OSIRIS: A Decade of Scattered Light

McLinden, Chris A.; Bourassa, A. E.; Brohede, Samuel; Cooper, M. J.; Degenstein, D. A.; Evans, W.; Gattinger, R. L.; Haley, C. S.; Llewellyn, E. J.; Lloyd, N. D.; Loewen, P.; Martin, Randall V.; McConnell, J. C.; McDade, I. C.; Murtagh, Donal; Rieger, Landon; Savigny, Christian von; Sheese, Patrick E.; Sioris, C. E.; Solheim, B. H.; Strong, Kimberly

doi:10.1175/bams-d-11-00135.1

Cited by 38 publications

(35 citation statements)

References 66 publications

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“…The instrument performed occultations of selected stars by means of four spectrometers. We use aerosol extinction profiles at 550 nm retrieved by the Aer-GOM algorithm, which was developed using an improved aerosol parameterization (McLinden et al, 2012). The primary instrument is an optical spectrograph (OS) operating in the 284-810 nm range and providing between 100 and 400 vertical profiles per day depending on the time of year.…”

Section: Satellite Aerosol Soundersmentioning

confidence: 99%

Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations

et al. 2017

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Section: Satellite Aerosol Soundersmentioning

confidence: 99%

Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations

et al. 2017

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“…The OSIRIS instrument began standard stratospheric limb scattered sunlight measurements in early 2002, shortly after launch on the Odin satellite in 2001 (Llewellyn et al, 2004;Murtagh et al, 2002;McLinden et al, 2012) and remains fully operational at the present time. The spectra, which cover the 280-800 nm wavelength range, are used in combination with a spherical radiative transfer model that accounts for multiple scattering (Bourassa et al, 2008) and a non-linear relaxation inversion to retrieve profiles of ozone number density from 10 to 60 km altitudes with approximately 2 km vertical resolution and successive samples about every 500 km along the polar orbit track .…”

Section: Data Set Descriptionsmentioning

confidence: 99%

Trends in stratospheric ozone derived from merged SAGE II and Odin-OSIRIS satellite observations

et al. 2014

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Abstract. Stratospheric ozone profile measurements from the Stratospheric Aerosol and Gas Experiment (SAGE) II satellite instrument are combined with those from the Optical Spectrograph and InfraRed Imager System (OSIRIS) instrument on the Odin satellite (2001-Present) to quantify interannual variability and decadal trends in stratospheric ozone between 60 • S and 60 • N. These data are merged into a multi-instrument, long-term stratospheric ozone record (1984-present) by analyzing the measurements during the overlap period of 2002-2005 when both satellite instruments were operational. The variability in the deseasonalized time series is fit using multiple linear regression with predictor basis functions including the quasi-biennial oscillation, El Niño-Southern Oscillation index, solar activity proxy, and the pressure at the tropical tropopause, in addition to two linear trends (one before and one after 1997), from which the decadal trends in ozone are derived. From 1984 to 1997, there are statistically significant negative trends of 5-10 % per decade throughout the stratosphere between approximately 30 and 50 km. From 1997 to present, a statistically significant recovery of 3-8 % per decade has taken place throughout most of the stratosphere with the notable exception between 40 • S and 40 • N below approximately 22 km where the negative trend continues. The recovery is not significant between 25 and 35 km altitudes when accounting for a conservative estimate of instrument drift.

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“…The optical spectrograph measures limb scattered sunlight at 280-810 nm, with a ∼ 1 nm spectral resolution. A review of the first decade of OSIRIS measurements is given by McLinden et al (2012).…”

Section: The Osiris Ozone Data Set From 2001 To the Presentmentioning

confidence: 99%

Assessment of Odin-OSIRIS ozone measurements from 2001 to the present using MLS, GOMOS, and ozonesondes

et al. 2014

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Abstract. The Optical Spectrograph and InfraRed Imaging System (OSIRIS) was launched aboard the Odin satellite in 2001 and is continuing to take limb-scattered sunlight measurements of the atmosphere. This work aims to characterize and assess the stability of the OSIRIS 11 yr v5.0x ozone data set. Three validation data sets were used: the v2.2 Microwave Limb Sounder (MLS) and v6 Global Ozone Monitoring by Occultation of Stars (GOMOS) satellite data records, and ozonesonde measurements. Global mean percent differences between coincident OSIRIS and validation measurements are within 5 % at all altitudes above 18.5 km for MLS, above 21.5 km for GOMOS, and above 17.5 km for ozonesondes. Below 17.5 km, OSIRIS measurements agree with ozonesondes within 5 % and are well-correlated (R > 0.75) with them. For low OSIRIS optics temperatures (< 16 • C), OSIRIS ozone measurements have a negative bias of 1-6 % compared with the validation data sets for 25.5-40.5 km. Biases between OSIRIS ascending and descending node measurements were investigated and found to be related to aerosol retrievals below 27.5 km. Above 30 km, agreement between OSIRIS and the validation data sets was related to the OSIRIS retrieved albedo, which measures apparent upwelling, with a positive bias in OSIRIS data with large albedos. In order to assess the long-term stability of OSIRIS measurements, global average drifts relative to the validation data sets were calculated and were found to be < 3 % per decade for comparisons with MLS for 19.5-36.5 km, GOMOS for 18.5-54.5 km, and ozonesondes for 12.5-22.5 km. Above 36.5 km, the relative drift for OSIRIS versus MLS ranged from ∼ 0 to 6 % per decade, depending on the data set used to convert MLS data to the OSIRIS altitude versus number density grid. Overall, this work demonstrates that the OSIRIS 11 yr ozone data set from 2001 to the present is suitable for trend studies.

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OSIRIS: A Decade of Scattered Light

Cited by 38 publications

References 66 publications

Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations

Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations

Trends in stratospheric ozone derived from merged SAGE II and Odin-OSIRIS satellite observations

Assessment of Odin-OSIRIS ozone measurements from 2001 to the present using MLS, GOMOS, and ozonesondes

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