Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2018.04.003 |
A timelapse camera dataset and Markov model of dust devil activity at Eldorado playa, Nevada, USA | |
Lorenz, Ralph D.1; Jackson, Brian K.2; Lanagan, Peter D.3 | |
通讯作者 | Lorenz, Ralph D. |
来源期刊 | AEOLIAN RESEARCH
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ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2018 |
卷号 | 33页码:33-43 |
英文摘要 | We report a May-June 2015 survey of dust devil activity on a Nevada desert playa using an inexpensive digital timelapse camera. We discuss techniques for exploiting the large volume of data (similar to 32,700 images, made publicly-available) generated in these observations, similar to imaging from Mars landers and rovers, noting the diurnal image filesize variations as a useful quick-look metric of weather conditions. We present results from a semi-automated image classification: this classification is available to other workers, for example for bench marking automated procedures. The acquisition of images at 1/min for some 36 days permits study of the diurnal variation of dust devil activity (e.g. 85% of the dust devil images [i.e. those images manually classified as showing dust devils] occur between 12:00 and 17:00; during the period of peak activity 13:00-15:00 about 7% of images contain well-defined dust devils of several meters diameter or larger). The data also permit the dependence of dust devil characteristics on ambient conditions. We construct a simple two-state Markov model for the occurrence and persistence of dust devils (a few per cent chance that new dust devil activity appears in the next image; and a similar to 45% chance that activity stops) which may help inform strategies for acquiring and interpreting field observations. |
英文关键词 | Dust devils Meteorology |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000442332800004 |
WOS关键词 | TERRESTRIAL ; MARS |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207240 |
作者单位 | 1.Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA; 2.Boise State Univ, Dept Phys, 1910 Univ Dr, Boise, ID 83725 USA; 3.Coll Southern Nevada, Dept Phys Sci, 700 Coll Dr, Henderson, NV 89002 USA |
推荐引用方式 GB/T 7714 | Lorenz, Ralph D.,Jackson, Brian K.,Lanagan, Peter D.. A timelapse camera dataset and Markov model of dust devil activity at Eldorado playa, Nevada, USA[J],2018,33:33-43. |
APA | Lorenz, Ralph D.,Jackson, Brian K.,&Lanagan, Peter D..(2018).A timelapse camera dataset and Markov model of dust devil activity at Eldorado playa, Nevada, USA.AEOLIAN RESEARCH,33,33-43. |
MLA | Lorenz, Ralph D.,et al."A timelapse camera dataset and Markov model of dust devil activity at Eldorado playa, Nevada, USA".AEOLIAN RESEARCH 33(2018):33-43. |
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