A5066931600- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Ionosphere and magnetosphere dynamics
- Air Quality Monitoring and Forecasting
- Methane Hydrates and Related Phenomena
- Astro and Planetary Science
- Climate variability and models
- Calibration and Measurement Techniques
- Astrophysics and Star Formation Studies
- Geophysics and Gravity Measurements
- Atmospheric aerosols and clouds
- Solar and Space Plasma Dynamics
- Spacecraft and Cryogenic Technologies
- Superconducting and THz Device Technology
- Hydrocarbon exploration and reservoir analysis
- Precipitation Measurement and Analysis
- Astrophysics and Cosmic Phenomena
- Space Exploration and Technology
- Advanced Chemical Sensor Technologies
- Planetary Science and Exploration
- Soil Moisture and Remote Sensing
- Water Quality Monitoring and Analysis
- Stellar, planetary, and galactic studies
Nagoya University
2014-2025
Earth and Space Research
2016-2025
National Institute for Environmental Studies
2000-2024
St Petersburg University
2024
Institute of Solar-Terrestrial Physics
2014-2015
Abstract. The Sentinel-5 Precursor (S5P) mission with the TROPOspheric Monitoring Instrument (TROPOMI) on board has been measuring solar radiation backscattered by Earth's atmosphere and surface since its launch 13 October 2017. In this paper, we present for first time S5P operational methane (CH4) carbon monoxide (CO) products' validation results covering a period of about 3 years using global Total Carbon Column Observing Network (TCCON) Infrared Working Group Detection Atmospheric...
Abstract. TROPOMI (the TROPOspheric Monitoring Instrument), on board the Sentinel-5 Precursor (S5P) satellite, has been monitoring Earth's atmosphere since October 2017 with an unprecedented horizontal resolution (initially 7 km2×3.5 km2, upgraded to 5.5 km2 in August 2019). air quality is one of main objectives TROPOMI; it obtains measurements important pollutants such as nitrogen dioxide, carbon monoxide, and formaldehyde (HCHO). In this paper we assess latest HCHO products versions...
The Superconducting Submillimeter‐Wave Limb‐Emission Sounder (SMILES) was successfully launched and attached to the Japanese Experiment Module (JEM) on International Space Station (ISS) 25 September 2009. It has been making atmospheric observations since 12 October 2009 with aid of a 4 K mechanical cooler superconducting mixers for submillimeter limb‐emission sounding in frequency bands 624.32–626.32 GHz 649.12–650.32 . On basis observed spectra, data processing retrieving vertical profiles...
This report describes a validation study of Greenhouse gases Observing Satellite (GOSAT) data processing using ground‐based measurements the Total Carbon Column Network (TCCON) as reference for column‐averaged dry air mole fractions atmospheric carbon dioxide (X CO2 ). We applied photon path length probability density function method to validate X retrievals from GOSAT obtained during 22 months starting June 2009. permitted direct evaluation optical modifications due light scattering that...
In this study, the characterization of Hydrogen Chloride (HCl) seasonal variations and inter-annual linear trend are presented for first time over polluted region at Hefei (117°10'E, 31°54'N), China. The series HCl were retrieved by mid-infrared (MIR) solar spectra recorded ground-based high-resolution Fourier transform infrared spectroscopy (FTIR) between July, 2015 April, 2019. magnitude reaches a peak in January (2.70 ± 0.16) × 1015 molecules*cm-2 minimum September (2.27 0.09)...
Abstract. Spaceborne formaldehyde (HCHO) measurements constitute an excellent proxy for the sources of non-methane volatile organic compounds (NMVOCs). Past studies suggested substantial overestimations NMVOC emissions in state-of-the-art inventories over major source regions. Here, QA4ECV (Quality Assurance Essential Climate Variables) retrieval HCHO columns from OMI (Ozone Monitoring Instrument) is evaluated against (1) FTIR (Fourier-transform infrared) column observations at 26 stations...
Abstract This study presents the ozone monitoring instrument (OMI) Collection 4 formaldehyde (HCHO) retrieval developed with Smithsonian Astrophysical Observatory's (SAO) Making Earth System Data Records for Use in Research Environments (MEaSUREs) algorithm. The algorithm updates and makes improvements to NASA operational OMI HCHO (OMI 3 HCHO) algorithm, has been transitioned use Level‐1B radiances. paper describes updated compares data products. exhibits remarkably improved stability over...
Abstract. We present a multiyear time series of column abundances carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) measured using Fourier-transform infrared (FTIR) spectrometers at 10 sites affiliated with the Network for Detection Atmospheric Composition Change (NDACC). Six are high-latitude sites: Eureka, Ny-Ålesund, Thule, Kiruna, Poker Flat, St. Petersburg, four midlatitude Zugspitze, Jungfraujoch, Toronto, Rikubetsu. For each site, interannual trends seasonal...
Abstract. Although optical components in Fourier transform infrared (FTIR) spectrometers are preferably wedged, practice, spectra typically suffer from the effects of resonances (“channeling”) affecting retrieval weakly absorbing gases. This study investigates level channeling each FTIR spectrometer within Network for Detection Atmospheric Composition Change (NDACC). Dedicated were recorded by more than 20 NDACC using a laboratory mid-infrared source and two detectors. In indium antimonide...
Abstract We validate formaldehyde (HCHO) vertical column densities (VCDs) from Ozone Mapping and Profiler Suite Nadir Mapper (OMPS‐NM) instruments onboard the Suomi National Polar‐orbiting Partnership (Suomi NPP) satellite for 2012–2020 Oceanic Atmospheric Administration‐20 (NOAA‐20) 2018–2020, hereafter referred to as OMPS‐NPP OMPS‐N20, with ground‐based Fourier‐Transform Infrared (FTIR) observations of Network Detection Composition Change (NDACC). OMPS‐NPP/N20 HCHO products reproduce...
Abstract. Aircraft measurements of carbon dioxide and methane over Tsukuba (36.05° N, 140.12° E) (February 2010) Moshiri (44.36° 142.26° (August 2009) were made to calibrate ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) compare with the Greenhouse gases Observing SATellite (GOSAT). The aircraft in February 2010 successful synchronizing both g-b FTS GOSAT for first time. Airborne situ flask-sampling instruments mounted on aircraft, carried out between altitudes 0.5 7...
Abstract. We analyzed seasonality and interannual variability of tropospheric hydrogen cyanide (HCN) columns in densely populated eastern China for the first time. The results were derived from solar absorption spectra recorded with a ground-based high-spectral-resolution Fourier transform infrared (FTIR) spectrometer Hefei (31∘54′ N, 117∘10′ E) between 2015 2018. HCN over Hefei, China, showed significant seasonal variations three monthly mean peaks throughout year. magnitude column peaked...
view Abstract Citations (69) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A New Look at the Dark Cloud L1251: Sensitive Observations of Molecular Emission Sato, Fumio ; Mizuno, Akira Nagahama, Tomoo Onishi, Toshikazu Yonekura, Yoshinori Fukui, Yasuo High-sensitivity observations in (12)CO, (13)CO, C(18)O, H(13)CO(+), and SiO line have been made dark cloud L1251 Cepheus. The (13)CO gas shows a cometary distribution with U-shaped dense 'head'...
We retrieved CO 2 volume mixing ratios (VMRs) from solar absorption spectra in the 1.6‐ μ m (30012‐00001) band measured with a ground‐based high‐resolution Fourier transform spectrometer (FTS) at Tsukuba, Japan, using profile retrieval and scaling algorithms. derived time series of column‐averaged VMRs ( X CO2 ) December 2001 to 2007. The average difference between values obtained two algorithms was approximately 0.8 ppm. This attributed differences column averaging kernels corrected...
Abstract. Volatile organic compounds (VOCs) play an important role in modulating the atmosphere’s oxidizing capacity and affect tropospheric ozone, carbon monoxide, formaldehyde, aerosol formation. Space-based observations can provide powerful global information to advance our knowledge of these processes their changes over time. We present here development new retrievals for four key VOCs (methanol, ethene, ethyne, HCN) based on thermal infrared radiance from satellite-borne Cross-track...
Abstract. Tropospheric ozone trends from models and satellites are found to diverge. Ground-based (GB) observations used reference but GB data themselves might display station biases discontinuities. Re-processing with uniform procedures, the TOAR-II Working Group Harmonization Evaluation of Instruments for Free-Tropospheric Ozone Measurements (HEGIFTOM) homogenized public 5 networks: ozonesondes, In-service Aircraft a Global Observing System (IAGOS) profiles, solar absorption...
Abstract. Volatile organic compounds (VOCs) play an important role in modulating the atmosphere's oxidizing capacity and affect tropospheric ozone, carbon monoxide, formaldehyde, aerosol formation. Space-based observations can provide powerful global information to advance our knowledge of these processes their changes over time. We present here development new retrievals for four key VOCs (methanol, ethene, ethyne, HCN) based on thermal infrared radiance from satellite-borne Cross-track...
Abstract. In the polar middle and upper atmosphere, Nitric Oxide (NO) is produced in large amounts by both solar EUV X-ray radiation energetic particle precipitation, its chemical loss driven photodissociation. As a result, atmospheric NO has clear seasonal variability cycle dependency which have been measured satellite-based instruments. On shorter timescales, response to magnetospheric electron precipitation shown take place on day-to-day basis. Despite recent studies using observations...
The Superconducting Submillimeter-Wave Limb-Emission Sounder 2 (SMILES-2) is a satellite mission that will be proposed to the Japan Aerospace Exploration Agency (JAXA) for launch after 2023. It scan atmospheric limb from lower stratosphere thermosphere retrieving profiles of temperature between 15 and 160 km, horizontal wind vector (30-160 km), ground state atomic oxygen (90-160 dynamical tracers ozone-chemistry related species (15-110 km). SMILES-2 designed fit JAXA small equipped with two...
Abstract. Remotely operable compact instruments for measuring atmospheric CO2 and CH4 column densities were developed in two independent systems: one utilizing a grating-based desktop optical spectrum analyzer (OSA) with resolution enough to resolve rotational lines of the regions 1565–1585 1674–1682 nm, respectively; other is an application fiber Fabry-Perot interferometer (FFPI) obtain density. Direct sunlight was collimated via small telescope installed on portable sun tracker then...
We present ground-based millimeter-wave observations of the upper stratospheric and mesospheric ozone, conducted at National Institute for Environmental Studies (NIES) in Tsukuba, Japan (36°N, 140°E). The measurements were started October 1995. radiometer used study is equipped with superconductor-insulator-superconductor (SIS) mixer receiver acousto-optical spectrometer (AOS). Vertical profiles ozone mixing ratio from 20 to 80 km retrieved observed spectra 23 months 1996 August 1998 by...
Abstract. The Sentinel-5 Precursor (S5P) mission with the TROPOspheric Monitoring Instrument (TROPOMI) onboard has been measuring solar radiation backscattered by Earth's atmosphere and its surface since launch on 13 October 2017. Methane (CH4) carbon monoxide (CO) data a spatial resolution (initially 7 x km2, upgraded to 5.5 km2 6th of August 2019) have retrieved from shortwave infrared (SWIR) near-infrared (NIR) measurements end November 2017 made available experts for early validation...
We report extreme enhancements of the nitric oxide (NO) column density observed with ground-based millimeter-wave spectroscopic radiometer installed at Syowa Station, Antarctica, during a large geomagnetic storm in April 2012. From NO spectrum line shape and relationship solar radiation, we concluded that was emitted altitude range between 75 km 100 km. The gradually increased recovery phase. In addition to variations on time frame several days, found diurnal variations. increase related...