Physics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3602803s&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 2, CiteID L02803
Physics
26
Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Global Change: Atmosphere (0315, 0325), Global Change: Solar Variability (7537)
Scientific paper
Earlier studies have indicated that there is a secular increase in the occurrence frequency of polar mesospheric clouds (PMC), along with an anti-correlation with the solar activity. The combined data records from the Solar Backscatter Ultraviolet (SBUV and SBUV/2) instruments provide the longest satellite record (28 years) of the PMC frequency of occurrence. This record has been analyzed to determine the long-term variation in the PMC occurrence frequency in each of three latitude bands (54°-64°N, 64°-74°N, 74°-82°N). This analysis includes an adjustment for changes in the local time of measurement due to the satellite orbital drift, to take into account diurnal variations in the PMC frequency. Multiple linear regression fits using solar activity and time show that the occurrence frequency nearly doubles from solar maximum to solar minimum in all latitude bands. There is a long-term increase in the occurrence frequency ranging from 7% per decade at 64°-74°N to 20% per decade at 74°-82°N. These secular increases are significant at the 95% level for the 74°-82°N and all latitudes combined. We find a time lag of half a year (with an uncertainty of one year) between the minimum solar activity and the maximum PMC activity, consistent with our previous findings for PMC albedo.
DeLand Matthew T.
Olivero John J.
Shettle Eric P.
Thomas Gareth E.
No associations
LandOfFree
Long term variations in the frequency of polar mesospheric clouds in the Northern Hemisphere from SBUV 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 Long term variations in the frequency of polar mesospheric clouds in the Northern Hemisphere from SBUV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long term variations in the frequency of polar mesospheric clouds in the Northern Hemisphere from SBUV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1808994