A
A. Sogachev
Researcher at University of Helsinki
Publications - 15
Citations - 750
A. Sogachev is an academic researcher from University of Helsinki. The author has contributed to research in topics: Flux footprint & Eddy covariance. The author has an hindex of 9, co-authored 15 publications receiving 690 citations. Previous affiliations of A. Sogachev include Technical University of Denmark.
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Flux and Concentration Footprint Modelling: State of the Art
Timo Vesala,Natascha Kljun,Üllar Rannik,Janne Rinne,A. Sogachev,Tiina Markkanen,Tiina Markkanen,Karl Sabelfeld,Thomas Foken,Monique Y. Leclerc +9 more
TL;DR: There has recently been a trend emerging in modelling the behavior of the footprint functions using a less idealized, more realistic description of inhomogeneities, vegetation structure and topography, ultimately for reactive compounds.
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Modification of Two-Equation Models to Account for Plant Drag
A. Sogachev,Oleg Panferov +1 more
TL;DR: In this article, a modification of the most popular two-equation (E-φ) models, taking into account the plant drag, is proposed, where the model constants estimated experimentally for free-air flow do not allow for adequate reconstruction of the ratio between the production and dissipation rates of TKE in the vegetation canopy and have to be adjusted.
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Eddy covariance measurements of carbon exchange and latent and sensible heat fluxes over a boreal lake for a full open‐water period
Timo Vesala,Jussi Huotari,Üllar Rannik,Tanja Suni,Sampo Smolander,A. Sogachev,Samuli Launiainen,Anne Ojala +7 more
TL;DR: In this paper, the authors applied the statistical criteria for CO2 concentration and vertical wind speed, averaging over a 5min period and selecting only the wind direction with longest fetch, to obtain lake-representative CO2 fluxes.
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Application of a three-dimensional model for assessing effects of small clear-cuttings on radiation and soil temperature
TL;DR: In this article, a three-dimensional model Mixfor-3D of soil-vegetation-atmosphere transfer (SVAT) was developed and applied to estimate possible effects of tree clear-cutting on radiation and soil temperature regimes of a forest ecosystem.
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Flux footprints over complex terrain covered by heterogeneous forest
TL;DR: In this article, an innovative model was developed for the planetary boundary layer flow and scalar transport and was applied to a forested surface with varying topography, showing that the flux contribution and footprint functions depend on the location of the flux measurement point and may significantly deviate from those for a flat terrain.