Surface soil moisture content is highly variable in both space and time. Remote sensing can provide an effective methodology for mapping surface moisture content over large areas but ground based measurements are required to test its reliability and to calibrate retrieval algorithms. Recently, we had the opportunity to design and perform an experiment aimed at jointly acquiring measurements of ...

The aminolysis of a novel activated ester resin was utilized for kinetic study via continuous in situ fluorescence measurements. A variety of resin compositions (polystyrene, JandaJel, ArgoPore, TentaGel, NovaGel, and PEGA) and solvents (dimethylformamide, acetonitrile, tetrahydrofuran, 1,2-dichlorethane, and toluene) were tested to compare their effects on the reaction rate. A linear relations...

This paper describes a broadband cavity ringdown spectrometer and its deployment during the 2002 North Atlantic Marine Boundary Layer Experiment (NAMBLEX) to measure ambient concentrations of NO 3 , N 2 O 5 , I 2 and OIO at the Mace Head Atmospheric Research Station, Co. Galway, Ireland. The effective absorption path lengths 5 accessible with the spectrometer generally exceeded 10 km, enabling ...

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[1] The Aura Validation Experiment (AVE) focuses on validating Aura satellite measurements of important atmospheric trace gases using ground-based, aircraft, and balloon-borne instruments. Global satellite observations of CO from the Tropospheric Emission Spectrometer (TES) on the EOS Aura satellite have been ongoing since September 2004. This paper discusses CO validation experiments during th...

Technology in the hearing aid industry is ever changing. One of the many features that may improve accuracy of hearing aid fi ttings and patients ’ satisfaction is the inception of in-situ audiometry, which allows the clinician to measure hearing thresholds with a hearing aid in the patient ’ s ear. Objective : The present study aimed to investigate the validity of in-situ audiometry measured w...

This discussion paper is/has been under review for the journal Atmospheric Measurement Techniques (AMT). Please refer to the corresponding final paper in AMT if available. Abstract In this paper we report vertical profiles of CO 2 measured with a cavity ring-down spectrometer (CRDS, Picarro, Inc., 2301-m) on a research aircraft from near ground level to 8 km above mean sea level (a.m.s.l.). The...

G. Durry, N. Huret, A. Hauchecorne, V. Marecal, J.-P. Pommereau, R. L. Jones, G. Held, N. Larsen, and J.-B. Renard Service d’Aéronomie, CNRS and Institut Pierre Simon Laplace, Route des Gatines, Verrière le Buisson cedex, 91371, France Groupe de Spectroscopie Moléculaire et Atmosphérique, CNRS and Université de Reims, Moulin de la Housse, B.P. 1039, 51687 Reims Cedex, France Laboratoire de Phys...

Monte Carlo simulations are used to establish a weighting function that describes the collection of angular scattering for the WETLabs AC-9 reflecting tube absorption meter. The equivalent weighting function for the AC-9 attenuation sensor is found to be well approximated by a binary step function with photons scattered between zero and the collection half-width angle contributing to the scatte...

Mammalian cells dominate the biopharmaceutical industry and maintaining cell viability is a limiting factor in most mammalian cell cultures. This project is focused on developing an online (in-situ) dielectric spectroscopy sensor that is capable of measuring cell viability in real-time to enable optimization of culture conditions for Chinese Hamster Ovary (CHO) cell lines in micro-bioreactors.