1. Introduction - Overview
PROBLEM: Inconsistent
climate model output over time
- Model changes in NMC's Global Data Assimilation System (GDAS)
- Apparent jumps in climate variables caused
- RESULT: Real climate changes difficult to reliably detect
SOLUTION: Use a frozen
analysis/forecast system
- Historical: 1958 - date (possibly back to 1946)
- Continue into future as Climate Data Assimilation System (CDAS)
- 40 years of Reanalysis over next 2-3 years
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