Zobrazeno 1 - 10
of 128
pro vyhledávání: '"R. Imasu"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 8059-8079 (2023)
Light-absorbing black carbon (BC) aerosols strongly affect Earth's radiation budget and climate. This paper presents satellite retrieval of BC over India based on observations from the Cloud and Aerosol Imager-2 (CAI-2) on board the Greenhouse gases
Externí odkaz:
https://doaj.org/article/72f8f34890ac46e5a65fb661b4604cd0
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 309-321 (2020)
Hyperspectral thermal infrared sounders enable us to grasp the global behavior of minor atmospheric constituents. Ammonia, which imparts large impacts on the atmospheric environment by reacting with other species, is one of them. In this work, we pre
Externí odkaz:
https://doaj.org/article/cd9bae8210b34ce781b5dff7d38e98e0
Autor:
M. Ouchi, Y. Matsumi, T. Nakayama, K. Shimizu, T. Sawada, T. Machida, H. Matsueda, Y. Sawa, I. Morino, O. Uchino, T. Tanaka, R. Imasu
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 5639-5653 (2019)
A novel, practical observation system for measuring tropospheric carbon dioxide (CO2) concentrations using a non-dispersive infrared analyzer carried by a small helium-filled balloon (CO2 sonde) has been developed for the first time. Vertical profile
Externí odkaz:
https://doaj.org/article/5c2b743a69cc48478f6c1c25230943f0
Autor:
T. O. Sato, T. M. Sato, H. Sagawa, K. Noguchi, N. Saitoh, H. Irie, K. Kita, M. E. Mahani, K. Zettsu, R. Imasu, S. Hayashida, Y. Kasai
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 1653-1668 (2018)
We performed a feasibility study of constraining the vertical profile of the tropospheric ozone by using a synergetic retrieval method on multiple spectra, i.e., ultraviolet (UV), thermal infrared (TIR), and microwave (MW) ranges, measured from sp
Externí odkaz:
https://doaj.org/article/8561740e716b418e844fca477a43feb5
Autor:
N. Saitoh, S. Kimoto, R. Sugimura, R. Imasu, K. Shiomi, A. Kuze, Y. Niwa, T. Machida, Y. Sawa, H. Matsueda
Publikováno v:
Atmospheric Measurement Techniques, Vol 10, Pp 3877-3892 (2017)
CO2 observations in the free troposphere can be useful for constraining CO2 source and sink estimates at the surface since they represent CO2 concentrations away from point source emissions. The thermal infrared (TIR) band of the Thermal and Near
Externí odkaz:
https://doaj.org/article/6c7ceec3fa2c48c1aaadd31ee08c25e2
Autor:
Y. Niwa, Y. Fujii, Y. Sawa, Y. Iida, A. Ito, M. Satoh, R. Imasu, K. Tsuboi, H. Matsueda, N. Saigusa
Publikováno v:
Geoscientific Model Development, Vol 10, Pp 2201-2219 (2017)
A four-dimensional variational method (4D-Var) is a popular technique for source/sink inversions of atmospheric constituents, but it is not without problems. Using an icosahedral grid transport model and the 4D-Var method, a new atmospheric greenh
Externí odkaz:
https://doaj.org/article/621d714449e947d19ec523f8be60dbb7
Autor:
Y. Niwa, H. Tomita, M. Satoh, R. Imasu, Y. Sawa, K. Tsuboi, H. Matsueda, T. Machida, M. Sasakawa, B. Belan, N. Saigusa
Publikováno v:
Geoscientific Model Development, Vol 10, Iss 3, Pp 1157-1174 (2017)
A four-dimensional variational (4D-Var) method is a popular algorithm for inverting atmospheric greenhouse gas (GHG) measurements. In order to meet the computationally intense 4D-Var iterative calculation, offline forward and adjoint transport models
Externí odkaz:
https://doaj.org/article/40bec31cb5f447a3a6fd63a099273f14
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 5, Pp 1981-1992 (2016)
An algorithm based on CO2 slicing, which has been used for cirrus cloud detection using thermal infrared data, was developed for high-resolution radiance spectra from satellites. The channels were reconstructed based on sensitivity height information
Externí odkaz:
https://doaj.org/article/fc67af7625eb4947acde0cc5462a170d
Autor:
N. Saitoh, S. Kimoto, R. Sugimura, R. Imasu, S. Kawakami, K. Shiomi, A. Kuze, T. Machida, Y. Sawa, H. Matsueda
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 5, Pp 2119-2134 (2016)
The Thermal and Near Infrared Sensor for Carbon Observation (TANSO)–Fourier Transform Spectrometer (FTS) on board the Greenhouse Gases Observing Satellite (GOSAT) has been observing carbon dioxide (CO2) concentrations in several atmospheric layers
Externí odkaz:
https://doaj.org/article/bbe27a1a863c4c0bb407849fad0c252c
Autor:
P. Ricaud, B. Sič, L. El Amraoui, J.-L. Attié, R. Zbinden, P. Huszar, S. Szopa, J. Parmentier, N. Jaidan, M. Michou, R. Abida, F. Carminati, D. Hauglustaine, T. August, J. Warner, R. Imasu, N. Saitoh, V.-H. Peuch
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 20, Pp 11427-11446 (2014)
The space and time variabilities of methane (CH4) total column and upper tropospheric mixing ratios are analysed above the Mediterranean Basin (MB) as part of the Chemical and Aerosol Mediterranean Experiment (ChArMEx) programme. Since the analysis o
Externí odkaz:
https://doaj.org/article/2640ef7441a348458c7420f5417f1e5e