aura in a historical context
Download
Skip this Video
Download Presentation
Aura in a Historical Context

Loading in 2 Seconds...

play fullscreen
1 / 1

Aura in a Historical Context - PowerPoint PPT Presentation


  • 60 Views
  • Uploaded on

(a). (b). (c). (d). Aura in a Historical Context. Long-term time-series of HCl and Cl y.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Aura in a Historical Context' - ramona-harmon


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
aura in a historical context
(a)

(b)

(c)

(d)

Aura in a Historical Context

Long-term time-series of HCl and Cly

  • Knowledge of the distribution of inorganic chlorine Cly in the stratosphere is needed to attribute changes in stratospheric ozone to changes in halogens, and to assess the realism of chemistry-climate models. However, there are limited direct observations of Cly. Simultaneous measurements of the major inorganic chlorine species are rare. In the upper stratosphere, Cly can be inferred from HCl alone.
  • Inter-instrument biases are inevitable. We have developed a framework for their detection and correction. Figure (a) shows an example of how Aura MLS HCl (blue) is biased relative to UARS HALOE HCl (red). This has been corrected in Figure (b) using a neural network.
  • By again using a neural network we can use the periods when we do have observations of Cly together with the long-term record of HCl to infer a long-term record of Cly with an associated uncertainty. Figures (c) and (d) show examples of this.
ad