How does Pacific Decadal Oscillation affect climate?
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How does Pacific Decadal Oscillation affect climate?
The Pacific Decadal Oscillation is a sea surface temperature (SST) climate cycle (or teleconnection) describing sea surface temperature anomalies over the Northeastern Pacific Ocean. The PDO can influence the weather conditions across North America with characteristic patterns occurring at different times of the year.
How do oscillations contribute to the climate?
Climate oscillations are the naturally reoccurring changes of earth’s climate that are associated with the interactions of atmospheric and oceanic conditions and occur over different geographic scales and time periods.
What is linked to global warming?
Changes observed in Earth’s climate since the early 20th century are primarily driven by human activities, particularly fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere, raising Earth’s average surface temperature.
What are oceanic oscillations?
Ocean-atmosphere oscillations are naturally occurring cycles affecting sea surface temperature and precipitation. They are among the key reasons why some years are dry and plagued by drought while other years it rains incessantly resulting in widespread flooding.
What does the Pacific Decadal Oscillation do?
The Pacific Decadal Oscillation (PDO) is a long-term ocean fluctuation of the Pacific Ocean. The PDO waxes and wanes approximately every 20 to 30 years. From ocean surface topography data, together with other ocean and atmospheric data, scientists can determine whether we are in a ‘cool’ phase or a ‘warm’ phase.
What is the Pacific Decadal Oscillation defined by?
The Pacific Decadal Oscillation (PDO) is defined by the leading pattern (EOF) of sea surface temperature (SST) anomalies in the North Pacific basin (typically, polewards of 20°N).
What other oscillations patterns of change in the global ocean do you observe?
However, not all exert as strong an influence on global weather patterns, and some are even less regular than ENSO.
- Antarctic Oscillation (AAO)
- Arctic Oscillation (AO)
- Atlantic Multidecadal Oscillation (AMO)
- Indian Ocean Dipole (IOD)
- Madden-Julian Oscillation (MJO)
- North Atlantic Oscillation (NAO)
What is the Global Wind Oscillation?
The Global Wind Oscillation (GWO) describes the addition of tropical moisture and energies through atmospheric channels, which enhance the probability that storms can evolve into a state that favors tornado production.
What are the effects of El Niño in California and across the southern states?
In coastal Southern California and across the Southwest, El Niño conditions have had a strong effect in producing more frequent and higher magnitudes of insured losses, while La Niña conditions, the opposite of El Niño (when ocean temperatures are colder than normal), significantly reduce both the frequency and …
How does the negative phase of the Pacific Decadal Oscillation affect the climate of the Pacific Northwest?
The Asian Monsoon is also affected, increased rainfall and decreased summer temperature is observed over the Indian subcontinent during the negative phase….Temperature and precipitation.
| PDO Indicators | PDO positive phase | PDO negative phase |
|---|---|---|
| Pacific Northwest, British Columbia, and Alaska | Above average | Below average |