scholarly journals Separating the North and South Pacific Meridional Modes Contributions to ENSO and Tropical Decadal Variability

2019 ◽  
Vol 46 (2) ◽  
pp. 906-915 ◽  
Author(s):  
Giovanni Liguori ◽  
Emanuele Di Lorenzo
Keyword(s):  
Decadal Variability ◽  
South Pacific ◽  
The North ◽  
North And South

Tropical Pacific Decadal Variability and ENSO Precursor in CMIP5 Models

2021 ◽  
Vol 34 (3) ◽  
pp. 1023-1045
Author(s):  
Yingying Zhao ◽  
Emanuele Di Lorenzo ◽  
Daoxun Sun ◽  
Samantha Stevenson
Keyword(s):  
Decadal Variability ◽  
South Pacific ◽  
Tropical Pacific ◽  
Cmip5 Models ◽  
The North ◽  
Enso Teleconnections ◽  
Pacific Decadal Variability ◽  
Basin Scale ◽  
The Tropics ◽  
North And South

AbstractObservational analyses suggest that a significant fraction of the tropical Pacific decadal variability (TPDV) (~60%–70%) is energized by the combined action of extratropical precursors of El Niño–Southern Oscillation (ENSO) originating from the North and South Pacific. Specifically, the growth and decay of the basin-scale TPDV pattern (time scale = ~1.5–2 years) is linked to the following sequence: ENSO precursors (extratropics, growth phase) → ENSO (tropics, peak phase) → ENSO successors (extratropics, decay phase) resulting from ENSO teleconnections. This sequence of teleconnections is an important physical basis for Pacific climate predictability. Here we examine the TPDV and its connection to extratropical dynamics in 20 models from phase 5 of the Coupled Model Intercomparison Project (CMIP). We find that most models (~80%) can simulate the observed spatial pattern (R > 0.6) and frequency characteristics of the TPDV. In 12 models, more than 65% of the basinwide Pacific decadal variability (PDV) originates from TPDV, which is comparable with observations (~70%). However, despite reproducing the basic spatial and temporal statistics, models underestimate the influence of the North and South Pacific ENSO precursors to the TPDV, and most of the models’ TPDV originates in the tropics. Only 35%–40% of the models reproduce the observed extratropical ENSO precursor patterns (R > 0.5). Models with a better representation of the ENSO precursors show 1) better basin-scale signatures of TPDV and 2) stronger ENSO teleconnections from/to the tropics that are consistent with observations. These results suggest that better representation of ENSO precursor dynamics in CMIP may lead to improved Pacific decadal variability dynamics and predictability.

Freshwater and Heat Changes in the North and South Pacific Oceans between the 1960s and 1985–94

2001 ◽  
Vol 14 (7) ◽  
pp. 1613-1633 ◽  
Author(s):  
Annie P. S. Wong ◽  
Nathaniel L. Bindoff ◽  
John A. Church
Keyword(s):  
South Pacific ◽  
The North ◽  
The 1960S ◽  
North And South

C1-C4hydrocarbons in the North and South Pacific

Tellus ◽  
1974 ◽  
Vol 26 (1-2) ◽  
pp. 71-77 ◽  
Author(s):  
R. A. LAMONTAGNE ◽  
J. W. SWINNERTON ◽  
V. J. LINNENBOM
Keyword(s):  
South Pacific ◽  
The North ◽  
North And South
Sign in / Sign up

Export Citation Format

Share Document