North Atlantic Oscillation winter index reconstructed from Lamb weather types over 1781-1996

A winter (DJFM) North Atlantic Oscillation index (NAOi) has been reconstructed over the peridod 1781-1996 by calibrating the winter frequencies of Lamb weather types to the winter PC-based NAOi of Hurrell (1995, doi:10.1126/science.269.5224.676). The data file contains 4 columns: year of JFM, NAOi,...

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Bibliographic Details
Main Author: Delaygue, Gilles
Format: Dataset
Language:English
Published: PANGAEA 2018
Subjects:
DATE/TIME
Days
cumulated
North Atlantic Ocean Index
Uncertainty
North Atlantic
North Atlantic oscillation
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.896306
https://doi.org/10.1594/PANGAEA.896306
Description
Summary:A winter (DJFM) North Atlantic Oscillation index (NAOi) has been reconstructed over the peridod 1781-1996 by calibrating the winter frequencies of Lamb weather types to the winter PC-based NAOi of Hurrell (1995, doi:10.1126/science.269.5224.676). The data file contains 4 columns: year of JFM, NAOi, uncertainty (1 std), number of unclassified days over this winter. The NAOi has no unit since regressed to a normalised index. Note that this index has not been renormalised (to an average value of zero and standard deviation of 1). The number of unclassified days directly affects the reliability and consistency of the NAOi. For instance, Delaygue et al. (2018) require less than 24 unclassified days per winter to consider the NAOi.

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