| タイトル | Polarization signatures for abandoned agricultural fields in the Manix Basin area of the Mojave Desert |
| 著者（英） | Vanzyl, Jakob J.; Ray, Terrill W.; Farr, Tom G. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1991-08-01 |
| 言語 | eng |
| 内容記述 | Polarimetric signatures from abandoned circular alfalfa fields in the Manix Basin area of the Mojave desert show systematic changes with length of abandonment. The obliteration of circular planting rows by surface processes could account for the disappearance of bright 'spokes', which seems to be reflection patterns from remnants of the planting rows, with increasing length of abandonment. An observed shift in the location of the maximum L-band copolarization return away from VV, as well as an increase in surface roughness, both occurring with increasing age of abandonment, seems to be attributable to the formation of wind ripple on the relatively vegetationless fields. A Late Pleistocene/Holocene sand bar deposit, which can be identified in the radar images, is probably responsible for the failure of three fields to match the age sequence patterns in roughness and peak shift. |
| NASA分類 | COMMUNICATIONS AND RADAR |
| レポートNO | 92N28025 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/231165 |
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