Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1706495114 |
Network approach to patterns in stratocumulus clouds | |
Glassmeier, Franziska1,2; Feingold, Graham2 | |
2017-10-03 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:40页码:10578-10583 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Stratocumulus clouds (Sc) have a significant impact on the amount of sunlight reflected back to space, with important implications for Earth's climate. Representing Sc and their radiative impact is one of the largest challenges for global climate models. Sc fields self-organize into cellular patterns and thus lend themselves to analysis and quantification in terms of natural cellular networks. Based on large-eddy simulations of Sc fields, we present a first analysis of the geometric structure and self-organization of Sc patterns from this network perspective. Our network analysis shows that the Sc pattern is scale-invariant as a consequence of entropy maximization that is known as Lewis's Law (scaling parameter: 0.16) and is largely independent of the Sc regime (cloud-free vs. cloudy cell centers). Cells are, on average, hexagonal with a neighbor number variance of about 2, and larger cells tend to be surrounded by smaller cells, as described by an Aboav-Weaire parameter of 0.9. The network structure is neither completely random nor characteristic of natural convection. Instead, it emerges from Sc-specific versions of cell division and cell merging that are shaped by cell expansion. This is shown with a heuristic model of network dynamics that incorporates our physical understanding of cloud processes. |
英文关键词 | clouds climate convection self-organization network |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412130500046 |
WOS关键词 | TOPOLOGICAL CORRELATIONS ; CELLS ; AEROSOL ; MODEL ; PRECIPITATION ; ORGANIZATION ; ARRANGEMENT ; EPIDERMIS ; SHAPES ; SIZES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/204798 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.CNR, Washington, DC 20001 USA; 2.Natl Ocean & Atmospher Adm, Chem Sci Div, Earth Syst Res Lab, Boulder, CO 80305 USA |
推荐引用方式 GB/T 7714 | Glassmeier, Franziska,Feingold, Graham. Network approach to patterns in stratocumulus clouds[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(40):10578-10583. |
APA | Glassmeier, Franziska,&Feingold, Graham.(2017).Network approach to patterns in stratocumulus clouds.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(40),10578-10583. |
MLA | Glassmeier, Franziska,et al."Network approach to patterns in stratocumulus clouds".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.40(2017):10578-10583. |
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