Reproducibly estimating and evaluating supraglacial lake depth with Landsat 8 and other multispectral sensors
Reproducibly estimating and evaluating supraglacial lake depth with Landsat 8 and other multispectral sensors
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使用 Landsat 8 和其他多光谱传感器可重复地估算和评估冰上湖泊深度
DOI：
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发表时间：
2016
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通讯作者：
A. Pope
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作者：
A. Pope
形成于冰盖表面的湖泊（冰上湖泊）在冰盖水文系统中发挥着重要作用，作为融水的临时水库，可导致冰破裂和相关的冰流加速或冰架解体。卫星图像可用于监测冰上湖泊的范围和容量。在这项研究中，我们总结和扩展的方法，这样做，已被优化的多光谱成像仪搭载陆地卫星8。本报告完整记录了数据和软件（即，MATLAB和GDAL脚本），将可引用和可免费访问的数据（在ACADIS和Figshare中）通过共享（GitHub），描述（OntoSoft）和可引用（Zenodo）代码链接到发布的数字，如完整的出处图所述。此外，还提供了2015年Sermeq Kujalleq（雅各布港）地区新的冰上水量，并与2014年的结果进行了比较。2015年的湖泊在很大程度上与2014年相似，最大值和最小值出现在经常出现的区域;不同的行为可以通过混叠和年际温度变化来解释。实现完全开放，文件和再现性的挑战进行了讨论，以及更高的标准的可访问性和出处的例子，将促进原始研究。尽管如此，文档的相互依赖性可能会使可访问性难以实现。然而，如果最佳做法被纳入研究过程和工作流程，如这里所示，它将促进更完整和更有效的地球科学方法和结果的再现性和重用。
Lakes which form on the surface of ice sheets (supraglacial lakes) play an important role in the ice sheet hydrological system, serving as temporary reservoirs for meltwater that can lead to ice fracture and associated ice flow speedups or ice shelf disintegration. Satellite imagery can be used to monitor the extent and volume of supraglacial lakes. In this study, we summarize and expand on methods for doing this that have been optimized for the multispectral imager aboard Landsat 8. This report fully documents the data and software (i.e., MATLAB and GDAL scripts) used in these analyses, linking citeable and freely accessible data (in ACADIS and Figshare) to published figures via shared (GitHub), described (OntoSoft), and citeable (Zenodo) code as described in a full provenance diagram. In addition, new water supraglacial volumes for the Sermeq Kujalleq (Jakobshavn) region for 2015 are presented and compared to results from 2014. Lakes in 2015 largely behaved similarly to 2014, with maxima and minima occurring in recurrent areas; disparate behavior is explained both by aliasing and interannual temperature variability. The challenges of achieving full openness, documentation, and reproducibility are discussed, as well as examples where higher standards of accessibility and provenance would have facilitated the original research. Still, the interdependence of documentation can make accessibility challenging to achieve. However, if best practice is integrated into research processes and workflow, as demonstrated here, it will facilitate more complete and more effective reproducibility and reuse of geoscience methods and results.