Ultrafine particle number fluxes over and in a deciduous forest
نویسندگان
چکیده
منابع مشابه
Seasonal and interannual variability of energy fluxes over a broadleaved temperate deciduous forest in North America
The components of the surface energy balance were measured for 3 years over a broadleaved deciduous forest using the eddy covariance technique. Within years, the magnitude and distribution of fluxes was controlled by seasonal changes in solar radiation, drought, as well as leaf emergence and senescence. Evapotranspiration increased by a factor greater than five (from about 0.5 to 3 mm day−1) af...
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The Atmosphere–Land Exchange Surface Energy (ALEX) balance model is an analytical formulation of the energy and mass transport within the soil and the vegetation canopy used for simulating energy, evapotranspiration, and CO2 fluxes in a wide range of vegetation environments. The objective of this study was to evaluate the ability of ALEX to simulate the effect of soil-surface leaf litter residu...
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Summertime nitric acid concentrations over a deciduous forest in the midwestern United States are reported, which range between 0.36 and 3.3 mgm . Fluxes to the forest are computed using the relaxed eddy accumulation technique and gradient methods. In accord with previous studies, the results indicate substantial uncertainties in the gradientbased calculations. The relaxed eddy accumulation (RE...
متن کاملThe Spatial Variability of Energy and Carbon Dioxide Fluxes at the Floor of a Deciduous Forest
Fluxes of carbon dioxide, water and sensible heat were measured using three different eddy covariance systems above the forest floor of a closed deciduous forest (leaf area index ≈ 6). The primary objective was to examine the representativeness of a single eddy covariance system in estimating soil respiration for time scales ranging from one-half hour to more than one week. Experiments were con...
متن کاملTime-averaging of ultrafine particle number size spectra
On the time-averaging of ultrafine particle number size spectra in vehicular plumes X. Yao, N. T. Lau, M. Fang, and C. K. Chan Institute for the Environment, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, PRC Department of Chemical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, PRC Received: 17 May 2006 – Accepted: 14 July 2...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2017
ISSN: 2169-897X,2169-8996
DOI: 10.1002/2016jd025854