1 / 11

Space and Time Multiscale Analysis System A sequential data assimilation approach

Space and Time Multiscale Analysis System A sequential data assimilation approach. Yuanfu Xie, Steven Koch, Steve Albers Huiling Yuan and Brad Beechler Global Systems Division Earth System Research Laboratory. Resolvable Information for a Given Observation Network. Obse. r. vation.

zita
Télécharger la présentation

Space and Time Multiscale Analysis System A sequential data assimilation approach

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. Space and Time Multiscale Analysis SystemA sequential data assimilation approach Yuanfu Xie, Steven Koch, Steve Albers Huiling Yuan and Brad Beechler Global Systems Division Earth System Research Laboratory

  2. Resolvable Information for a Given Observation Network Obse r vation Longer wave Obse r vation Longer wave B ac k g r ound B ac k g r ound Difference on longer wave Difference on shorter wave

  3. STMAS STMAS is implemented in two steps. • It retrieves the resolvable observation information. • After the resolvable information retrieved, STMAS is reduced to a standard statistical variational analysis With long waves retrieved, STMAS deals with a localized error covariance, a banded matrix.

  4. Multigrid Technique Using the number of gridpoints to control the base functions.

  5. An idealized multiscale case Left: Mesonet surface stations; Right: An analysis function

  6. An idealized multiscale case (cont.)

  7. A single 3DVAR with different α 0.9 0.7 α=0.5 These analyses tend to approximate the truth:

  8. Different Implementations of STMAS Recursive filter Wavelet Multigrid

  9. FAA/MIT Boundary Detection Application

  10. STMAS for frontal boundary detection

  11. STMAS vs. HPC

More Related