1 / 6

Simulated and observed geopotential height and temperature changes

Simulated and observed geopotential height and temperature changes. Simulated wind change (ms -1 ): October. November. Strengthened stratospheric jet. December. January. Poleward shift in tropospheric jet. EP-flux divergence (Pa): October. November. Reduced convergence. December.

reesed
Download Presentation

Simulated and observed geopotential height and temperature changes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Simulated and observed geopotential height and temperature changes

  2. Simulated wind change (ms-1): October November Strengthened stratospheric jet December January Poleward shift in tropospheric jet

  3. EP-flux divergence (Pa): October November Reduced convergence December January Dipole in wave forcing Enhanced convergence

  4. Changes in stratospheric wave driving EP-flux convergence averaged above 100 hPa, poleward of 45˚S in the control and depleted ozone integrations. The peak wave driving associated with the final warming is delayed by ~1 month.

  5. Santer et al. (2004) results Time series of global mean, monthly mean anomalies in lower stratospheric temperatures (MSU T4). Results are processed MSU T4 measurements (UAH, RSS) and synthetic T4 temperatures calculated from NCEP-50, ERA-40, and the ensemble mean of the PCM ALL experiment. PCM has T42 resolution with 18 levels.

  6. Stratospheric temperature changes in reanalyses and PCM. Least squares linear trends over 1979–2001 in monthly mean processed or synthetic MSU T4 temperatures from ERA-40 (a), RSS (b), UAH (c), and NCEP-50 (d). Also shown are T4 trends over 1979–1999 in the ensemble mean of the PCM ALL experiment (e) (Santer et al., 2004).

More Related