weatherwiz Posted February 6, 2011 Share Posted February 6, 2011 I know here you can retrieve Nino 3.4 trimonthly numbers dating back to 1950...but I was wondering if such a table exists for year pre-1950 dating back to as early as the mid 1860's. http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/ensoyears.shtml I know of this link which gives you Nina 3.4 SST's back to 1871 but this really doesn't help me much http://www.esrl.noaa.gov/psd/gcos_wgsp/Timeseries/Data/nino34.long.data Basically I'm trying to find out La Nina's/EL Nino's/Neutral ENSO events for all seasons dating back to about the mid 1800's. Link to comment Share on other sites More sharing options...
uncle W Posted February 6, 2011 Share Posted February 6, 2011 I know here you can retrieve Nino 3.4 trimonthly numbers dating back to 1950...but I was wondering if such a table exists for year pre-1950 dating back to as early as the mid 1860's. http://www.cpc.ncep....ensoyears.shtml I know of this link which gives you Nina 3.4 SST's back to 1871 but this really doesn't help me much http://www.esrl.noaa...ino34.long.data Basically I'm trying to find out La Nina's/EL Nino's/Neutral ENSO events for all seasons dating back to about the mid 1800's. try this... ftp://www.coaps.fsu.edu/pub/JMA_SST_Index/jmasst1868-today.filter-5 Link to comment Share on other sites More sharing options...
weatherwiz Posted February 7, 2011 Author Share Posted February 7, 2011 try this... ftp://www.coaps.fsu....-today.filter-5 This seems very good, thank you! I'm just unsure on how to exactly read it...I'm going to guess the negative values represent cooler episodes (Nina) and positive values represent warmer episodes (Nino) with zero represents neutral conditions. As for determining strength what would the threshold be for weak, moderate, and strong episodes? Link to comment Share on other sites More sharing options...
gil888 Posted February 7, 2011 Share Posted February 7, 2011 I know here you can retrieve Nino 3.4 trimonthly numbers dating back to 1950...but I was wondering if such a table exists for year pre-1950 dating back to as early as the mid 1860's. http://www.cpc.ncep....ensoyears.shtml I know of this link which gives you Nina 3.4 SST's back to 1871 but this really doesn't help me much http://www.esrl.noaa...ino34.long.data Basically I'm trying to find out La Nina's/EL Nino's/Neutral ENSO events for all seasons dating back to about the mid 1800's. If you take the data from the second link and put it into Excel, make averages and then compute the differences-- it is pretty easy to make your own anomalies and to use whatever averaging you want. +- 0.5 is usually neutral, less than 1.0 being weak and less than 1.5 being moderate events. I'd recommend a few month's averaging to smooth things. Link to comment Share on other sites More sharing options...
aslkahuna Posted February 7, 2011 Share Posted February 7, 2011 If you take the data from the second link and put it into Excel, make averages and then compute the differences-- it is pretty easy to make your own anomalies and to use whatever averaging you want. +- 0.5 is usually neutral, less than 1.0 being weak and less than 1.5 being moderate events. I'd recommend a few month's averaging to smooth things. To digress for a moment, you can get the ± sign by going ALT241 on the Number pad with Num Lock on. Steve Link to comment Share on other sites More sharing options...
weatherwiz Posted February 7, 2011 Author Share Posted February 7, 2011 If you take the data from the second link and put it into Excel, make averages and then compute the differences-- it is pretty easy to make your own anomalies and to use whatever averaging you want. +- 0.5 is usually neutral, less than 1.0 being weak and less than 1.5 being moderate events. I'd recommend a few month's averaging to smooth things. Thank you! Link to comment Share on other sites More sharing options...
bluewave Posted February 8, 2011 Share Posted February 8, 2011 Here's a great paper on the 1918/19 El Nino: http://www.esrl.noaa...eseetal2009.pdf Link to comment Share on other sites More sharing options...
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