Gases typically measured in parts per million (ppm), parts per billion (ppb) or parts per trillion (ppt) by volume are presented separately to facilitate comparison of numbers.
| Date Of Record Release | 2011-05-17 21:20:39 |
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| Description | Gases typically measured in parts per million (ppm), parts per billion (ppb) or parts per trillion (ppt) by volume are presented separately to facilitate comparison of numbers. |
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| Source | University of North Texas |
| Keyword | Atmospheric Composition, Climate Variability and Change |
| Selector | Selection Committee |
| Date Of Record Creation | 2011-05-17 20:45:07 |
| Education Level | |
| Date Last Modified | 2011-05-17 21:20:39 |
| Creator | Blasing, T.J. |
| Language | English |