Hi Fatimatuj,
I understand that you are looking for a way to process multiple NetCDF files to handle CMIP6 precipitation data from the ACCESS-CM2 model in MATLAB and are able to preprocess each NetCDF file individually. You can use a for loop as shown in the code snippet given below to preprocess each .nc file one by one.
% Reference date for converting serial time numbers
referenceDate = datetime(1850, 1, 1);
% Time range for extracting precipitation data
startDate = datetime(1990, 1, 1);
endDate = datetime(2100, 12, 31);
% Loop over each NetCDF file
for i = 1:length(ncFiles)
% ncFiles contains full path of each .nc file
ncFile = ncFiles(i);
% Read latitude, longitude, precipitation (pr), and time variables
lat = ncread(ncFile, 'lat');
lon = ncread(ncFile, 'lon');
pr = ncread(ncFile, 'pr');
time = ncread(ncFile, 'time');
% Convert time to datetime format
time = referenceDate + days(time); % Adjust this if your time units are not in days
% Find indices of time within the desired range (1990 to 2100)
timeIndices = find(time >= startDate & time <= endDate);
% Extract precipitation data for the desired time range
pr = pr(:, :, timeIndices);
%regrid the data as per your requirement
end
You can refer to the following MathWorks documentations to understand more about "datetime" and "ncread" functions in detail respectively.
- https://www.mathworks.com/help/matlab/ref/datetime.html
- https://www.mathworks.com/help/matlab/ref/ncread.html
I hope this helps.
