Microwave Limb Sounder
Welcome
The Microwave Limb Sounder (MLS) experiments measure naturally-occurring microwave thermal emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and cloud ice. The overall objective of these experiments is to provide information that will help improve our understanding of Earth's atmosphere and global change.
NEAR REAL-TIME DATA VIEWER
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| Maps @ 46hPa; SO2 @ 147hPa and CO @ 215hPa |
Latest Publications
- Witte, J., A. Thompson, H. Smit, M. Fujiwara, F. Posny, G. Coetzee, E. Northam, B. Johnson, C. Sterling, M. Mohamad, S. Ogino, A. Jordan, and F.D. Silva, "First reprocessing of Southern Hemisphere ADditional OZonesondes SHADOZ profile records 1998-2015: 1. Methodology and evaluation," Journal of Geophysical Research: Atmospheres 122, 12, 6611-6636, doi:10.1002/2016jd026403, 2017. reprint
- Choi, H., H. Liu, J. Crawford, D. Considine, D. Allen, B. Duncan, L. Horowitz, J. Rodriguez, S. Strahan, L. Zhang, X. Liu, M. Damon, and S. Steenrod, "Global O3-CO correlations in a chemistry and transport model during July–August: evaluation with TES satellite observations and sensitivity to input meteorological data and emissions," Atmos. Chem. Phys. 17, 13, 8429-8452, doi:10.5194/acp-17-8429-2017, 2017. reprint
- Tweedy, O.V., D.W. Waugh, R.S. Stolarski, L.D. Oman, W.J. Randel, and M. Abalos, "Hemispheric differences in the annual cycle of tropical lower stratosphere transport and tracers," Journal of Geophysical Research: Atmospheres 122, 13, 7183-7199, doi:10.1002/2017jd026482, 2017. reprint
- Wohltmann, I., R. Lehmann, and M. Rex, "Update of the Polar SWIFT model for polar stratospheric ozone loss Polar SWIFT version 2," Geosci. Model Dev. 10, 7, 2671-2689, doi:10.5194/gmd-10-2671-2017, 2017. reprint
- Miyazaki, K., and K. Bowman, "Evaluation of ACCMIP ozone simulations and ozonesonde sampling biases using a satellite-based multi-constituent chemical reanalysis," Atmos. Chem. Phys. 17, 13, 8285-8312, doi:10.5194/acp-17-8285-2017, 2017. reprint
New MLS Level 3 (v4) BrO and HO2 pre-average radiances products
The science team for the Microwave Limb Sounder (MLS) on the Aura satellite is pleased to announce the release of new bromine monoxide (BrO) and hydroperoxyl (HO2) MLS "Version 4" pre-average radiances datasets. The retrieval algorithm produces a pair of zonal mean abundance fields each day - one for the daytime part of the orbit and the other for the nighttime part - from 10o latitude bin zonal mean radiances. By sacrificing spatial resolution, the noise level and the biases in the retrieved profiles are greatly reduced.
Notable advantages over the standard level 2 products include the first long-term nighttime HO2 satellite record and a wider pressure range (21 - 0.003 hPa) for the HO2 dataset (the standard Level 2 product covers only 21 - 0.046 hPa). Further information can be found at Millán et al. (2012) and Millán et al. (2015).
These new datasets are available at the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC): ML3DZMBRO and ML3DZMHO2. Users are urged to read their data quality documents (available from the same location) and contact the MLS science team with any questions.
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