Category Archives: PDO

Update And Changes To NODC Ocean Heat Content Data

Guest Post by Bob Tisdale, As noted in the post October 2010 Update to NODC Ocean Heat Content Data, the National Oceanographic Data Center has updated itsOCEAN HEAT CONTENT (OHC) data. This is the dataset based on the Levitus et al (2009) … Continue reading

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Posted in AMO, ENSO, Oceans, PDO | 105 Comments

AMO+PDO= temperature variation – one graph says it all

Joe D’Aleo and Don Easterbrook have produced a new paper for SPPI. This graph of US Mean temperature versus the AMO and PDO ocean cycles is prominently featured: I particularly liked the regression forecast fit:

Posted in AMO, Climate data, Oceans, PDO | 143 Comments

Ocean cooling contributed to mid-20th century global warming hiatus (and so did the PDO)

NOTE: As is typical these days, and in keeping with co-author Phil Jones tradition of not giving up anything, the publicly funded scientific paper is not included with the news, and is hidden behind a paywall. All we can get … Continue reading

Posted in Oceans, PDO | 192 Comments

The North Pacific & Solar Cycle Change

Guest post by Paul Vaughan, M.Sc. Awhile back I drew attention to temporal patterns shared by the <i>rate of change</i> of solar cycle length (SCL’) and the Atlantic Multidecadal Oscillation (AMO). (See here.) Correspondence I received later alerted me to … Continue reading

Posted in PDO, Sea Surface Temperature | 100 Comments

Connecting ENSO, PDV, and the North and South Pacific

A new paper in Geophysical Research Letters was brought to my attention by Dr. Leif  Svalgaard. Tropical origins of North and South Pacific decadal variability by Jeremy D. Shakun and Jeffrey Shaman makes some very interesting findings suggesting that both … Continue reading

Posted in ENSO, Oceans, PDO | 67 Comments

California Wildfires caused by cooler Pacific, La Niña

California’s Fires Result of a Cooling Pacific, Two Years of La Niña and Environmental Mismanagement Guest Post By Joseph D’Aleo, CCM, ICECAP While environmentalists and clueless politicans like CA Representative Linda Sanchez and not surprisingly Climate Progress’ Joe Romm sought … Continue reading

Posted in ENSO, Oceans, PDO | 85 Comments

Study: Ocean net heat flow is connected with climate shifts – CO2 not correlated – no “warming in the pipeline”

Related to this story: The Pacific Decadal Oscillation Time Series from the University of Washington, seen below. Emphasis points mine. h/t to WUWT reader Richard Heg. – Anthony Monthly Values for the PDO Index, January 1900 to September 2008. Positive … Continue reading

Posted in Oceans, PDO | 112 Comments

Ocean heat content and Earth’s radiation imbalance

This paper is to be published on-line on Friday in Physics Letters A Dr. Douglas graciously sent me an advance copy, of which I’m printing some excerpts. Douglas and Knox show some correlations between Top-of-atmosphere radiation imbalance and the Pacific … Continue reading

Posted in Climate_change, Earth, PDO, Science | 436 Comments

La Niña fading, El Niño may soon return

Source: Bill Illis writes in comments: The newest Ocean SST map shows the La Nina conditions have gone away and we are in slightly positive ENSO conditions. Also interesting is that the negative PDO seems to be moving back … Continue reading

Posted in ENSO, Oceans, PDO | 113 Comments

PDO — ENSO, Aleutian Low, or some of each?

PDO — ENSO, Aleutian Low, or some of each? Guest Post by Basil Copeland Introduction In a recent post here at WUWT, as well as on his own blog, Bob Tisdale challenged the popular view that the Pacific Decadal Oscillation … Continue reading

Posted in ENSO, Oceans, PDO | 61 Comments

Misunderstandings about the Pacific Decadal Oscillation

Misunderstandings about the Pacific Decadal Oscillation Guest post by Bob Tisdale INITIAL NOTE The first version of this post (The Common Misunderstanding About The PDO dated June 26, 2008) incorrectly described the method for calculating the Atlantic Multidecadal Oscillation. I … Continue reading

Posted in ENSO, Oceans, PDO | 115 Comments

The 1998 Super El Niño: possibly a “rogue wave”?

In comments on WUWT, people often think freely and throw out all sorts of ideas. Like in any collection of people, some are bad, some are average, a few are good, and even fewer are noteworthy. However, one that was … Continue reading

Posted in Earth, ENSO, Oceans, PDO, Science | 148 Comments

Fear and Loathing For California

Guest post by Steven Goddard On the same day when President Obama and Prime Minister Brown separately warned of imminent economic catastrophe, the new US Energy Secretary Dr. Steven Chu issued a different catastrophe warning.   The LA Times quoted him saying ““I … Continue reading

Posted in ENSO, PDO, Weather | 304 Comments

Looking more like La Nina every day

Click for larger image Source: h/t Arthur Glass About a month ago I posted: La Nina is back…and was criticized by a few folks. Well compare the above to the image from that post below:

Posted in PDO | 136 Comments

Don Easterbrook’s AGU paper on potential global cooling

Don sent me his AGU paper for publication and discussion here on WUWT, and I’m happy to oblige – Anthony Abstracts of American Geophysical Union annual meeting, San Francisco  Dec., 2008 Solar Influence on Recurring Global, Decadal, Climate Cycles Recorded … Continue reading

Posted in Climate_change, PDO, Science | 140 Comments


While I said a couple of days a go that “La Nina is back” it appears I mistook a strong PDO cool signature for the La Nina signature. As JPL’s Patzert says in the article below “This multi-year Pacific Decadal … Continue reading

Posted in Climate_change, PDO, Science, Sea level | 94 Comments