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The Ozone above Middle Asia

#KR-1990


Monitoring of the Ozone Vertical Distribution in Stratosphere and Mesosphere Above Middle Asia Region by Radio Astronomical Methods in the Millimeter Waveband

Tech Area / Field

  • INF-SIG/Sensors and Signal Processing/Information and Communications
  • PHY-RAW/Radiofrequency Waves/Physics

Status
3 Approved without Funding

Registration date
07.12.2011

Leading Institute
Institute of Physicotechnical Problems and Materials Science, Kyrgyzstan, Bishkek

Collaborators

  • Institute of Applied Physics, Switzerland, Bern\nDepartment of the Navy / Naval Research Laboratory, USA, DC, Washington\nTechnische Universität Darmstadt / Institute of Applied Physics, Germany, Darmstadt

Project summary

The project prosecutes the completed in 2006 ISTC project # KR-634 “Equipment and methods of the ozone layer monitoring above Middle Asia region by radio astronomic methods in millimeter waveband”, aimed at creation of the microwave observatory for observation of atmospheric ozone rotational spectrum lines in the Kyrgyz Republic to control full content and vertical distribution of ozone in this region, and also continues a completed in 2011 ISTC project # KR-1527 “Monitoring of the ozone layer above the Middle Asia region by radioastronomical methods in millimeter waveband”, the main purpose of whish was launching scientific researches of the Earth’s middle atmosphere – the area, integrating the stratosphere and mesosphere. In a new project the tested microwave radiospectrometer of millimeter waveband, located in created observatory in Karaoi village of Issyk-Kul region, Kyrgyz Republic, will be used for continuation of a program of scientific researches concerning long-term monitoring of the ozone vertical distribution in stratosphere and mesosphere with the purpose of investigation of ozonosphere evolution in conditions of natural and man-caused factors influence.
It is necessary to note that the middle atmosphere is a part of the earth’s atmosphere, exclusive from the point of view of occurring in it processes. These processes are of interest not only as natural phenomena, but they greatly influence upper and lower layers of atmosphere and all earth’s atmosphere in global scales. It is important, that quasi-continuous observations, ensured with the device created during the previous ISTC project fulfillment, give a unique possibility of the ozone concentration diurnal retrieval at different altitudes in middle atmosphere, that is extremely important from the point of view of the above mentioned phenomena research. Shared analysis of these data with the satellite data (for the first place, with MLS device data, installed on the launched in July, 2004 satellite Aura) as well as data of stratosphere monitoring network enable to essentially advance understanding of processes occurring in middle atmosphere, and to explain the observed changeability of them.
Now global monitoring of spatial temporal evolution of the ozone Earth’s layer is mainly realized by satellite tools (MLS, GOMOS, GOME, SCIAMACHY, MIPAS, ACE-FTS, APS, GOME-2, HALOE, MAESTRO, OSIRIS, SABER, SAGE II, SAGE III), which produce a continuous passive monitoring of atmosphere in a large range of wave-length (ultraviolet, infrared, millimeter). At the heart of these instruments operation is a limb method, when periodic rather short (due to the fast satellite rotation relative to the Earth) scanning of the atmosphere self-radiation (adsorption) spectrum with a high horizontal resolution (around 600-700 km) is produced. Therefore a problem of the results validation of the ozone Earth’s layer satellite monitoring is urgent, which also will be decided within the frameworks of this project.
To increase a quality of obtained results new instrumental and methodical developments are planned. Namely, one propose to enlarge vertical interval of sounding and to improve quality of the ozone vertical profile retrieval due to link-up of additional channel of spectral analysis on the basis of up-to-date digital spectroanalyzer ensuring spectral resolution more than an order exceeding a resolution of the available now device and due to reliable measurements calibration. Spectral resolution improvement respectively increases a limited possible sounding height. Besides, a problem will be solving concerning optimization of widths and quantity of spectral channels (in other words, spectral channels arrangement), enabling getting maximum information from initial observation data and minimizing uncertainty of the ozone concentration values retrieving depending on a height.
A character of atmospheric processes is a little bit different in different geographical regions, therefore their understanding in global scales requires regular similar measurements in different points. As a whole, the work on this proposed project will include regular measurements of the ozone distribution in Kyrgyzstan together with simultaneous similar measurements in other regions, as well as processing, analysis, and interpretation of obtained data, modernization of spectroradiometer, preventing technical maintenance and, if necessary, damage control.


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