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List of works by Ryoichi Imasu

A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) – Part 1: Offline forward and adjoint transport models

scientific article published in 2017

A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) – Part 2: Optimization scheme and identical twin experiment of atmospheric CO<sub>2</sub> inversion

scientific article published in 2017

A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0): 1. Off-line forward and adjoint transport models

A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0): 2. Optimization scheme and identical twin experiment of atmospheric CO<sub>2</sub> inversion

A Three-Dimensional Icosahedral Grid Advection Scheme Preserving Monotonicity and Consistency with Continuity for Atmospheric Tracer Transport

A development of cloud top height retrieval using thermal infrared spectra observed with GOSAT and comparison with CALIPSO data

article by Yu Someya et al published 3 May 2016 in Atmospheric Measurement Techniques

A posteriori calculation of δ18O and δD in atmospheric water vapour from ground-based near-infrared FTIR retrievals of H216O, H218O, and HD16O

scholarly article by N. V. Rokotyan et al published 18 August 2014 in Atmospheric Measurement Techniques

Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO<sub>2</sub> product (version 1) and validation of the UTLS CO<sub>2</sub> data using CONTRAIL measurements

Dust Aerosol Detection by the Modified CO₂ Slicing Method

scientific article published on 04 April 2019

Ground-based measurement of column-averaged mixing ratios of methane and carbon dioxide in the Sichuan Basin of China by a desktop optical spectrum analyzer

article

Imposing strong constraints on tropical terrestrial CO2fluxes using passenger aircraft based measurements

scientific article published in 2012

Method and results of retrieval of HDO/H 2 O in atmosphere from IMG/ADEOS and FTIR data

Method for Retrieval of the HDO/H2O Ratio Vertical Profile in the Atmosphere from Satellite Spectra Simultaneously Measured in Thermal and Near-IR Ranges

scientific article published in 2021

Observation of column-averaged molar mixing ratios of carbon dioxide in Tokyo

scientific article

Optimization of the Photon Path Length Probability Density Function-Simultaneous (PPDF-S) Method and Evaluation of CO₂ Retrieval Performance Under Dense Aerosol Conditions

scientific article published on 12 March 2019

Sensing HDO/H2O in the Ural’s atmosphere using ground-based measurements of IR solar radiation with a high spectral resolution

scientific article published in 2011

Sub-Daily Natural CO2 Flux Simulation Based on Satellite Data: Diurnal and Seasonal Pattern Comparisons to Anthropogenic CO2 Emissions in the Greater Tokyo Area

scientific article published on 24 May 2021

Validation of GOSAT SWIR XCO 2 and XCH 4 Retrieved by PPDF-S Method and Comparison with Full Physics Method

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