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Extending the SBUV PMC Data Record with OMPS NP.

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This summary is machine-generated.

A 40-year record of polar mesospheric clouds (PMCs) was extended using Ozone Mapping and Profiling Suite (OMPS) data. Analysis reveals smaller trends in PMC ice water content (IWC) since 1998, with regional differences in significance and solar activity response.

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Area of Science:

  • Atmospheric Science
  • Planetary Science
  • Climate Science

Background:

  • Polar mesospheric clouds (PMCs) are key indicators of upper atmosphere conditions.
  • Long-term monitoring is crucial for understanding PMC trends and variability.
  • Previous studies relied on the Solar Backscatter Ultraviolet (SBUV) instrument record.

Purpose of the Study:

  • To extend the 40-year PMC record using new instrument data.
  • To analyze trends in PMC ice water content (IWC) and their statistical significance.
  • To investigate the response of PMC IWC to solar activity over time.

Main Methods:

  • Utilized Solar Backscatter Ultraviolet (SBUV) instrument measurements.
  • Merged data from SBUV and Ozone Mapping and Profiling Suite (OMPS) Nadir Profiler (NP) instruments.
  • Performed regression analysis on the extended PMC data record.

Main Results:

  • Successfully extended the PMC record by incorporating OMPS NP data.
  • Observed smaller trends in PMC ice water content (IWC) since approximately 1998.
  • Northern Hemisphere trends are statistically significant (95% confidence); Southern Hemisphere trends are not.
  • PMC IWC response to solar activity has decreased in the Northern Hemisphere but increased in the Southern Hemisphere since 1998.

Conclusions:

  • The OMPS NP instrument is suitable for extending the SBUV PMC data record.
  • Recent PMC trends are less pronounced than previously suggested, with hemispheric differences.
  • The relationship between PMC IWC and solar activity exhibits distinct regional changes.