def read_aphi_from_file(self, file_name):
        """Read the phytoplankton absorption file from a csv formatted file

        :param file_name: filename and path of the csv file
        """
        lg.info('Reading ahpi absorption')
        try:
            self.a_phi = self._read_iop_from_file(file_name)
        except:
            lg.exception('Problem reading file :: ' + file_name)
            self.a_phi = -1
Read the phytoplankton absorption file from a csv formatted file

        :param file_name: filename and path of the csv file