Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone
<p>Ozone (O<span class="inline-formula"><sub>3</sub></span>) plays a significant role in weather and climate on regional to global spatial scales. Most studies on the variability in the total column of O<span class="inline-formula"><sub>3...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-03-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/14/1673/2021/amt-14-1673-2021.pdf |
| _version_ | 1818410844600401920 |
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| author | W. Wang W. Wang W. Wang T. Cheng R. J. van der A J. de Laat J. E. Williams |
| author_facet | W. Wang W. Wang W. Wang T. Cheng R. J. van der A J. de Laat J. E. Williams |
| author_sort | W. Wang |
| collection | DOAJ |
| description | <p>Ozone (O<span class="inline-formula"><sub>3</sub></span>) plays a significant role in weather and
climate on regional to global spatial scales. Most studies on the
variability in the total column of O<span class="inline-formula"><sub>3</sub></span> (TCO) are typically carried out
using daytime data. Based on knowledge of the chemistry and transport of
O<span class="inline-formula"><sub>3</sub></span>, significant deviations between daytime and night-time O<span class="inline-formula"><sub>3</sub></span> are
only expected either in the planetary boundary layer (PBL) or high in the
stratosphere or mesosphere, with little effect on the TCO. Hence, we
expect the daytime and night-time TCO to be very similar. However, a detailed
evaluation of satellite measurements of daytime and night-time TCO is still
lacking, despite the existence of long-term records of both. Thus, comparing
daytime and night-time TCOs provides a novel approach to verifying the
retrieval algorithms of instruments such as the Atmospheric Infrared Sounder (AIRS)
and the Microwave Limb Sounder (MLS). In addition, such a comparison also
helps to assess the value of night-time TCO for scientific research.
Applying this verification on the AIRS and the MLS data, we identified
inconsistencies in observations of O<span class="inline-formula"><sub>3</sub></span> from both satellite
instruments. For AIRS, daytime–night-time differences were found over oceans
resembling cloud cover patterns and over land, mostly over dry land areas,
which is likely related to infrared surface emissivity. These differences point to
issues with the representation of both processes in the AIRS retrieval
algorithm. For MLS, a major issue was identified with the
“ascending–descending” orbit flag, used to discriminate night-time and
daytime MLS measurements. Disregarding this issue, MLS day–night differences
were significantly smaller than AIRS day–night differences, providing
additional support for the retrieval method origin of AIRS in stratospheric
column ozone (SCO) day–night differences. MLS day–night differences are
dominated by the upper-stratospheric and mesospheric diurnal O<span class="inline-formula"><sub>3</sub></span> cycle. These results provide useful information for improving infrared
O<span class="inline-formula"><sub>3</sub></span> products.</p> |
| first_indexed | 2024-12-14T10:21:59Z |
| format | Article |
| id | doaj.art-07ed07ef50284f7a9ced270b345313bd |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-14T10:21:59Z |
| publishDate | 2021-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-07ed07ef50284f7a9ced270b345313bd2022-12-21T23:06:32ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482021-03-01141673168710.5194/amt-14-1673-2021Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozoneW. Wang0W. Wang1W. Wang2T. Cheng3R. J. van der A4J. de Laat5J. E. Williams6Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaRoyal Netherlands Meteorological Institute (KNMI), De Bilt 3730 AE, the NetherlandsAerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaRoyal Netherlands Meteorological Institute (KNMI), De Bilt 3730 AE, the NetherlandsRoyal Netherlands Meteorological Institute (KNMI), De Bilt 3730 AE, the NetherlandsRoyal Netherlands Meteorological Institute (KNMI), De Bilt 3730 AE, the Netherlands<p>Ozone (O<span class="inline-formula"><sub>3</sub></span>) plays a significant role in weather and climate on regional to global spatial scales. Most studies on the variability in the total column of O<span class="inline-formula"><sub>3</sub></span> (TCO) are typically carried out using daytime data. Based on knowledge of the chemistry and transport of O<span class="inline-formula"><sub>3</sub></span>, significant deviations between daytime and night-time O<span class="inline-formula"><sub>3</sub></span> are only expected either in the planetary boundary layer (PBL) or high in the stratosphere or mesosphere, with little effect on the TCO. Hence, we expect the daytime and night-time TCO to be very similar. However, a detailed evaluation of satellite measurements of daytime and night-time TCO is still lacking, despite the existence of long-term records of both. Thus, comparing daytime and night-time TCOs provides a novel approach to verifying the retrieval algorithms of instruments such as the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS). In addition, such a comparison also helps to assess the value of night-time TCO for scientific research. Applying this verification on the AIRS and the MLS data, we identified inconsistencies in observations of O<span class="inline-formula"><sub>3</sub></span> from both satellite instruments. For AIRS, daytime–night-time differences were found over oceans resembling cloud cover patterns and over land, mostly over dry land areas, which is likely related to infrared surface emissivity. These differences point to issues with the representation of both processes in the AIRS retrieval algorithm. For MLS, a major issue was identified with the “ascending–descending” orbit flag, used to discriminate night-time and daytime MLS measurements. Disregarding this issue, MLS day–night differences were significantly smaller than AIRS day–night differences, providing additional support for the retrieval method origin of AIRS in stratospheric column ozone (SCO) day–night differences. MLS day–night differences are dominated by the upper-stratospheric and mesospheric diurnal O<span class="inline-formula"><sub>3</sub></span> cycle. These results provide useful information for improving infrared O<span class="inline-formula"><sub>3</sub></span> products.</p>https://amt.copernicus.org/articles/14/1673/2021/amt-14-1673-2021.pdf |
| spellingShingle | W. Wang W. Wang W. Wang T. Cheng R. J. van der A J. de Laat J. E. Williams Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone Atmospheric Measurement Techniques |
| title | Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone |
| title_full | Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone |
| title_fullStr | Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone |
| title_full_unstemmed | Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone |
| title_short | Verification of the Atmospheric Infrared Sounder (AIRS) and the Microwave Limb Sounder (MLS) ozone algorithms based on retrieved daytime and night-time ozone |
| title_sort | verification of the atmospheric infrared sounder airs and the microwave limb sounder mls ozone algorithms based on retrieved daytime and night time ozone |
| url | https://amt.copernicus.org/articles/14/1673/2021/amt-14-1673-2021.pdf |
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