as the local, the national and the European scale. -
Assimila Blank
NERC NERC Strategy for Earth System Modelling: Technical Support Audit Report Version 1.1 December 2009 Contact Details Dr Zofia Stott Assimila Ltd 1 Earley Gate The University of Reading Reading, RG6 6AT Tel: +44 (0)118 966 0554 Mobile: +44 (0)7932 565822 email: [email protected] NERC STRATEGY FOR ESM – AUDIT REPORT VERSION1.1, DECEMBER 2009 Contents 1. BACKGROUND ....................................................................................................................... 4 1.1 Introduction .............................................................................................................. 4 1.2 Context .................................................................................................................... 4 1.3 Scope of the ESM audit ............................................................................................ 4 1.4 Methodology ............................................................................................................ 5 2. Scene setting ........................................................................................................................... 7 2.1 NERC Strategy......................................................................................................... 7 2.2 Definition of Earth system modelling ........................................................................ 8 2.3 Broad categories of activities supported by NERC ................................................. 10 2.4 Structure of the report ........................................................................................... -
Dispersion Modeling of Air Pollutants in the Atmosphere: a Review
Cent. Eur. J. Geosci. • 6(3) • 2014 • 257-278 DOI: 10.2478/s13533-012-0188-6 Central European Journal of Geosciences Dispersion modeling of air pollutants in the atmosphere: a review Research Article Ádám Leelossy˝ 1, Ferenc Molnár Jr.2, Ferenc Izsák3, Ágnes Havasi3, István Lagzi4, Róbert Mészáros1∗ 1 Department of Meteorology, Eötvös Loránd University, Budapest, Hungary 2 Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York, USA 3 Department of Applied Analysis and Computational Mathematics, Eötvös Loránd University, Budapest, Hungary 4 Department of Physics, Budapest University of Technology and Economics, Budapest, Hungary Received 22 October 2013; accepted 15 May 2014 Abstract: Modeling of dispersion of air pollutants in the atmosphere is one of the most important and challenging scientific problems. There are several natural and anthropogenic events where passive or chemically active compounds are emitted into the atmosphere. The effect of these chemical species can have serious impacts on our environment and human health. Modeling the dispersion of air pollutants can predict this effect. Therefore, development of various model strategies is a key element for the governmental and scientific communities. We provide here a brief review on the mathematical modeling of the dispersion of air pollutants in the atmosphere. We discuss the advantages and drawbacks of several model tools and strategies, namely Gaussian, Lagrangian, Eulerian and CFD models. We especially focus on several recent advances in this multidisciplinary research field, like parallel computing using graphical processing units, or adaptive mesh refinement. Keywords: air pollution modeling • Lagrangian model • Eulerian model • CFD; accidental release • parallel computing © Versita sp. -
Climate Research 60:103
Vol. 60: 103–117, 2014 CLIMATE RESEARCH Published online June 17 doi: 10.3354/cr01222 Clim Res Ranking of global climate models for India using multicriterion analysis K. Srinivasa Raju1, D. Nagesh Kumar2,3,* 1Department of Civil Engineering, Birla Institute of Technology and Science-Pilani, Hyderabad campus, India 2Center for Earth Sciences, Indian Institute of Science, 560012 Bangalore, India 3Present address: Department of Civil Engineering, Indian Institute of Science, 560012 Bangalore, India ABSTRACT: Eleven GCMs (BCCR-BCCM2.0, INGV-ECHAM4, GFDL2.0, GFDL2.1, GISS, IPSL- CM4, MIROC3, MRI-CGCM2, NCAR-PCMI, UKMO-HADCM3 and UKMO-HADGEM1) were evaluated for India (covering 73 grid points of 2.5° × 2.5°) for the climate variable ‘precipitation rate’ using 5 performance indicators. Performance indicators used were the correlation coefficient, normalised root mean square error, absolute normalised mean bias error, average absolute rela- tive error and skill score. We used a nested bias correction methodology to remove the systematic biases in GCM simulations. The Entropy method was employed to obtain weights of these 5 indi- cators. Ranks of the 11 GCMs were obtained through a multicriterion decision-making outranking method, PROMETHEE-2 (Preference Ranking Organisation Method of Enrichment Evaluation). An equal weight scenario (assigning 0.2 weight for each indicator) was also used to rank the GCMs. An effort was also made to rank GCMs for 4 river basins (Godavari, Krishna, Mahanadi and Cauvery) in peninsular India. The upper Malaprabha catchment in Karnataka, India, was chosen to demonstrate the Entropy and PROMETHEE-2 methods. The Spearman rank correlation coefficient was employed to assess the association between the ranking patterns. -
Future Predictions of Rainfall and Temperature Using GCM and ANN for Arid Regions: a Case Study for the Qassim Region, Saudi Arabia
water Article Future Predictions of Rainfall and Temperature Using GCM and ANN for Arid Regions: A Case Study for the Qassim Region, Saudi Arabia Khalid Alotaibi 1,*, Abdul Razzaq Ghumman 1 , Husnain Haider 1, Yousry Mahmoud Ghazaw 1,2 and Md. Shafiquzzaman 1 1 Department of Civil Engineering, College of Engineering, Qassim University, Buraydah 51431, Al Qassim, Saudi Arabia; [email protected] (A.R.G.); [email protected] (H.H.); [email protected] (Y.M.G.); shafi[email protected] (M.S.) 2 Department of Irrigation and Hydraulics, College of Engineering, Alexandria University, Alexandria 21544, Egypt * Correspondence: [email protected]; Tel.: +966-531-105-001 Received: 26 July 2018; Accepted: 13 September 2018; Published: 15 September 2018 Abstract: Future predictions of rainfall patterns in water-scarce regions are highly important for effective water resource management. Global circulation models (GCMs) are commonly used to make such predictions, but these models are highly complex and expensive. Furthermore, their results are associated with uncertainties and variations for different GCMs for various greenhouse gas emission scenarios. Data-driven models including artificial neural networks (ANNs) and adaptive neuro fuzzy inference systems (ANFISs) can be used to predict long-term future changes in rainfall and temperature, which is a challenging task and has limitations including the impact of greenhouse gas emission scenarios. Therefore, in this research, results from various GCMs and data-driven models were investigated to study the changes in temperature and rainfall of the Qassim region in Saudi Arabia. Thirty years of monthly climatic data were used for trend analysis using Mann–Kendall test and simulating the changes in temperature and rainfall using three GCMs (namely, HADCM3, INCM3, and MPEH5) for the A1B, A2, and B1 emissions scenarios as well as two data-driven models (ANN: feed-forward-multilayer, perceptron and ANFIS) without the impact of any emissions scenario. -
The New Hadley Centre Climate Model (Hadgem1): Evaluation of Coupled Simulations
1APRIL 2006 J OHNS ET AL. 1327 The New Hadley Centre Climate Model (HadGEM1): Evaluation of Coupled Simulations T. C. JOHNS,* C. F. DURMAN,* H. T. BANKS,* M. J. ROBERTS,* A. J. MCLAREN,* J. K. RIDLEY,* ϩ C. A. SENIOR,* K. D. WILLIAMS,* A. JONES,* G. J. RICKARD, S. CUSACK,* W. J. INGRAM,# M. CRUCIFIX,* D. M. H. SEXTON,* M. M. JOSHI,* B.-W. DONG,* H. SPENCER,@ R. S. R. HILL,* J. M. GREGORY,& A. B. KEEN,* A. K. PARDAENS,* J. A. LOWE,* A. BODAS-SALCEDO,* S. STARK,* AND Y. SEARL* *Met Office, Exeter, United Kingdom ϩNIWA, Wellington, New Zealand #Met Office, Exeter, and Department of Physics, University of Oxford, Oxford, United Kingdom @CGAM, University of Reading, Reading, United Kingdom &Met Office, Exeter, and CGAM, University of Reading, Reading, United Kingdom (Manuscript received 30 May 2005, in final form 9 December 2005) ABSTRACT A new coupled general circulation climate model developed at the Met Office’s Hadley Centre is pre- sented, and aspects of its performance in climate simulations run for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) documented with reference to previous models. The Hadley Centre Global Environmental Model version 1 (HadGEM1) is built around a new atmospheric dynamical core; uses higher resolution than the previous Hadley Centre model, HadCM3; and contains several improvements in its formulation including interactive atmospheric aerosols (sulphate, black carbon, biomass burning, and sea salt) plus their direct and indirect effects. The ocean component also has higher resolution and incorporates a sea ice component more advanced than HadCM3 in terms of both dynamics and thermodynamics. -
Influence of Ozone Recovery and Greenhouse Gas Increases on Southern Hemisphere Circulation Alexey Y
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115, D22117, doi:10.1029/2010JD014423, 2010 Influence of ozone recovery and greenhouse gas increases on Southern Hemisphere circulation Alexey Y. Karpechko,1,2 Nathan P. Gillett,3 Lesley J. Gray,4 and Mauro Dall’Amico5,6 Received 27 April 2010; revised 6 September 2010; accepted 13 September 2010; published 24 November 2010. [1] Stratospheric ozone depletion has significantly influenced the tropospheric circulation and climate of the Southern Hemisphere (SH) over recent decades, the largest trends being detected in summer. These circulation changes include acceleration of the extratropical tropospheric westerly jet on its poleward side and lowered Antarctic sea level pressure. It is therefore expected that ozone changes will continue to influence climate during the 21st century when ozone recovery is expected. Here we use two contrasting future ozone projections from two chemistry‐climate models (CCMs) to force 21st century simulations of the HadGEM1 coupled atmosphere‐ocean model, along with A1B greenhouse gas (GHG) concentrations, and study the simulated response in the SH circulation. According to several studies, HadGEM1 simulates present tropospheric climate better than the majority of other available models. When forced by the larger ozone recovery trends, HadGEM1 simulates significant deceleration of the tropospheric jet on its poleward side in the upper troposphere in summer, but the trends in the lower troposphere are not significant. In the simulations with the smaller ozone recovery trends the zonal mean zonal wind trends are not significant throughout the troposphere. The response of the SH circulation to GHG concentration increases in HadGEM1 includes an increase in poleward eddy heat flux in the stratosphere and positive sea level pressure trends in southeastern Pacific. -
The Dynamic Response of the Global Atmosphere-Vegetation Coupled System
THE UNIVERSITY OF READING Department of Meteorology The Dynamic Response of the Global Atmosphere-Vegetation coupled system John K. Hughes A thesis submitted for the degree of Doctor of Philosophy October 2003 ’Declaration I confirm that this is my own work and the use of all material from other sources has been properly and fully acknowledged’ John Hughes The Dynamic Response of the Atmosphere-Vegetation coupled system Abstract Concern about future changes in the carbon cycle have highlighted the importance of a dy- namic representation of the carbon cycle in models, yet this has not been fully assessed. In this thesis, we investigate the dynamic carbon cycle model included within the Hadley Centre’s model. In order to understand the behaviour of the vegetation model a simplified model, describing the behaviour of a single plant functional type is derived. The ability of the simplified model to simulate vegetation dynamics is validated against the behaviour of the full complexity model. The dynamical properties of the simplified model are then investigated. To further investigate the dynamic response of vegetation, a 300 year climate model simulation of terrestrial vegetation re-growth from global desert has been performed. Vegetation is shown to introduce large time lags in land surface properties. This large memory in the terrestrial carbon cycle is an important result for GCM simulations. The large timescale also affects the response of existing vegetation to climatic forcings. The behaviour of the land surface in terms of source-sink transitions of atmospheric CO2 is discussed. It is found that the transitions between source and sink of CO2 are dependant on the vegetation timescales. -
Technical Manual for PRECIS
Technical Manual for PRECIS The Met Office Hadley Centre regional climate modelling system Version 2.0.0 www.metoffice.gov.uk/precis Simon Wilson, David Hassell, David Hein, Changgui Wang, Simon Tucker Richard Jones and Ruth Taylor November 16, 2015 Contents 1 Introduction 11 1.1 Background .............................. 11 1.2 Objectivesandstructureofthemanual . 12 2 Hardware, operating system and software environment 13 2.1 Recommended Hardware Configurations . 13 2.2 Multi-processorsystems . 14 2.3 InstallationofLinux ......................... 14 2.4 Compilers ............................... 16 2.5 System setup before installing PRECIS . 17 3 PRECIS software and installation 19 3.1 Introduction.............................. 19 3.2 Disklayout .............................. 20 3.3 Main steps in installation process . 21 3.4 Installation of PRECIS software and data . 22 3.5 InstallationofMetOfficedata . 26 3.5.1 Boundary data supplied on hard drive . 26 3.6 Installation verification . 28 3.7 InstallationofCDAT ......................... 29 4 Experimental design and setup 30 4.1 Experimentaldesign ......................... 30 4.1.1 Regional climate model . 30 2 4.1.2 Choice of driving model and forcing scenario . 30 4.1.3 CMIP5 Driving GCMs and Representative Concentration Pathways ........................... 37 4.1.4 Simulationlength. 40 4.1.5 Initial condition ensembles . 41 4.1.6 Choice of land surface scheme . 42 4.1.7 Outputdata.......................... 42 4.1.8 Spinup............................. 42 4.1.9 Choice of region . 43 4.1.10 Land-seamask ........................ 43 4.1.11 Altitude ............................ 45 4.1.12 Altitude of inland waters . 45 4.1.13 Soil and land cover . 45 4.1.14 RCM calendar and clock . 46 4.1.15 RCM Resolution . 46 4.1.16 Outputformat ....................... -
A Description of the FAMOUS (Version XDBUA) Climate Model and Control Run
Geosci. Model Dev., 1, 53–68, 2008 www.geosci-model-dev.net/1/53/2008/ Geoscientific © Author(s) 2008. This work is distributed under Model Development the Creative Commons Attribution 3.0 License. A description of the FAMOUS (version XDBUA) climate model and control run R. S. Smith1, J. M. Gregory1,2, and A. Osprey1 1NCAS-Climate, Walker Institute, Reading, UK 2Met Office Hadley Centre, Exeter, UK Received: 2 July 2008 – Published in Geosci. Model Dev. Discuss.: 28 July 2008 Revised: 2 December 2008 – Accepted: 2 December 2008 – Published: 12 December 2008 Abstract. FAMOUS is an ocean-atmosphere general circu- (AOGCM) means that they are usually impractical for studies lation model of low resolution, capable of simulating approx- where millennial timescales are addressed or large ensembles imately 120 years of model climate per wallclock day using are required. Whilst simplified models which are capable of current high performance computing facilities. It uses most quickly simulating many thousands of years of climate are of the same code as HadCM3, a widely used climate model available (e.g. Earth System Models of Intermediate Com- of higher resolution and computational cost, and has been plexity (EMIC) Claussen et al., 2002), they often have to tuned to reproduce the same climate reasonably well. FA- omit important processes. To reduce the computational ex- MOUS is useful for climate simulations where the compu- pense of an AOGCM without neglecting any of the processes tational cost makes the application of HadCM3 unfeasible, it describes, one may decrease the spatial resolution and in- either because of the length of simulation or the size of the crease the timestep of the model.