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DOI | 10.5194/acp-18-15231-2018 |
Uncertainty of atmospheric microwave absorption model: impact on ground-based radiometer simulations and retrievals | |
Cimini, Domenico1,2; Rosenkranz, Philip W.3; Tretyakov, Mikhail Y.4; Koshelev, Maksim A.4; Romano, Filomena1 | |
2018-10-23 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:20页码:15231-15259 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; USA; Russia |
英文摘要 | This paper presents a general approach to quantify absorption model uncertainty due to uncertainty in the underlying spectroscopic parameters. The approach is applied to a widely used microwave absorption model (Rosenkranz, 2017) and radiative transfer calculations in the 20-60 GHz range, which are commonly exploited for atmospheric sounding by microwave radiometer (MWR). The approach, however, is not limited to any frequency range, observing geometry, or particular instrument. In the considered frequency range, relevant uncertainties come from water vapor and oxygen spectroscopic parameters. The uncertainty of the following parameters is found to dominate: (for water vapor) self-and foreign-continuum absorption coefficients, line broadening by dry air, line intensity, the temperaturedependence exponent for foreign-continuum absorption, and the line shift-to-broadening ratio; (for oxygen) line intensity, line broadening by dry air, line mixing, the temperaturedependence exponent for broadening, zero-frequency line broadening in air, and the temperature-dependence coefficient for line mixing. The full uncertainty covariance matrix is then computed for the set of spectroscopic parameters with significant impact. The impact of the spectroscopic parameter uncertainty covariance matrix on simulated downwelling microwave brightness temperatures (T B) in the 20-60 GHz range is calculated for six atmospheric climatology conditions. The uncertainty contribution to simulated T B ranges from 0.30K (subarctic winter) to 0.92K (tropical) at 22.2 GHz and from 2.73K (tropical) to 3.31K (subarctic winter) at 52.28 GHz. The uncertainty contribution is nearly zero at 55-60 GHz frequencies. Finally, the impact of spec-troscopic parameter uncertainty on ground-based MWR retrievals of temperature and humidity profiles is discussed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449021700003 |
WOS关键词 | RADIATIVE-TRANSFER MODEL ; LINE-COUPLING PARAMETERS ; FINE-STRUCTURE LINES ; WATER-VAPOR LINES ; OXYGEN BAND ; TEMPERATURE-DEPENDENCE ; CLOUD LIQUID ; HYPERFINE-STRUCTURE ; HALF-WIDTH ; 183 GHZ |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16182 |
专题 | 地球科学 |
作者单位 | 1.Natl Res Council Italy, Inst Methodol Environm Anal, I-85050 Potenza, Italy; 2.Univ Aquila, Ctr Excellence CETEMPS, I-67100 Laquila, Italy; 3.MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 4.Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia |
推荐引用方式 GB/T 7714 | Cimini, Domenico,Rosenkranz, Philip W.,Tretyakov, Mikhail Y.,et al. Uncertainty of atmospheric microwave absorption model: impact on ground-based radiometer simulations and retrievals[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(20):15231-15259. |
APA | Cimini, Domenico,Rosenkranz, Philip W.,Tretyakov, Mikhail Y.,Koshelev, Maksim A.,&Romano, Filomena.(2018).Uncertainty of atmospheric microwave absorption model: impact on ground-based radiometer simulations and retrievals.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(20),15231-15259. |
MLA | Cimini, Domenico,et al."Uncertainty of atmospheric microwave absorption model: impact on ground-based radiometer simulations and retrievals".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.20(2018):15231-15259. |
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