| Автор | Wasson, John T. |
| Автор | Kyte, Frank T. |
| Дата выпуска | 1987 |
| dc.description | Frank et al. (1986a) inferred a terrestrial mass influx of 10<sup>8</sup> g icy comets of ∼10<sup>15</sup>g a<sup>−1</sup>. About 20‐40% of the mass of known comets is comprised of chondritic rocky matter, thus the associated influx of chondritic matter is inferred to be at least 2 · 10<sup>14</sup> g a<sup>−1</sup>. Iridium‐accumulation evidence indicates a total influx of chondritic extraterrestrial matter having masses in the range 10<sup>−14</sup> to 10<sup>17</sup> g of 7.8 · 10<sup>10</sup> g a<sup>−1</sup>, 2500 times smaller; >99% of this infalling matter is in masses <10<sup>−2</sup> g or >10<sup>11</sup> g. For bodies in the 10<sup>7</sup>‐10<sup>9</sup> g range the inferred flux is 10<sup>8</sup> g a<sup>−1</sup>, a factor of 2 · 10<sup>6</sup> lower than that inferred for the Frank et al. comets. Because there must be devolatilized objects in the same population, the actual discrepancy is larger, probably ∼3 · 10<sup>9</sup>. |
| Формат | application.pdf |
| Копирайт | Copyright 1986 by the American Geophysical Union. |
| Тема | OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL |
| Тема | Geochemistry |
| Тема | PLANETARY SCIENCES: COMETS AND SMALL BODIES |
| Тема | Planetology: Comets and Small Bodies: Composition |
| Тема | Planetology: Comets and Small Bodies: Dust |
| Тема | Planetology: Comets and Small Bodies: Origin and evolution |
| Название | Comment on the letter “On the influx of small comets into the Earth's atmosphere II: Interpretation” |
| Тип | commentary |
| DOI | 10.1029/GL014i007p00779 |
| Electronic ISSN | 1944-8007 |
| Print ISSN | 0094-8276 |
| Журнал | Geophysical Research Letters |
| Том | 14 |
| Первая страница | 779 |
| Последняя страница | 780 |
| Выпуск | 7 |
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| Библиографическая ссылка | Frank, L. A., J. B.Sigwarth, J. D.Craven, Reply to Morris, Geophys. Res. Lett., 13, 1484–1486, 1986c. |
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