Zobrazeno 1 - 10
of 133
pro vyhledávání: '"H. I. Schiff"'
Autor:
H. I. Schiff
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 71:670-681
The detailed mechanisms for excitation of all the night glow emissions remain very much in doubt. The green atomic oxygen line appears to be excited by a modification of the Chapman mechanism, although recent laboratory studies still show some incons
Autor:
E. L. Atlas, Kenneth Mopper, Teresa Campos, B. McCully, Xin Chen, H. I. Schiff, Xianliang Zhou, D. R. Karecki, Y.-N. Lee, Gervase I. Mackay, Brian G. Heikes
Publikováno v:
Journal of Geophysical Research: Atmospheres. 101:14741-14755
Five methods for the measurement of CH2O vapor were compared under remote tropospheric conditions. The techniques included an aqueous-scrubber enzyme fluorescence method (URIcoil), TDLAS (UNI), 2,4-dinitrophenylhydrazine (DNPH) impregnated-cartridges
Autor:
Octavio T. Meld, Laurier Poissant, P.B. Roussel, Paul B. Shepson, H. Niki, Neville W. Reid, W. Moroz, John W. Drummond, Gervase I. Mackay, D.R. Hastie, H. I. Schiff
Publikováno v:
Atmospheric Environment. 30:2125-2132
The southern Ontario oxidant study (SONTOS) is one of the scientific responses to the problem of ozone exceedences in the Windsor/Quebec City corridor, the strip extending from Windsor in the extreme southwest of Ontario, along the north shores of La
Publikováno v:
Research on Chemical Intermediates. 20:525-556
We have attempted to describe how tunable diode laser absorption spectroscopy can be applied to measurements of clean and polluted air. Pb salt diodes emit in the infrared region where most gases of atmospheric interest have their strong absorptions,
Autor:
H. I. Schiff
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 96:296-306
Spectroscopic methods afford a number of advantages for making atmospheric measurements. It is a passive technique which is capable of making real time, in situ measurements. Since each molecules has a characteristic spectrum it is possible to make s
Publikováno v:
Journal of Atmospheric Chemistry. 13:97-108
A high resolution tunable diode laser absorption spectrometer (TDLAS) was used to measure the broadening effect of water vapor and other gases (dry air, nitrogen, oxygen, hydrogen and helium) on three methane lines in the v4 fundamental. The effects
Publikováno v:
Journal of Geophysical Research: Atmospheres. 95:10147-10153
The advantages of tunable-diode-laser absorption spectrometry (TDLAS) for measuring trace atmospheric gases are universality, positive identification, good sensitivity, and rapid response time. A TDLAS system is described which is capable of making m
Autor:
S. E. Van Bramer, R. M. Marinaro, Gerald L. Gregory, J. M. Hoell, B. J. Huebert, D. R. Karecki, D.R. Hastie, S. A. Vay, H. I. Schiff, Gervase I. Mackay, P. J. Lebel
Publikováno v:
Journal of Geophysical Research: Atmospheres. 95:10089-10102
Results are reported on the performance of (1) denuder-tube/chemiluminescent, (2) nylon-filter/ion-chromatography, and (3) tunable-diode-laser/multipath-absorption HNO3 measurement instruments during the NASA Global Tropospheric Experiment Chemical I
Autor:
G. W. Harris, J. M. Hoell, A. L. Torres, Scott T. Sandholm, M. A. Carroll, H. I. Schiff, D. R. Karecki, Douglas D. Davis, Alan Fried, Brian A. Ridley, Michael O. Rodgers, Gervase I. Mackay, Donald R. Hastie, John D. Bradshaw, Gerald L. Gregory
Publikováno v:
Journal of Geophysical Research: Atmospheres. 95:10103-10127
Results on NO2 instruments are reported from the NASA Global Tropospheric Experiment Chemical Instrumentation Test and Evaluation 2 (CITE 2) program in summer 1986. The instruments tested were (1) a two-photon LIF system using a laser for NO2-NO phot