Sec34 emissions

From UKCA

The emission data required by UKCA are currently (vn7.7) handled through the UM ancillary system as 'User defined' items. This puts a limitation on the number of emission species. With the addition of chemistry schemes and enhancement of UKCA itself, there is likely to be an increase in the number as well as complexity (vertical/time profiles, source-wise grouping, ..) of the emissions. Shifting these to Section 34 will give the users more flexibility in handling the emissions through UKCA. This process was actually initiated a while ago and a few of the emission items were 'reserved' in Section 34 as well as the UM ancillary system. This list however, now needs to be revisited in view of the recent and planned developments.

The Table below lists the 'reserved' emission species under Section 34 and their requirement for the existing and near-future chemistry schemes.

Item No. Emission Species Std. Trop. Chem Trop Chem +
Isoprene
Aerosol Chem Extended
Trop. Chem
Regional
AQ Chem
Strat. Chem CheST
180 NOX SURFACE EMISSION (AS NO2) Y Y Y Y Y Y Y
181 CH4 SURFACE EMISSION Y Y Y Y Y Y Y
182 CO SURFACE EMISSION Y Y Y Y Y Y Y
183 HCHO SURFACE EMISSION Y Y Y Y Y Y Y
184 C2H6 SURFACE EMISSION Y Y Y Y Y Y Y
185 C3H8 SURFACE EMISSION Y Y Y Y Y Y Y
186 CH3COCH3 SURFACE EMISSION Y Y Y Y Y Y Y
187 CH3CHO SURFACE EMISSION Y Y Y Y Y Y Y
188 C5H8 (Isoprene) SURFACE EMISSION Y Y Y Y
189 H2 SURFACE EMISSION Y Y
190 NOX AIRCRAFT EMISSION AS NO2 Y Y Y Y Y Y Y
191 N2O SURFACE EMISSION
192 CFCL3 (CFC-11) SURFACE EMISSION
193 CF2CL2 (CFC-12) SURFACE EMISSION
194 CFC-113 SURFACE EMISSION
195 CH3BR SURFACE EMISSION
196 CH3CL SURFACE EMISSION
197 CF2CLBR (H-1211) SURFACE EMISSION
198 CCL4 SURFACE EMISSION
199 CHF2CL (HCFC-22) SURFACE EMISSION
200 CH3CCL3 SURFACE EMISSION
201 CF3BR (H-1301) SURFACE EMISSION
202 SO2 SURFACE EMISSION Y
203 DMS SURFACE EMISSION Y
204 H2S SURFACE EMISSION
205 CS2 SURFACE EMISSION
206 COS SURFACE EMISSION
207 NH3 SURFACE EMISSION Y
208 RADON-222 SURFACE EMISSION
209 SO2 HIGH LEVEL EMISSION Y
210 SO2 VOLCANIC EMISSION Y
211 SO2 BIOMASS EMISSION Y*
212 C4H10 SURFACE EMISSION Y Y
213 C2H4 SURFACE EMISSION Y Y
214 C3H6 SURFACE EMISSION Y Y
215 TOLUENE SURFACE EMISSION Y,Y* Y
216 O-XYLENE SURFACE EMISSION Y* Y
217 CH3OH SURFACE EMISSION Y Y
218 MONOTERPENE SURFACE EMISSION Y Y
219 SESQUITERPENE SURFACE EMISSION Y*
220 BLACK CARBON EMISSION FOSSIL FUEL Y
221 ORGANIC CARBON EMISSION FOSSIL FUEL Y
222 BLACK CARBON EMISSION BIOFUEL Y
223 ORGANIC CARBON EMISSION BIOFUEL Y
224 BLACK CARBON EMISSION BIOMASS Y
225 ORGANIC CARBON EMISSION BIOMASS Y
226 PRESCRIBED DUST NUMBER EMISS
227 PRESCRIBED DUST EMISS MEAN RADIUS
228 PRESCRIBED SEA-SALT NUMBER EMISS
229 PRESCRIBED SEA-SALT EMIS MEAN RADIUS
Addl MEK (other Ketones) SURFACE EMISS Y
Addl NVOC (BVOC) SURFACE EMISSIONS Y
Addl BENZENE SURFACE EMISSIONS Y*
Addl C2H2 SURFACE EMISSIONS Y*

Y : Currently used in existing Scheme. Y*: Proposed or 'Defined but not used' in existing Scheme. Yn: New Scheme.