Searching chaos and coherent structures in the atmospheric turbulence above the Amazon forest

被引：26

作者：

Campanharo, A. S. L. O. ^{[1
]}

Ramos, F. M. ^{[1
]}

Macau, E. E. N. ^{[1
]}

Rosa, R. R. ^{[1
]}

Bolzan, M. J. A. ^{[2
]}

Sa, L. D. A. ^{[3
]}

机构：

[1] Inst Nacl Pesquisas Espaciais, BR-12227010 Sao Paulo, Brazil

[2] UNIVAP, BR-12224000 Sao Paulo, Brazil

[3] Museu Paraense Emilio Goeldi, BR-66077530 Belem, Para, Brazil

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2008年 / 366卷 / 1865期

关键词：

atmospheric turbulence; coherent structures; deterministic chaos; correlation dimension; Lyapunov exponent;

D O I：

10.1098/rsta.2007.2118

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this work, the possible chaotic nature of the atmospheric turbulence above a densely forested area in the Amazon region is investigated. To this end, we use high- resolution temperature data obtained during a micrometeorological measurement campaign in the Brazilian Amazonia. Estimates of the correlation dimension (D-2=3.50 +/- 0.05) and of the largest Lyapunov exponent (lambda(1)=0.050 +/- 0.002) suggest the existence of chaos in the atmospheric boundary layer. Our findings indicate that this low- dimensional chaotic dynamics is associated with the presence of the coherent structures within the boundary layer right above the canopy top and not with the atmospheric turbulence per se, as previously claimed.

引用

页码：579 / 589

页数：11

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