CDG-hosted-4839 | Climate Data Guide

Dataset Name

DJFM Northern Annular Mode Index (SLP-Based)

Metadata Identifier

CDG-hosted-4839

Start Date

1899-01-01

End Date

2021-03-01

Climate data guide content with tag CDG-hosted-4839

Hurrell wintertime SLP-based Northern Annular Mode (NAM) Index

Years of record

1899-01 to 2024-03

The NAM (or Arctic Oscillation) is defined as the first EOF of NH (20°-90°N) winter SLP data. It explains 23% of the extended winter mean (December-March) variance, and it is clearly dominated by the NAO structure in the Atlantic sector. Although there are some subtle differences from the NAO regional pattern over the Atlantic and Arctic (see Figure 1 below), the main…
Main variables and Earth System components
Atmosphere Sea Level Pressure
Formats

ascii

Timestep

Seasonal

Domain

Atlantic Ocean, NH - Northern Hemisphere, Pacific Ocean

Collections

N/A
Experts contributing reviews

Phillips, Adam

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