Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements

Sica, R. J.; Izawa, M. R. M.; Walker, Kaley A.; Boone, C. D.; Petelina, S. V.; Argall, P. S.; Bernath, P. F.; Burns, G. B.; Catoire, Valéry; Collins, R. L.; Daffer, W. H.; Clercq, C. De; Fan, Zhongyu; Firanski, B.; French, John; Gérard, Pierre; Gerding, M.; Granville, J.; Innis, J. L.; Keckhut, Philippe; Kerzenmacher, Tobias; Klekociuk, Andrew; Kyrö, E.; Lambert, Jean-Christopher; Llewellyn, E. J.; Manney, G. L.; McDermid, I. Stuart; Mizutani, K.; Murayama, Yasuhiro; Piccolo, C.; Raspollini, Piera; Ridolfi, Marco; Robert, Cédric; Steinbrecht, Wolfgang; Strawbridge, K. B.; Strong, Kimberly; Stübi, René; Thurairajah, B.

doi:10.5194/acp-8-35-2008

Cited by 66 publications

(59 citation statements)

References 84 publications

(78 reference statements)

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“…The ozone profiles are retrieved from the 9.6 µm channel, in the vertical range ∼12-∼100 km with a vertical spacing of ∼0.4 km. The temperature and wind data have been used extensively for comparisons and scientific publications (e.g., Sica et al, 2008;Forbes et al, 2006;Petelina et al, 2005b;Mertens et al, 2004). However, at the time of writing, there are no published comparisons for the SABER trace gas data.…”

Section: Timed/sabermentioning

confidence: 99%

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

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143

126

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Abstract. This paper presents extensive bias determination analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloonborne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45-60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within ±10% (average values within ±6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (∼35-55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45-55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.

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Section: Timed/sabermentioning

confidence: 99%

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

Self Cite

143

126

View full text Add to dashboard Cite

show abstract

“…The atmospheric temperature and pressure retrieval uses micro-windows that are primarily attenuated by CO 2 absorption. As described in Sica et al (2008), the ACE temperature data can exhibit large unphysical vertical oscillations in the mesosphere and to a lesser extent in the stratosphere. These oscillations appear to be caused by retrieval artifacts that will be addressed in the next version of ACE and occur in only a small fraction of the data.…”

Section: Comparisons To Acementioning

confidence: 99%

“…Version 3.0 is in production at this time, and a more complete comparison using this updated dataset will be carried out in the near future. The temperature product for ACE version 2.2 is discussed in Sica et al (2008). ACE is a solar occultation sensor, but rather than the broadband measurements used by SOFIE, ACE derives temperature from its Fourier Transform Spectrometer (FTS) instrument that covers the spectral region 750 to 4400 cm −1 .…”

Section: Comparisons To Acementioning

confidence: 99%

Retrieval of temperature and pressure using broadband solar occultation: SOFIE approach and results

et al. 2011

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Abstract. Measurement of atmospheric temperature as a function of pressure, T (P ), is key to understanding many atmospheric processes and a prerequisite for retrieving gas mixing ratios and other parameters from solar occultation measurements. This paper gives a brief overview of the solar occultation measurement technique followed by a detailed discussion of the mechanisms that make the measurement sensitive to temperature. Methods for retrieving T (P ) using both broadband transmittance and refraction are discussed. Investigations using measurements of broadband transmittance in two CO 2 absorption bands (the 4.3 and 2.7 µm bands) and refractive bending are then presented. These investigations include sensitivity studies, simulated retrieval studies, and examples from SOFIE.

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“…In the context of polar processing, this difficulty is far greater because most of the commonly used polar processing diagnostics require temperature data with spatial coverage greater than ground-based measurements, such as those from the Network for the Detection of Atmospheric Composition Change (see www.ndacc.org), can provide. Large-scale independent temperature measurements can be obtained from some satellite instruments like the Upper Atmosphere Research Satellite Microwave Limb Sounder (MLS), Aura MLS, and Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS), but these measurements typically have biases of their own (e.g., Schwartz et al, 2008;Sica et al, 2008). Many polar processing diagnostics also require information about the polar vortex from potential vorticity (PV) data, which cannot be provided by any measurement system.…”

Section: Introductionmentioning

confidence: 99%

Comparisons of polar processing diagnostics from 34 years of the ERA-Interim and MERRA reanalyses

et al. 2015

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Abstract. We present a comprehensive comparison of polar processing diagnostics derived from the National Aeronautics and Space Administration (NASA) Modern Era Retrospective-analysis for Research and Applications (MERRA) and the European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Reanalysis (ERAInterim). We use diagnostics that focus on meteorological conditions related to stratospheric chemical ozone loss based on temperatures, polar vortex dynamics, and air parcel trajectories to evaluate the effects these reanalyses might have on polar processing studies. Our results show that the agreement between MERRA and ERA-Interim changes significantly over the 34 years from 1979 to 2013 in both hemispheres and in many cases improves. By comparing our diagnostics during five time periods when an increasing number of higher-quality observations were brought into these reanalyses, we show how changes in the data assimilation systems (DAS) of MERRA and ERA-Interim affected their meteorological data. Many of our stratospheric temperature diagnostics show a convergence toward significantly better agreement, in both hemispheres, after 2001 when Aqua and GOES (Geostationary Operational Environmental Satellite) radiances were introduced into the DAS. Other diagnostics, such as the winter mean volume of air with temperatures below polar stratospheric cloud formation thresholds (V PSC ) and some diagnostics of polar vortex size and strength, do not show improved agreement between the two reanalyses in recent years when data inputs into the DAS were more comprehensive. The polar processing diagnostics calculated from MERRA and ERA-Interim agree much better than those calculated from earlier reanalysis data sets. We still, however, see fairly large differences in many of the diagnostics in years prior to 2002, raising the possibility that the choice of one reanalysis over another could significantly influence the results of polar processing studies. After 2002, we see overall good agreement among the diagnostics, which demonstrates that the ERA-Interim and MERRA reanalyses are equally appropriate choices for polar processing studies of recent Arctic and Antarctic winters.

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Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements

Cited by 66 publications

References 84 publications

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Retrieval of temperature and pressure using broadband solar occultation: SOFIE approach and results

Comparisons of polar processing diagnostics from 34 years of the ERA-Interim and MERRA reanalyses

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