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- Title
The MOPITT Version 9 CO Product: Sampling Enhancements and Validation.
- Authors
Deeter, Merritt; Francis, Gene; Gille, John; Mao, Debbie; Martínez-Alonso, Sara; Worden, Helen; Ziskin, Dan; Drummond, James; Commane, Roísín; Diskin, Glenn; McKain, Kathryn
- Abstract
Characteristics of the Version 9 (V9) MOPITT ("Measurements of Pollution in the Troposphere") satellite retrieval product for tropospheric carbon monoxide (CO) are described. The new V9 product includes many CO retrievals over land which, in previous MOPITT product versions, would have been discarded by the cloud detection algorithm. Globally, the number of daytime MOPITT retrievals over land has increased by 30-40 % relative to the Version 8 product, although the increase in retrieval coverage exhibits significant geographical variability. Areas benefiting from the improved cloud detection performance include (but are not limited to) source regions often characterized by high aerosol concentrations. The V9 MOPITT product also incorporates a modified calibration strategy for the MOPITT near-infrared (NIR) CO channels, resulting in greater temporal consistency for the NIR-only and thermal infrared-near infrared (TIR-NIR) retrieval variants. Validation results based on in-situ CO profiles acquired from aircraft in a variety of contexts indicate that retrieval biases for V9 are typically within the range of ±5 % and are generally comparable to results for the V8 product.
- Subjects
CARBON monoxide; POLLUTION measurement; TROPOSPHERIC aerosols; AEROSOLS; TROPOSPHERE; NEW product development
- Publication
Atmospheric Measurement Techniques Discussions, 2021, p1
- ISSN
1867-8610
- Publication type
Article
- DOI
10.5194/amt-2021-370