干旱区生态环境知识资源中心(Arid): Estimating the sand saltation thresholds from Sentinel-1 SAR data in the Gobi Desert, Mongolia

Arid

DOI	10.1016/j.jaridenv.2022.104772
	Estimating the sand saltation thresholds from Sentinel-1 SAR data in the Gobi Desert, Mongolia
	Buyantogtokh, Batjargal; Kurosaki, Yasunori; Tsunekawa, Atsushi; Tsubo, Mitsuru; Ishizuka, Masahide; Gantsetseg, Batdelger; Batjargal, Gankhuyag
通讯作者	Buyantogtokh, B
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2022
卷号	202
英文摘要	Spatial information about the sand saltation threshold is essential to quantify sand transport and dust emission. Quantitatively estimating the threshold over a wide area is challenging, however, because its main influencing factors (surface roughness elements) are unknown. Here, we explored the use of Sentinel-1 Synthetic Aperture Radar (SAR) data to quantify surface roughness conditions and their temporal changes and map the threshold. Thresholds were obtained by in situ observations in dry spring periods during 2018-2020 at three year-round and eight temporary sites during natural sand and dust storms. We found a linear relationship (r = 0.91, p < 0.0001) between the SAR gamma naught VV intensity and the observed threshold where the site surface was stony or vegetated, indicating that SAR data can be used to quantify the spatial-temporal distribution of the threshold during dry periods. We then estimated thresholds from SAR data for spring 2017-2021 and found high thresholds on slopes and mountains, mainly due to stone and vegetation effects, whereas thresholds in the topographic depression varied because of changes in surface roughness conditions. Thresholds estimated from SAR data should greatly improve wide-area simulations of sand horizontal transport and dust emission fluxes by numerical dust models.
英文关键词	Arid region Surface roughness Synthetic aperture radar Threshold friction velocity Spatial distribution
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000804062400001
WOS关键词	ATMOSPHERIC DUST CYCLE ; SURFACE-ROUGHNESS ; SOIL-MOISTURE ; FRICTION VELOCITIES ; EMPIRICAL-MODEL ; ENTRAINMENT ; VEGETATION ; SEDIMENT ; RADAR ; WIND
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393298
推荐引用方式 GB/T 7714	Buyantogtokh, Batjargal,Kurosaki, Yasunori,Tsunekawa, Atsushi,et al. Estimating the sand saltation thresholds from Sentinel-1 SAR data in the Gobi Desert, Mongolia[J],2022,202.
APA	Buyantogtokh, Batjargal.,Kurosaki, Yasunori.,Tsunekawa, Atsushi.,Tsubo, Mitsuru.,Ishizuka, Masahide.,...&Batjargal, Gankhuyag.(2022).Estimating the sand saltation thresholds from Sentinel-1 SAR data in the Gobi Desert, Mongolia.JOURNAL OF ARID ENVIRONMENTS,202.
MLA	Buyantogtokh, Batjargal,et al."Estimating the sand saltation thresholds from Sentinel-1 SAR data in the Gobi Desert, Mongolia".JOURNAL OF ARID ENVIRONMENTS 202(2022).