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Stability of climate networks with time
Y Berezin1, A Gozolchiani, O Guez
1Department of Physics, Bar Ilan University, Ramat Gan, Israel. bereziny@gmail.com
Scientific Reports
|September 21, 2012
Summary
Climate fluctuations form a stable network pattern, surprisingly robust over time. This stability arises from geographical embedding and physical climate coupling, with less coupling near the equator.
Area of Science:
- Climate dynamics and atmospheric science.
- Network theory applications in geosciences.
Background:
- Daily climate fluctuations (temperature, geopotential height) exhibit unstable patterns.
- Existing models struggle to predict regional climate interaction stability.
Purpose of the Study:
- To investigate the surprising robustness of climate fluctuation network patterns.
- To identify the origins of this network stability.
- To analyze the influence of geographical and physical factors on climate network stability.
Main Methods:
- Development of a novel systematic methodology to analyze climate field fluctuations.
- Network analysis to quantify relationships between regional climate patterns.
- Decomposition of network stability into spatial embedding and physical coupling components.
Main Results:
- Observed climate fluctuations form a highly stable network pattern over time.
- Network stability is equally attributed to spatial 2D embedding and physical climate coupling.
- Physical coupling's contribution to stability is less pronounced near the equator.
- Altitude differences induce gradual, monotonic changes in the network pattern.
Conclusions:
- The robustness of climate interaction networks is a key feature of Earth's climate system.
- Both geometric (spatial embedding) and physical (coupling) factors are crucial for climate network stability.
- Equatorial and altitudinal variations significantly modulate climate network dynamics.
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