(IGP) Special Current Affairs Material for IAS (Pre) 2013 – PIB “Topic : Impact Of Black Carbon On Climate”

(IGP) Special Current Affairs Material for IAS (Pre) 2013

Chapter: Gist of Press Information
Bureau Articles

Topic: Impact Of Black Carbon On
Climate

Q. How Aerosols influence climate/ how black carbon aerosols
influence climate?

  • Aerosols influence climate indirectly by changing cloud
    properties and precipitation and hence can have a profound impact on the
    hydrological cycle.

  • Among the various aerosol types, black carbon aerosols
    have greater impact because of the high absorption of solar radiation.

  • Several studies have suggested that aerosols may modify
    global warming by changing the planetary albedo.


Q. Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB)?

  • The Integrated Campaign for Aerosols, gases and Radiation
    Budget (ICARB) was a multi- institutional, multi-instrumental,
    multi-platform field campaign, where integrated observation and measurements
    of aerosols with special emphasis on black carbon, radiation and trace gases
    along with other complementary measurements on boundary layers and
    meteorological parameters were made simultaneously.

  • The main goal of the ICARB was to assess the regional
    radiative impact of aerosols and trace gases, and to quantify the effect of
    the long-range transport of aerosols and trace gases, involving the Indian
    mainland, the Arabian Sea, the Bay of Bengal, and tropical Indian Ocean.

  • The ICARB was conceived as an integrated campaign,
    comprising three segments namely the land, ocean, and aircraft segments. In
    each one of these segments, measurements of the optical, physical and
    chemical properties of atmospheric aerosols were carried out.

  • The ISRO-GBP is maintaining 32 surface observatories
    covering representative locations in India. In all these sites black carbon
    measurements have been made. The duration of data available from these sites
    vary with location.

  • ICARB aircraft segment carried out a few measurements of
    altitude profiles of black carbon aerosols. Our knowledge on the OC/BC
    ratios are based on isolated measurements only. There are several aspects on
    which the knowledge and understanding is rather fragmented and inadequate.
    These include Vertical distribution of Black Carbon State of mixing of Black
    Carbon with other aerosols Organic Carbon / Black Carbon Ratio Effect of
    Black Carbon on Cloud Cover and Effect of Black Carbon on Monsoon.

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