1 / 13

CH2018

CH2018. Climatic changes in Switzerland over the last 300 years. Stefan Brönnimann, OCCR/Inst. Geography, University of Bern. Swiss Geoscience Meeting 2018. CH2018 – Swiss Climate since 1700. Outline. Reconstructions Temperature Precipitation Wind storms. Instrumental Data.

cedricg
Download Presentation

CH2018

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. CH2018 Climatic changes in Switzerland over the last 300 years Stefan Brönnimann, OCCR/Inst. Geography, University of Bern Swiss Geoscience Meeting 2018

  2. CH2018 – Swiss Climate since 1700 Outline • Reconstructions • Temperature • Precipitation • Wind storms

  3. Instrumental Data CH2018 – Swiss Climate since 1700 Reconstruction methods

  4. Proxies CH2018 – Swiss Climate since 1700 Reconstruction methods

  5. Regression, Data Assimilation CH2018 – Swiss Climate since 1700 Reconstruction methods • Trachsel: Regression models • Bayesian framework for 30-yr uncertainty • Franke: Data Assimilation • Ensemble of 30 to determine uncertainty • 20th Centurry Reanylsis (ensemble of 56) for storms

  6. Annual series CH2018 – Swiss Climate since 1700 Summer temperature

  7. Summer temperature 30-yr moving average Far outside the rangeof the last 300 years CH2018 – Swiss Climate since 1700

  8. Inconclusive CH2018 – Swiss Climate since 1700 Summer precipitation

  9. Multidecadalvariability CH2018 – Swiss Climate since 1700 Winter wind storms

  10. CH2018 – Swiss Climate since 1700 Flood events • Atmospheric causes

  11. CH2018 – Swiss Climate since 1700 Everbody knew it all along

  12. CH2018 – Swiss Climate since 1700 Everbody knew it all along

  13. CH2018 – Swiss Climate since 1700 Conclusions • Unprecedented summer mean temperature • No cold summers anymore • Decadal variability of wind storms and flood events

More Related