The Earth observing system microwave limb sounder (EOS MLS) on the aura Satellite

Waters, J. W.; Froidevaux, L.; Harwood, R. S.; Jarnot, R. F.; Pickett, Herbert M.; Read, W. G.; Siegel, Peter H.; Cofield, R. E.; Filipiak, M. J.; Flower, D. A.; Holden, James R.; Lau, G.K.; Livesey, N. J.; Manney, G. L.; Pumphrey, Hugh C.; Santee, M. L.; Wu, Dong L.; Cuddy, D.; Lay, R.; Loo, M. S.; Perun, V. S.; Schwartz, M.; Stek, P. C.; Thurstans, R. P.; Boyles, Mark A.; Chandra, Kumar; Chavez, M. C.; Chen, Gun-Shing; Chudasama, Bijal; Dodge, Randy; Fuller, R. A.; Girard, M. A.; Jiang, Jonathan H.; Jiang, Yibo; Knosp, B.; LaBelle, Remi; Lam, Jonathan C.; Lee, K.A.; Miller, David C.; Oswald, J.; Patel, Neesha; Pukala, D.; Quintero, O. Lucía; Scaff, D.M.; Snyder, W. Van; Tope, Mike; Wagner, Paul; Walch, Marc

doi:10.1109/tgrs.2006.873771

Cited by 1,235 publications

(935 citation statements)

References 43 publications

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“…The MLS instrument on board the Aura satellite provides global measurements of upper tropospheric and stratospheric water vapor [Waters et al, 2006]. The MLS water vapor data have a vertical resolution of~3 km.…”

Section: Datamentioning

confidence: 99%

The representation of the TTL in a tropical channel version of the WRF model

et al. 2013

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[1] In this study, the Weather Research Forecast (WRF) model is used to investigate key physical processes controlling the Tropical Tropopause Layer (TTL) temperature and water vapor distributions in December 2005 to January-February 2006. The model domain is configured as a tropical channel with a horizontal grid spacing of 36 km, a vertical grid spacing of 500 m, and a top at 0.1 hPa. Initial and boundary conditions are set using the ERA-Interim reanalysis data set. An ozone distribution computed from satellite and ozonesonde measurements is used for radiative forcing calculations. The model's ability to replicate observed TTL temperatures is evaluated via comparisons with radiosonde data and reanalyses (MERRA and ERA-Interim). The Microwave Limb Sounder (MLS) water vapor measurements are used to evaluate WRF-simulated water vapor in the TTL. Results of the simulations show that the model reproduces the mean temperature and its variability above 50 hPa as well as the tropical tropopause height. However, the model cold point tropopause temperature is colder than the reanalyses by~1.2 K. The model captures the location of TTL water vapor minimum in the Western Pacific but is drier than the MLS observations in the TTL. To assess possible reasons for the tropopause temperature discrepancy, an additional WRF experiment was conducted using analysis nudging for water vapor. This experiment produces more tropical cirrus clouds in the upper troposphere and a warming of~1.5 K of the cold point tropopause. This suggests that the radiative effects of cirrus clouds and water vapor must be considered for accurate temperature simulations in the TTL.

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Section: Datamentioning

confidence: 99%

The representation of the TTL in a tropical channel version of the WRF model

et al. 2013

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“…[50] In this section HIRDLS ozone is compared to the v2.2 ozone product of Aura-MLS [Waters et al, 2006;Froidevaux et al, 2006]. MLS data were screened on the basis of quality, status, and threshold values listed at http://mls.jpl.nasa.gov/ data/MLS_v2.2_miniQualityDocument.pdf.…”

Section: Mlsmentioning

confidence: 99%

Initial validation of ozone measurements from the High Resolution Dynamics Limb Sounder

et al. 2008

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[1] Comparisons of the latest High Resolution Dynamics Limb Sounder (HIRDLS) ozone retrievals (v2.04.09) are made with ozonesondes, ground-based lidars, airborne lidar measurements made during the Intercontinental Chemical Transport Experiment-B, and satellite observations. A large visual obstruction blocking over 80% of the HIRDLS field of view presents significant challenges to the data analysis methods and implementation, to the extent that the radiative properties of the obstruction must be accurately characterized in order to adequately correct measured radiances. The radiance correction algorithms updated as of August 2007 are used in the HIRDLS v2.04.09 data presented here. Comparisons indicate that HIRDLS ozone is recoverable between 1 and 100 hPa at middle and high latitudes and between 1 and 50 hPa at low latitudes. Accuracy of better than 10% is indicated between 1 and 30 hPa (HIRDLS generally low) by the majority of the comparisons with coincident measurements, and 5% is indicated between 2 and 10 hPa when compared with some lidars. Between 50 and 100 hPa, at middle and high latitudes, accuracy is 10-20%. The ozone precision is estimated to be generally 5-10% between 1 and 50 hPa. Comparisons with ozonesondes and lidars give strong indication that HIRDLS is capable of resolving fine vertical ozone features (1-2 km) in the region between 1 and 50 hPa. Development is continuing on the radiance correction and the cloud detection and filtering algorithms, and it is hoped that it will be possible to achieve a further reduction in the systematic bias and an increase in the measurement range downward to lower heights (at pressures greater than 50-100 hPa).

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“…To achieve this goal, ground-based, balloon-borne, airborne and satellite instruments have been used to monitor ozone abundances in the atmosphere during the last decades. For satellite instruments, different observation techniques including solar/stellar occultation measurements (e.g., SAGE -Stratospheric Aerosol and Gas Experiment (McCormick et al, 1989); HALOE -Halogen Occultation Experiment (Russell et al, 1994); ACE -Atmospheric Chemistry Experiment (McElroy et al, 2007); GOMOSGlobal Ozone Monitoring by Occultation of Stars (Bertaux et al, 2010)), limb scatter/emission measurements (e.g., MLS -Microwave Limb Sounder (Waters et al, 2006); MIPAS -Michelson Interferometer for Passive Atmospheric Sounding (Fischer et al, 2008); OSIRIS -Optical Spectrograph and InfraRed Imager System (Llewellyn et al, 2004)) and nadir measurements (e.g., GOME/GOME2 -Global Ozone Monitoring Experiment Callies et al, 2000); OMI -Ozone Monitoring Instrument (Levelt et al, 2006); IASI -Infrared Atmospheric Sounding Interferometer (Clerbaux et al, 2009)) are used (see, e.g., Sofieva et al, 2013;Hassler et al, 2014, and references therein). The passive imaging spectrometer used in this study, SCIA-MACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CartograpHY), provided vertical distributions of atmospheric trace gases by employing the limb-scattering measurement technique (Burrows et al, 1995;Bovensmann et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Global validation of SCIAMACHY limb ozone data (versions 2.9 and 3.0, IUP Bremen) using ozonesonde measurements

Jia¹,

Rozanov²,

Ladstätter-Weißenmayer³

et al. 2015

Atmos. Meas. Tech.

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Abstract. In this paper, the latest SCIAMACHY limb ozone scientific vertical profiles, namely the current V2.9 and the upcoming V3.0, are extensively compared with ozonesonde data from the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) database. The comparisons are made on a global scale from 2003 to 2011, involving 61 sonde stations. The retrieval processors used to generate V2.9 and V3.0 data sets are briefly introduced. The comparisons are discussed in terms of vertical profiles and stratospheric partial columns. Our results indicate that the V2.9 ozone profile data between 20 and 30 km are in good agreement with ground-based measurements, with less than 5 % relative differences in the latitude range of 90 • S-40 • N (with the exception of the tropical Pacific region, where an overestimation of more than 10 % is observed), which corresponds to less than 5 DU partial-column differences. In the tropics the differences are within 3 %. However, this data set shows a significant underestimation northwards of 40 • N (up to ∼ 15 %). The newly developed V3.0 data set reduces this bias to below 10 % while maintaining a good agreement southwards of 40 • N with slightly increased relative differences of up to 5 % in the tropics.

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The Earth observing system microwave limb sounder (EOS MLS) on the aura Satellite

Cited by 1,235 publications

References 43 publications

The representation of the TTL in a tropical channel version of the WRF model

The representation of the TTL in a tropical channel version of the WRF model

Initial validation of ozone measurements from the High Resolution Dynamics Limb Sounder

Global validation of SCIAMACHY limb ozone data (versions 2.9 and 3.0, IUP Bremen) using ozonesonde measurements

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