12-14 September, 2011, Lucknow - Earth Science India
12-14 September, 2011, Lucknow - Earth Science India
12-14 September, 2011, Lucknow - Earth Science India
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
National Conference on <strong>Science</strong> of Climate Change and <strong>Earth</strong>’s Sustainability: Issues and Challenges ‘A Scientist-People Partnership’<br />
<strong>12</strong>-<strong>14</strong> <strong>September</strong>, <strong>2011</strong>, <strong>Lucknow</strong><br />
constitutes biotic (biological) and abiotic (non biological) components both. Presence of<br />
biological constituents in the particulate matter increases number of cloud drops and<br />
decreases the rain intensity and also causes incidences of infectious diseases resulted<br />
into the attraction of scientific community worldwide towards the biological study of<br />
aerosol. But in <strong>India</strong> little attention has been given so far in-spite of this fact that 40%<br />
<strong>India</strong>n population living on the bank of Indo-Gangetic plain are experiencing a large<br />
number of diseases like asthama, bronchitis, malaria, chickengunia, monkeygunia and<br />
other respiratory and cardiovascular diseases. The present study deals with biochemical<br />
characterization of aerosol at Dayalbagh, Agra, a suburban site of <strong>India</strong>. Biological<br />
concentration increases with increase in the level of particulate matter and there have<br />
been differences in the types of species. Chemical characterizations of aerosols were<br />
also carried out with aim to study the level of tracer species as they are known to<br />
exacerbate the biological activities.<br />
STUDY OF PLASMA BUBBLES USING GPS DATA AT<br />
LOW LATITUDE GROUND STATION VARANASI<br />
S. Priyadarshi, S. Kumar and A.K. Singh<br />
Atmospheric Research Lab., Department of Physics, BHU, Varanasi-221005<br />
Equatorial Plasma Bubbles (EPBs) are plasma density depletions and accompanying<br />
plumes of irregularities that give rise to severe radio signal disruptions. These<br />
ionospheric irregularities not only can reduce the accuracy of GPS/Satellite Based<br />
Augmentation System (SBAS) receiver pseudo-range and carrier phase measurement<br />
but also can result in a complete loss of lock on a satellite. To study the characteristics<br />
of ionospheric plasma bubbles during the solar minimum period, we have analyzed the<br />
GPS based measurements of Slant Total Electron Content (STEC) data using method of<br />
Portillo et al. (2008) from May 2007 to May <strong>2011</strong>. It is observed the equatorial plasma<br />
bubbles of duration 61 to 176 minutes and maximum depletion in the density of plasma<br />
bubble of 8.04 TEC units. The maximum occurrence of plasma bubbles has been<br />
observed in equinox months for each year. These observations of plasma bubbles are<br />
discussed with other reported results.<br />
31