CCSM Tutorial CCSM Software Engineering Group ccsmucar edu

CCSM Tutorial CCSM Software Engineering Group ccsm@ucar. edu June 28 2002 www. ccsm. ucar. edu

Welcome • Logistics • Why are we here today? – Teach you how to run CCSM 2 – Introduce CSEG members to you – Build the CCSM community – Get feedback from you on future directions • What this workshop is not www. ccsm. ucar. edu

CCSM Software Engineering Group Tony Craig Lawrence Buja Brian Kauffman _____? _____ Nancy Norton Mariana Vertenstein Julie Schramm Erik Kluzek Wei Yu Dan Miner CSEG Manager QA Lead CPL Liaison ATM Liaison OCN Liaison LND Liaison ICE Liaison ESMF Liaison Testing Infrastructure www. ccsm. ucar. edu

CCSM Support Christine Shields Mark Stevens Sylvia Murphy Paleoclimate Atmosphere CCSM SN www. ccsm. ucar. edu

Review survey results • What do you expect to get out of the tutorial? • Have you ever used a climate model before? If so, what is your level of experience? • What model configurations and science experiments are you most interested in running? • On which platforms and where will you run the model? • Are there any suggestions that you would like to make about the content of the tutorial? www. ccsm. ucar. edu

What do you expect from the tutorial? • How to download, setup and run CCSM: • General understanding the structure of the model and basic configuration. • How to modify CCSM, • How to post process CGCM runs. www. ccsm. ucar. edu

2. Climate Modeling Experience? – Novice: 5 • I am in the beginning level. • my experience is close by zero! – Some Experience: 10 • Not high, MOM GFDL • I have experience with running GENESIS – Very Experienced: 7 • Yes. I have ever used and modified CSM 1. 2. • 10 -years experience running AGCMs, OGCMs, and coupled AO GCMs. • My level of experience with climate models is fairly advanced. www. ccsm. ucar. edu

3. configurations/science experiments – Standard Coupled runs 15 • • • Present-day and future climate changes. Interactions between climate and carbon cycle. TOGA, GOGA -alike coupled experiments decadal simulations of the CCSM Processes relevant to ENSO and the Asian monsoons. high resolutions tropical oceans(finer than 1 degree) to resolve ocean waves. • time of response forcings in the atmosphere. • calculating direct and indirect effects due to the aerosols www. ccsm. ucar. edu

3. configurations/science experiments – Standalone models 10 • • • Ocean-sea ice configurations. OGCM alone and AGCM alone experiments AGCM coupled to a MLO with heat flux adjustments. Land use/land cover change CAM/CLM 2 and CCSM 2. vegetation and low atmosphere interactions. CLM climatic biogenic hydrocarbon and CO emissions – Paleo: 5 • paleoclimate models and rapid climate change. • Palaeo version and carbon cycle simulations • changed continental configuration (aquaplanet). www. ccsm. ucar. edu

4. platforms • • • I will run the models on DEC, SGI, and IBM-SP. Swiss Scientific Computing Center, Manno, IBM at NCAR/ORNL, Origin at NCAR/LLNL. Linux (if possible) at ANL. IBM and SGI. Georgia Tech. Origin 2000, 2400, 3400, and IBM SP in Georgia Unix, SGI Origin 2000/3000, the last half of this year Unix platform, SGI Origin 3000. SGI. : University of Oslo, PNNL Compaq Alphaserver ES 40 with 4 processors. The University of Toronto CRAY (NEC) SX-6. IBM Regetta (Power 4) www. ccsm. ucar. edu

5. suggestions • Running separate parts of the model system • Guidelines on adding/changing code • Response simulations, necessary timeframes? • Review of climate modeling software, different approaches, parallelization, coding efficiency • software engineer questions toward to the computer and software can be answered. • please include info on how to run the model elsewhere. www. ccsm. ucar. edu

Tutorial schedule • • • 9: 00 9: 15 9: 30 10: 00 10: 30 10: 45 11: 30 12: 30 1: 30 2: 30 3: 00 Opening/Introduction of CSEG Overview of the CCSM system The Quick Start Guide The CCSM 2. 0 scripts Break Building CCSM 2. 0 Running CCSM 2. 0 Lunch Changing the CCSM: 4 examples: Data Processing: Open Discussion www. ccsm. ucar. edu