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https://wiki.seas.harvard.edu/geos-chem/index.php?title=Grid-independent_emissions&diff=44969
Grid-independent emissions
2019-09-11T16:56:06Z
<p>Junmeng: </p>
<hr />
<div><span style="color:darkorange">'''''These emissions will be included in [[GEOS-Chem 12#12.4.0|GEOS-Chem 12.4.0]].'''''</span><br />
<br />
== Overview ==<br />
<br />
== Dust emissions ==<br />
<br />
'''Developers:''' David Ridley (CARB, formerly MIT), Jun Meng (Dalhousie)<br />
<br />
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_DUST/v2019-01/README<br />
<br />
Please see [[Mineral_dust_aerosols#Offline_Dust_Emissions|this post on the ''Mineral Dust Aerosols'' wiki page]] for a details about the offline dust emissions.<br />
<br />
== Lightning NOx emissions ==<br />
<br />
'''Developer:''' Lee Murray (Rochester)<br />
<br />
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_LIGHTNING/v2019-01/GEOSFP/README<br />
<br />
== Biogenic VOC emissions ==<br />
<br />
'''Developer:''' Jintai Lin (PKU) and Hongjian Weng (PKU)<br />
<br />
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_BIOVOC/v2019-08/README<br />
<br />
Grid-independent offline biogenic VOC emissions are now available for GEOS-Chem at native MERRA-2 (0.5° x 0.625°) and GEOS-FP (0.25° x 0.3125°) meteorology field resolution. The emissions used in [[GEOS-Chem 12#12.5.0|GEOS-Chem 12.5.0]] and later were generated with GEOS-Chem 12.3.0.<br />
<br />
=== Fixes for biogenic SOAP, SOAS, and CO emissions ===<br />
<br />
<span style="color:green">'''''This fix (Git ID: [https://github.com/geoschem/geos-chem-unittest/commit/65abcc66c1e76d91cbb8a3d53abb485f0b8b6084 65abcc66]) was included in [[GEOS-Chem 12#12.5.0|GEOS-Chem 12.5.0]], which was released on 09 Sep 2019.'''''</span><br />
<br />
The 1-month benchmark for [[GEOS-Chem 12#12.5.0|GEOS-Chem 12.5.0]] revealed some issues with the SOAP, SOAS, and CO emissions in the updated offline biogenic VOC emissions (in <tt>OFFLINE_BIOVOC/v2019-08/</tt>. To resolve the issues, SOAP and SOAS emissions from those files are ignored, and we instead compute those emissions directly from isoprene and monoterpene emissions.<br />
<br />
0 BIOGENIC_ISOP $ROOT/OFFLINE_BIOVOC/v2019-08/{NATIVE_RES}/$YYYY/$MM/biovoc_{LATRES}x{LONRES}.$YYYY$MM$DD.nc ISOP_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s ISOP - 4 2<br />
<span style="color:green">0 BIOGENIC_ISOP_SOAP - - - - - - SOAP 610 4 2<br />
0 BIOGENIC_ISOP_SOAS - - - - - - SOAS 610 4 2</span><br />
0 BIOGENIC_LIMO $ROOT/OFFLINE_BIOVOC/v2019-08/{NATIVE_RES}/$YYYY/$MM/biovoc_{LATRES}x{LONRES}.$YYYY$MM$DD.nc LIMO_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s LIMO - 4 2<br />
<span style="color:green">0 BIOGENIC_LIMO_SOAP - - - - - - SOAP 611 4 2<br />
0 BIOGENIC_LIMO_SOAS - - - - - - SOAS 611 4 2</span><br />
0 BIOGENIC_MTPA $ROOT/OFFLINE_BIOVOC/v2019-08/{NATIVE_RES}/$YYYY/$MM/biovoc_{LATRES}x{LONRES}.$YYYY$MM$DD.nc MTPA_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s MTPA - 4 2<br />
<span style="color:green">0 BIOGENIC_MTPA_SOAP - - - - - - SOAP 611 4 2<br />
0 BIOGENIC_MTPA_SOAS - - - - - - SOAS 611 4 2</span><br />
0 BIOGENIC_MTPO $ROOT/OFFLINE_BIOVOC/v2019-08/{NATIVE_RES}/$YYYY/$MM/biovoc_{LATRES}x{LONRES}.$YYYY$MM$DD.nc MTPO_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s MTPO - 4 2<br />
<span style="color:green">0 BIOGENIC_MTPO_SOAP - - - - - - SOAP 611 4 2<br />
0 BIOGENIC_MTPO_SOAS - - - - - - SOAS 611 4 2</span><br />
0 BIOGENIC_SESQ $ROOT/OFFLINE_BIOVOC/v2019-08/{NATIVE_RES}/$YYYY/$MM/biovoc_{LATRES}x{LONRES}.$YYYY$MM$DD.nc SESQ_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s SESQ - 4 2 <br />
<span style="color:green">0 BIOGENIC_SESQ_SOAP - - - - - - SOAP 612 4 2<br />
0 BIOGENIC_SESQ_SOAS - - - - - - SOAS 612 4 2<br />
<br />
#==============================================================================<br />
# --- Offline biogenic VOC scale factors ---<br />
#<br />
# Isoprene : 1.5% mass yield SOAP, 1.5% mass yield SOAS<br />
# Monoterpenes : 5.0% mass yield SOAP, 5.0% mass yield SOAS<br />
# Other terpenes: 5.0% mass yield SOAP, 5.0% mass yield SOAS<br />
# --> Need to multiply by 1.133 to convert from carbon basis to mass basis<br />
#==============================================================================<br />
610 ISOPtoSOA 0.0170 - - - xy 1 1<br />
611 MONOtoSOA 0.0567 - - - xy 1 1<br />
612 OTHRtoSOA 0.0567 - - - xy 1 1</span><br />
<br />
In addition, the offline [[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Remove_biogenic_CO_emissions_to_avoid_double_counting|biogenic CO emissions are not used to avoid double counting]].<br />
<br />
=== Apply temporary scaling to biogenic VOC emissions in 12.4.0 ===<br />
<br />
The offline biogenic VOC emissions implemented in [[GEOS-Chem 12#12.4.0|GEOS-Chem 12.4.0]] and found in [http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_BIOVOC/v2019-01/ <tt>HEMCO/OFFLINE_BIOVOC/v2019-01</tt>] were generated using [[GEOS-Chem v11-02]]. The following updates and fixes had been applied to MEGAN since v11-02:<br />
<br />
*[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Updated_PFT_file|Update to a new plant functional type (PFT) file created from higher resolution data]] (added in 12.3.0)<br />
*[[Implementation_of_HEMCO_in_GEOS-Chem#Bug_fix:_Read_data_with_the_.22E.22_cycle_flag_just_once|HEMCO bug fix to prevent excessive attempts to read the HEMCO restart file when using GEOS-Chem "Classic"]] (added in 12.1.0)<br />
<br />
Jintai Lin's group is going to regenerate the offline biogenic VOC emissions with the latest version of the model, but as a temporary fix we are going to scale the annual biogenic VOC emission totals to those in 12.3.0. The scale factors were generated by running the [[HEMCO standalone]] using online MEGAN emissions and offline biogenic VOC emissions for one year (2016).<br />
<br />
geosfp_4x5_MEGAN geosfp_2x25_MEGAN geosfp_4x5_OfflineBioVOC Scale Factors<br />
ACET 25.05267 Tg 24.37869 Tg 26.95496 Tg 0.9294271416<br />
ALD2 9.882695 Tg 9.772552 Tg 8.402392 Tg 1.176176379<br />
C2H4 21.87993 Tg 21.54709 Tg 16.22218 Tg 1.348766171<br />
EOH 9.450429 Tg 9.345103 Tg 8.034874 Tg 1.176176378<br />
ISOP 355.8949 Tg 364.0299 Tg 233.8795 Tg 1.521701941<br />
PRPE 19.95450 Tg 19.46565 Tg 18.49293 Tg 1.079034029<br />
SOAP 0.484302 Tg 0.495372 Tg 0.067689 Tg 7.154810974<br />
SOAS 0.484302 Tg 0.495372 Tg 0.067689 Tg 7.154810974 <br />
<br />
The following changes need to be included in HEMCO_Config.rc if you're using this version of the offline biogenic VOC emissions.<br />
<br />
#==============================================================================<br />
# --- Offline biogenic VOC emissions ---<br />
#==============================================================================<br />
0 BIOGENIC_ACET $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc ACET_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s ACET <span style="color:green">610</span> 4 2<br />
0 BIOGENIC_ALD2 $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc ALD2_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s ALD2 <span style="color:green">611</span> 4 2<br />
0 BIOGENIC_C2H4 $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc C2H4_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s C2H4 <span style="color:green">612</span> 4 2<br />
0 BIOGENIC_EOH $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc EOH_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s EOH <span style="color:green">613</span> 4 2<br />
0 BIOGENIC_ISOP $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc ISOP_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s ISOP <span style="color:green">614</span> 4 2<br />
0 BIOGENIC_PRPE $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc PRPE_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s PRPE <span style="color:green">615</span> 4 2<br />
0 BIOGENIC_SOAP $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc SOAP_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s SOAP <span style="color:green">616</span> 4 2<br />
0 BIOGENIC_SOAS $ROOT/OFFLINE_BIOVOC/v2019-01/0.25x0.3125/$YYYY/$MM/biovoc_025.$YYYY$MM$DD.nc SOAS_MEGAN 1980-2017/1-12/1-31/0-23 C xy kgC/m2/s SOAS <span style="color:green">616</span> 4 2<br />
<br />
...<br />
<br />
<span style="color:green">610 ACET_SF 0.929 - - - xy 1 1<br />
611 ALD2_SF 1.176 - - - xy 1 1<br />
612 C2H4_SF 1.349 - - - xy 1 1<br />
613 EOH_SF 1.176 - - - xy 1 1<br />
614 ISOP_SF 1.522 - - - xy 1 1<br />
615 PRPE_SF 1.079 - - - xy 1 1<br />
616 SOA_SF 7.155 - - - xy 1 1</span><br />
<br />
--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:07, 18 June 2019 (UTC)<br />
<br />
== Sea salt emissions ==<br />
<br />
'''Developer:''' Jintai Lin (PKU) and Hongjian Weng (PKU)<br />
<br />
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_SEASALT/v2019-01/README<br />
<br />
== Soil NOx emissions ==<br />
<br />
'''Developer:''' Jintai Lin (PKU) and Hongjian Weng (PKU)<br />
<br />
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/SOILNOX/v2019-01/README</div>
Junmeng