Self-organized criticality in cumulus clouds

被引：8
|
作者：
Najafi, M. N. [1 ,2 ]
Cheraghalizadeh, J. [1 ]
Herrmann, H. J. [3 ]
机构：
[1] Univ Mohaghegh Ardabili, Dept Phys, POB 179, Ardebil, Iran
[2] Swiss Fed Inst Technol, IfB, Computat Phys, Stefano Franscini Pl 3, CH-8093 Zurich, Switzerland
[3] CNRS, UMR 7636, ESPCI, Lab PMMH, F-75005 Paris, France
来源：
PHYSICAL REVIEW E | 2021年 / 103卷 / 05期
关键词：
ABELIAN SANDPILE; RAIN; SATELLITE; SHAPE; MULTIFRACTALS; DISTRIBUTIONS; DIMENSIONS; INVARIANCE; DIFFUSION; DYNAMICS;
D O I：
10.1103/PhysRevE.103.052106
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The shape of clouds has proven to be essential for classifying them. Our analysis of images from fair weather cumulus clouds reveals that, in addition to turbulence, they are driven by self-organized criticality. Our observations yield exponents that support the fact the clouds, when projected to two dimensions, exhibit conformal symmetry compatible with c = -2 conformal field theory. By using a combination of the Navier-Stokes equation, diffusion equations, and a coupled map lattice, we successfully simulated cloud formation, and obtained the same exponents.
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页数：12
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