TY - JOUR
T1 - Oceanic El-Niño wave dynamics and climate networks
AU - Wang, Yang
AU - Gozolchiani, Avi
AU - Ashkenazy, Yosef
AU - Havlin, Shlomo
N1 - Publisher Copyright:
© 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
PY - 2016/3/11
Y1 - 2016/3/11
N2 - The so-called El Niño-southern oscillation (ENSO) is the most important and influential climate phenomenon of contemporary climate variability, in which oceanic wave dynamics plays an important role. Here we develop and apply an approach based on network theory to quantify the characteristics of El-Niño related oceanic waves using the satellite dataset. Weassociate the majority of dominant long distance (≤500 km) links of the network with several kinds of oceanic waves, i.e. equatorial Kelvin, Ross by, and tropical instability waves. Notably, we find that the location of the outgoing (∼180°E) and in-coming hubs (∼140°W) of the climate network coincide with the locations of The wave initiation and dissipation, respectively. We also find that this dissipation at ∼140°Wismuch weaker during El-Niño times. Moreover, the hubs of the equatorial network agree with the locations of westerly wind burst activity and high wind vorticity, two mechanisms that were associated with Ross by waves activity. This novel quantification method that is directly based on observational data leads to a better understanding of the oceanic wave dynamics, and it can also improve our understanding of El-Niño dynamics or its prediction.
AB - The so-called El Niño-southern oscillation (ENSO) is the most important and influential climate phenomenon of contemporary climate variability, in which oceanic wave dynamics plays an important role. Here we develop and apply an approach based on network theory to quantify the characteristics of El-Niño related oceanic waves using the satellite dataset. Weassociate the majority of dominant long distance (≤500 km) links of the network with several kinds of oceanic waves, i.e. equatorial Kelvin, Ross by, and tropical instability waves. Notably, we find that the location of the outgoing (∼180°E) and in-coming hubs (∼140°W) of the climate network coincide with the locations of The wave initiation and dissipation, respectively. We also find that this dissipation at ∼140°Wismuch weaker during El-Niño times. Moreover, the hubs of the equatorial network agree with the locations of westerly wind burst activity and high wind vorticity, two mechanisms that were associated with Ross by waves activity. This novel quantification method that is directly based on observational data leads to a better understanding of the oceanic wave dynamics, and it can also improve our understanding of El-Niño dynamics or its prediction.
KW - El-Niño
KW - climate networks
KW - complex networks
KW - complex systems
KW - fluid dynamics
UR - http://www.scopus.com/inward/record.url?scp=84960942910&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/18/3/033021
DO - 10.1088/1367-2630/18/3/033021
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AN - SCOPUS:84960942910
SN - 1367-2630
VL - 18
JO - New Journal of Physics
JF - New Journal of Physics
IS - 3
M1 - 033021
ER -