def METHOD_NAME(data_tm5, path_emep):
    reader = ReadMscwCtm(data_dir=path_emep["data_dir"])
    data_emep = reader.read_var("concpm10", ts_type="monthly")
    # Change units and year to match TM5 data
    data_emep.change_base_year(2010)
    data_emep.units = "1"
    col = colocate_gridded_gridded(data_emep, data_tm5)
    assert isinstance(col, ColocatedData)