In:
Earth System Science Data, Copernicus GmbH, Vol. 10, No. 4 ( 2018-12-21), p. 2329-2344
Kurzfassung:
Abstract. Climate variability in the North Atlantic sector is commonly ascribed to the
North Atlantic Oscillation. However, recent studies have shown that taking
into account the second and third mode of variability (namely the East
Atlantic – EA – and the Scandinavian – SCA – patterns) greatly improves
our understanding of their controlling mechanisms, as well as their impact on
climate. The most commonly used EA and SCA indices span the period from 1950
to present, which is too short, for example, to calibrate palaeoclimate
records or assess their variability over multi-decadal scales. To tackle
this, here, we create new EOF-based (empirical orthogonal function) monthly
EA and SCA indices covering the period from 1851 to present, and compare them
with their equivalent instrumental indices. We also review and discuss the
value of these new records and provide insights into the reasons why
different sources of data may give slightly different time series.
Furthermore, we demonstrate that using these patterns to explain climate
variability beyond the winter season needs to be done carefully due to their
non-stationary behaviour. The datasets are available at
https://doi.org/10.1594/PANGAEA.892769.
Materialart:
Online-Ressource
ISSN:
1866-3516
DOI:
10.5194/essd-10-2329-2018
DOI:
10.5194/essd-10-2329-2018-supplement
Sprache:
Englisch
Verlag:
Copernicus GmbH
Publikationsdatum:
2018
ZDB Id:
2475469-9
