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Diagnosis of middle atmosphere climate sensitivity by the climate feedback response analysis method
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Aquila, Valentina Zhu, Xun Cai, Ming Talaat, Elsayed R. Swartz, William H. Yee, Jeng-Hwa Coy, Lawrence |
| Copyright Year | 2014 |
| Description | We present a new method to diagnose the middle atmosphere climate sensitivity by extending the Climate Feedback-Response Analysis Method (CFRAM) for the coupled atmosphere-surface system to the middle atmosphere. The Middle atmosphere CFRAM (MCFRAM) is built on the atmospheric energy equation per unit mass with radiative heating and cooling rates as its major thermal energy sources. MCFRAM preserves the CFRAM unique feature of an additive property for which the sum of all partial temperature changes due to variations in external forcing and feedback processes equals the observed temperature change. In addition, MCFRAM establishes a physical relationship of radiative damping between the energy perturbations associated with various feedback processes and temperature perturbations associated with thermal responses. MCFRAM is applied to both measurements and model output fields to diagnose the middle atmosphere climate sensitivity. It is found that the largest component of the middle atmosphere temperature response to the 11-year solar cycle (solar maximum vs. solar minimum) is directly from the partial temperature change due to the variation of the input solar flux. Increasing CO2 always cools the middle atmosphere with time whereas partial temperature change due to O3 variation could be either positive or negative. The partial temperature changes due to different feedbacks show distinctly different spatial patterns. The thermally driven globally averaged partial temperature change due to all radiative processes is approximately equal to the observed temperature change, ranging from 0.5 K near 70 km from the near solar maximum to the solar minimum. |
| File Size | 1784306 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150000789 |
| Archival Resource Key | ark:/13960/t5cc60t88 |
| Language | English |
| Publisher Date | 2014-08-26 |
| Access Restriction | Open |
| Subject Keyword | Mcfram Middle Atmosphere Cfram Damping Climate Cooling Carbon Dioxide Ozone Solar Cycles Thermal Energy Sensitivity Atmospheric Temperature Thermal Radiation Heating Feedback Infrared Radiation Solar Flux Radiative Forcing Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
