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1 | Simulation with double call to radiation for stratospheric (mostly volcanic) aerosols, |
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2 | in order to calculate IRFs, with respect to "clean" case. |
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3 | |
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4 | This option became available in the 6.1.11 version of IPSL-CM6. |
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5 | |
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6 | To activate the IRF calculation : |
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7 | use flag ok_volcan in PARAM/config.def_* (here the _preind is used) : |
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8 | # Flag to yield double call with/without natural forcing (instead of with/without anthropic) |
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9 | ok_volcan=y |
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10 | |
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11 | To activate the corresponding IRF output : |
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12 | See COMP/lmdz.card : |
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13 | Note the use of PARAM/*.xml_2RadCall files |
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14 | Key elements : |
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15 | in field*lmdz* : groups "fields_irf_aer_standard" and "fields_irf_aer_CMIPstyle"; |
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16 | in file*lmdz* : only the group "CMIPstyle" is activated, |
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17 | and it only contains the 8 "aerosol-radiation interaction" variables. |
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18 | No aerosol-cloud interaction (4 variables), because stratosphere is very dry, no (very few) clouds. |
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19 | |
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20 | Also note in lmdz.card the post-processing (TS_MO) for the 8 aerosol IRF variables |
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21 | (with CMIPstyle irf* names instead of the native "tospswad, topswaiâŠ") |
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22 | |
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23 | The 6.1.11 version of PARAM/ping_LMDZ.xml file includes new "volcanic" variables, only needed for VolMIP. |
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