Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-4731-2017 |
Direct comparisons of ice cloud macro- and microphysical properties simulated by the Community Atmosphere Model version 5 with HIPPO aircraft observations | |
Wu, Chenglai1,2; Liu, Xiaohong1; Diao, Minghui3; Zhang, Kai4; Gettelman, Andrew5; Lu, Zheng1; Penner, Joyce E.6; Lin, Zhaohui2 | |
2017-04-11 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | In this study we evaluate cloud properties simulated by the Community Atmosphere Model version 5 (CAM5) using in situ measurements from the HIAPER Poleto- Pole Observations (HIPPO) campaign for the period of 2009 to 2011. The modeled wind and temperature are nudged towards reanalysis. Model results collocated with HIPPO flight tracks are directly compared with the observations, and model sensitivities to the representations of ice nucleation and growth are also examined. Generally, CAM5 is able to capture specific cloud systems in terms of vertical configuration and horizontal extension. In total, the model reproduces 79.8% of observed cloud occurrences inside model grid boxes and even higher (94.3 %) for ice clouds (T <= 40 degrees C). The missing cloud occurrences in the model are primarily ascribed to the fact that the model cannot account for the high spatial variability of observed relative humidity (RH). Furthermore, model RH biases are mostly attributed to the discrepancies in water vapor, rather than temperature. At the micro-scale of ice clouds, the model captures the observed increase of ice crystal mean sizes with temperature, albeit with smaller sizes than the observations. The model underestimates the observed ice number concentration (N-i) and ice water content (IWC) for ice crystals larger than 75 mu m in diameter. Modeled IWC and N i are more sensitive to the threshold diameter for autoconversion of cloud ice to snow (D-cs) while simulated ice crystal mean size is more sensitive to ice nucleation parameterizations than to D-cs. Our results highlight the need for further improvements to the sub-grid RH variability and ice nucleation and growth in the model. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399406300001 |
WOS关键词 | TROPICAL TROPOPAUSE LAYER ; IN-SITU MEASUREMENTS ; CIRRUS CLOUDS ; CLIMATE SIMULATIONS ; WATER-VAPOR ; PART I ; SIZE DISTRIBUTIONS ; NUCLEATION ; PARAMETERIZATION ; AEROSOL |
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/22736 |
专题 | 地球科学 |
作者单位 | 1.Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA; 2.Chinese Acad Sci, Inst Atmospher Phys, Int Ctr Climate & Environm Sci, Beijing, Peoples R China; 3.San Jose State Univ, Dept Meteorol & Climate Sci, San Jose, CA 95192 USA; 4.Pacific Northwest Natl Lab, Richland, WA USA; 5.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 6.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Wu, Chenglai,Liu, Xiaohong,Diao, Minghui,et al. Direct comparisons of ice cloud macro- and microphysical properties simulated by the Community Atmosphere Model version 5 with HIPPO aircraft observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(7). |
APA | Wu, Chenglai.,Liu, Xiaohong.,Diao, Minghui.,Zhang, Kai.,Gettelman, Andrew.,...&Lin, Zhaohui.(2017).Direct comparisons of ice cloud macro- and microphysical properties simulated by the Community Atmosphere Model version 5 with HIPPO aircraft observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(7). |
MLA | Wu, Chenglai,et al."Direct comparisons of ice cloud macro- and microphysical properties simulated by the Community Atmosphere Model version 5 with HIPPO aircraft observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.7(2017). |
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