Publications by authors named "Max Loewenstein"
Article Synopsis
- The study investigates methods to improve the accuracy of measuring greenhouse gas emissions from specific local sources through airborne observations.
- Major uncertainties in previous measurements are addressed by changing flight paths, refining covariance and anisotropy modeling, and enhancing interpolation techniques.
- The new cylindrical flight profile is demonstrated to be advantageous and is applied to quantify methane emissions from an oil field in California, offering a comparison to existing bottom-up estimates.
Dilute mixtures of n-butanal, 3-methylbutanal, and 3,3-dimethylbutanal in synthetic air, different N(2)/O(2) mixtures, and pure nitrogen (up to 100 ppm) were photolyzed with fluorescent UV lamps (275-380 nm) at 298 K. The main photooxidation products were ethene (n-butanal), propene (3-methylbutanal) or i-butene (3,3-dimethylbutanal), CO, vinylalcohol, and ethanal. The photolysis rates and the absolute quantum yields were found to be dependent on the total pressure of synthetic air but not of nitrogen.
View Article and Find Full Text PDFArgus: a new instrument for the measurement of the stratospheric dynamical tracers, N2O and CH4.
Spectrochim Acta A Mol Biomol Spectrosc
September 2002
We describe here a new instrument for the simultaneous, in situ measurement of the stratospheric tracer molecules, nitrous oxide (N2O) and methane (CH4). Argus is unique in its small size making it well suited for limited payload atmospheric research platforms. Argus employs second harmonic spectroscopy using tunable lead-salt diode lasers emitting in the mid-infrared.
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