def get_albedo_data(self, interval='season'):
        """
        get albedo data for JSBACH

        returns Data object
        """

        if interval != 'season':
            raise ValueError('Other temporal sampling than SEASON not supported yet for JSBACH BOT files, sorry')

        v = 'var176'

        filename = self.data_dir + 'data/model1/' + self.experiment + '_echam6_BOT_mm_1979-2006_albedo_yseasmean.nc'
        ls_mask = get_T63_landseamask(self.shift_lon)

        albedo = Data(filename, v, read=True,
                      label='MPI-ESM albedo ' + self.experiment, unit='-', lat_name='lat', lon_name='lon',
                      shift_lon=self.shift_lon,
                      mask=ls_mask.data.data)

        return albedo