资源环境科技发展态势分析平台

ArcticDEM is an open-access collection of high-resolution (2m), repeat, digital surface models, created from submeter resolution, stereoscopic satellite imagery, covering the entire Arctic landmass. To demonstrate the application of this powerful new data source for measuring Earth surface change, we measure elevation changes resulting from the 2012-2013 eruption of Tolbachik volcano in Kamchatka, Russia, which reveals detailed variations in lava thickness. We estimate a total lava volume of 0.5730.007km(3) emplaced over an area of 45.8km(2) at a mean rate of 21m(3)/s. Furthermore, the size and timing of eruptions over the past 2,000years support the hypothesis that the combined eruptions of 1976-77 and 2012-2013 ejected much or all of the magma stored over the previous similar to 1,000years, so that a multicentury repose is expected. The approaches developed in this study will guide future, expanded applications of ArcticDEM to mapping terrain change.