Microwave Limb Sounder

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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.

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Hunga Tonga Volcano: Reminder on the Proper Use of MLS Data

There is understandably a widespread interest in using Aura Microwave Limb Sounder (MLS) observations to examine the impact of the Hunga Tonga volcano on the stratosphere. MLS is certainly a unique resource in this regard, and we in the MLS team look forward to hearing about and/or participating in such research in the time ahead. In the meantime, we must underscore that MLS data should only be used if they meet the screening criteria described in the MLS data quality document. These criteria measure how well the retrieved profiles fit the atmospheric microwave spectra observed. A profile that does not meet these criteria does not fit the MLS-measured radiances well, and thus should not be considered a valid MLS measurement. We are in the early stages of evaluating the MLS observations of the clearly highly perturbed stratosphere, and will follow up with more information as it becomes evident. As ever, we welcome any queries from the user community. Many thanks to you all for your interest in and use of MLS data.

Latest Publications

  1. Daskalakis, N., L. Gallardo, M. Kanakidou, R. Nüß, C. Menares, R. Rondanelli, A. Thompson and M. Vrekoussis
    Impact of biomass burning and stratospheric intrusions in the remote South Pacific Ocean troposphere
    Atmos. Chem. Phys. Discuss. doi:10.5194/acp-2021-640 in review
  2. Froidevaux, L., D. Kinnison, M. Santee, L. Millan, N. Livesey, W. Read, C. Bardeen, J. Orlando and R. Fuller
    Upper stratospheric ClO and HOCl trends 2005–2020: Aura Microwave Limb Sounder and model results
    Atmos. Chem. Phys. Discuss. doi:10.5194/acp-2021-880 in review
  3. Ghysels, M., G. Durry, N. Amarouche, J. Samake, F. Frérot and E. Rivière
    A lightweight balloon-borne mid-infrared hygrometer to probe the middle atmosphere: Pico-Light H&ltsub&gt2&lt/sub&gtO. Comparison with Aura-MLS v4 and v5 satellite measurements
    Atmospheric Measurement Techniques Discussions doi:10.5194/amt-2020-269 in review
  4. Hindley, N., N. Cobbett, D. Fritts, D. Janchez, N. Mitchell, T. Moffat-Griffin, A. Smith and C. Wright
    Radar observations of winds, waves and tides in the mesosphere and lower thermosphere over South Georgia island 54°S, 36°W and comparison to WACCM simulations
    Atmos. Chem. Phys. Discuss. doi:10.5194/acp-2021-981 in review
  5. Khaykin, S., E. Moyer, M. Krämer, B. Clouser, S. Bucci, B. Legras, A. Lykov, A. Afchine, F. Cairo, I. Formanyuk, V. Mitev, R. Matthey, C. Rolf, C. Singer, N. Spelten, V. Volkov, V. Yushkov and F. Stroh
    Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone
    Atmos. Chem. Phys. Discuss. doi:10.5194/acp-2021-653 in review