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Rechercher

OSUG - Terre Univers Environnement OSUG

Pyramid

par Administrateur Un - 14 février 2011 - ( maj : 14 février 2011 )

BACKGROUND

The Himalayan-Karakorum range separates two of the world’s most densely populated developing countries, India and China where demands for energy and mobility have increased simultaneously with the intensification of industrial activities and vehicular traffic. This leads to a growth of anthropogenic pollutant emissions, as pointed out in recent studies of the United Nations Environmental Program (UNEP). These emissions increase the concentrations of aerosol, greenhouse gases and ozone precursors, promoting intense photochemical smog episodes. Studies concerning Asian Brown Cloud have shown that the haze blocks up to 15% of the Sun’s radiation causing a possible cooling of the ground and a heating of the atmosphere, which can affect monsoons and other rainfall patterns.

Thus, in this area, the continuous monitoring of atmospheric composition represents a necessary activity to well evaluate the impact of the human activities on the environment. Nevertheless, due to technical and logistic difficulties to carry out continuous measurements at high altitude in Himalayas, no systematic observations of atmospheric constituents are available in this area still now

For these reasons, as part of SHARE-Asia experiment, a remote monitoring station (the "ABC-Pyr Laboratory") has been installed in the framework of the "High Altitude ABC monitoring stations in Himalaya and Karakorum" task.

WHY

  • to obtain a chemical climatology of aerosol properties (optical, chemical and physical) at an high elevation site in Hymalaias over the duration of the SHARE-Asia experiment ;
  • to evaluate temporal trends of aerosol composition as a function of sources/transport ;
  • to evaluate the variations of radiative forcing produced by aerosols ;
  • to study the background ozone behavior and evaluate the contributions of stratospheric ozone intrusions as well as long range and regional transport of polluted air masses
  • to monitor the concentration trends of major Halocarbons and greenhouse gases

WHERE

The remote monitoring station ABC-Pyr Laboratory has been installed in the Khumbu valley (Nepal), at 5079 m a.s.l . not far from the Italian Pyramid Observatory.

(taken from the project web site)

Voir en ligne : Pyramid homepage