Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD030228 |
Effects of Particle Nonsphericity on Dust Optical Properties in a Forecast System: Implications for Model-Observation Comparison | |
Hoshyaripour, G. A.1; Bachmann, V2; Foerstner, J.2; Steiner, A.2; Vogel, H.1; Wagner, F.1; Walter, C.1; Vogel, B.1 | |
2019-07-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:13页码:7164-7178 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Mineral dust is a key player in the Earth system that affects the weather and climate through absorbing and scattering the radiation. Such effects strongly depend on the optical properties of the particles that are in turn affected by the particle shape. For simplicity, dust particles are usually assumed to be spherical. But this assumption can lead to large errors in modeling and remote sensing applications. This study investigates the impact of dust particle shape on its direct radiative effect in a next-generation atmospheric modeling system ICON-ART (ICOsahedral Nonhydrostatic weather and climate model with Aerosols and Reactive Trace gases) to verify if accounting for nonsphericity enhances the model-observation agreement. Two sets of numerical experiments are conducted by changing the optical shape of the particles: one assuming spherical particles and the other one assuming a mixture of 35 randomly oriented triaxial ellipsoids. The simulations are compared to MISR (Multiangle Imaging Spectroradiometer), AERONET (Aerosol Robotic Network), and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) observations (with focus on North Africa). The results show that consideration of particle nonsphericity increases the dust AOD (Aerosol Optical Depth) at 550nm by up to 28% and leads to slight enhancement of the agreement between modeled and measured AOD. However, the model performance varies significantly when focusing on specific regions in North Africa. These differences stem from the uncertainties associated with particle size distribution and emission mechanisms in the model configuration. Regarding the attenuated backscatter, the simulated profile assuming nonsphericity differs by a factor of 2 to 5 from the experiment assuming spherical dust and is in a better agreement with the CALIPSO observations. |
英文关键词 | mineral dust optical depth attenuated backscatter |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477580200030 |
WOS关键词 | SAHARAN-MINERAL-DUST ; LIGHT-SCATTERING ; RADIATIVE-TRANSFER ; REFRACTIVE-INDEX ; SIZE ; AEROSOLS ; IMPACT ; SENSITIVITY ; FLUXES ; SHAPE |
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/185140 |
专题 | 气候变化 |
作者单位 | 1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Karlsruhe, Germany; 2.Deutsch Wetterdienst DWD, Offenbach, Germany |
推荐引用方式 GB/T 7714 | Hoshyaripour, G. A.,Bachmann, V,Foerstner, J.,et al. Effects of Particle Nonsphericity on Dust Optical Properties in a Forecast System: Implications for Model-Observation Comparison[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(13):7164-7178. |
APA | Hoshyaripour, G. A..,Bachmann, V.,Foerstner, J..,Steiner, A..,Vogel, H..,...&Vogel, B..(2019).Effects of Particle Nonsphericity on Dust Optical Properties in a Forecast System: Implications for Model-Observation Comparison.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(13),7164-7178. |
MLA | Hoshyaripour, G. A.,et al."Effects of Particle Nonsphericity on Dust Optical Properties in a Forecast System: Implications for Model-Observation Comparison".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.13(2019):7164-7178. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论