| Acronym | Meaning |
 | EXCEL | Experimental Chloride Extraction Line |
| HST | Hubble Space Telescope |
| GCP | Global Change Program |
| EFC | Experimental Forecast Center |
| TBO | Tropospheric Biennial Oscillation |
| ECAO | Environmental Criteria And Assessment Office |
| SLU | Saint Louis University |
| ESL | Earth Sciences Laboratories |
| PPTV | Parts Per Trillion (by Volume) |
| TCZ | Tropical Convergence Zone |
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