| タイトル | Time variation of urban mass loading measured by small filters compared to high-volume samplers |
| 著者（英） | Crumbly, K. H.; Harris, F. S., Jr. |
| 著者所属（英） | Old Dominion Univ.|NASA Langley Research Center |
| 発行日 | 1978-01-01 |
| 言語 | eng |
| 内容記述 | The paper shows how the use of an instrument with 12 small-diameter (47-mm) membrane filters (samples taken for 12 2-hr periods), in conjunction with wind direction measurements, is a suitable technique for observing mass loading levels on a time-resolved basis. In contrast, standard high-volume instruments are unable to demonstrate specialized events because of the long collection period involved. A comparison is presented for a typical day where the mass loading changed during the observed period but could not be observed with a single high-volume sample measurement. Time-averaged mass loading for 2-hr periods is demonstrated to be a useful tool in developing trend analysis for diurnal effects. |
| NASA分類 | ENVIRONMENT POLLUTION |
| レポートNO | 79A15122 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/429310 |
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