Ground‐based measurements of ozone and NO<sub>2</sub>during MANTRA 1998 using a Zenith‐sky spectrometer

Bassford, Matt; Strong, Kimberly; McLinden, Chris A.; McElroy, C. T.

doi:10.3137/ao.430404

Cited by 21 publications

(19 citation statements)

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“…The AMF at 90° SZA for NO 2 was 17.137 and for O 3 was 16.924. The error estimates for the DOAS were derived by Bassford et al [2005] for mid‐latitude conditions and modified for Arctic conditions to yield 8% for O 3 and 15% for NO 2 . The MAESTRO‐G and SPS O 3 columns reported here have estimated errors of 5%.…”

Section: Resultsmentioning

confidence: 99%

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Kerzenmacher

2005

Geophysical Research Letters

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[1] The 2004 Canadian Arctic ACE Validation Campaign was conducted to provide correlative data for validating measurements from the Atmospheric Chemistry Experiment (ACE) satellite mission. These measurements were made at Eureka, Nunavut during polar springtime 2004. Six groundbased instruments were operated during the intensive phase of the campaign and ozonesondes and radiosondes were flown. During this time, ACE-FTS and ACE-MAESTRO were performing solar-occultation measurements over the Canadian Arctic. We report the first comparisons between campaign measurements and those from ACE, focusing on O 3 , NO 2 and temperature. Initial mean O 3 profiles from ACE-FTS and ACE-MAESTRO agree to within 20% between 10 and 30 km, and the NO 2 profiles agree to within 40% between 17 and 40 km, which is within the standard deviations. The ACE-FTS temperature profiles agree to better than 2.5 K with the radiosonde temperatures from 10 to 32 km and with the lidar temperatures from 17 to 45 km.

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Section: Resultsmentioning

confidence: 99%

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Kerzenmacher

2005

Geophysical Research Letters

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“…All spectra presented in this paper have been analyzed with this spectrum. The benefits of using a single reference spectrum consist in avoiding different systematic errors which could affect the analysis process [41]. …”

Section: Methodsmentioning

confidence: 99%

Measurements of Tropospheric NO2 in Romania Using a Zenith-Sky Mobile DOAS System and Comparisons with Satellite Observations

Constantin

Merlaud

Roozendaël

et al. 2013

Sensors

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In this paper we present a new method for retrieving tropospheric NO2 Vertical Column Density (VCD) from zenith-sky Differential Optical Absorption Spectroscopy (DOAS) measurements using mobile observations. This method was used during three days in the summer of 2011 in Romania, being to our knowledge the first mobile DOAS measurements peformed in this country. The measurements were carried out over large and different areas using a mobile DOAS system installed in a car. We present here a step-by-step retrieval of tropospheric VCD using complementary observations from ground and space which take into account the stratospheric contribution, which is a step forward compared to other similar studies. The detailed error budget indicates that the typical uncertainty on the retrieved NO2tropospheric VCD is less than 25%. The resulting ground-based data set is compared to satellite measurements from the Ozone Monitoring Instrument (OMI) and the Global Ozone Monitoring Experiment-2 (GOME-2). For instance, on 18 July 2011, in an industrial area located at 47.03°N, 22.45°E, GOME-2 observes a tropospheric VCD value of (3.4 ± 1.9) × 1015 molec./cm2, while average mobile measurements in the same area give a value of (3.4 ± 0.7) × 1015 molec./cm2. On 22 August 2011, around Ploiesti city (44.99°N, 26.1°E), the tropospheric VCD observed by satellites is (3.3 ± 1.9) × 1015 molec./cm2 (GOME-2) and (3.2 ± 3.2) × 1015 molec./cm2 (OMI), while average mobile measurements give (3.8 ± 0.8) × 1015 molec./cm2. Average ground measurements over “clean areas”, on 18 July 2011, give (2.5 ± 0.6) × 1015 molec./cm2 while the satellite observes a value of (1.8 ± 1.3) × 1015 molec./cm2.

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“…The UT-GBS was assembled in 1998 and has since participated in seven polar sunrise campaigns at AStrO/PEARL (1999 (Bassford et al, 2005;Farahani, 2006;Farahani et al, 2008 1 ). It consists of a triplegrating spectrometer with a thermo-electrically cooled, backilluminated, 2048×512 pixel CCD (charged-coupled device) array detector.…”

Section: Instrumentsmentioning

confidence: 99%

“…The averaging method can be used, or the VCD at Bassford et al (2005) and references therein. For DSCDs, they include random noise on the spectra, instrument error arising from uncertainties in the dark current, bias, and slit function, pseudo-random errors resulting from unaccounted-for structure in the spectra, errors in the absorption cross-sections, the temperature dependence of the NO 2 cross section, and the effects of Raman scattering, which fills in the absorption lines.…”

Section: Derivation Of Vertical Column Densitiesmentioning

confidence: 99%

Intercomparison of UV-visible measurements of ozone and NO<sub>2</sub> during the Canadian Arctic ACE validation campaigns: 2004–2006

Fraser

Goutail²,

Strong

et al. 2008

Atmos. Chem. Phys.

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Abstract. The first three Canadian Arctic ACE validation campaigns were held during polar sunrise at Eureka, Nunavut, Canada (80 • N, 86 • W) from 2004 to 2006 in support of validation of the ACE (Atmospheric Chemistry Experiment) satellite mission. Three or four zenith-sky viewing UV-visible spectrometers have taken part in each of the three campaigns. The differential slant column densities and vertical column densities of ozone and NO 2 from these instruments have been compared following the methods of the UV-visible Working Group of the NDACC (Network for Detection of Atmospheric Composition Change). The instruments are found to partially agree within the required accuracies for both species, although both the vertical and slant column densities are more scattered than required. This might be expected given the spatial and temporal variability of the Arctic stratosphere in spring. The vertical column densities are also compared to integrated total columns from ozonesondes and integrated partial columns from the ACE-FTS (ACE-Fourier Transform Spectrometer) and ACE-MAESTRO (ACE-Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation) instruments on board ACE. For both species, the columns Correspondence to: A. Fraser (amery@atmosp.physics.utoronto.ca) from the ground-based instruments and the ozonesondes are found to generally agree within their combined error bars. The ACE-FTS ozone partial columns and the ground-based total columns agree within 4.5%, averaged over the three campaigns. The ACE-MAESTRO ozone partial columns are generally smaller than those of the ground-based instruments, by an average of 9.9%, and are smaller than the ACE-FTS columns by an average of 14.4%. The ACE-FTS NO 2 partial columns are an average of 13.4% smaller than the total columns from the ground-based instruments, as expected. The ACE-MAESTRO NO 2 partial columns are larger than the total columns of the ground-based instruments by an average of 2.5% and are larger than the partial columns of the ACE-FTS by an average of 15.5%.

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Ground‐based measurements of ozone and NO₂during MANTRA 1998 using a Zenith‐sky spectrometer

Cited by 21 publications

References 60 publications

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Measurements of Tropospheric NO2 in Romania Using a Zenith-Sky Mobile DOAS System and Comparisons with Satellite Observations

Intercomparison of UV-visible measurements of ozone and NO<sub>2</sub> during the Canadian Arctic ACE validation campaigns: 2004–2006

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Ground‐based measurements of ozone and NO2during MANTRA 1998 using a Zenith‐sky spectrometer

Cited by 21 publications

References 60 publications

Measurements of O3, NO2 and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Measurements of O3, NO2 and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Measurements of Tropospheric NO2 in Romania Using a Zenith-Sky Mobile DOAS System and Comparisons with Satellite Observations

Intercomparison of UV-visible measurements of ozone and NO&lt;sub&gt;2&lt;/sub&gt; during the Canadian Arctic ACE validation campaigns: 2004–2006

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Ground‐based measurements of ozone and NO₂during MANTRA 1998 using a Zenith‐sky spectrometer

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Measurements of O₃, NO₂ and Temperature during the 2004 Canadian Arctic ACE Validation Campaign

Intercomparison of UV-visible measurements of ozone and NO<sub>2</sub> during the Canadian Arctic ACE validation campaigns: 2004–2006