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Volumn 279, Issue 5348, 1998, Pages 211-213

Evidence for new sources of NO(x) in the lower atmosphere

Author keywords

[No Author keywords available]

Indexed keywords

NITRIC OXIDE; NITROGEN DIOXIDE;

EID: 0032498184     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.279.5348.211     Document Type: Article
Times cited : (27)

References (24)
  • 1
    • 6844261888 scopus 로고    scopus 로고
    • NASA Upper Atmosphere Research Program Report to Congress and the Environmental Protection Agency
    • J. A. Anderson, in Research Summaries 7994-7996 (NASA Upper Atmosphere Research Program Report to Congress and the Environmental Protection Agency, 1997), p. 100.
    • (1997) Research Summaries 7994-7996 , pp. 100
    • Anderson, J.A.1
  • 2
    • 6844221661 scopus 로고    scopus 로고
    • note
    • 2 was the principal gas released by the treated surface.
  • 3
    • 6844234194 scopus 로고    scopus 로고
    • note
    • x mixing ratio in the system was generally <10 parts per trillion by volume.
  • 4
    • 6844228526 scopus 로고    scopus 로고
    • note
    • 2 lamp was calibrated by Optronics with an absolute accuracy traceable to National Institute of Standards and Technology (NIST) of ±10%. A NIST-calibrated VUV photodiode was used to calibrate the vacuum monochromator and to measure the absolute VUV flux emitted by the argon flashlamp. This system was also used to monitor the ozone concentration during the photolysis experiment from λ = 250 nm absorption measurements.
  • 5
    • 6844259097 scopus 로고    scopus 로고
    • note
    • 2 filter in a direction perpendicular to the optical path in order to modify the transmission of the filter by splitting and shifting the rotational levels of the absorbing gas due to the Zeeman effect.
  • 7
    • 6844223057 scopus 로고    scopus 로고
    • note
    • 7 Hz by an electrometer that extended the effective dynamic range of the QMS an additional six orders of magnitude; single-ion detection was feasible.
  • 8
    • 6844247478 scopus 로고    scopus 로고
    • note
    • We used NIST SRM standards to calibrate the QMS system in accordance with the same comparative protocol widely adopted in gas chromatography. No detailed knowledge of the molecular, electron, or photon beam was required in this approach. However, careful control of the flow rate, pressure differentials, and other variables was essential to achieve a high precision in the cross-calibration and in the photolysis experiment.
  • 9
    • 6844228525 scopus 로고    scopus 로고
    • note
    • 3 in the Haber-Bosh process at very high gas pressures (200 to 600 atm) and temperatures (∼500°C). These conditions did not exist in this experiment.
  • 24
    • 6844263510 scopus 로고    scopus 로고
    • S.S.P. acknowledges the support of the National Science Foundation (ATM-9526510)
    • S.S.P. acknowledges the support of the National Science Foundation (ATM-9526510).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.