title: Three-dimensional concentration mapping of gases using a portable mass spectrometer system.
abstract: The visualization of hazardous gaseous emissions at volcanoes using in-situ mass spectrometry (MS) is a key step towards a better comprehension of the geophysical phenomena surrounding eruptive activity. In-situ data consisting of helium, carbon dioxide, sulfur dioxide, and other gas species, were acquired with a quadrupole based MS system. Global position systems (GPS) and MS data were plotted on ground imagery, topography, and remote sensing data collected by a host of instruments during the second Costa Rica Airborne Research and Technology Applications (CARTA) mission. This combination of gas and imaging data allowed three-dimensional (3D) visualization of the volcanic plume and the mapping of gas concentration at several volcanic structures and urban areas. This combined set of data has demonstrated a better tool to assess hazardous conditions by visualizing and modeling of possible scenarios of volcanic activity. The MS system is used for in-situ measurement of 3D gas concentrations at different volcanic locations with three different transportation platforms: aircraft, auto, and hand-carried. The demonstration for urban contamination mapping is also presented as another possible use for the MS system.
authors.affiliation: NASA, NE-L2, Kennedy Space Center, Florida 32815-0087, USA. Timothy.P.Griffin@NASA.gov
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Griffin
authors.forename: Jorge Andres
authors.initials: JA
authors.lastname: Diaz
authors.forename: C Richard
authors.initials: CR
authors.lastname: Arkin
authors.forename: Carlomagno
authors.initials: C
authors.lastname: Soto
authors.forename: Charles H
authors.initials: CH
authors.lastname: Curley
authors.forename: Oliver
authors.initials: O
authors.lastname: Gomez
mesh_terms: D000397:Air Pollution / Q000032:analysis; D000401:Aircraft; D001336:Automobiles; D002245:Carbon Dioxide / Q000032:analysis; D003364:Costa Rica; D005740:Gases / Q000032:analysis*; D013058:Mass Spectrometry / Q000295:instrumentation* / Q000379:methods*; D013458:Sulfur Dioxide / Q000032:analysis; D018707:Volcanic Eruptions / Q000032:analysis*; D014867:Water / Q000032:analysis
chemical_list: D005740:Gases; D014867:Water; D013458:Sulfur Dioxide; D002245:Carbon Dioxide