def get_surface_shortwave_radiation_up(self, interval='monthly', **kwargs):
        """
        get surface shortwave upward radiation data for JSBACH

        Parameters
        ----------
        interval : str
            specifies the aggregation interval. Possible options: ['season','monthly']
        """

        locdict = kwargs[self.type]

        y1 = '1980-01-01'  # TODO: move this to the JSON dictionary or some parameter file
        y2 = '2010-12-31'
        rawfile = self.data_dir + self.experiment + '_jsbach_' + y1[0: 4] + '_' + y2[0: 4] + '.nc'
        mdata, retval = self._do_preprocessing(rawfile, 'swdown_reflect_acc', y1, y2, interval=interval, valid_mask=locdict['valid_mask'])
        return mdata, retval