1 / 16

Assimilation and validation

Assimilation and validation. Martin Juckes, BADC. ACE-FTS.

barrett-kennedy
Télécharger la présentation

Assimilation and validation

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. Assimilation and validation Martin Juckes, BADC

  2. ACE-FTS ACE-FTS is the main instrument on SCISAT-1. It is a high spectral resolution (0.02 cm-1) Fourier Transform Spectrometer (FTS) operating from 2.2 to 13.3 µm (750-4400 cm-1) with a Michelson interferometer that was custom designed and built by ABB-Bomem.

  3. Background: MIPAS vs. ACE-FTS Wang et al. (2007; ACP) show mean differences between ACE-FTS and MIPAS HNO3 of around 0.5ppbv, standard deviation around 1.

  4. Wang et al. – MIPAS vs. Odin The MIPAS – Odin differences are generally larger than the MIPAS – ACEFTS differences.

  5. Validation of assimilated fields Blue: HIRDLS, Green: ACE-FTS, Orange: MLS-AURA

  6. 500K Mean differences from assimilaton and standard deviation in 6 latitude bands and 12 months.

  7. 650K and 850K

  8. Equivalent latitude means (a) (b) (a) HIRDLS, (b) MLS-AURA

  9. (b) (a) (a) HIRDLS, (b) MLS-AURA

  10. Odin SMR (Orsolini et al., 2008, ACPD)

  11. N. hemisphere, 650K HIRDLS, HNO3 ECMWF, PV MLS-AURA, HNO3

  12. Closing remarks • Validation against ACE-FTS gives reasonable results: detailed analysis still needs to be done • The annual cycle is markedly different from that obtained by Orsolini et al. from ODIN SMR data, but consistent with MLS-AURA • Evolution of large scale structures broadly consistent with potential vorticity evolution

More Related