Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-13115-2018 |
Simulated and observed horizontal inhomogeneities of optical thickness of Arctic stratus | |
Schaefer, Michael1; Loewe, Katharina2; Ehrlich, Andre1; Hoose, Corinna2; Wendisch, Manfred1 | |
2018-09-12 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
![]() |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:17页码:13115-13133 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Two-dimensional horizontal fields of cloud optical thickness r derived from airborne measurements of solar spectral, cloud-reflected radiance are compared with semi-idealized large eddy simulations (LES s) of Arctic stratus performed with the Consortium for Small-scale Modeling (COSMO) atmospheric model. The measurements were collected during the Vertical Distribution of Ice in Arctic Clouds (VERDI) campaign carried out in Inuvik, Canada, in April/May 2012. The input for the LESs is obtained from collocated airborne dropsonde observations of a persistent Arctic stratus above the sea-ice-free Beaufort Sea. Simulations are performed for spatial resolutions of 50 m (1.6 km x 1.6 km domain) and 100 m (6.4 km x 6.4 km domain). Macrophysical cloud properties, such as cloud top altitude and vertical extent, are well captured by the COSMO simulations. However, COSMO produces rather homogeneous clouds compared to the measurements, in particular for the simulations with coarser spatial resolution. For both spatial resolutions, the directional structure of the cloud inhomogeneity is well represented by the model. Differences between the individual cases are mainly associated with the wind shear near cloud top and the vertical structure of the atmospheric boundary layer. A sensitivity study changing the wind velocity in COSMO by a vertically constant scaling factor shows that the directional, small-scale cloud inhomogeneity structures can range from 250 to 800 m, depending on the mean wind speed, if the simulated domain is large enough to capture also large-scale structures, which then influence the small-scale structures. For those cases, a threshold wind velocity is identified, which determines when the cloud inhomogeneity stops increasing with increasing wind velocity. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000444458800002 |
WOS关键词 | BOUNDARY-LAYER CLOUDS ; MIXED-PHASE CLOUDS ; RESOLUTION ; RETRIEVAL ; SURFACE ; SENSITIVITY ; CLIMATE ; MODELS ; ALBEDO ; OCEAN |
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/29525 |
专题 | 地球科学 |
作者单位 | 1.Univ Leipzig, Leipzig Inst Meteorol, Leipzig, Germany; 2.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Karlsruhe, Germany |
推荐引用方式 GB/T 7714 | Schaefer, Michael,Loewe, Katharina,Ehrlich, Andre,et al. Simulated and observed horizontal inhomogeneities of optical thickness of Arctic stratus[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(17):13115-13133. |
APA | Schaefer, Michael,Loewe, Katharina,Ehrlich, Andre,Hoose, Corinna,&Wendisch, Manfred.(2018).Simulated and observed horizontal inhomogeneities of optical thickness of Arctic stratus.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(17),13115-13133. |
MLA | Schaefer, Michael,et al."Simulated and observed horizontal inhomogeneities of optical thickness of Arctic stratus".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.17(2018):13115-13133. |
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