Capability for ozone high-precision retrieval on JEM/SMILES observation

Takahashi, C.; Mitsuda, Chihiro; Ochiai, Satoshi; Manago, Naohiro; Hayashi, Hiroo; Iwata, Yoshitaka; Imai, Koji; Sano, Takeshi; Takayanagi, M.; Shiotani, Masato

doi:10.1016/j.asr.2011.04.038

Cited by 19 publications

(25 citation statements)

References 26 publications

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“…During one scan, two spectral bands are measured among the three predefined ones, named A (624.3-625.5 GHz), B (625.1-626.3 GHz) and C (649.1-650.3 GHz) (for more details, see the SMILES Mission Plan, version 2.1, at http://smiles.nict.go.jp/Mission_Plan/). In this paper, we use the version 2.1 data provided by JAXA Takahashi et al, 2010Takahashi et al, , 2011, here named SMILES-O. We also include the results from the processor (version 2.1.5) developed by NICT, named here SMILES-R (Sato et al, 2012;Sagawa et al, 2013).…”

Section: Sub-millimetre Wave Limb-viewing Measurementsmentioning

confidence: 99%

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments

et al. 2013

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Abstract. The diurnal variation of HOCl and the related species ClO, HO2 and HCl measured by satellites has been compared with the results of a one-dimensional photochemical model. The study compares the data from various limb-viewing instruments with model simulations from the middle stratosphere to the lower mesosphere. Data from three sub-millimetre instruments and two infrared spectrometers are used, namely from the Sub-Millimetre Radiometer (SMR) on board Odin, the Microwave Limb Sounder (MLS) on board Aura, the Superconducting Submillimeter-wave Limb-Emission Sounder (SMILES) on the International Space Station, the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board ENVISAT, and the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) on board SCISAT. Inter-comparison of the measurements from instruments on sun-synchronous satellites (SMR, MLS, MIPAS) and measurements from solar occultation instruments (ACE-FTS) is challenging since the measurements correspond to different solar zenith angles (or local times). However, using a model which covers all solar zenith angles and data from the SMILES instrument which measured at all local times over a period of several months provides the possibility to verify the model and to indirectly compare the diurnally variable species. The satellite data were averaged for latitudes of 20° S to 20° N for the SMILES observation period from November 2009 to April 2010 and were compared at three altitudes: 35, 45 and 55 km. Besides presenting the SMILES data, the study also shows a first comparison of the latest MLS data (version 3.3) of HOCl, ClO, and HO2 with other satellite observations, as well as a first evaluation of HO2 observations made by Odin/SMR. The MISU-1D model has been carefully initialised and run for conditions and locations of the observations. The diurnal cycle features for the species investigated here are generally well reproduced by the model. The satellite observations and the model agree well in terms of absolute mixing ratios. The differences between the day and night values of the model are in good agreement with the observations although the amplitude of the HO2 diurnal variation is 10–20% lower in the model than in the observations. In particular, the data offered the opportunity to study the reaction ClO+HO2 → HOCl+O2 in the lower mesosphere at 55 km. At this altitude the HOCl night-time variation depends only on this reaction. The result of this analysis points towards a value of the rate constant within the range of the JPL 2006 recommendation and the upper uncertainty limit of the JPL 2011 recommendation at 55 km.

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Section: Sub-millimetre Wave Limb-viewing Measurementsmentioning

confidence: 99%

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments

et al. 2013

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“…The brightest ozone emission is the line at 625.37 GHz, which is located in Bands A and B [Kikuchi et al, 2010]. The SMILES Version 2.0 Level 2 products [Takahashi et al, 2010[Takahashi et al, , 2011Mistuda et al, 2011] include the retrieved ozone profiles for the altitude region of 8-85 km, but we used data from above 20 km because the accuracy of SMILES data in the troposphere is low due to the uncertainty associated with the continuum emission by water vapor and scattering by clouds [Takahashi et al, 2010]. The vertical resolution of the Level 2 data is 2 km for altitudes between 20 and 58 km, and 3 km above 58 km.…”

Section: Smilesmentioning

confidence: 99%

Diurnal ozone variations in the stratosphere revealed in observations from the Superconducting Submillimeter‐Wave Limb‐Emission Sounder (SMILES) on board the International Space Station (ISS)

et al. 2013

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[1] Considerable uncertainties remain in the global pattern of diurnal variation in stratospheric ozone, particularly lower to middle stratospheric ozone, which is the principal contributor to total column ozone. The Superconducting Submillimeter-Wave LimbEmission Sounder (SMILES) attached to the Japanese Experiment Module (JEM) on board the International Space Station (ISS) was developed to gather high-quality global measurements of stratospheric ozone at various local times, with the aid of superconducting mixers cooled to 4K by a compact mechanical cooler. Using the SMILES dataset, as well as data from nudged chemistry-climate models (MIROC3.2-CTM and SD-WACCM), we show that the SMILES observational data have revealed the global pattern of diurnal ozone variations throughout the stratosphere. We also found that these variations can be explained by both photochemistry and dynamics. The peak-to-peak difference in the stratospheric ozone mixing ratio (total column ozone) reached 8% (1%) over the course of a day. This variation needs to be considered when merging ozone data from different satellite measurements and even from measurements made using one specific instrument at different local times.

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“…O 3 is the major species in the stratosphere and mesosphere, which is quite important in atmospheric radiation transfer. Using the high sensitivity 20 lines in the 643 GHz bands can measure O 3 with high precision (Takahashi et al, 2011;Kasai et al, 2013). The only lines of HCl below 1 THz are in the 625 GHz frequency band, thus HCl can be measured by 643 GHz radiometer.…”

Section: Instrument Characteristicsmentioning

confidence: 99%

Performance Evaluation of THz Atmospheric Limb Sounder (TALIS) of China

Wang¹,

Wang²,

Duan³

2019

Preprint

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THz Atmospheric Limb Sounder (TALIS) is a microwave limb sounder being developed for atmospheric high precision observation by the National Space Science Center, Chinese Academy of Sciences (NSSC, CAS). It is designed to measure the temperature and chemical species such as O 3 , HCl, ClO, N 2 O, NO, NO 2 , HOCl, H 2 O, HNO 3 , HCN, CO, SO 2 , 10 BrO, HO 2 , H 2 CO, CH 3 Cl, CH 3 OH, and CH 3 CN with high vertical resolution from surface to about 100 km to improve our comprehension of atmospheric chemistry and dynamics, and to monitor the man-made pollution in the atmosphere. Four heterodyne radiometers including several FFT spectrometers of 2 GHz bandwidth with 2 MHz resolution are employed to obtain the atmospheric thermal emission in broad spectral regions centred near 118, 190, 240, and 643 GHz. A theoretical simulation is performed to estimate the retrieval precision of the main targets. Single scan measurement and averaged 15 measurement are considered in simulation, respectively. Temperature profile can be obtained with the precision of < 2K for a single scan from 15 to 85 km by using 118 GHz radiometer, and the 240 and 643 GHz radiometer can provide temperature information in the upper troposphere. Chemical species such as H 2 O, O 3 , HCl, N 2 O, and HNO 3 show high single scan retrieval precision of 1-50% at most altitudes. The other species should be retrieved by using averaged measurements because of the weak intensity or low abundance. 20 IntroductionHigh precision observation of the Earth's atmosphere is essential to the numerical weather prediction and climate change studies. The satellite can provide global coverage atmospheric monitoring in a short time. Instruments such as nadir microwave sounder and infrared sounder have been applied to measure the atmospheric temperature and humidity but with the poor vertical resolution and altitude range (Swadley et al., 2008). Terahertz limb sounder can not only provide the 25 temperature profile with better vertical resolution but gather information on chemical composition in a wide altitude range and independent of the day-night cycle. Microwave limb sounding is a particularly useful technique in detecting stratospheric and mesospheric temperature and chemistry, and also has large potential for global wind measurement in the middle and upper atmosphere (Ochiai et al., 2017). Bands selectionThe spectral bands of TALIS are selected with the following criterions: (1) maximizing the number of species which will exert a strong influence on atmospheric chemistry and dynamics, (2) necessary space between the passband, (3) trade-off between realizable bandwidth and resolution. TALIS covers most spectral bands of EOS MLS and extends them. The broader bandwidth, finer resolution, and lower noise of TALIS can provide higher retrieval precision and effective altitude 15 range compared with EOS MLS. More chemical species can be measured by TALIS, such as NO 2 , NO, H 2 CO, and SO 2 (normal concentration).The 118 GHz radiometer, covering the strong O 2 line at 118.75 GH...

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Capability for ozone high-precision retrieval on JEM/SMILES observation

Cited by 19 publications

References 26 publications

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments

Diurnal ozone variations in the stratosphere revealed in observations from the Superconducting Submillimeter‐Wave Limb‐Emission Sounder (SMILES) on board the International Space Station (ISS)

Performance Evaluation of THz Atmospheric Limb Sounder (TALIS) of China

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Capability for ozone high-precision retrieval on JEM/SMILES observation

Cited by 19 publications

References 26 publications

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO&lt;sub&gt;2&lt;/sub&gt; at the equator: comparison of 1-D model calculations with measurements by satellite instruments

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO&lt;sub&gt;2&lt;/sub&gt; at the equator: comparison of 1-D model calculations with measurements by satellite instruments

Diurnal ozone variations in the stratosphere revealed in observations from the Superconducting Submillimeter‐Wave Limb‐Emission Sounder (SMILES) on board the International Space Station (ISS)

Performance Evaluation of THz Atmospheric Limb Sounder (TALIS) of China

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Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments

Diurnal variation of stratospheric and lower mesospheric HOCl, ClO and HO<sub>2</sub> at the equator: comparison of 1-D model calculations with measurements by satellite instruments