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Contributions to future stratospheric climate change: an idealized chemistry-climate model sensitivity study
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hurwitz, M. M. Braesicke, P. Pyle, J. A. |
| Copyright Year | 2010 |
| Description | Within the framework of an idealized model sensitivity study, three of the main contributors to future stratospheric climate change are evaluated: increases in greenhouse gas concentrations, ozone recovery, and changing sea surface temperatures (SSTs). These three contributors are explored in combination and separately, to test the interactions between ozone and climate; the linearity of their contributions to stratospheric climate change is also assessed. In a simplified chemistry-climate model, stratospheric global mean temperature is most sensitive to CO2 doubling, followed by ozone depletion, then by increased SSTs. At polar latitudes, the Northern Hemisphere (NH) stratosphere is more sensitive to changes in CO2, SSTs and O3 than is the Southern Hemisphere (SH); the opposing responses to ozone depletion under low or high background CO2 concentrations, as seen with present-day SSTs, are much weaker and are not statistically significant under enhanced SSTs. Consistent with previous studies, the strength of the Brewer-Dobson circulation is found to increase in an idealized future climate; SSTs contribute most to this increase in the upper troposphere/lower stratosphere (UT/LS) region, while CO2 and ozone changes contribute most in the stratosphere and mesosphere. |
| File Size | 1475557 |
| Page Count | 38 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100015392 |
| Archival Resource Key | ark:/13960/t1sf7rj9z |
| Language | English |
| Publisher Date | 2010-01-02 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Climate Change Sensitivity Analysis Ozone Depletion Carbon Dioxide Concentration Northern Hemisphere Geophysics Stratosphere Climate Models Sea Surface Temperature Mesosphere Southern Hemisphere Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
