the community coordinated modeling center: a brief overview
DESCRIPTION
The Community Coordinated Modeling Center: A Brief Overview. Lika Guhathakurta. http://ccmc.gsfc.nasa.gov. NASA Goddard Space Flight Center. “ A US multi-agency partnership to enable, support, and perform the research and development for next generation space science and space weather models”. - PowerPoint PPT PresentationTRANSCRIPT
The Community Coordinated Modeling
Center:A Brief Overview
NASA Goddard Space Flight Center
Lika Guhathakurta
http://ccmc.gsfc.nasa.gov
“A US multi-agency partnership to enable, support, and perform the research and development for next generation space
science and space weather models”
CCMC
Facilitate Community Research
SupportModel
Transition to Operations
DoD and NOAA Space Weatherneeds
CCMC Goals
International Research Community
Goals:
- One stop shopping for modern space science models- Easy access to modern models for non-experts- Simple-to-use, unified interfaces- Advanced, tailored visualization tools- Continuous improvements through user feedback
CCMC Functions: Research Support
• Through www-accessible run results
• Through runs on request (>1000 now),
- magnetospheric models
- ionospheric models
- heliospheric models
- solar models
• No cost to (international) user
Service
A. Chulaki, L. Rastaetter, M. Goldfarb
Solar Models
• Potential Field Source Surface (Luhmann, UCB) - Global solar magnetic field structure
• MAS (Linker et al – SAIC) – Global solar magnetic field and plasma structure
P. MacNeice, L. Rastaetter
Density, flows
Solar/Heliospheric Models
WSA (Wang-Sheeley-Arge) – PFSS corona + ‘potential’ current sheet + empirical kinematic solar wind
Heliospheric Models
• ENLIL (Odstrcil – NOAA) – 3D MHD model of inner heliosphere ( 30rs – 10AU) .
• Exospheric Solar Wind Model (Lamy/Pierrard) – 1D kinetic model of solar wind solution along a coronal hole fieldline.
• Heliospheric Tomography (Jackson,Hick –
UCSD) – Constructs global mass and velocity distribution from a simple kinematic model and assimilation of radio
scintillation data.
Testing : Sun to Earth
PhotosphericSynopticmagnetograms
WSA – potential field + equatorial current sheet model (1-21.5rs)
ENLIL - 3D MHD Heliosphere (21.5rs – 1,2 or 10AU)
Running in realtime,
collab. With CISM
P. MacNeice, L. Rastaetter
Magnetospheric Element
CCMC_CCMC_031307_SH_1.isosurface.mp4
Magnetospheric Models
•BATSRUS (UMich) – 3D global MHD models of magnetosphere •Fok kinetic Ring Current and
Radiation Belt Models ( 2RE – 6RE) .
also executing in real time
Magnetospheric Models
LFM MHD modelCMIT 1.0CISM collaboration
OpenGGCM MHD modelJ. Raeder collaboration
science quality resolution
Ionospheric Models
•Electrodynamic (MHD ionospheric modules)•Empirical (Weimer statistical)•SAMI 2 meridional ionosheric (Huba, NRL)•CTIP global ionospheric (Fuller-Rowell et al, NOAA)
M. Kuznetsova, L. Rastaetter
NmF2
ne
Runs-On-Request System Usage (as of Aug 2006)
Executed runs:Solar & Heliosphere : 128Global magnetosphere: 607Inner magnetosphere: 97Ionosphere: 166
Total: 998 runsNow > 1300! 0
200
400
600
800
1000
2001 2002 2003 2004 2005 2006
Total runs projected for the remainder of 2006
Solar and Heliosphere
Ionosphere/Thermosphere
Inner Magnetosphere
Global Magnetosphere
cumulative run execution
Decision makers and operational agencies need model evaluations
- Science-based validation: Compare model output to measurements for select events, detailed analysis
- Metrics studies: Repeatable comparison between model output and measurements, “one number”
Need to be blind studies, performed by independent agent
CCMC Functions: Transition to Ops
V&V: Software Predicting MeV Electron Intensity
Comparison of Actual vs. Predicted Fluxes
1
10
100
1000
10000
100000
7/17/20057/24/20057/31/20058/7/2005
8/14/20058/21/20058/28/20059/4/2005
9/11/20059/18/20059/25/200510/2/2005
Date
Electron Intensity (>2MeV)
GOES data
Flux Prediction
Persistence Model
Recurrence Model
Average Flux
• Quiet vs stormy period
Evaluated model: Software predicting MeV electron intensity at the geostationary orbit Developed at: APL/UPOS Input: real-time ACE data Output: polar cap potential Considered for operations at AFWA
Reference Model
Skill Score
Whole interval
Quiet Stormy
1-day persistence
-0.3544 -0.3864 0.2355
Mean 0.2041 0.2294 0.2047
27-day recurrence
0.2935 0.2468 0.3629
V&V: ENLIL Model Preliminary Evaluation
Velocity Velocity DensityDensity
TemperatureTemperature Magnetic FieldMagnetic Field
Plots of ENLIL output (blue line) vs real-time ACE data (red)
Skill scores for ENLIL as a function of persistence interval
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
0 50 100 150 200
Interval (hours)
Skill score
• Support the generation of advanced space science models• Collaborate with related activities (CISM, CSEM…)• Expand strong service to (international) research community
– Execute runs-on-request– Provide ready access to model output with enhanced tools– Includes mission support, e.g., STEREO, THEMIS– Includes campaign support, e.g., IHY– Interested in international partnering
• Expand model base, e.g., – UCB ANMHD model– DeVore ARMS – DeForest Fluxon model– Nonlinear force-free model
• Serve models developed under LWS and NASA/NSF partnership• Driven by user feedback
Future Activities: Research Support