globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017JD026773
论文题名:
The equations of motion for moist atmospheric air
作者: Makarieva A.M.; Gorshkov V.G.; Nefiodov A.V.; Sheil D.; Nobre A.D.; Bunyard P.; Nobre P.; Li B.-L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期:14
起始页码: 7300
结束页码: 7307
语种: 英语
英文关键词: condensation ; evaporation
英文摘要: How phase transitions affect the motion of moist atmospheric air remains controversial. In the early 2000s two distinct differential equations of motion were proposed. Besides their contrasting formulations for the acceleration of condensate, the equations differ concerning the presence/absence of a term equal to the rate of phase transitions multiplied by the difference in velocity between condensate and air. This term was interpreted in the literature as the “reactive motion” associated with condensation. The reasoning behind this reactive motion was that when water vapor condenses and droplets begin to fall the remaining gas must move upward to conserve momentum. Here we show that the two contrasting formulations imply distinct assumptions about how gaseous air and condensate particles interact. We show that these assumptions cannot be simultaneously applicable to condensation and evaporation. Reactive motion leading to an upward acceleration of air during condensation does not exist. The reactive motion term can be justified for evaporation only; it describes the downward acceleration of air. We emphasize the difference between the equations of motion (i.e., equations constraining velocity) and those constraining momentum (i.e., equations of motion and continuity combined). We show that owing to the imprecise nature of the continuity equations, consideration of total momentum can be misleading and that this led to the reactive motion controversy. Finally, we provide a revised and generally applicable equation for the motion of moist air. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: DP160102107
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62614
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Theoretical Physics Division, Petersburg Nuclear Physics Institute, St. Petersburg, Russian Federation; USDA-China MOST Joint Research Center for AgroEcology and Sustainability, University of California, Riverside, CA, United States; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway; Centro de Ciência do Sistema Terrestre INPE, São José dos Campos, São Paulo, Brazil; Lawellen Farm, Withiel, Bodmin, United Kingdom; University Sergio Arboleda, Bogota, Colombia; Center for Weather Forecast and Climate Studies INPE, São José dos Campos, São Paulo, Brazil

Recommended Citation:
Makarieva A.M.,Gorshkov V.G.,Nefiodov A.V.,et al. The equations of motion for moist atmospheric air[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)
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