IPO…Inter-decadal Pacific Oscillation

The IPO is a leading mode of sea surface temperatures (SSTs) seen mostly in the Pacific Ocean.

This interpretation of IPO by LONG PADDOCK
http://www.longpaddock.qld.gov.au/products/australiasvariableclimate/index.html

SOME OTHER TIME SERIES GRAPHS

“The interdecadal Pacific oscillation (IPO or ID) displays similar sea-surface temperature (SST) and sea-level pressure (SLP) patterns, with a cycle of 15–30 years, but affects both the north and south Pacific. In the tropical Pacific, maximum SST anomalies are found away from the equator. This is quite different from the quasi-decadal oscillation (QDO) with a period of 8-to-12 years and maximum SST anomalies straddling the equator, thus resembling the ENSO.”
http://en.wikipedia.org/wiki/Pacific_decadal_oscillation

Advertisement

Pacific Ocean Sea Level Anomaly

The Sea level anomaly is sometimes used to assess the state of ENSO.
Anomalous Sea levels in the west Pacific basin are associated with strong easterly trades banking ocean waters higher in the western basin
Anomalous sea levels in the east pacific are associated with weakening trades and waters sloshing back toward the east Pacific basin

PLEASE CLICK ON THE TITLE TO LOAD FURTHER INFORMATION AND POSTS ON THIS THEMEFOUND IN COMMENTS SECTION BELOW

EXAMPLE

source
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ocean/

ENSO..Pacific Ocean basin 2016_2015_2014

PLEASE CLICK ON THE TITLE TO LOAD ALL FURTHER ENTRIES IN THE COMMENTS SECTION BELOW

I was reading and article by Max Gongalez of weatherzone news
about the possibility of an El Nino in 2014
Article here
http://www.weatherzone.com.au/news/increasing-odds-for-el-nino-to-affect-australian-weather-late-2014/27106

EXTRACT

El Nino

(the warm phase) occurs when warmer than average sea surface temperatures (SSTs) prevail over the central and eastern equatorial Pacific Ocean (from late winter to late autumn),

accompanied by high atmospheric pressure over the western Pacific.

This high atmospheric pressure typically leads to lower than average rainfall over Australia during El Nino years.

La Nina

(cool phase) on the other hand, occurs when cooler than average SSTs prevail over the central and eastern equatorial Pacific.

This is accompanied by a low atmospheric pressure over the western Pacific,

thus typically bringing above average rainfall to mainland Australia during La Nina years.
——————————————————-

I thought l would follow this ENSO season by testing this hypothesis/ fact

I will post the global MSLP ( mean sea level pressure) anomalies in the Pacific every month and observe the changing surface MSLP anomaly pattern

The February 2014 MSLP anomalies show low pressure anomalies in both the east and west basin. Although there is a band of high pressure over Australia and the far west basin of the pacific

According to theory .. Low pressure in the east basin is a la Nina indicator

I’m not sure?
I thought low pressure was a symptom of warm SST anomalies..?

DATA SOURCE
http://www.bom.gov.au/cgi-bin/climate/cmb.cgi?page=top

—————————————————–

I will post MSLP updates each month for 2014 in the comments section below
Please click on the title to load the comments section if it is not there

—————————————————–
Follow ENSO 2014 forum here
http://forum.weatherzone.com.au/ubbthreads.php/topics/1225860/12016

CORAL SEA.. Ocean and Atmosphere Observations

http://en.wikipedia.org/wiki/Coral_Sea

Famous for its unpredictability in predicting cyclone tracks
——————————————————————–

SATELLITE IMAGES

http://www.goes.noaa.gov/sohemi/sohemiloops/shirgmscolw.html

http://www.goes.noaa.gov/sohemi/sohemiloops/shirgmscol.html

——————————————————————–
I will use the comment section of this post to record any observations of interest
Feel free to add information and comment
Scroll down to the end of page for comments. If they don’t appear try clicking the title of this post to load comments
cheers

PDO… Pacific Decadal oscillation

Information and knowledge about the PDO

Additional posts will be posted in comments section of this thread . IT MAY BE NECESSARY TO CLICK ON THE TITLE OF THIS POST TO VIEW FURTHER INFORMATION

ROY SPENCER has just completed and informative and pictorial article on the PDO
http://www.drroyspencer.com/global-warming-background-articles/the-pacific-decadal-oscillation/

PDO SPATIAL TEMPERATURE PATTERN

The PDO is a temperature signal / spatial pattern in the North Eastern Pacific basin

THE PHASE LENGTH OF PDO CYLE..TIME SERIES

About 30 yrs in each phase

CURENTLY ENTERING A NEGATIVE PHASE OF THE PDO SINCE about 2005?

GLOBAL SEA SURFACE TEMPERATURE ANOMALY 2019_2016-2015-2014-2013-

CLICK ON TITLE TO LOAD ALL ENTRIES BELOW..
I COLLECT SNAPS OF THE GLOBAL SEA TEMPERATURE ANOMALIES OVER TIME

http://weather.unisys.com/surface/sfc_daily.php?plot=ssn&inv=0&t=cur

22nd July 2014

JULY 7th 2014

MAY 21st 2014

APRIL 2014

22nd FEB 2014

1st DECEMBER 2013

2nd NOVEMBER 2013

5th OCTOBER 2013

AUGUST 2013

SOI…. Southern Oscillation Index

PLEASE CLICK ON THE TITLE TO LOAD ALL FURTHER ENTRIES BELOW

Definition from BOM

http://www.bom.gov.au/climate/current/soihtm1.shtml

 

“The Southern Oscillation Index, or SOI, gives an indication of the development and intensity of El Niño or La Niña events in the Pacific Ocean. The SOI is calculated using the pressure differences between Tahiti and Darwin.

Sustained negative values of the SOI lower than −7 often indicate El Niño episodes. These negative values are usually accompanied by sustained warming of the central and eastern tropical Pacific Ocean, a decrease in the strength of the Pacific Trade Winds, and a reduction in winter and spring rainfall over much of eastern Australia and the Top End.

Sustainted positive values of the SOI greater than +7 are typical of a La Niña episode. They are associated with stronger Pacific trade winds and warmer sea temperatures to the north of Australia. Waters in the central and eastern tropical Pacific Ocean become cooler during this time. Together these give an increased probability that eastern and northern Australia will be wetter than normal.

Technical details

There are a few different methods for calculating the SOI. The method used by the Australian Bureau of Meteorology is the Troup SOI which is the standardised anomaly of the Mean Sea Level Pressure difference between Tahiti and Darwin.”

 

CURRENT SOI.. 30 day moving average

source
http://www.bom.gov.au/climate/enso/

Long term time series

http://www.bom.gov.au/climate/influences/timeline/

2013 ..LA NINA spatial pattern

map and anomaly from UNISYS

LINKS

MONTHLY OCEAN BRIEFING BY NOAA
http://www.cpc.ncep.noaa.gov/products/GODAS/ocean_briefing.shtml#Tropical Pacific Ocean