Effects of Vegetation and Topography on the Boundary Layer Structure above the Amazon Forest

Author:

Chamecki Marcelo1ORCID,Freire Livia S.2,Dias Nelson L.3,Chen Bicheng1,Dias-Junior Cléo Quaresma4,Toledo Machado Luiz Augusto56,Sörgel Matthias6,Tsokankunku Anywhere6,Araújo Alessandro C. de7

Affiliation:

1. a Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, California

2. b Institute of Mathematics and Computer Sciences, University of São Paulo, São Carlos, Brazil

3. c Department of Environmental Engineering, Federal University of Paraná (UFPR), Curitiba, Brazil

4. d Department of Physics, Federal Institute of Pará (IFPA), Belém, Brazil

5. e Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, Brazil

6. f Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

7. g Empresa Brasileira de Pesquisa Agropecuária, Belém, Brazil

Abstract

AbstractObservational data from two field campaigns in the Amazon forest were used to study the vertical structure of turbulence above the forest. The analysis was performed using the reduced turbulent kinetic energy (TKE) budget and its associated two-dimensional phase space. Results revealed the existence of two regions within the roughness sublayer in which the TKE budget cannot be explained by the canonical flat-terrain TKE budgets in the canopy roughness sublayer or in the lower portion of the convective ABL. Data analysis also suggested that deviations from horizontal homogeneity have a large contribution to the TKE budget. Results from LES of a model canopy over idealized topography presented similar features, leading to the conclusion that flow distortions caused by topography are responsible for the observed features in the TKE budget. These results support the conclusion that the boundary layer above the Amazon forest is strongly impacted by the gentle topography underneath.

Funder

Directorate for Geosciences

CNPq

FAPESP

Publisher

American Meteorological Society

Subject

Atmospheric Science

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3