. . . . . . . . . . . "accepted"@en . "Unavailable"@en . "Concentration of total nitrogen {total_N} per unit volume of the atmosphere [aerosol >1um phase] by filtration and elemental analysis"@en . . . . "SDN:P01::ACTNAE02" . . . "conc_N_aerosol_>1um" . . . . . . . . . .