静止気象衛星「ひまわり」の画像による噴火噴煙の解析  [in Japanese] Analysis of Eruption Cloud with Geostationary Metheorological Satellite Imagery (HIMAWARI)  [in Japanese]

Access this Article

Search this Article

Abstract

The detection rate of eruption cloud with Geostationary Meteorological Satellite (GMS ; HIMAWARI in Japanese) is 12.1%, but GMS can detect and track, at a high rate of 81.5%, eruption cloud from a large explosive eruption higher than 10 km which may threaten aviation safety.<BR>Estimates of the top altitude of eruption clouds within the tropopause based on cloud-top temperature show fairly high values compared to those obtained by ground observations. Growth of vapor clouds over eruption clouds induced by strong ascending currents with eruption-onset may be the reason.<BR>Apparent dislocation of eruption clouds on GMS images due to the parallax of GMS is clarified for the case of the 1986 Izu-Oshima Eruption, Japan, and the underestimation of cloud-top is possibly due to warming of the cloud-surface by radiation from internal hot material.<BR>From inspections of the pattern of cloud-extent, type, strength, decay, and duration of eruption activity can be evaluated.<BR>Differential Thermal Infrared Imagery of GMS-5 is very effective for discriminating ashbearing cloud from ambient atmospheric cloud, but cannot clearly separate an eruption cloud with an extremely high content of water-vapor with phreatic/phreatomagmatic eruption.

Journal

  • Journal of geography

    Journal of geography 111(3), 374-394, 2002

    Tokyo Geographical Society

References:  44

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008701850
  • NII NACSIS-CAT ID (NCID)
    AN00322536
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0022135X
  • NDL Article ID
    6197180
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-169
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
Page Top