Climate Change Data Portal
DOI | 10.5194/tcd-9-3257-2015 |
Estimating supraglacial lake depth in western Greenland using Landsat 8 and comparison with other multispectral methods | |
Pope A.; Scambos T.A.; Moussavi M.; Tedesco M.; Willis M.; Shean D.; Grigsby S. | |
发表日期 | 2015 |
ISSN | 19940432 |
卷号 | 9期号:3 |
英文摘要 | Liquid water stored on the surface of ice sheets and glaciers impacts surface mass balance, ice dynamics, and heat transport. Supraglacial lakes, therefore, play a significant role in ice sheet behavior as a surface expression of the glacial hydrological system. Multispectral remote sensing can be used to detect supraglacial lakes and estimate their depth and area. In this study, we use in situ spectral and bathymetric data to assess lake depth retrieval using the recently launched Landsat 8 Operational Land Imager (OLI). We also extend our analysis to other multispectral sensors to evaluate their performance with similar methods. Digital elevation models derived from WorldView stereo imagery (pre-lake filling and post-drainage) are used to validate spectrally derived depths, combined with a lake edge determination from imagery. The optimal supraglacial lake depth retrieval is a physically based single-band model applied to two OLI bands independently (red and panchromatic) that are then averaged together. When OLI- and WorldView-derived depths are differenced, they yield a mean and standard deviation of 0.0 ± 1.6 m. This method is then applied to OLI data for the Sermeq Kujalleq (Jakobshavn Isbrae) region of Greenland to study the spatial and intra-seasonal variability of supraglacial lakes during summer 2014. We also give coefficients for estimating supraglacial lake depth using a similar method as OLI with other multispectral sensors. © Author(s) 2015. |
学科领域 | accuracy assessment; bathymetry; depth determination; digital elevation model; estimation method; glacial hydrology; glacial lake; Landsat; performance assessment; stereo image; water depth; Grenland; Norway; Telemark |
语种 | 英语 |
scopus关键词 | accuracy assessment; bathymetry; depth determination; digital elevation model; estimation method; glacial hydrology; glacial lake; Landsat; performance assessment; stereo image; water depth; Grenland; Norway; Telemark |
来源期刊 | Cryosphere Discussions |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119881 |
作者单位 | National Snow and Ice Data Center, University of Colorado, Boulder, Boulder, CO, United States; Cooperative Institute for Research in Earth Sciences, University of Colorado, Boulder, Boulder, CO, United States; Polar Science Center, Applied Physics Lab., University of Washington, Seattle, WA, United States; Earth Science and Observation Center, University of Colorado, Boulder, Boulder, CO, United States; City College of New York, CUNY, New York City, NY, United States; Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Geological Sciences, University of North Carolina, Chapel Hill, NC, United States |
推荐引用方式 GB/T 7714 | Pope A.,Scambos T.A.,Moussavi M.,et al. Estimating supraglacial lake depth in western Greenland using Landsat 8 and comparison with other multispectral methods[J],2015,9(3). |
APA | Pope A..,Scambos T.A..,Moussavi M..,Tedesco M..,Willis M..,...&Grigsby S..(2015).Estimating supraglacial lake depth in western Greenland using Landsat 8 and comparison with other multispectral methods.Cryosphere Discussions,9(3). |
MLA | Pope A.,et al."Estimating supraglacial lake depth in western Greenland using Landsat 8 and comparison with other multispectral methods".Cryosphere Discussions 9.3(2015). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。