Difference between revisions of "Grid-independent emissions"

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(Apply temporary scaling to biogenic VOC emissions)
(Biogenic VOC emissions)
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'''Developer:''' Jintai Lin (PKU) and Hongjian Meng (PKU)
 
'''Developer:''' Jintai Lin (PKU) and Hongjian Meng (PKU)
  
'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_BIOVOC/v2019-01/README
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'''README''': http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_BIOVOC/v2019-08/README
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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.
  
 
=== Apply temporary scaling to biogenic VOC emissions ===
 
=== Apply temporary scaling to biogenic VOC emissions ===
  
The offline biogenic VOC emissions 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]]. At the time of implementation into the standard model in [[GEOS-Chem 12#12.4.0|GEOS-Chem 12.4.0]], the following updates and fixes had been applied to MEGAN since v11-02:
+
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:
  
 
*[[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)
 
*[[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)

Revision as of 16:12, 9 August 2019

These emissions will be included in GEOS-Chem 12.4.0.

Overview

Dust emissions

Developers: David Ridley (CARB, formerly MIT), Jun Meng (Dalhousie)

README: http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_DUST/v2019-01/README

Please see this post on the Mineral Dust Aerosols wiki page for a details about the offline dust emissions.

Lightning NOx emissions

Developer: Lee Murray (Rochester)

README: http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_LIGHTNING/v2019-01/GEOSFP/README

Biogenic VOC emissions

Developer: Jintai Lin (PKU) and Hongjian Meng (PKU)

README: http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_BIOVOC/v2019-08/README

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 12.5.0 and later were generated with GEOS-Chem 12.3.0.

Apply temporary scaling to biogenic VOC emissions

The offline biogenic VOC emissions implemented in GEOS-Chem 12.4.0 and found in HEMCO/OFFLINE_BIOVOC/v2019-01 were generated using GEOS-Chem v11-02. The following updates and fixes had been applied to MEGAN since v11-02:

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).

        geosfp_4x5_MEGAN  geosfp_2x25_MEGAN  geosfp_4x5_OfflineBioVOC  Scale Factors
ACET	25.05267 Tg       24.37869 Tg        26.95496 Tg               0.9294271416
ALD2	9.882695 Tg       9.772552 Tg        8.402392 Tg               1.176176379
C2H4	21.87993 Tg       21.54709 Tg        16.22218 Tg               1.348766171
EOH	9.450429 Tg       9.345103 Tg        8.034874 Tg               1.176176378
ISOP	355.8949 Tg       364.0299 Tg        233.8795 Tg               1.521701941
PRPE	19.95450 Tg       19.46565 Tg        18.49293 Tg               1.079034029
SOAP	0.484302 Tg       0.495372 Tg        0.067689 Tg               7.154810974
SOAS	0.484302 Tg       0.495372 Tg        0.067689 Tg               7.154810974 

The following changes need to be included in HEMCO_Config.rc if you're using this version of the offline biogenic VOC emissions.

#==============================================================================
# --- Offline biogenic VOC emissions ---
#==============================================================================
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 610 4 2
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 611 4 2
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 612 4 2
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  613 4 2
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 614 4 2
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 615 4 2
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 616 4 2
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 616 4 2

...

610 ACET_SF 0.929 - - - xy 1 1
611 ALD2_SF 1.176 - - - xy 1 1
612 C2H4_SF 1.349 - - - xy 1 1
613 EOH_SF  1.176 - - - xy 1 1
614 ISOP_SF 1.522 - - - xy 1 1
615 PRPE_SF 1.079 - - - xy 1 1
616 SOA_SF  7.155 - - - xy 1 1

--Melissa Sulprizio (talk) 16:07, 18 June 2019 (UTC)

Sea salt emissions

Developer: Jintai Lin (PKU) and Hongjian Meng (PKU)

README: http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/OFFLINE_SEASALT/v2019-01/README

Soil NOx emissions

Developer: Jintai Lin (PKU) and Hongjian Meng (PKU)

README: http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/SOILNOX/v2019-01/README