Reconciling North Atlantic climate modes: revised monthly indices for the East Atlantic and the Scandinavian patterns beyond the 20th century

Comas-Bru, Laia; Hernández, Armand

doi:https://doi.org/10.5194/essd-10-2329-2018

Articles | Volume 10, issue 4

https://doi.org/10.5194/essd-10-2329-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-10-2329-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 10, issue 4

Review article

|

21 Dec 2018

Review article |

| 21 Dec 2018

Reconciling North Atlantic climate modes: revised monthly indices for the East Atlantic and the Scandinavian patterns beyond the 20th century

Laia Comas-Bru and Armand Hernández

Supplement

https://doi.org/10.5194/essd-10-2329-2018-supplement

Data sets

Monthly EOF-based indices of NAO, EA and SCA indices covering the period from 1851 to present (Dataset 2); and compare them with their equivalent instrumental indices calculated as standarised sea-level press L. Comas-Bru and A. Hernández https://doi.org/10.1594/PANGAEA.892769

Short summary

This review presents new EOF-based monthly indices of the east Atlantic and the Scandinavian patterns covering the period from 1851 to present. The paper also includes a comparison with their analogous instrumental indices, provides insights into the reasons why different sources of data may give slightly different time series and demonstrates that using these patterns to explain climate variability beyond the winter season needs to be done carefully due to their non-stationary behaviour.