Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa53a..01b&link_type=abstract
American Geophysical Union, Spring Meeting 2007, abstract #SA53A-01
Other
0310 Airglow And Aurora, 1694 Instruments And Techniques, 3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513)
Scientific paper
Spectral calibrations, airglow and possibly auroral contaminations, solar and telluric absorption features and the selection of transition probabilities can all influence rotational temperatures derived from measurements of hydroxyl airglow intensities. Consideration and examples are given of these influences. Measurements and analyses are outlined for data checking that should be undertaken if a hydroxyl airglow data set is to be used to determine climate trends. Multiple spectral calibrations should be conducted throughout the observing period, with regular inter- comparisons to other calibration sources also required. Uncertainties in spectral calibrations should be expressed as a temperature equivalent. Sufficient spectral scans at maximum resolution should be obtained under all extreme observing conditions (at the lowest solar depression angle operated both morning and night, moon and cloud both separately and combined, aurora and under conditions of enhanced atomic oxygen airglow, and under clear sky conditions but with high atmospheric water vapour content) so that an uncertainty for the derived rotational temperatures can be determined for the established data selection criteria. Once the varying emission and absorption features for the hydroxyl region of interest at your site are understood for the observing site, then the spectral resolution of the observing instrument can be reduced to increase temporal resolution with reasonable confidence. This confidence should be tested by investigating the average rotational temperatures derived from all possible line intensity ratios under the extreme observing conditions noted. If a spectral-fitting rotational temperature determination is used, the residuals from the fit should be summed and similarly examined. Hydroxyl measurements provide a cost effective means of monitoring the temperature of the climate-sensitive mesopause region on an almost nightly basis. If care is taken, they provide a valuable data set for investigating climate change.
Burns G.
French James
No associations
LandOfFree
Important Considerations When Using Hydroxyl Airglow Measurements to Determine Climate Trends of the Mesopause Region. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Important Considerations When Using Hydroxyl Airglow Measurements to Determine Climate Trends of the Mesopause Region., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Important Considerations When Using Hydroxyl Airglow Measurements to Determine Climate Trends of the Mesopause Region. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1037058