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DOI | 10.1175/JAS-D-17-0102.1 |
Exact Expression for the Lifting Condensation Level | |
Romps, David M.1,2 | |
2017-12-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Many analytic, but approximate, expressions have been proposed for the height of the lifting condensation level (LCL), including the popular expressions by Espy, Bolton, and Lawrence. Here, the exact, explicit, analytic expression is derived for an air parcel's LCL as a function of its temperature and relative humidity. Unlike previous analytic expressions, some of which can have errors as high as hundreds or thousands of meters, this exact expression is accurate to within the uncertainty of empirical vapor pressure measurements: this translates into an uncertainty of around 5 m for all temperatures and relative humidities. An exact, explicit, analytic expression for the lifting deposition level (LDL) is also derived, and its behavior is compared to the LCL. At sufficiently cold temperatures, aerosols freeze homogeneously below the LCL; an approximate, implicit, analytic expression is given for this lifting freezing level (LFL). By comparing the LCL, LDL, and LFL, it is found that a well-mixed boundary layer can have an ice-supersaturated layer that is no thicker than 400 m. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418533900002 |
WOS关键词 | ICE NUCLEATION ; WATER ; TEMPERATURE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/29566 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 2.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Romps, David M.. Exact Expression for the Lifting Condensation Level[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(12). |
APA | Romps, David M..(2017).Exact Expression for the Lifting Condensation Level.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(12). |
MLA | Romps, David M.."Exact Expression for the Lifting Condensation Level".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.12(2017). |
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