• A personal note on IGBP and the social sciences

    Humans are an integral component of the Earth system as conceptualised by IGBP. João Morais recalls key milestones in IGBP’s engagement with the social sciences and offers some words of advice for Future Earth.
  • IGBP and Earth observation:
    a co-evolution

    The iconic images of Earth beamed back by the earliest spacecraft helped to galvanise interest in our planet’s environment. The subsequent evolution and development of satellites for Earth observation has been intricately linked with that of IGBP and other global-change research programmes, write Jack Kaye and Cat Downy .

Size change of Asian dust particles caused by sea salt interaction: Measurements in southwestern Japan

Geophysical Research Letters (2004)
Daizhou Z and Iwasaka Y (eds)
Doi: 10.1029/2004GL020087
Vol 31; Issue 15; L15102

Water dialysis was applied to remove water-soluble components in the individual Asian dust particles collected in southwestern Japan. Size and composition of the particles before and after the dialysis were compared. It was found that the post-dialysis number-size distributions of mineral-sea salt mixture particles shifted toward smaller ranges compared to their pre-dialysis distributions and the more sea salt the particles contained the larger the shift of their distribution was, while the dialysis did not cause apparent changes in size or morphology of particles in which sea salt was not identified. Estimation from total detected dust particles revealed that mixing with sea salt had caused their size distributions to shift to larger ranges approximately by 0.4 ∼ 0.8 μm. Hence, the interaction of dust particles and sea salt is likely an important process in size and composition changes of dust particles during their long range transport, consequently affecting mass transformation and radiation transfer in the atmosphere as well as the sedimental flux of mineral dust to sea surface.

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