2007 Group Meeting 2007 Group Meeting Global Climate and Air Global Climate and Air Pollution (GCAP) Pollution (GCAP) at at Harvard University Harvard University Nicky Lam and Joshua Fu Nicky Lam and Joshua Fu University of Tennessee University of Tennessee October 12, 2007 October 12, 2007
32
Embed
2007 Group Meeting Global Climate and Air Pollution (GCAP) at Harvard University Nicky Lam and Joshua Fu University of Tennessee October 12, 2007.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
2007 Group Meeting 2007 Group Meeting Global Climate and Air Global Climate and Air
Pollution (GCAP)Pollution (GCAP)
atat
Harvard UniversityHarvard University
Nicky Lam and Joshua FuNicky Lam and Joshua Fu
University of TennesseeUniversity of Tennessee
October 12, 2007October 12, 2007
GCAP UpdateGCAP UpdateUT TeamUT Team
1. Find best MM5 schemes for GISS data• Sensitivity analysis• Best scenario for whole domain• Best scenario for Northeastern States,
Southeastern States, Central States, & West States
2. Preliminary run using Barry Lynn suggested base on the Best MM5 schemes in Northeastern States and other schemes combinations
•Case 24 (Kain-Fritsch 2, Eta, Reisner 2, RRTM) has closer temperature compared to others
•Similar wind speed were found on all cases
•Similar wind direction were found on all cases
Noted: Noah LSM is not available due to lack of soil layers
Current Soil Layer Configuration
10 10 10 1017.3 30
200
17.329.8
60
29.8
51.4
10088.6
153
0
50
100
150
200
250
300
350
400
GoesChem Noah LSM PX LSM Current data
Type
Cu
mu
lati
ve H
eig
ht
(cm
)
Layer 6
Layer 5
Layer 4
Layer 3
Layer 2
Layer 1
May need to discuss with Loretta to reprocessing the output from GEOS-Chem
• Case 24 is used in all preliminary Case 24 is used in all preliminary simulation.simulation.
• This setting was suggested by Barry This setting was suggested by Barry Lynn claimed to be the best scenario Lynn claimed to be the best scenario for Northeastern Statesfor Northeastern States
MM5 Scheme Evaluation
MM5 SettingMM5 Setting
• LAMBERT CONFORMAL• NO COARSE DOMAIN EXPANSION • TRUE LATITUDE 1 (degree) => 33 degrees• TRUE LATITUDE 2 (degree) => 45 degrees
• Time increment between analysis times (s)=> 3 hrs data• Top pressure used in analysis, model lid (Pa) => 10000.00• No FDDA• Number of half-sigma layers => 34 layers• Simulation duration for each run => 6 days with 12 hrs spinoff• Simulation time step => 90 seconds