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Costas G. Helmis
Researcher at National and Kapodistrian University of Athens
Publications - 101
Citations - 2545
Costas G. Helmis is an academic researcher from National and Kapodistrian University of Athens. The author has contributed to research in topics: Planetary boundary layer & Wind speed. The author has an hindex of 26, co-authored 101 publications receiving 2399 citations.
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Sea-breeze circulation and photochemical pollution in Athens, Greece
TL;DR: In this article, the effect of the sea-breeze on photochemical pollution in Athens, Greece is analyzed. But the authors focus on two typical days in August 1981 with well-defined sea breeze circulation and conclude that no day-to-day pollution accumulation is noticed.
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The Coupled Boundary Layers and Air–Sea Transfer Experiment in Low Winds
James B. Edson,Timothy L. Crawford,Jerry Crescenti,Tom Farrar,Nelson M. Frew,Greg Gerbi,Costas G. Helmis,Tihomir Hristov,Djamal Khelif,Andrew T. Jessup,Haf Jonsson,Ming Li,Larry Mahrt,Wade R. McGillis,Albert J. Plueddemann,Lian Shen,Eric D. Skyllingstad,Timothy P. Stanton,Peter P. Sullivan,Jielun Sun,John H. Trowbridge,Dean Vickers,Shouping Wang,Qing Wang,Robert A. Weller,John Wilkin,Albert J. Williams,Dick K. P. Yue,Christopher J. Zappa +28 more
TL;DR: The Coupled Boundary Layers and Air-Sea Transfer (CBLAST) program is being conducted to investigate the processes that couple the marine boundary layers and govern the exchange of heat, mass, and momentum across the air-sea interface.
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Application of Neural Networks to the Simulation of the Heat Island over Athens, Greece, Using Synoptic Types as a Predictor
TL;DR: In this paper, the effect of synoptic-scale atmospheric circulation on the urban heat island phenomenon over Athens, Greece, was investigated and quantified for a period of two years, employing a neural network approach.
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A field study of the wake behind a 2 MW wind turbine
TL;DR: In this paper, the wake behind a 2 MW wind turbine situated on flat country at Nasudden, Sweden has been mapped in a field experiment where several measuring techniques were employed, and detailed data on the turbulence structure in the wake have been obtained.
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Gas-particle concentration and characterization of sources of PAHs in the atmosphere of a suburban area in Athens, Greece
TL;DR: Atmospheric polycyclic aromatic hydrocarbons (PAH) were determined in two places in a suburban area of Athens greater area during June and November 2003 and the most abundant members were phenanthrene, anthracene, fluorene, fluoranthene and pyrene.