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Thread: Help regarding Sea Surface Temperature Data

  1. #1 Help regarding Sea Surface Temperature Data 
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    Hi,

    I am working on marine turtle ecology and I have ended up taking a project where I am looking at Sea Surface Temperature in relation to their behavior. However, I am having difficulty in getting the SST data in a simplified form. The SST data that I got from the met department of my country was horribly inconsitent. So basically I am looking for a simple data set giving the SST on a daily/monthly basis for a given area. Can anyone help me get this? I need numerical values and not maps.

    Thanks in advance!!


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  3. #2  
    Bullshit Intolerant PhDemon's Avatar
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    Try here: ESRL : PSD : NOAA Optimum Interpolation (OI) Sea Surface Temperature (SST) V2

    The data is available for download but is in horrible1 netCDF format so you may need to download something that can read these files.

    1. Probably biased as I always used to upload my fieldwork data to the BADC as NASA Ames formatted files and only occasionally had to use netCDF and it seemed to be a pain in the ass...


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  4. #3  
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    Hey. Thanks... that was really helpful. I downloaded the monthly mean data set and figured out how to open it in Excel using a .nc plugin. I took the latitude and longitude for which I wanted the data. Just one question... is the data actual temperature in Degree Celsius or a fluctuation from the average. Because I am focusing on a tropical region where the average temperature should be around 30 degrees Celsius...but the data set is showing values mostly from -3 to +3.
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  5. #4  
    Bullshit Intolerant PhDemon's Avatar
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    I don't know, I haven't used that data myself but from the numbers you give it could be the SST anomaly1 that is presented not just the SST. That information should be in the file header or on the download page.

    The deviation from a notional average (normally 1971-2000). I.e an anomaly for June of +3 degrees means that the average temperature for that June was 3 degrees warmer than the average June data from 1971-2000.
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  6. #5  
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    "Monthly DataThe NOAA OI.v2 SST monthly fields are derived by a linear interpolation of the weekly optimum interpolation (OI) version 2 fields to daily fields then averaging the daily values over a month. The monthly fields are in the same format and spatial resolution as the weekly fields.The ice field shows the approximate monthly average of the ice concentration values input to the SST analysis. Ice concentration is stored as the percentage of area covered. For the ice fields, the land and coast grid cells have been set to the netCDF missing value."

    That's what it says on the download page. Hard for me to deduce what the data values are!

    *sometimes i feel like a fish trying to climb a tree*
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  7. #6  
    Bullshit Intolerant PhDemon's Avatar
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    Yeah it does seem a bit convoluted! I'm almost certain the data is SST anomaly though as the values are -3 to +3 and if you read the next section it gives references for the long term climatologies that would be used to calculate the anomalies: "Monthly Long-term mean DataA climatology based on these fields was derived by Yan Xue of the NCEP Climate Prediction Center following the technique of Reynolds and Smith (1995) and Smith and Reynolds (1998). The climatologies are available here in the sst.ltm.*.nc files and include 1961-1990 and 1971-2000. See the references for details on how the climatologies were calculated.
    1. Paper 1
    2. Paper 2
    For more information see NOAA OI SST Analysis."

    A description of the OI.v2 method is presented here:

    ftp://ftp.emc.ncep.noaa.gov/cmb/sst/...v2pap/oiv2.pdf
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  8. #7  
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    Hi

    Thanks for the info. I am scanning some more databases for absolute SST data. I have gone through a number of research papers but most of them seemed to have used databases which don't cover my time range or have worked with the maps instead of quantitative data.

    Meanwhile, would you know which format should i use for El Nino data...and Indian Ocean Dipole data? Again there are a lot of different versions for El Nino Index that are available ... i've so far explored the MEI data available on the NOAA website. But i am a bit uncertain as to which one should I be using. As for IOD... i haven't found the data yet!

    Any advice is great.
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  9. #8  
    Bullshit Intolerant PhDemon's Avatar
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    Sorry I don't think I can help you there. I've only ever used the atmospheric databases (not the oceanic ones) so I've already given all the help I'm able to, it might be worth emailing someone at NOAA (from the details on the "contact us" part of the website), it may take a while to get a response as those guys are quite busy but they are generally quite helpful in my experience. Good luck anyway, hope you find what you need.
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  10. #9  
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    This might help, you can get real time data from here; it's a variation of satellite derived data already linked above.
    RTG_SST_HR AnalysisYou might try here as well: Current Marine Data | Oceanweather Inc.Another source with climate data going back some 200 years is: ICOADS Data and Documentation
    Meteorologist/Naturalist & Retired Soldier
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