1 / 7

P2.3 Short-term climate variability - Dynamics and Processes

P2.3 Short-term climate variability - Dynamics and Processes. Huw C. Davies, Conny Schwierz, Mischa Croci-Maspoli, Olivia Martius, Harald Sodemann. Research Focii Synoptic phenomena and event-based climatologies :

zed
Download Presentation

P2.3 Short-term climate variability - Dynamics and Processes

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. P2.3 Short-term climate variability - Dynamics and Processes Huw C. Davies, Conny Schwierz, Mischa Croci-Maspoli, Olivia Martius, Harald Sodemann • Research Focii • Synoptic phenomena and event-based climatologies: • Blocking Detection and Patterns of Climate Variability • Cyclones, Streamers, Waves and heavy weather • Tropospheric transport phenomena: • Saharan dust events in Swiss ice cores • Origin of water for Greenland precipitation

  2. Tropopause height anomaly Blocking Detection and Indices SLP anomaly dipole and Z500 ridge  traditional detection indices • 3dim PV-Index Schwierz et al., 2004, GRL

  3. PV Blocking climatology DJF (ERA40) APV APV* 13% 10% 5% 1% 1.6% 1.3% 0.7% 0.1% 476 events  3.5 per month 116 events  0.9 per month • Climatological assessment, temporal development • Relation to patterns of climate variability (e.g. NAO, PNA) Maspoli et al., 2005, to be submitted ;Scherrer et al., 2005, submitted

  4. tropopause PV-streamer Alps sea sea wind field Heavy Alpine Precipitation Case studies (e.g. Massacand et al., 1998): PV streamers associated with heavy Alpine precipitation NCCR: ERA40 streamer climatology and 1966-1999 rain obs climatology Linkage of most extreme (1%) precipitation with PV streamers  Are there precursors for heavy precipitation ?

  5. Climatological link between upper-level PV-streamers and heavy precipitation along the Alpine south-side (AS) [%] 33-yr composite of heavy precip PV-streamers On 73% of the most extreme 1% AS-precipitation days, a PV-streamer is present over western Europe (86% for autumn events) Martius et al., 2005, submitted

  6. October 2000 March 2000 Saharan dust in an ice core Sodemann et al., ACPD, 2005, submitted

  7. Moisture uptake regions NAO + NAO - 100 % 50 0 Precipitation (contours: 10, 20, 40, 60, 80 %) SST uptakes # 284.33K NAO- NAO+ 278.89K [K]

More Related