I am trying to obtain future climate data from several GCM's for my watershed under 2 RCPs according to the BCSD method of statistical downscaling. I did find the data source at:ftp://gdo-dcp.ucllnl.org/pub/dcp/archive/cmip5/hydro/BCSD_daily_forc_nc/
However, this dataset comes for each GCM and a particular year for the entire US (one netcdf file per year). I tried to convert the data format into text files and in that process produced a lot of files covering the whole US (just for one year!). My question is how do I just extract the daily time series for my watershed? This is not possible online, so probably some post processing has to be done. Has anyone else faced this situation? I did try importing the netcdf in ArcGIS and converted to raster and then extracted using clip. This doesn't yield the actual time series.
PS: I use these R codes to convert the netcdf to text fileshttp://pages.iu.edu/~dficklin/netcdf-to-swat-climate-input-files.html
Any suggestions would be welcome!
Dear Chattopadhyay,
You can do it via CDO.
https://code.zmaw.de/projects/cdo
The USGS GeoData Portal will allow you to get the whole time series summarized to your model units in one pull.
Http://cida.usgs.gov/gdp
does not work with internet explorer. Use Firefox or Chrome.
The USGS GeoData Portal, unfortunately only offers CMIP5 monthly data but I need daily time series. Also, everytime I try to upload my shape file (attached) of the watershed, it return an error in upload. I am looking for Kentucky River watershed.
The USGS GeoData Portal, unfortunately only offers CMIP5 monthly data but I need daily time series. Also, everytime I try to upload my shape file (attached) of the watershed, it return an error in upload. I am looking for Kentucky River watershed.
Hello Somsubhra.
1) You can download the daily 1/8-degree climatology (historical + projections using BCSD) from here:
http://gdo-dcp.ucllnl.org/downscaled_cmip_projections/dcpInterface.html#Welcome
2) If you want 1/16-degree resolution BCSD (first item on this page: http://uw-hydro.github.io/data/) you could contact the authors of those data.
3) There is a different statistical downscaling algorithm (MACA) that produced this dataset at U. Idaho:
http://climate.northwestknowledge.net/MACA/
Daily CMIP5 time series are under the 'Bias Corrected Constructed Analogs V2 Daily Climate Projections' tab; the top left choice on the main GeoData Portal page. This has both CMIP3 and CMIP5 in it. For uploading the shapefile, zip up the .shp, .shx, ,dbf, and .prj files together and submit, but don't zip a folder with these files; select the four files and zip them.
Hi Jacob,
Thanks so much for following up. I zipped the shape files and it seemed to work! Just one more thing to clarify: So for the data format, I should be aiming for the OpenDap subset (netcdf files) correct? I think the other algorithms provides some sort of further statistical operations which I won't probably need except the raw time series. Can you please confirm?
Hi
Netcdf Extractor is a good software for extract time series data of Cmip5 to Excel and text, csv, ....
https://agrimetsoft.com/
Hi
By Netcdf-Extractor V2.0, you can merge all files and extract data from them once. You can watch this video for know about merge many NetCDF files:
https://www.youtube.com/watch?v=hF6MTEjAkCo
You can download at: http://www.agrimetsoft.com
Cheers
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