Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-17545-2018 |
The impact of mineral dust on cloud formation during the Saharan dust event in April 2014 over Europe | |
Weger, Michael1; Heinold, Bernd1; Engler, Christa2,9; Schumann, Ulrich6; Seifert, Axel4; Foessig, Romy3; Voigt, Christiane6,7; Baars, Holger1; Blahak, Ulrich4; Borrmann, Stephan7,8; Hoose, Corinna3; Kaufmann, Stefan6; Kraemer, Martina5; Seifert, Patric1; Senf, Fabian1; Schneider, Johannes8; Tegen, Ina1 | |
2018-12-11 | |
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:23页码:17545-17572 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | A regional modeling study on the impact of desert dust on cloud formation is presented for a major Saharan dust outbreak over Europe from 2 to 5 April 2014. The dust event coincided with an extensive and dense cirrus cloud layer, suggesting an influence of dust on atmospheric ice nucleation. Using interactive simulation with the regional dust model COSMO-MUSCAT, we investigate cloud and precipitation representation in the model and test the sensitivity of cloud parameters to dust-cloud and dust-radiation interactions of the simulated dust plume. We evaluate model results with ground-based and spaceborne remote sensing measurements of aerosol and cloud properties, as well as the in situ measurements obtained during the ML-CIRRUS aircraft campaign. A run of the model with single-moment bulk microphysics without online dust feedback considerably underestimated cirrus cloud cover over Germany in the comparison with infrared satellite imagery. This was also reflected in simulated upper-tropospheric ice water content (IWC), which accounted for only 20% of the observed values. The interactive dust simulation with COSMO-MUSCAT, including a two-moment bulk microphysics scheme and dust-cloud as well as dust-radiation feedback, in contrast, led to significant improvements. The modeled cirrus cloud cover and IWC were by at least a factor of 2 higher in the relevant altitudes compared to the noninteractive model run. We attributed these improvements mainly to enhanced deposition freezing in response to the high mineral dust concentrations. This was corroborated further in a significant decrease in ice particle radii towards more realistic values, compared to in situ measurements from the ML-CIRRUS aircraft campaign. By testing different empirical ice nucleation parameterizations, we further demonstrate that remaining uncertainties in the ice-nucleating properties of mineral dust affect the model performance at least as significantly as including the online representation of the mineral dust distribution. Dust-radiation interactions played a secondary role for cirrus cloud formation, but contributed to a more realistic representation of precipitation by suppressing moist convection in southern Germany. In addition, a too-low specific humidity in the 7 to 10 km altitude range in the boundary conditions was identified as one of the main reasons for misrepresentation of cirrus clouds in this model study. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452770900006 |
WOS关键词 | HETEROGENEOUS ICE NUCLEATION ; MIXED-PHASE CLOUDS ; CIRRUS CLOUDS ; PARTICLE CONCENTRATIONS ; RAMAN-POLARIZATION ; MODELING SYSTEM ; DESERT DUST ; AEROSOL ; PARAMETERIZATION ; TRANSPORT |
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/22806 |
专题 | 地球科学 |
作者单位 | 1.Leibniz Inst Tropospher Res, Leipzig, Germany; 2.Univ Leipzig, Leipzig Inst Meteorol, Leipzig, Germany; 3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Karlsruhe, Germany; 4.Deutsch Wetterdienst, Offenbach, Germany; 5.Forschungszentrum Julich, Julich, Germany; 6.Deutsch Zentrum Luft & Raumfahrt, Inst Phys Atmosphare, Oberpfaffenhofen, Germany; 7.Johannes Gutenberg Univ Mainz, Mainz, Germany; 8.Max Planck Inst Chem, Mainz, Germany; 9.Leibniz Inst Tropospher Res, Leipzig, Germany |
推荐引用方式 GB/T 7714 | Weger, Michael,Heinold, Bernd,Engler, Christa,et al. The impact of mineral dust on cloud formation during the Saharan dust event in April 2014 over Europe[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(23):17545-17572. |
APA | Weger, Michael.,Heinold, Bernd.,Engler, Christa.,Schumann, Ulrich.,Seifert, Axel.,...&Tegen, Ina.(2018).The impact of mineral dust on cloud formation during the Saharan dust event in April 2014 over Europe.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),17545-17572. |
MLA | Weger, Michael,et al."The impact of mineral dust on cloud formation during the Saharan dust event in April 2014 over Europe".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):17545-17572. |
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