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| DOI | 10.5194/acp-23-2789-2023 |
| Evaluation of aerosol-cloud interactions in E3SM using a Lagrangian framework | |
| Christensen, Matthew W.; Ma, Po-Lun; Wu, Peng; Varble, Adam C.; Muelmenstaedt, Johannes; Fast, Jerome D. | |
| 发表日期 | 2023 |
| ISSN | 1680-7316 |
| EISSN | 1680-7324 |
| 起始页码 | 2789 |
| 结束页码 | 2812 |
| 卷号 | 23期号:4页码:24 |
| 英文摘要 | A Lagrangian framework is used to evaluate aerosol-cloud interactions in the U.S. Department of Energy's Energy Exascale Earth System Model (E3SM) version 1 (E3SMv1) for measurements taken at Graciosa Island in the Azores where a U.S. Department of Energy Atmosphere Radiation Measurement (ARM) site is located. This framework uses direct measurements of cloud condensation nuclei (CCN) concentration (instead of relying on satellite retrievals of aerosol optical depth) and incorporates a suite of ground-based ARM measurements, satellite retrievals, and meteorological reanalysis products that when applied to over a 1500 trajectories provides key insights into the evolution of low-level clouds and aerosol radiative forcing that is not feasible from a traditional Eulerian analysis framework. Significantly lower concentrations (40 %) of surface CCN concentration are measured when precipitation rates in 48 h back trajectories average above 1.2 mm d-1 in the Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (IMERG) product. The depletion of CCN concentration when precipitation rates are elevated is nearly twice as large in the ARM observations compared to E3SMv1 simulations. The model CCN concentration bias remains significant despite modifying the autoconversion and accretion rates in warm clouds. As the clouds in trajectories associated with larger surface-based CCN concentration advect away from Graciosa Island, they maintain higher values of droplet number concentrations (Nd) over multiple days in observations and E3SM simulations compared to trajectories that start with lower CCN concentrations. The response remains robust even after controlling for meteorological factors such as lower troposphere stability, the degree of cloud coupling with the surface, and island wake effects. E3SMv1 simulates a multi-day aerosol effect on clouds and a Twomey radiative effect that is within 30 % of the ARM and satellite observations. However, the mean cloud droplet concentration is more than 2-3 times larger than in the observations. While Twomey radiative effects are similar amongst autoconversion and accretion sensitivity experiments, the liquid water path and cloud fraction adjustments are positive when using a regression model as opposed to negative when using the present-day minus pre-industrial aerosol emissions approach. This result suggests that tuning the autoconversion and accretion alone is unlikely to produce the desired aerosol susceptibilities in E3SMv1. |
| 学科领域 | Environmental Sciences; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000942233900001 |
| 来源期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/273693 |
| 作者单位 | United States Department of Energy (DOE); Pacific Northwest National Laboratory |
| 推荐引用方式 GB/T 7714 | Christensen, Matthew W.,Ma, Po-Lun,Wu, Peng,et al. Evaluation of aerosol-cloud interactions in E3SM using a Lagrangian framework[J],2023,23(4):24. |
| APA | Christensen, Matthew W.,Ma, Po-Lun,Wu, Peng,Varble, Adam C.,Muelmenstaedt, Johannes,&Fast, Jerome D..(2023).Evaluation of aerosol-cloud interactions in E3SM using a Lagrangian framework.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(4),24. |
| MLA | Christensen, Matthew W.,et al."Evaluation of aerosol-cloud interactions in E3SM using a Lagrangian framework".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.4(2023):24. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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