LOAC measurements in a volcano
نویسنده
چکیده
The small size and mass of the LOAC instrument, as well as its wide detection range for the particle size distribution and potential to distinguish particle nature makes it a highly attractive instrument for volcanology applications. Measurements of the volcanic aerosol emission are challenging due to the difficult-to-access terrain, and can be hazardous during eruptions. The lightweight LOAC offers both possibility for ground-based deployment at the volcano summit, and balloon-based launches through the volcano plume to quantify the aerosol emission. There is strong interest to measure volcanic aerosol sources due to their impacts on climate and atmospheric chemistry, and on air quality and health.
منابع مشابه
Interactive comment on “LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles – Part 2: First results from balloon and unmanned aerial vehicle flights” by J.-B. Renard et al
It is no true that we have copied/pasted parts of the paper 1. A careful reading of the two texts show that no more than few tens of lines are partly in common, and they concern only the description of the instrument and some conditions of measurements. Also, it is not true that they are repetitions that occupy about 1/3 of the paper. All the photographs are necessary to show the LOAC gondolas....
متن کاملReply to referee 2 for the second part of the LOAC paper
Overall this is a clearly presented paper describing a range of initial results provided by a newly developed instrument, LOAC, designed to measure aerosol size and type, which has great potential to provide novel results. The paper achieves the goal of describing a range of new measurements, though some of the measurements, specifically the aerosol speciation index, need to be more clearly exp...
متن کاملReferee report LOAC: a small aerosol optical counter/sizer for ground- based and balloon measurements of the size distribution and nature of atmospheric particles: 1. Principle of measurements and instrument evaluation
L. 4-5 p.9995: To be precise, in [Deshler et al., 2003, cited in the paper], the authors mention the value of 150 nm as smallest particle size measured by optical particle counters (OPC) at Laramie. However, these authors also measure condensation nuclei (radius ≤ 0.01 μm) by growing particle with sizes down to 0.01 μm in the sample stream. L. 5-6 p.9995: “sensitive to nature of the particl...
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متن کاملInteractive comment on “LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles – Part 1: Principle of measurements and instrument evaluation” by J.-B. Renard et al
Page 9998 line 20: Indeed, we will change “typology” to “topology”. The scattering properties of particles depend on the size, on their shape and on the real and imaginary parts of their refractive index. Many laboratory studies (e.g. the Amsterdam and Granada light scattering databases, the PROGRA2 database) have shown that the imaginary part of the index, and thus the transparency of particle...
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