Monitoring middle-atmospheric water vapor over Seoul by using a 22 GHz ground-based radiometer, SWARA
DC Field | Value | Language |
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dc.contributor.author | Ka, Soohyun | - |
dc.contributor.author | De Wachter, Evelyn | - |
dc.contributor.author | Kaempfer, Niklaus | - |
dc.contributor.author | Oh, Jung Jin | - |
dc.date.available | 2021-02-22T14:03:07Z | - |
dc.date.issued | 2010-10 | - |
dc.identifier.issn | 0277-786X | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/13619 | - |
dc.description.abstract | Water vapor is the strongest natural greenhouse gas in the atmosphere. It is most abundant in the troposphere at low altitudes, due to evaporation at the ocean surface, with maximum values of around 6 g/kg. The amount of water vapor reaches a minimum at tropopause level and increases again in the middle atmosphere through oxidation of methane and vertical transport. Water vapor has both positive and negative effects on global warming, and we need to study how it works on climate change by monitoring water vapor concentration in the middle atmosphere. In this paper, we focus on the 22 GHz ground-based radiometer called SWARA (Seoul Water vapor Radiometer) which has been operated at Sookmyung women's university in Seoul, Korea since Oct. 2006. It is a joint project of the University of Bern, Switzerland, and the Sookmyung Women's University of Seoul, South Korea. The SWARA receives 22.235 GHz emitted from water vapor spontaneously and converts down to 1.5 GHz with +/- 0.5 GHz band width in 61 kHz resolution. To represent 22.235 GHz water vapor spectrum precisely, we need some calibration methods because the signal shows very weak intensity in ∼0.1 K on the ground. For SWARA, we have used the balancing and the tipping curve methods for a calibration. To retrieve the water vapor profile, we have applied ARTS and Qpack software. In this paper, we will present the calibration methods and water vapor variation over Seoul for the last 4 years. © 2010 SPIE. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | SPIE | - |
dc.title | Monitoring middle-atmospheric water vapor over Seoul by using a 22 GHz ground-based radiometer, SWARA | - |
dc.type | Article | - |
dc.publisher.location | 대한민국 | - |
dc.identifier.doi | 10.1117/12.869501 | - |
dc.identifier.scopusid | 2-s2.0-78651079855 | - |
dc.identifier.bibliographicCitation | Proceedings of SPIE - The International Society for Optical Engineering, v.7859 | - |
dc.citation.title | Proceedings of SPIE - The International Society for Optical Engineering | - |
dc.citation.volume | 7859 | - |
dc.type.docType | Conference Paper | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | Atmospheric water vapor | - |
dc.subject.keywordPlus | Calibration method | - |
dc.subject.keywordPlus | Curve method | - |
dc.subject.keywordPlus | GHz band | - |
dc.subject.keywordPlus | Ground-based radiometers | - |
dc.subject.keywordPlus | Joint projects | - |
dc.subject.keywordPlus | Low altitudes | - |
dc.subject.keywordPlus | Maximum values | - |
dc.subject.keywordPlus | Middle atmosphere | - |
dc.subject.keywordPlus | Ocean surfaces | - |
dc.subject.keywordPlus | Oxidation of methane | - |
dc.subject.keywordPlus | Positive and negative effect | - |
dc.subject.keywordPlus | Retrieval | - |
dc.subject.keywordPlus | Seoul , Korea | - |
dc.subject.keywordPlus | Seoul , South Korea | - |
dc.subject.keywordPlus | Switzerland | - |
dc.subject.keywordPlus | University of Bern | - |
dc.subject.keywordPlus | Vapor spectra | - |
dc.subject.keywordPlus | Vertical transports | - |
dc.subject.keywordPlus | Water vapor concentration | - |
dc.subject.keywordPlus | Water vapor profile | - |
dc.subject.keywordPlus | Water vapor radiometers | - |
dc.subject.keywordPlus | Water vapor variations | - |
dc.subject.keywordPlus | Weak intensity | - |
dc.subject.keywordPlus | Calibration | - |
dc.subject.keywordPlus | Clouds | - |
dc.subject.keywordPlus | Global warming | - |
dc.subject.keywordPlus | Greenhouse gases | - |
dc.subject.keywordPlus | Meteorological instruments | - |
dc.subject.keywordPlus | Methane | - |
dc.subject.keywordPlus | Radiometers | - |
dc.subject.keywordPlus | Radiometry | - |
dc.subject.keywordPlus | Remote sensing | - |
dc.subject.keywordPlus | Water vapor | - |
dc.subject.keywordAuthor | Microwave | - |
dc.subject.keywordAuthor | Middle atmosphere | - |
dc.subject.keywordAuthor | Remote Sensing | - |
dc.subject.keywordAuthor | Retrieval | - |
dc.subject.keywordAuthor | Water vapor | - |
dc.identifier.url | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7859/1/Monitoring-middle-atmospheric-water-vapor-over-Seoul-by-using-a/10.1117/12.869501.short?SSO=1 | - |
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