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Title: Depletion of ozone and its effect on night airglow intensity of Na 5893 Å at Srinagar and Halley Bay
Authors: Jana, P K
Nandi, S C
Sarkar, D
Keywords: Ozone depletion
Airglow emissions
Excitation mechanism
Issue Date: Dec-2006
Publisher: CSIR
Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City" downloadurl="http://www.5iamas-microsoft-com:office:smarttags"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region" downloadurl=""><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceName" downloadurl=""><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceType" downloadurl=""><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place" downloadurl=""> The paper presents the effect of O<sub>3</sub> depletion on night airglow emission of Na 5893<sup> </sup>Å line at Srinagar (34<sup>o</sup>N, 74.8<sup>o</sup>E), India and Halley Bay (76<sup>o</sup>S, 27<sup>o</sup>W), a British Antarctic survey station. Calculations based on chemical kinetics reveal that the airglow intensity of Na 5893 Å line is also affected due to ozone decline. The nature of yearly and seasonal variation of intensity of Na 5893 Å line for the above two stations are shown and compared. It is shown that the rate of decrease of yearly intensity of Na 5893 Å line is comparatively more at Halley Bay due to dramatic decrease of Antarctic O<sub>3</sub> concentration. During Antarctic spring time, stratospheric ozone is depleted dramatically at Antarctic region because of very low temperature (–80°C), elevated concentration of atomic chlorine and chlorine oxides, low abundances of nitrogen oxides and large appearance of polar stratospheric clouds (PSCs). </smarttagtype></smarttagtype></smarttagtype></smarttagtype></smarttagtype>
Description: 401-406
ISSN: 0367-8393
Appears in Collections:IJRSP Vol.35(6) [December 2006]

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