Editing IPCC:AR6/Data/Glossary (section)

=== <span class="glossary-term">Pacific Decadal Oscillation</span> ===

<div class="glossary-working-groups">'''Working Groups:''' WGI</div>

<div class="glossary-longer-term">'''Full term:''' Pacific Decadal Oscillation (PDO)</div>

<div class="glossary-definition">'''Definition:''' The leading mode of variability obtained from decomposition in empirical orthogonal function of sea surface temperature over the North Pacific north of 20°N, and characterized by a strong decadal component. The positive phase of the PDO features a dipole of sea surface temperature anomalies in the North Pacific, with a cold lobe near the centre of the basin and extending westward along the Kuroshio, encircled by warmer conditions along the coast of North America and in the subtropics. A positive PDO is accompanied by an intensified Aleutian Low and an associated cyclonic circulation enhancement leading to teleconnections over the continents adjacent to the North Pacific. In the AR6 WGI report, the PDO is encapsulated within the definition and description of Pacific Decadal Variability (PDV). See also Section AIV.2.6 in Annex IV of the AR6 WGI report. From Wikipedia During a "warm", or "positive", phase, the west Pacific becomes cooler and part of the eastern ocean warms; during a "cool", or "negative", phase, the opposite pattern occurs.</div>
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<div id="Pacific_Decadal_Variability"></div>