Hi Steppe. Get outline shapefiles for the area(s) that you want to study.
These are readily available on line for countries, states, and major
regions such as the lower 48 US states (AKA CONUS). There are also
shapefile libraries for other geographic definitions, such as hydrologic
basins. It is also fairly easy to make your own custom shapefiles with GIS
tools.
Then use these shapefiles to accurately select subsets of grid points from
your GCM files. Then you can easily perform grid point averaging and other
statistics on the area(s) of interest. Shapefile support functions are
available in most modern computer languages that have geographic
functionality.
I favor NCL for this purpose. But if you are familiar with something like
Python, Matlab, or R, look for shapefile capability there first.
On Fri, Feb 26, 2021 at 8:50 AM Steppe Rottgering <
stepperottgering@xxxxxxxxx> wrote:
> Hi all,
>
>
> My name is Steppe and I am writing my master thesis about the impact of
> climate change on wildfires in the United States. I downloaded some General
> Circulation Models (GCM's) from the Coupled Model Intercomparison Project
> Phase 5 (CMIP5) , which are NetCDF files. I used R to open the data and
> found Panoply and good format to visualize the data. Now, I'm looking for a
> NetCDF tool which can convert latlon to states in the United States (maybe
> just take the mean of all latlons in a state)?
>
>
> In the end, I want for all states in the United States one precipitation /
> maximum temperature value per timestamp (months).
>
>
> It would be great and much appreciated if someone can help me with this.
>
>
>
> Thanks in advance.
>
>
>
> Best regards,
>
> Steppe
>
