Correction of atmospheric scattering effects in space-based observations of methane and carbon dioxide: model study for synthesized GOSAT spectra

2008 ◽  
Author(s):  
Andrey Bril ◽  
Sergey Oshchepkov ◽  
Tatsuya Yokota
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Scattering ◽  
Model Study ◽  
Scattering Effects

scholarly journals How important are Southern Hemisphere wind changes for low glacial carbon dioxide? A model study

2008 ◽  
Vol 23 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
T. Tschumi ◽  
F. Joos ◽  
P. Parekh
Keyword(s):  
Carbon Dioxide ◽  
Southern Hemisphere ◽  
Model Study

scholarly journals Importance of the mixed-phase cloud distribution in the control climate for assessing the response of clouds to carbon dioxide increase: a multi-model study

2006 ◽  
Vol 27 (2-3) ◽  
pp. 113-126 ◽  
Author(s):  
Yoko Tsushima ◽  
S. Emori ◽  
T. Ogura ◽  
M. Kimoto ◽  
M. J. Webb ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Mixed Phase ◽  
Control Climate ◽  
Model Study

Based on Decoupling Model Study Low-Carbon Economic Development in Tianjing Industry

2013 ◽  
Vol 448-453 ◽  
pp. 4524-4529
Author(s):  
Qing Min Yuan ◽  
Shao Yu Zheng
Keyword(s):  
Carbon Dioxide ◽  
Industrial Cluster ◽  
Low Carbon ◽  
Industrial Emissions ◽  
Industry Cluster ◽  
Industry Growth ◽  
Model Study ◽  
Decoupling Analysis ◽  
Concentration Degree ◽  
The Relationship

Based on the elastic decoupling analysis framework, using the IPCC recommended the calculation method of the carbon dioxide and LQ, calculated Tianjin industrial emissions of carbon dioxide from 2000 to 2010.It creatively brings in the industry cluster elastic decoupling factor, builds a new elastic decoupling causality chain and analyzes the relationship among the factors in the chain. It is that Tianjin industrial decoupling elastic strength followed by decoupling industrial cluster elasticity, decoupling emission elasticity, energy decoupling of flexibility. Decoupling of energy consumption flexibility in addition to the 2009-2010 after expanding hook and expand outside connection, is weak. Decouple emission elasticity, except for expansion after 2001 hook, the rest are in strong decoupling or weak decoupling. Industrial cluster elastic appear fluctuation condition, the overall trend to strong decoupling for weak decoupling, industrial concentration degree increases, the industry growth obvious advantages, the scale showed a trend of fluctuations decrease, manifests the high and new technology's influence on the industrial cluster development. According to the results of research, Tianjin industrial low carbon routing and the relevant countermeasures will be promoted.

scholarly journals Atmospheric scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature

2017 ◽  
Vol 122 (7) ◽  
pp. 7654-7669 ◽  
Author(s):  
Brian. J. Harding ◽  
Jonathan J. Makela ◽  
Jianqi Qin ◽  
Daniel J. Fisher ◽  
Carlos R. Martinis ◽  
...  
Keyword(s):  
Vertical Wind ◽  
Horizontal Wind ◽  
Atmospheric Scattering ◽  
Scattering Effects

scholarly journals The potential of clear-sky carbon dioxide satellite retrievals

2015 ◽  
Vol 8 (12) ◽  
pp. 13039-13072
Author(s):  
R. R. Nelson ◽  
C. W. O'Dell ◽  
T. E. Taylor ◽  
L. Mandrake ◽  
M. Smyth
Keyword(s):  
Carbon Dioxide ◽  
Near Infrared ◽  
Retrieval Algorithm ◽  
Genetic Optimization ◽  
Infrared Observations ◽  
Clear Sky ◽  
Aerosol Scattering ◽  
Scattering Effects ◽  
Thin Cloud ◽  
Rms Errors

Abstract. Since the launch of the Greenhouse Gases Observing Satellite (GOSAT) in 2009, retrieval algorithms designed to infer the column-averaged dry-air mole fraction of carbon dioxide (XCO2) from hyperspectral near-infrared observations of reflected sunlight have been greatly improved. They now generally include the scattering effects of clouds and aerosols, as early work found that absorption-only retrievals, which neglected these effects, often incurred unacceptably large errors, even for scenes with optically thin cloud or aerosol layers. However, these "full-physics" retrievals tend to be computationally expensive and may incur biases from trying to deduce the properties of clouds and aerosols when there are none present. Additionally, algorithms are now available that can quickly and effectively identify and remove most scenes in which cloud or aerosol scattering plays a significant role. In this work, we test the hypothesis that non-scattering, or "clear-sky", retrievals may perform as well as full-physics retrievals for sufficiently clear scenes. Clear-sky retrievals could potentially avoid errors and biases brought about by trying to infer properties of clouds and aerosols when none are present. Clear-sky retrievals are also desirable because they are orders of magnitude faster than full-physics retrievals. Here we use a simplified version of the Atmospheric Carbon Observations from Space (ACOS) XCO2 retrieval algorithm that does not include the scattering and absorption effects of clouds or aerosols. It was found that for simulated Orbiting Carbon Observatory-2 (OCO-2) measurements, the clear-sky retrieval had errors comparable to those of the full-physics retrieval. For real GOSAT data, the clear-sky retrieval had nearly indistinguishable error characteristics over land, but roughly 30–60 % larger errors over ocean, depending on filtration level, compared to the full-physics retrieval. In general, the clear-sky retrieval had XCO2 root-mean-square (RMS) errors of less than 2.0 ppm when adequately filtered through the use of the Data Ordering through Genetic Optimization (DOGO) system. These results imply that non-scattering XCO2 retrievals are potentially much more accurate than previous literature suggests, when employing filtering methods to remove measurements in which scattering can cause significant errors. Additionally, the computational benefits of non-scattering retrievals means they may be useful for certain applications that require large amounts of data but have less stringent error requirements.

scholarly journals Atmospheric scattering effects on ground-based measurements of thermospheric winds

1983 ◽  
Vol 31 (3) ◽  
pp. 303-310 ◽  
Author(s):  
V.J. Abreu ◽  
G.A. Schmitt ◽  
P.B. Hays ◽  
J.W. Meriwether ◽  
C.A. Tepley ◽  
...  
Keyword(s):  
Atmospheric Scattering ◽  
Scattering Effects ◽  
Thermospheric Winds
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