Warning: INSERT command denied to user 'dbo256360593'@'' for table 'watchdog' query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:404:\"INSERT command denied to user 'dbo256360593'@'' for table 'captcha_sessions'\nquery: INSERT into captcha_sessions (uid, sid, ip_address, timestamp, form_id, solution, status, attempts) VALUES (0, '7a32ffce8b23ed9dd7070e716a9d6f22', '', 1579720678, 'user_login_block', '9236027d1027cdfcee5a2c3903f9a97e', 0, 0)\";s:5:\"%file\";s:88:\"/homepages/45/d175009339/htdocs/tahoetowhitney.org/sites/all/modules/captcha/captcha.inc\";s: in /homepages/45/d175009339/htdocs/tahoetowhitney.org/includes/database.mysqli.inc on line 134
No Evidence that Atlantic and Pacific Oscillations Exist

No Evidence that Atlantic and Pacific Oscillations Exist

Alex Wierbinski's picture

By Alex Wierbinski - Posted on 04 January 2020


Atlantic and Pacific Oscillations Lost in the Noise,
Penn State, January 3, 2020.


PDO Does Not Exist
"The Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) do not appear to exist..."

"Using both observational data and climate model simulations, the researchers showed that there was no consistent evidence for decadal or longer-term internal oscillatory signals that could be differentiated from climatic noise -- random year to year variation."

No PDO Evidence
"Given the current sophistication of climate models as seen in their ability to capture the El Niño/Southern Oscillation, we would expect to see consistent evidence for oscillations across a suite of climate models... We found no such evidence."

"...we found no other signals, no Pacific or Atlantic climate variability on decadal or longer timescales that could be characterized as a true oscillation. Such variability was essentially indistinguishable from random noise."

Killing the AMO
Atlantic Multidecadal Oscillation
Observing Our Own Massive Effects
"...the researchers showed that the apparent 40 to 50 year spectral peak sometimes associated with the AMO is actually an artifact of the slowdown in warming from the 1950s to 1970s. This warming was due to the buildup of sulfur "aerosol" pollutants that cool the Earth's surface. The passage of the Clean Air Acts in the 1970s removed the cooling effect and greenhouse gas warming increasingly dominated. The slowdown and subsequent acceleration of warming masquerades as an apparent "oscillation."

Human Created Weather Fluctuations
"Our study provides another line of evidence that purported decadal and longer timescale internal oscillation in climate that have been identified through analysis of observational data are in fact mostly a result of external influences like greenhouse gas and (changing) aerosol emissions by humans."


March 2019
HIGH SIERRA WEATHER Theory and Practices: ENSO, the MJO, and the PDO


Dec 2019
Warming Waters Making Pacific Decadal Oscillation, the "PDO," Less Predictable


Jan 2019
The Madden-Julian Oscillation Changing in Warming World





News of Fish, Oceans, Ice, Water, & Man, Winter and Spring of 2020

News of Man & Nature, January 2020








Nature News


Climate Destruction News



Bee News

Bear News

Spider Forum

Bird News

Small Mammals

Frogs and Reptiles

Butterfly News


Health and Fitness

Mountain Safety

Mosquito News

Female Trail

High Sierra History


Astro-Phys, Space, & Science News

High Sierra Geology News

Fish, Oceans, & Water News






research, disproves, Atlantic Multidecadal Oscillation, AMO, Pacific Decadal Oscillation, PDO


Powered by Drupal, an open source content management system

Latest News: RSS FEED

Syndicate content

Support Tahoe to Whitney

The Tahoe to Whitney Trail Guide and Magazine are walked, written, funded, and supported by my efforts, with the help of kindred spirits and my sister.

We offer valuable Trail Guide, Skills, Weather, News and Analysis.

My goal is to get you out to see your natural and social potential. Help me keep this unique resource accessible and expanding towards its potential. We've a lot of miles to cover ahead...

If you feel these efforts are valuable, I'm cordially inviting you to support them, here:



I am currently working towards publishing the completed guide between Tahoe & Yosemite as an e-book, while converting this "blog" to a fine magazine format. You will like the results! Help Tahoe to Whitney reach its potential!


Why Support Tahoe to Whitney?
Mission Statement

Warning: INSERT command denied to user 'dbo256360593'@'' for table 'watchdog' query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:405:\"INSERT command denied to user 'dbo256360593'@'' for table 'accesslog'\nquery: INSERT INTO accesslog (title, path, url, hostname, uid, sid, timer, timestamp) values('No Evidence that Atlantic and Pacific Oscillations Exist', 'node/2592', '', '', 0, '7a32ffce8b23ed9dd7070e716a9d6f22', 373, 1579720679)\";s:5:\"%file\";s:87:\"/homepages/45/d175009339/htdocs/tahoetowhitney.org/modules/statistics/statistics.module\& in /homepages/45/d175009339/htdocs/tahoetowhitney.org/includes/database.mysqli.inc on line 134