Showing papers by "André S. H. Prévôt published in 2000"
TL;DR: The diurnal cycle of VOCs, influenced by the various meteorological features characteristic for deep Alpine valleys, is discussed in detail in this article, where the average VOC concentration was 40% lower in the nocturnal surface layer than in cases of southerly advection.
55 citations
TL;DR: The Mesolcina valley campaign was an important part of the VOTALP project as discussed by the authors, where ground-based and airborne instruments were deployed to obtain a four-dimensional chemical and physical picture of the valley atmosphere and the surroundings.
53 citations
TL;DR: In this paper, a set of five improved scintillometers were used in an experiment over complex terrain, which represents a unique opportunity for evaluating scintilometer performance by comparing their results to sodar, aircraft, and ground station measurements.
Abstract: Several large-aperture scintillometers were built at the Paul Scherrer Institute with the aim to measure wind over complex terrain. A prototype instrument was tested over flat ground, and the performance of six analyzing techniques was evaluated by comparing them with conventional anemometers. Next, a set of five improved scintillometers was used in an experiment over complex terrain. This experiment represents a unique opportunity for evaluating scintillometer performance by comparing their results to sodar, aircraft, and ground station measurements. The results complement and partly contradict the observations previously published; the so-called peak technique is the most reliable and frequency techniques fail to provide faithful results in many cases. The measurements demonstrate that scintillometry is useful and reliable for wind and turbulence measurements over complex terrain.
39 citations
TL;DR: In this article, a motor-glider was used to measure the concentrations of anthropogenic VOCs in Mesolcina valley and above the crests of the Alps.
39 citations