1 / 5

University of Utah Group- TCSP and NAMMA

University of Utah Group- TCSP and NAMMA. Ed Zipser (PI), Zhaoxia Pu (co-PI) and Chuntao Liu, Brandon Kerns, Kantave Greene. Big Question: What is the essential difference between developing and non-developing [African] waves?

fuentez
Télécharger la présentation

University of Utah Group- TCSP and NAMMA

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. University of Utah Group- TCSP and NAMMA Ed Zipser (PI), Zhaoxia Pu (co-PI) and Chuntao Liu, Brandon Kerns, Kantave Greene Big Question: What is the essential difference between developing and non-developing [African] waves? • Is it sufficient to have “strong enough” synoptic-scale vorticity maxima in the waves? Mid-level or low level? • Is it sufficient to have a few strong convective bursts to concentrate the vorticity on smaller scales? • Given both, is development inevitable? • Challenge in NAMMA: Synoptic scale, mesoscale, and convective scale data for analysis and numerical experimentation for these questions.

  2. All non-developing vorticity maxima, Jun-Oct.1998-2001, mid-levels (700/600 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X All non-developing vorticity maxima, Jun-Oct.1998-2001, low-levels (925/850 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X Message: No shortage of waves with substantial vorticity passing north and south of Cape Verdes at both low and mid-levels; (mid-level centers are often farther north)

  3. All developing vorticity maxima, Jun-Oct.1998-2001, mid-levels (700/600 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X All developing vorticity maxima, Jun-Oct.1998-2001, low-levels (925/850 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X Message: Almost all developing systems will pass south of Cape Verdes, even at mid-levels. (This is not conventional wisdom-- is ERA40 getting it right?)

  4. All non-developing vorticity maxima, Jun-Oct.1998-2001, low-levels (925/850 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X All developing vorticity maxima, Jun-Oct.1998-2001, low-levels (925/850 hPa) (Colors represent relative vorticity (x 10-6s-1) ERA40, 1.125° X Message: Most systems weaken in longitude of Cape Verdes, except for a small fraction of systems passing to the south. What distinguishes the successful ones?

More Related