It's Always Sunny Posted November 3, 2017 Share Posted November 3, 2017 Becoming more familiar with it. Can anyone explain what it is (positive and negative phases) as well as provide any research papers or websites that explain it well? Thanks in advance. Link to comment Share on other sites More sharing options...
griteater Posted November 4, 2017 Share Posted November 4, 2017 This site has various teleconnections and monthly analogs, including ones for the WPO: http://madusweather.com/teleconnections/ Positive Phase Map and current forecasts for the WPO: https://www.esrl.noaa.gov/psd/forecasts/reforecast2/teleconn/wpo.html Daily WPO values: ftp://ftp.cdc.noaa.gov/Public/gbates/teleconn/wpo.reanalysis.t10trunc.1948-present.txt Monthly WPO values (or WP - West Pacific): https://www.esrl.noaa.gov/psd/data/correlation/wp.data One suggestion may be for you to plot 500mb and surface temperature departures for, say, the top 10 most negative WPO Januarys...then plot the top 10 most positive WPO Januarys. Doing this, you will be able to see the upper air and sfc temperature patterns for the negative and positive phases of the WPO index. Plot Monthly 500mb: https://www.esrl.noaa.gov/psd/cgi-bin/data/composites/printpage.pl Plot Sfc Temperature Departures: https://www.esrl.noaa.gov/psd/data/usclimdivs/ Link to comment Share on other sites More sharing options...
It's Always Sunny Posted November 4, 2017 Author Share Posted November 4, 2017 16 hours ago, griteater said: This site has various teleconnections and monthly analogs, including ones for the WPO: http://madusweather.com/teleconnections/ Positive Phase Map and current forecasts for the WPO: https://www.esrl.noaa.gov/psd/forecasts/reforecast2/teleconn/wpo.html Daily WPO values: ftp://ftp.cdc.noaa.gov/Public/gbates/teleconn/wpo.reanalysis.t10trunc.1948-present.txt Monthly WPO values (or WP - West Pacific): https://www.esrl.noaa.gov/psd/data/correlation/wp.data One suggestion may be for you to plot 500mb and surface temperature departures for, say, the top 10 most negative WPO Januarys...then plot the top 10 most positive WPO Januarys. Doing this, you will be able to see the upper air and sfc temperature patterns for the negative and positive phases of the WPO index. Plot Monthly 500mb: https://www.esrl.noaa.gov/psd/cgi-bin/data/composites/printpage.pl Plot Sfc Temperature Departures: https://www.esrl.noaa.gov/psd/data/usclimdivs/ These are great links. Thank you! So identifying the WPO appears to be fairly straightforward: Ridging (positive height anomalies) south and east of Japan = +WPO Troughing (negative height anomalies) south and east of Japan = -WPO Link to comment Share on other sites More sharing options...
griteater Posted November 5, 2017 Share Posted November 5, 2017 5 hours ago, It's Always Sunny said: These are great links. Thank you! So identifying the WPO appears to be fairly straightforward: Ridging (positive height anomalies) south and east of Japan = +WPO Troughing (negative height anomalies) south and east of Japan = -WPO Yes that's part of it, but when folks reference a + or - WPO, they are most likely referring to the anomaly center in NE Siberia and the Bering Strait. Ridging there = -WPO, Troughing there = +WPO Link to comment Share on other sites More sharing options...
AfewUniversesBelowNormal Posted November 5, 2017 Share Posted November 5, 2017 What do you want to know? It's connected to Enso, MJO, Stratosphere... probably the strongest Northern Hemisphere pattern index. Link to comment Share on other sites More sharing options...
It's Always Sunny Posted November 5, 2017 Author Share Posted November 5, 2017 19 hours ago, griteater said: Yes that's part of it, but when folks reference a + or - WPO, they are most likely referring to the anomaly center in NE Siberia and the Bering Strait. Ridging there = -WPO, Troughing there = +WPO Ok, I see it in the graphic above. Just north of Kamchatka Peninsula. My eyes were drawn to the positive anomalies not the negative. Thanks again! 17 hours ago, StormchaserChuck said: What do you want to know? It's connected to Enso, MJO, Stratosphere... probably the strongest Northern Hemisphere pattern index. I don't have any direct questions yet; just familiarizing how to identify it at this time. When/if I do think of a question I'll be sure to let you know! Link to comment Share on other sites More sharing options...
It's Always Sunny Posted November 6, 2017 Author Share Posted November 6, 2017 So it appears that it is directly correlated with the EPO considering that index focuses on the area near AK? Link to comment Share on other sites More sharing options...
OSUmetstud Posted November 6, 2017 Share Posted November 6, 2017 2 hours ago, It's Always Sunny said: So it appears that it is directly correlated with the EPO considering that index focuses on the area near AK? -EPO is farther east with the ridging. For example lots of the ensembles in the 7 to 14 day range lose the -epo but maintain the very strong -wpo because the ridging is retrograding out of AK and more into Kamchatka. Link to comment Share on other sites More sharing options...
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