Posted on 01/06/2016 8:16:00 AM PST by Oldeconomybuyer
Scientists say cyclical changes in the Pacific Ocean have thrown Earthâs surface into what may be an unprecedented warming spurt, following a global warming slowdown that lasted about 15 years.
While El Niño is being blamed for an outbreak of floods, storms and unseasonable temperatures across the planet, a much slower-moving cycle of the Pacific Ocean has also been playing a role in record-breaking warmth. The recent effects of both ocean cycles are being amplified by climate change.
A 2014 flip was detected in the sluggish and elusive ocean cycle known as the Pacific Decadal Oscillation, or PDO, which also goes by other names, including the Interdecadal Pacific Oscillation. Despite uncertainty about the fundamental nature of the PDO, leading scientists link its 2014 phase change to a rapid rise in global surface temperatures.
The approximately 15-year warming slowdown was linked to the negative phase of the PDO, which is also called its cool phase.
(Excerpt) Read more at theguardian.com ...
“What may be” are the key words here...since they indicate that it may NOT be as well. Will be is one thing; maybe is quite another.
The ocean cannot warm the atmosphere without cooling itself.
So are the Paris accords going to address the PDO? When El Nino goes away this Summer watch the temperatures start to go sown. What percentage of Scientists attribute GW to the PDO? Notice that the article admits to the 15 tear lull in GW.
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Great point.
I love when writers prove they know nothing by statements like that. The reason that negative PDO is called "cool" is it results in temporarily cooler temperatures in much of North America. But there are two other things negative PDO causes:
1. Global warming (for the most part)
2. Large amounts of heat transferred through the Bering Strait and via teleconnections into the Arctic where it melts the ice.
Since we have seen only modest warming, we can pretty much say that manmade warming is pretty minor since there was also potential added warming from negative PDO to some unknowable extent.
The important thing to remember is that the effects are not linear or constant. At first negative PDO delivers some global cooling. But that turns into global warming over the longer run of negative PDO. The reason is pictured above, mainly surface warming effects for the planet as a whole.
Anecdotes mean very little. In my area, we are at record heat levels. We are hitting the 80's this week. It hasn't been this warm here at this time of year, definitely warmer than usual. Does this have anything to do with AGW? Maybe not, but anecdotes in either direction dont mean anything.
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