Strato‐mesospheric ozone measurements using ground‐based millimeter‐wave spectroscopy at Thule, Greenland

Muscari, Giovanni; Cesaroni, Claudio; Fiorucci, I.; Smith, Anne K.; Froidevaux, L.; Mlynczak, Martin G.

doi:10.1029/2011jd016863

Cited by 6 publications

(12 citation statements)

References 29 publications

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“…A detailed description of the OE algorithm is given by Rodgers (1976Rodgers ( , 2000, while the adaptation of the general theory to GBMS measurements has been extensively presented in Fiorucci et al (2011) and Muscari et al (2012). Here we briefly illustrate only those aspects of the GBMS inversion technique necessary to better characterize the retrieved profiles presented in this work.…”

Section: Gbms Datasetmentioning

confidence: 99%

“…Upper stratospheric/mesospheric O 3 observations obtained from the GBMS narrow-band spectrometer have already been presented by Muscari et al (2012).…”

Section: Gbms Observing Techniquementioning

confidence: 99%

“…All of the MLS O 3 and HNO 3 profiles measured over the GBMS observing periods (approximately from mid-January to midMarch 2010, and 2012for HNO 3 , 2011and 2012 for O 3 ) within 1 • latitude and 8 • longitude from Thule are averaged together to give one O 3 and one HNO 3 profile. Using a single a priori for each of the two datasets ensures that the interannual differences as well as the seasonal evolution observed in the GBMS datasets do not depend on the a priori.…”

Section: Gbms Datasetmentioning

confidence: 99%

“…Since then, four winter campaigns have been carried out during the period JanuaryMarch 2009-2012(Di Biagio et al, 2010Muscari et al, 2012), and regular winter campaigns are planned for the future.…”

Section: Introductionmentioning

confidence: 99%

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Ground-based stratospheric O3 and HNO3 measurements at Thule, Greenland: an intercomparison with Aura MLS observations

et al. 2013

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Abstract. In response to the need for improving our understanding of the evolution and the interannual variability of the winter Arctic stratosphere, in January 2009 a GroundBased Millimeter-wave Spectrometer (GBMS) was installed at the Network for the Detection of Atmospheric Composition Change (NDACC) site in Thule (76.5 • N, 68.8 • W), Greenland. In this work, stratospheric GBMS O 3 and HNO 3 vertical profiles obtained from Thule during the winters 2010 (HNO 3 only), 2011 and 2012 are characterized and intercompared with co-located measurements of the Aura Microwave Limb Sounder (MLS) experiment. Using a recently developed algorithm based on Optimal Estimation, we find that the GBMS O 3 retrievals show good sensitivity (> 80 %) to atmospheric variations between ∼ 17 and ∼ 50 km, where their 1σ uncertainty is estimated to be the larger of ∼ 11 % or 0.2 ppmv. Similarly, HNO 3 profiles can be considered for scientific use between ∼ 17 and ∼ 45 km altitude, with a 1σ uncertainty that amounts to the larger of 15 % or 0.2 ppbv. Comparisons with Aura MLS version 3.3 observations show that, on average, GBMS O 3 mixing ratios are biased negatively with respect to MLS throughout the stratosphere, with differences ranging between ∼ 0.3 ppmv (8 %) and 0.9 ppmv (18 %) in the 17-50 km vertical range. GBMS HNO 3 values display instead a positive bias with respect to MLS up to 26 km, reaching a maximum of ∼ 1 ppbv (10 %) near the mixing ratio profile peak. O 3 and HNO 3 values from the two datasets prove to be well correlated at all altitudes, although their correlations worsen at the lower end of the altitude ranges considered. Column contents of GBMS and MLS O 3 (from 20 km upwards) and HNO 3 (from 17 km upwards) correlate very well and indicate that GBMS measurements can provide valuable estimates of column interannual and seasonal variations for these compounds.

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Section: Gbms Datasetmentioning

confidence: 99%

“…Upper stratospheric/mesospheric O 3 observations obtained from the GBMS narrow-band spectrometer have already been presented by Muscari et al (2012).…”

Section: Gbms Observing Techniquementioning

confidence: 99%

Section: Gbms Datasetmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ground-based stratospheric O3 and HNO3 measurements at Thule, Greenland: an intercomparison with Aura MLS observations

et al. 2013

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“…Muscari et al, 2012;Palm et al, 2010). Hartogh et al (2004), using the 142 GHz O 3 line in northern Norway (69.29 • N, 10.13…”

Section: Introductionmentioning

confidence: 99%

Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer

Daae

Straub

Espy

et al. 2014

Earth Syst. Sci. Data

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Abstract. This paper describes the stratospheric and mesospheric ozone profiles retrieved from spectral measurements of the 249.96 GHz O 3 line, using the British Antarctic Survey's ground-based Microwave Radiometer at Troll (BAS-MRT), Antarctica (72• 01 S, 02• 32 E, 62• Mlat). The instrument operated at Troll from February 2008 through January 2010, and hourly averaged spectra were used to retrieve approximately 20 ozone profiles per day. The ozone profiles cover the pressure range from 3 hPa to 0.02 hPa (approximately 38 to 72 km) which includes the topside of the stratospheric ozone layer and the peak of the tertiary maximum. Comparing the retrieved ozone volume mixing ratio (vmr) values to Aura/MLS and SD-WACCM shows no significant bias to within the instrumental uncertainties. The long-term variations (> 20 days) between MLS and SD-WACCM agree well with BAS-MRT at all altitudes with significant correlation coefficients of at least 0.9 (0.7 with SD-WACCM) in the upper stratosphere and middle mesosphere. A weaker correlation is found for the long-term variations in summer when most of the vmr values are below the random noise level of Aura/MLS. The correlation of short-term variations (< 20 days) between MLS and BAS-MRT agree well at all altitudes with significant correlation coefficients of at least 0.7 in the upper stratosphere and middle mesosphere. The ozone profiles retrieved at Troll, Antarctica extend the sparse data coverage of middle atmospheric ozone above Antarctica, where, due to the dynamic nature of the ozone concentrations, systematic observations with a high temporal resolution are desirable. The O 3 profiles presented here are stored at the UK's Polar Data Centre (http://doi.org/nc3) and are available for public scientific use.

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Comparison of a photochemical model with observations of mesospheric hydroxyl and ozone

et al. 2013

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[1] We present a comparison of a photochemical model with mesospheric hydroxyl (OH) data from the Spatial Heterodyne Imager for Mesospheric Radicals (SHIMMER) and mesospheric ozone (O 3 ) data from the Sounding of the Atmosphere with Broadband Emission Radiometry (SABER). Although SHIMMER and SABER do not measure the atmosphere coincidently, by sampling the photochemical model at the appropriate local time of each measurement, an effective concurrent test of mesospheric odd oxygen and odd hydrogen theory can be achieved. Consistent with previous, more limited analyses of SHIMMER data, we find no evidence of a systematic model overprediction of mesospheric OH. However, at 80 km, the standard chemical scheme shows a model deficit in the morning hours and a dramatic model excess in the late afternoon. Using a higher rate coefficient for the H + O 2 + M ! HO 2 + M reaction ameliorates this problem. Such a higher rate is consistent with the only reported laboratory measurements at the low temperatures appropriate to the mesosphere. Regarding the SABER ozone, the model significantly underpredicts the data. Some of this could be explained by a previously reported, systematic high bias to the SABER ozone, and comparisons of our model with Microwave Limb Sounder data support that suggestion. Nonetheless, a persistent model ozone deficit remains. Since the model agreement with SHIMMER OH is generally very good, this model ozone deficit is unlikely to be due to a mischaracterization of mesospheric HOx.

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Strato‐mesospheric ozone measurements using ground‐based millimeter‐wave spectroscopy at Thule, Greenland

Cited by 6 publications

References 29 publications

Ground-based stratospheric O<sub>3</sub> and HNO<sub>3</sub> measurements at Thule, Greenland: an intercomparison with Aura MLS observations

Ground-based stratospheric O<sub>3</sub> and HNO<sub>3</sub> measurements at Thule, Greenland: an intercomparison with Aura MLS observations

Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer

Comparison of a photochemical model with observations of mesospheric hydroxyl and ozone

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Strato‐mesospheric ozone measurements using ground‐based millimeter‐wave spectroscopy at Thule, Greenland

Cited by 6 publications

References 29 publications

Ground-based stratospheric O&lt;sub&gt;3&lt;/sub&gt; and HNO&lt;sub&gt;3&lt;/sub&gt; measurements at Thule, Greenland: an intercomparison with Aura MLS observations

Ground-based stratospheric O&lt;sub&gt;3&lt;/sub&gt; and HNO&lt;sub&gt;3&lt;/sub&gt; measurements at Thule, Greenland: an intercomparison with Aura MLS observations

Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer

Comparison of a photochemical model with observations of mesospheric hydroxyl and ozone

Contact Info

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Ground-based stratospheric O<sub>3</sub> and HNO<sub>3</sub> measurements at Thule, Greenland: an intercomparison with Aura MLS observations

Ground-based stratospheric O<sub>3</sub> and HNO<sub>3</sub> measurements at Thule, Greenland: an intercomparison with Aura MLS observations