Study of CO2 advection in a forest
نویسنده
چکیده
Dependence of CO2 advection patterns on wind direction on a gentle forested slope B. Heinesch, M. Yernaux, and M. Aubinet Unité de Physique des Biosystèmes Faculté Universitaire des Sciences Agronomiques de Gembloux 8, avenue de la Faculté, 5030 Gembloux, Belgium Received: 19 October 2007 – Accepted: 30 October 2007 – Published: 14 November 2007 Correspondence to: B. Heinesch ([email protected])
منابع مشابه
Persistent wind‐induced enhancement of diffusive CO2 transport in a mountain forest snowpack
[1] Diffusion dominates the transport of trace gases between soil and the atmosphere. Pressure gradients induced by atmospheric flow and wind interacting with topographical features cause a small but persistent bulk flow of air within soil or snow. This forcing, called pressure pumping or wind pumping, leads to a poorly quantified enhancement of gas transport beyond the rate of molecular diffus...
متن کاملAnalysis of periods with strong and coherent CO2 advection over a forested hill
Horizontal and vertical advective fluxes of CO2 measured during the CarboEurope-IP advection experiment (ADVEX) at the Wetzstein spruce forest site in Thuringia, Germany, were related to wind direction, stratification regime and friction velocity u*. Measurements of wind speed and direction carried out at one of the slopes of the ridge revealed the existence of reverse flow below the canopy on ...
متن کاملتجزیه و تحلیل آتشسوزی جنگل با منشأ آبوهوایی با دادههای ماهوارهای در منطقهی البرز
Forest fire is one of the important problems in Iran which is caused by different factors such as human and natural factors. One of these factors is climate conditions that can be created by heat wave and special circulation of atmospheric phenomena. Occurrence of forest fire in north of Iran have different impacts on environment such as destruction of natural. According to the position of Iran...
متن کاملApplication of a mass consistent flow model to study the CO2 mass balance of forests
The reconstruction of the wind field is one of the main issues in the mass conservation approach for calculation of CO2 advection in forest ecosystems and still remains a challenging problem. In the current study, we present an advancement of this approach: the use of a mass consistent flow model (WINDS) which takes into account measured wind data and simulates the 3-D flow field, while imposin...
متن کاملتخمین ارزش اقتصاد غیررسمی در ایران برمبنای متغیّرهای زیستمحیطی، رهیافت فیلترکالمن
Informal economy i.e. unrecorded economy, is one of the important problems in developing countries which affects the efficiency of economic activities in formal sector. Informal economy is also an important source of air pollution. This paper aims at estimating informal economy in Iran over the period 1980-2009 based on the mount of CO2 emissions and the country forest areas and using Kalman ...
متن کامل