Figure 6
From: Vhub: a knowledge management system to facilitate online collaborative volcano modeling and research
Plots of SO 2 VCD over Java, Indonesia on November 8, 2010 generated by OMIplot. Merapi volcano (central Java) is indicated by a triangle. (a) Lower troposphere (TRL) SO2 data; (b) Mid-troposphere (TRM) SO2 data; (c) Upper troposphere/lower stratosphere (STL) SO2 data. Gray regions denote data gaps, mostly due to meteorological clouds masking SO2 at lower assumed altitudes, and are more apparent in the TRL data due to the lower a-priori SO2 center of mass altitude. The OMI row anomaly can also result in data gaps (and hence SO2 mass underestimation) depending on the date and viewing geometry.