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DOI | 10.1029/2018WR023806 |
Improved Assessment of Atmospheric Water Vapor Content in the Himalayan Regions Around the Kullu Valley in India Using Landsat-8 Data | |
Varade, D.; Dikshit, O. | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:462-475 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | In this study, we present an approach for improved estimation of atmospheric water vapor content (WVC) from Landsat-8 data. The initial estimates of WVC derived from the split window covariance variance ratio (SWCVR) method are sequentially improved by two exponential models. The first model is designed to apply orographic corrections to the SWCVR estimate using a 1-arcsec Shuttle Radar Topography Mission digital elevation model based on a scale and bias parameter for the change in elevation. This model is based on the local change in elevation derived using the directional Kirsch compass kernel gradient. A second model for additional improvement in orographically corrected WVC estimate is defined based on the change in the normalized differenced vegetation index (NDVI) with three parameters, a scale and bias parameter for the change in NDVI and one bias parameter for the WVC estimate. The scale and bias parameters in orographic correction and the NDVI-based correction are derived using regression between a selected training subset of WVC estimates (SWCVR estimate for orographic correction and orographically corrected WVC estimate for the NDVI-based correction) and the corresponding Sentinel-3 Ocean Land Color Instrument (OLCI) integrated water vapor (IWV) product. The study is conducted over the Himalayan regions around Kullu, Himachal Pradesh, India, for two dates, 20 September 2017 and 26 January 2018, corresponding to the autumn and peak winter season in the region. A reduction in error of 0.32and 0.04gm/cm(2) was observed in proposed WVC estimate and the Sentinel-3 integrated water vapor product, for the two data sets respectively. |
英文关键词 | water vapor orthographic correction split window method Landsat-8 thermal infrared Himalaya |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500026 |
WOS关键词 | LAND-SURFACE TEMPERATURE ; SPLIT-WINDOW ALGORITHM ; PRECIPITABLE WATER ; AVHRR DATA ; RETRIEVAL ; MOISTURE ; IMPACT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21968 |
专题 | 资源环境科学 |
作者单位 | Indian Inst Technol Kanpur, Dept Civil Engn, Geoinformat, Kanpur, Uttar Pradesh, India |
推荐引用方式 GB/T 7714 | Varade, D.,Dikshit, O.. Improved Assessment of Atmospheric Water Vapor Content in the Himalayan Regions Around the Kullu Valley in India Using Landsat-8 Data[J]. WATER RESOURCES RESEARCH,2019,55(1):462-475. |
APA | Varade, D.,&Dikshit, O..(2019).Improved Assessment of Atmospheric Water Vapor Content in the Himalayan Regions Around the Kullu Valley in India Using Landsat-8 Data.WATER RESOURCES RESEARCH,55(1),462-475. |
MLA | Varade, D.,et al."Improved Assessment of Atmospheric Water Vapor Content in the Himalayan Regions Around the Kullu Valley in India Using Landsat-8 Data".WATER RESOURCES RESEARCH 55.1(2019):462-475. |
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