Image

About…….. the Southern Hemisphere Annular Mode (SAM) Index

CLICK ON THE TITLE TO LOAD ALL FURTHER ENTRIES AT THE BASE OF THIS PAGE

SAM ( southern annular mode) Also referred to as the Antarctic Oscillation ( AAO )

TIME SERIES

The SAM was trending positive from 1965 to 1999

SAM 1960 to 2010

SOME LINKS AND RESOURCES TO UNDERSTANDING THE SOUTHERN ANNULAR MODE
I will add to this list in the future
Feel free to post a comment on any information and links on the SAM.

TIME SERIES
http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/aao/month_aao_index.shtml
SAM time series

Of particular interest in the graph below …!!
is the hockey stick curve of positive SAM in the winter season data.

Since 2007/2008 the SAM has climbed ‘exponentially toward 2010.!!!

Notice this extreme positive phase is a seasonal anomaly for the SH winter period of JUNE/JULY/AUGUST.

In fact the summer and annual anomaly has levelled off or maybe even declined since 1998

1998 is considered as the maximum of the modern warm period by some cycle researchers.. Will the winter SAM start dipping negative as well?

Intuitively you would suspect a persistent negative SAM trend would be needed for a period of global cooling..?

    …………The SAM index. SEASONAL..
    Top.(.SUMMER. DJF 1947-2010)
    Middle.( WINTER JJA ..1948-2010)
    Bottom. (ANNUAL 1948-2010)

    The yellow lines indicate 7-year Gaussian-type filtered values.
    time series of SAM

    RESOURCE LINK from
    http://www.lasg.ac.cn/
    Is There a Relationship between the SAM and Southwest Western …
    http://www.lasg.ac.cn/UpLoadFiles/File/papers/2010/2010_JCLI_Feng_Li_Li.pdf

    ———————————————————————–

    CURRENT SAM/AAO ANOMALY

    http://www.cpc.ncep.noaa.gov/products/precip/CWlink/ENSO/verf/new.aao.shtml

    CURRENT AAO index

    ———————————————————————

      ‘SNOWMI’ on a NEW AUSTRALIAN FORUM has constructed a discussion thread titled

    “Cold Front Activity Controls and Trends”

    ‘Snowmi’ has commenced discussion on the links to the SAM index and cold fronts across Australia

    You can follow and join the discussion here
    http://www.weather.liway.com/forums/viewtopic.php?f=6&t=4

    You may have to register to view the discussion.
    http://www.weather.liway.com/forums/index.php

    This is a new weather and climate forum based in Australia since July 2013
    The forum was developed as a result of the’ weatherzone forum’ closing its climate debate section which left contributors ‘short changed’ and bereft.
    The owner of the forum ..’GB’..like myself felt a need to replace the hole that was left by the Weatherzone decision.
    http://forum.weatherzone.com.au/

    I thank ‘snowmi’ ( a moderator and contributor at the http://www.weather.liway.com forum)for posting the excellent link of the time series data for the SAM

    —————————————————————————

    Advertisements

4 comments on “About…….. the Southern Hemisphere Annular Mode (SAM) Index

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s