Isamu Morino
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View article: TROPOMI/WFMD v2.0: Improved retrievals of XCH <sub>4</sub> and XCO with XGBoost-based quality filtering
TROPOMI/WFMD v2.0: Improved retrievals of XCH <sub>4</sub> and XCO with XGBoost-based quality filtering Open
The TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel-5 Precursor satellite provides daily global observations of atmospheric methane (CH4) and carbon monoxide (CO) at relatively high spatial resolution. The dense spatial …
View article: Five years of GOSAT-2 retrievals with RemoTeC: XCO <sub>2</sub> and XCH <sub>4</sub> data products with quality filtering by machine learning
Five years of GOSAT-2 retrievals with RemoTeC: XCO <sub>2</sub> and XCH <sub>4</sub> data products with quality filtering by machine learning Open
Accurately measuring greenhouse gas concentrations to identify regional sources and sinks is essential for effectively monitoring and mitigating their impact on the Earth's changing climate. In this article we present the scientific data p…
View article: Towards routine shipborne measurements of columnar CO <sub>2</sub> , CH <sub>4</sub> , CO, and NO <sub>2</sub> : a case study for tracking regional-scale emission patterns
Towards routine shipborne measurements of columnar CO <sub>2</sub> , CH <sub>4</sub> , CO, and NO <sub>2</sub> : a case study for tracking regional-scale emission patterns Open
Mobile remote sensing observations from shipborne platforms offer a unique opportunity for validating satellite observations and sampling plumes of greenhouse gases and short-lived air pollutants from the world's highly populated coastal m…
View article: Annual Growth Rates of Column-Averaged CO <sub>2</sub> Inferred from Total Carbon Column Observing Network (TCCON)
Annual Growth Rates of Column-Averaged CO <sub>2</sub> Inferred from Total Carbon Column Observing Network (TCCON) Open
Monitoring annual atmospheric CO2 growth rates is a key constraint on assessing the long-term effectiveness of emission reduction strategies. We analyzed annual growth rates of column-averaged dry-air mole fractions of CO2 (XCO2) using lon…
View article: An Error Model for Evaluating the Accuracy of Satellite-Based XCO$_2$ Products
An Error Model for Evaluating the Accuracy of Satellite-Based XCO$_2$ Products Open
Several satellites (e.g., OCO-2 & 3) and their derived products now provide spatially extensive coverage of the abundance of carbon dioxide in the atmospheric column (XCO$_2$). However, the accuracy of the XCO$_2$ reported in these product…
View article: Global transport of stratospheric aerosol produced by Ruang eruption from EarthCARE ATLID, limb-viewing satellites and ground-based lidar observations
Global transport of stratospheric aerosol produced by Ruang eruption from EarthCARE ATLID, limb-viewing satellites and ground-based lidar observations Open
The Atmospheric LIDar (ATLID) instrument of the ESA’s Earth Cloud, Aerosol and Radiation Explorer (EarthCARE) satellite mission launched in May 2024 provides high-resolution vertical profiling of aerosols and clouds at 355 nm. Fully operat…
View article: The Inter-comparison of GOSAT, GOSAT-2 and OCO-2/3 XCO2 Measurements over East Asia and Validated with TCCON Observations
The Inter-comparison of GOSAT, GOSAT-2 and OCO-2/3 XCO2 Measurements over East Asia and Validated with TCCON Observations Open
View article: Ground-based tropospheric ozone measurements: regional tropospheric ozone column trends from the TOAR-II/HEGIFTOM homogenized datasets
Ground-based tropospheric ozone measurements: regional tropospheric ozone column trends from the TOAR-II/HEGIFTOM homogenized datasets Open
Quantifying long-term free-tropospheric ozone trends is essential for understanding the impact of human activities and climate change on atmospheric chemistry. However, this is complicated by two key challenges: the differences among exist…
View article: Global CH <sub>4</sub> fluxes derived from JAXA/GOSAT lower-tropospheric partial column data and the CarbonTracker Europe-CH <sub>4</sub> atmospheric inverse model
Global CH <sub>4</sub> fluxes derived from JAXA/GOSAT lower-tropospheric partial column data and the CarbonTracker Europe-CH <sub>4</sub> atmospheric inverse model Open
Satellite-driven inversions provide valuable information about methane (CH4) fluxes, but the assimilation of total column-averaged dry-air mole fractions of CH4 (XCH4) has been challenging. This study explores, for the first time, the pote…
View article: Comparisons of the v11.1 Orbiting Carbon Observatory‐2 (OCO‐2) X<sub>CO2</sub> Measurements With GGG2020 TCCON
Comparisons of the v11.1 Orbiting Carbon Observatory‐2 (OCO‐2) X<sub>CO2</sub> Measurements With GGG2020 TCCON Open
The Orbiting Carbon Observatory 2 (OCO‐2) is NASA's first Earth observation satellite mission dedicated to studying the sources and sinks of carbon dioxide (CO 2 ) on a global scale. The observations of reflected sunlight are inverted in a…
View article: Twilight Near-Infrared Radiometry for Stratospheric Aerosol Layer Height
Twilight Near-Infrared Radiometry for Stratospheric Aerosol Layer Height Open
The impact of stratospheric aerosols on Earth’s climate, particularly through atmospheric heating and ozone depletion, remains a critical area of atmospheric research. While satellite data provide valuable insights, independent validation …
View article: Long-term and interannual variations of atmospheric methane observed by the NIES and collaborative observation networks
Long-term and interannual variations of atmospheric methane observed by the NIES and collaborative observation networks Open
Effective action for climate change mitigation requires an accurate understanding of global greenhouse gas budgets, including those of methane (CH 4 ). Atmospheric measurement data provide key constraints for estimating the magnitudes and …
View article: 5 Years of GOSAT-2 Retrievals with RemoTeC: XCO <sub>2</sub> and XCH <sub>4</sub> Data Products with Quality Filtering by Machine Learning
5 Years of GOSAT-2 Retrievals with RemoTeC: XCO <sub>2</sub> and XCH <sub>4</sub> Data Products with Quality Filtering by Machine Learning Open
Accurately measuring greenhouse gas concentrations to identify regional sources and sinks is essential for effectively monitoring and mitigating their impact on the Earth’s changing climate. In this article we present the scientific data p…
View article: Methane emissions from Australia estimated by inverse analysis using in-situ and Satellite (GOSAT) atmospheric observations
Methane emissions from Australia estimated by inverse analysis using in-situ and Satellite (GOSAT) atmospheric observations Open
Australia has significant sources of atmospheric methane (CH₄), driven by extensive coal and natural gas production, livestock, and large-scale fires. Accurate quantification and characterization of CH₄ emissions are critical for effective…
View article: Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations
Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations Open
We perform an inverse modelling analysis to quantify biomass burning emissions of carbon monoxide (CO) from the extreme wildfires in Canada between May and September 2023. Using the GEOS-Chem model, we assimilated observations from the Tro…
View article: Supplementary material to "Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations"
Supplementary material to "Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations" Open
View article: Fiducial Reference Measurements for Greenhouse Gases (FRM4GHG): Validation of Satellite (Sentinel-5 Precursor, OCO-2, and GOSAT) Missions Using the COllaborative Carbon Column Observing Network (COCCON)
Fiducial Reference Measurements for Greenhouse Gases (FRM4GHG): Validation of Satellite (Sentinel-5 Precursor, OCO-2, and GOSAT) Missions Using the COllaborative Carbon Column Observing Network (COCCON) Open
The COllaborative Carbon Column Observing Network has become a reliable source of high-quality ground-based remote sensing network data that provide column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbo…
View article: Global CH <sub>4</sub> Fluxes Derived from JAXA/GOSAT Lower Tropospheric Partial Column Data and the CTE-CH <sub>4</sub> Atmospheric Inverse Model
Global CH <sub>4</sub> Fluxes Derived from JAXA/GOSAT Lower Tropospheric Partial Column Data and the CTE-CH <sub>4</sub> Atmospheric Inverse Model Open
Satellite-driven inversions provide valuable information about methane (CH4) fluxes, but the assimilation of total column-averaged dry-air mole fractions of CH4 (XCH4) has been challenging. This study explores, for the first time, the pote…
View article: Aura Ozone Monitoring Instrument (OMI) Collection 4 Formaldehyde Products
Aura Ozone Monitoring Instrument (OMI) Collection 4 Formaldehyde Products Open
This study presents the ozone monitoring instrument (OMI) Collection 4 formaldehyde (HCHO) retrieval developed with the Smithsonian Astrophysical Observatory's (SAO) Making Earth System Data Records for Use in Research Environments (MEaSUR…
View article: The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): objectives, conceptual framework and scientific contributions
The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): objectives, conceptual framework and scientific contributions Open
The Japanese Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW) will be an Earth-observing satellite to conduct global observations of atmospheric carbon dioxide (CO 2 ), methane (CH 4 ), and nitrogen dioxide (NO 2 …
View article: Ground-based Tropospheric Ozone Measurements: Regional tropospheric ozone column trends from the TOAR-II/ HEGIFTOM homogenized datasets
Ground-based Tropospheric Ozone Measurements: Regional tropospheric ozone column trends from the TOAR-II/ HEGIFTOM homogenized datasets Open
The quantification of long-term free-tropospheric ozone trends is essential for understanding the impact of human activities and climate change on atmospheric chemistry, but is challenged by the diversity between satellite tropospheric ozo…
View article: Recent Decreases in the Growth Rate of Atmospheric HCFC‐22 Column Derived From the Ground‐Based FTIR Harmonized Retrievals at 16 NDACC Sites
Recent Decreases in the Growth Rate of Atmospheric HCFC‐22 Column Derived From the Ground‐Based FTIR Harmonized Retrievals at 16 NDACC Sites Open
HCFC‐22 is an ozone‐depleting substance with a greenhouse effect. The atmospheric mole fractions of HCFC‐22 have been increasing since the 1950s. Within the NDACC‐IRWG network, HCFC‐22 mol fractions can be retrieved from solar absorption s…
View article: Estimation and Evaluation of Land Surface Reflectance from a Next-Generation Geostationary Meteorological Satellite, Himawari-8/9 AHI
Estimation and Evaluation of Land Surface Reflectance from a Next-Generation Geostationary Meteorological Satellite, Himawari-8/9 AHI Open
View article: Local and regional enhancements of CH <sub>4</sub> , CO, and CO <sub>2</sub> inferred from TCCON column measurements
Local and regional enhancements of CH <sub>4</sub> , CO, and CO <sub>2</sub> inferred from TCCON column measurements Open
In this study, we demonstrate the utility of available correlative measurements of carbon species to identify regional and local air mass characteristics as well as their associated source types. In particular, we combine different regress…
View article: The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): Objectives, conceptual framework and scientific contributions
The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): Objectives, conceptual framework and scientific contributions Open
The Japanese Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW) will be an Earth-observing satellite to conduct global observations of atmospheric carbon dioxide (CO2), methane (CH4), and nitro…
View article: Evidence of a dual African and Australian biomass burning influence on the vertical distribution of aerosol and carbon monoxide over the southwest Indian Ocean basin in early 2020
Evidence of a dual African and Australian biomass burning influence on the vertical distribution of aerosol and carbon monoxide over the southwest Indian Ocean basin in early 2020 Open
During the 2020 austral summer, the pristine atmosphere of the southwest Indian Ocean (SWIO) basin experienced significant perturbations. This study examines the variability of aerosols and carbon monoxide (CO) over this remote oceanic reg…
View article: Fast retrieval of XCO <sub>2</sub> over east Asia based on Orbiting Carbon Observatory-2 (OCO-2) spectral measurements
Fast retrieval of XCO <sub>2</sub> over east Asia based on Orbiting Carbon Observatory-2 (OCO-2) spectral measurements Open
The increase in greenhouse gas concentrations, particularly CO2, has significant implications for global climate patterns and various aspects of human life. Spaceborne remote sensing satellites play a crucial role in high-resolution monito…
View article: Emission Characteristics of Greenhouse Gases and Air Pollutants in Northern Hemisphere Cities: Comprehensive Assessment Using Ground‐Based Fourier Transform Spectrometers
Emission Characteristics of Greenhouse Gases and Air Pollutants in Northern Hemisphere Cities: Comprehensive Assessment Using Ground‐Based Fourier Transform Spectrometers Open
Despite the importance of understanding the urban emission characteristics of greenhouse gases (GHGs) and air pollutants, few studies have conducted integrated assessments across diverse urban environments. Herein, we conducted a comprehen…
View article: Aura Ozone Monitoring Instrument (OMI) Collection 4 Formaldehyde Product
Aura Ozone Monitoring Instrument (OMI) Collection 4 Formaldehyde Product Open
This study presents the Ozone Monitoring Instrument (OMI) Collection 4 formaldehyde (HCHO) retrieval developed with the Smithsonian Astrophysical Observatory’s (SAO) Making Earth System Data Records for Use in Research Environments (MEaSUR…
View article: Using a portable FTIR spectrometer to evaluate the consistency of Total Carbon Column Observing Network (TCCON) measurements on a global scale: the Collaborative Carbon Column Observing Network (COCCON) travel standard
Using a portable FTIR spectrometer to evaluate the consistency of Total Carbon Column Observing Network (TCCON) measurements on a global scale: the Collaborative Carbon Column Observing Network (COCCON) travel standard Open
To fight climate change, it is crucial to have a precise knowledge of greenhouse gas (GHG) concentrations in the atmosphere and to monitor sources and sinks of GHGs. On global scales, satellites are an appropriate monitoring tool. For the …