Transport Working Group: Difference between revisions

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!width="300px" bgcolor="#CCCCCC"|Transport Working Group Co-Chairs
!width="300px" bgcolor="#CCCCCC"|Transport Working Group Co-Chairs
|width="600px"|
|width="600px"|
*[https://sciences.gsfc.nasa.gov/sed/bio/clara.orbe Clara Orbe]
*[https://science.gsfc.nasa.gov/sci/bio/k.e.knowland Emma Knowland] (Github: [https://github.com/keknowland @keknowland])
*[https://www.cira.colostate.edu/staff/schuh-andrew/ Andrew Schuh] (Github: [https://github.com/aschuh aschuh])
*[https://www.cira.colostate.edu/staff/schuh-andrew/ Andrew Schuh] (Github: [https://github.com/aschuh @aschuh])
*[https://science.larc.nasa.gov/people/katherine-travis/ Katie Travis] (Github: [https://github.com/ktravis213 @ktravis213])
*[https://science.larc.nasa.gov/people/katherine-travis/ Katie Travis] (Github: [https://github.com/ktravis213 @ktravis213])


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!width="600px"|Description
!width="600px"|Description
!width="300px"|Contact Person
!width="300px"|Contact Person
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|NASA GMAO<br>Harvard
|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
|Emma Knowland<br>Lizzie Lundgren


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|Quantifying the impact of errors in PBL mixing on CO2
|Quantifying the impact of errors in PBL mixing on CO2
|[mailto:wlu@atmosp.physics.utoronto.ca Wei Lu]
|[mailto:wlu@atmosp.physics.utoronto.ca Wei Lu]
|-valign="top"
|Harvard
|Examining the effect of grid resolution on vertical transport and convective mass fluxes
|[mailto:karenyu@g.harvard.edu Karen Yu]
|-valign="top"
|Harvard
|Quantifying the impact of numerical diffusion on plume transport and comparing to observed atmospheric diffusion
|[mailto:seastham@fas.harvard.edu Sebastian D. Eastham]
|-valign="top"
|Harvard
|Assessing the co-benefits of increasing vertical and horizontal grid resolutions for tracer transport
|[mailto:jiaweizhuang@g.harvard.edu Jiawei Zhuang]
|-valign="top"
|Dalhousie
|Implementation of a new PBL mixing scheme
|[mailto:Aaron.van.Donkelaar@dal.ca Aaron van Donkelaar]


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|NIA / NASA Langley
|NIA / NASA Langley
|Constraints on Precipitation Scavenging and Transport of Soluble Trace Species From Airborne and Surface Radionuclide (222Rn, 210Pb, 7Be, 10Be) Observations
|Constraints on Precipitation Scavenging and Transport of Soluble Trace Species From Airborne and Surface Radionuclide (222Rn, 210Pb, 7Be, 10Be) Observations
|[mailto:bo.zhang@nianet.org Bo Zhang] [mailto:hongyu.liu-1@nasa.gov Hongyu Liu]
|[mailto:bo.zhang@nianet.org Bo Zhang]<br>[mailto:hongyu.liu-1@nasa.gov Hongyu Liu]
 
|-valign="top"
|Harvard
|Vertical resolution needs for GEOS-Chem global transport
|[[User:Ada Shaw|Ada Shaw]]
 
|-valign="top"
|Harvard<br>U. Toronto
|Re-diagnosed convection in off-line GEOS-Chem
|[[User:Bmy|Bob Yantosca]]<br>Tailong He


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|}
|}


== Current GEOS-Chem Transport Issues ==
== Related pages ==
 
Text to be added
 
== Transport Tracers simulation ==
 
<span style="color:green">'''''This update was included in [[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]], which was released on 19 Feb 2019.'''''</span>
 
The Transport Working Group proposed implementing a common set of transport tracers in GEOS-Chem for benchmarking purposes and for diagnosing transport in GEOS-Chem compared to GEOS. The [https://gmi.gsfc.nasa.gov/uploads/files/gmi_tracersuite.pdf GMI tracer suite] is implemented via the tracer gridded component "TR_GridComp" in GEOS. In GEOS-Chem, the tracer suite has been added as an extension of the [[Rn-Pb-Be simulation]] (simulation type "1") by default, but may be added to any GEOS-Chem simulations by following the [[#Implementation in GEOS-Chem|instructions below]].
 
The current and future proposed transport tracers are summarized below.
 
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="200px"|Tracer name in GEOS-Chem
!width="100px"|Tracer name in GEOS / GMI
!width="400px"|Description
!width="150px"|Version added
 
|-valign="top"
|Rn222
|Rn222
|Radon-222 nuclide
*See our Rn-Pb-Be wiki page for information on [[Rn-Pb-Be_simulation#Sources|sources]] and [[Rn-Pb-Be_simulation#Sinks|sinks]]
*Used to evaluate convection over land and strat-trop exchange
|[http://acmg.seas.harvard.edu/geos/geos_versions.html GEOS-Chem v2-02]
 
|-valign="top"
|Pb210
|Pb210
|Lead-210 nuclide
*See our Rn-Pb-Be wiki page for information on [[Rn-Pb-Be_simulation#Sources|sources]] and [[Rn-Pb-Be_simulation#Sinks|sinks]]
*Used to evaluate wet scavenging and transport
|[http://acmg.seas.harvard.edu/geos/geos_versions.html GEOS-Chem v2-02]
 
|-valign="top"
|Pb210Strat
|Pb210Strat
|Lead-210 produced in the stratosphere
*See our Rn-Pb-Be wiki page for information on [[Rn-Pb-Be_simulation#Sources|sources]] and [[Rn-Pb-Be_simulation#Sinks|sinks]]
*Used to evaluate strat-trop exchange
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|Be7
|Be7
|Beryllium-7 nuclide
*See our Rn-Pb-Be wiki page for information on [[Rn-Pb-Be_simulation#Sources|sources]] and [[Rn-Pb-Be_simulation#Sinks|sinks]]
*Used to evaluate wet scavenging and strat-trop exchange
|[http://acmg.seas.harvard.edu/geos/geos_versions.html GEOS-Chem v2-02]
 
|-valign="top"
|Be7Strat
|Be7Strat
|Berylium-7 produced in the stratosphere
*Used to evaluate strat-trop exchange
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|Be10
|Be10
|Beryllium-10 nuclide
*Used to evaluate wet scavenging and strat-trop exchange
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|Be10Strat
|Be10Strat
|Beryllium-10 produced in the stratosphere
*Used to evaluate strat-trop exchange
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|PassiveTracer
|N/A
|Passive tracer with initial concentration of 100 ppb (no emissions or decay)
*Used to evaluate mass conservation in transport
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|SF6tracer
|SF6
|Sulfur hexafluoride with anthropogenic emissions from [[EDGAR_v4.2_anthropogenic_emissions|EDGAR v4.2]]
*Used to evaluate inter-hemispheric transport of anthropogenic emissions
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|CH3Itracer
|CH3I
|Methyl iodide with emissions over the oceans of 1 molec/cm2/s and a 5-day lifetime
*Used to evaluate marine convection
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|COAnthroEmis25dayTracer
|CO_25
|CO tracer with anthropogenic emissions from [[CEDS_anthropogenic_emissions|CEDS]] and a 25-day lifetime
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|COAnthroEmis50dayTracer
|CO_50
|CO tracer with anthropogenic emissions from [[CEDS_anthropogenic_emissions|CEDS]] and a 50-day lifetime
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|COUniformEmis25dayTracer
|Uniform
|CO tracer with uniform surface emissions of 2400 Tg/yr and a 25-day lifetime
*Used for evaluating tropospheric mixing
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|GlobEmis90dayTracer
|e90
|Tracer emitted globally at the surface such that the mixing ratio is 100 ppbv and has a 90-day lifetime
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|NHEmis90dayTracer
|e90_n
|Tracer emitted in the Northern Hemisphere at the surface such that the mixing ratio is 100 ppbv and has a 90-day lifetime
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|SHEmis90dayTracer
|e90_s
|Tracer emitted in the Southern Hemisphere at the surface such that the mixing ratio is 100 ppbv and has a 90-day lifetime
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|AgeOfAir
|aoa, Clock
|Age of air [s]
*Used for evaluating residual circulation and mixing
*'''''Not implemented in GEOS-Chem as a tracer, but as a field in State_Met that is saved out via HISTORY.rc'''''
|[[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]]
 
|-valign="top"
|TBD
|nh_5
|Northern Hemisphere 5 day tracer
|TBD
 
|-valign="top"
|TBD
|nh_50
|Northern Hemisphere 50 day tracer
|TBD
 
|-valign="top"
|TBD
|sh_5
|Southern Hemisphere 5 day tracer
|TBD
 
|-valign="top"
|TBD
|sh_50
|Southern Hemisphere 50 day tracer
|TBD
 
|-valign="top"
|TBD
|ntr_5
|Northern Hemisphere Subtropical 5 day tracer
|TBD
 
|-valign="top"
|TBD
|ntr_50
|Northern Hemisphere Subtropical 50 day tracer
|TBD
 
|-valign="top"
|TBD
|str_5
|Southern Hemisphere Subtropical 5 day tracer
|TBD
 
|-valign="top"
|TBD
|str_50
|Southern Hemisphere Subtropical 50 day tracer
|TBD
 
|-valign="top"
|TBD
|tr_5
|Tropical 5 day tracer
|TBD
 
|-valign="top"
|TBD
|tr_50
|Tropical 50 day tracer
|TBD
 
 
|-valign="top"
|TBD
|st80_25
|Stratospheric source 25 day tracer
|TBD
 
|-valign
|TBD
|oNpbl
|[[#Origin tracers|Origin tracer]] for 45N-90N and surface to ~800 hPa
|TBD
 
|-valign
|TBD
|oSpbl
|[[#Origin tracers|Origin tracer]] for 45S-90S and surface to ~800 hPa
|TBD
 
|-valign
|TBD
|oStrat
|[[#Origin tracers|Origin tracer]] for the stratosphere
|TBD
 
|}
 
=== Implementation in GEOS-Chem ===
 
Several of the GEOS tracers listed above have been added as [[HEMCO_examples#Passive_species|passive species in GEOS-Chem]]. The new tracers are listed in the advected species menu of input.geos as:
 
%%% ADVECTED SPECIES MENU %%%:
Type of simulation      : 1
Species Entries ------->: Name
Species name            : Rn222
Species name            : Pb210
Species name            : Pb210Strat
Species name            : Be7
Species name            : Be7Strat
Species name            : Be10
Species name            : Be10Strat
Species name            : PassiveTracer
<span style="color:green">Species name            : SF6tracer
Species name            : CH3Itracer
Species name            : COAnthroEmis25dayTracer
Species name            : COAnthroEmis50dayTracer
Species name            : COUniformEmis25dayTracer
Species name            : GlobEmis90dayTracer
Species name            : NHEmis90dayTracer
Species name            : SHEmis90dayTracer</span>
 
In the passive species menu of input.geos, each species is defined along with the molecular weight, lifetime, default background concentration, and long name.
 
%%% PASSIVE SPECIES MENU %%%:
Passive species name    : PassiveTracer                        1.0  -1      1.0e-7  Passive_tracer_for_mass_conservation_evaluation
<span style="color:green">Passive species name    : SF6Tracer                146.0 -1      1.0e-20  Sulfur_hexafluoride
Passive species name    : CH3ITracer                142.0  4.32e5  1.0e-20  Methyl_iodide
Passive species name    : COAnthroEmis25dayTracer  28.0  2.16e6  1.0e-20  Anthropogenic_CO_with_25day_lifetime
Passive species name    : COAnthroEmis50dayTracer  28.0  4.32e6  1.0e-20  Anthropogenic_CO_with_50day_lifetime
Passive species name    : COUniformEmis25dayTracer  28.0  2.16e6  1.0e-20  CO_with_uniform_emission_and_25day_lifetime
Passive species name    : GlobEmis90dayTracer        1.0  7.776e6 1.0e-20  Globally_emitted_tracer_with_90day_lifetime_and_100ppbv_maintained_mixing_ratio
Passive species name    : NHEmis90dayTracer          1.0  7.776e6 1.0e-20  Northern_hemisphere_emitted_tracer_with_90day_lifetime_and_100ppbv_maintained_mixing_ratio
Passive species name    : SHEmis90dayTracer          1.0  7.776e6 1.0e-20  Southern_hemisphere_emitted_tracer_with_90day_lifetime_and_100ppbv_maintained_mixing_ratio</span>
 
Species with an emissions flux also have a corresponding entry in the HEMCO_Config.rc file.
 
#==============================================================================
# SF6 emissions from EDGAR v4.2
#==============================================================================
0 EDGAR_SF6  $ROOT/SF6/v2019-01/EDGAR_v42_SF6_IPCC_2.generic.01x01.nc emi_sf6 1970-2008/1-12/1/0 C xy kg/m2/s SF6Tracer - 1 1
#==============================================================================
# CH3I emitted over the oceans at rate of 1 molec/cm2/s
#==============================================================================
0 SRC_2D_CH3I 1.0 - - - xy molec/cm2/s CH3ITracer 1000 1 1
#==============================================================================
# Anthropogenic CO 25-day and 50-day tracers
#==============================================================================
0 CEDS_CO25d_ENE  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_ene  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_ENE  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
0 CEDS_CO25d_IND  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_ind  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_IND  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
0 CEDS_CO25d_TRA  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_tra  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_TRA  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
0 CEDS_CO25d_RCO  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_rco  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_RCO  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
0 CEDS_CO25d_SLV  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_slv  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_SLV  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
0 CEDS_CO25d_WST  $ROOT/CEDS/v2018-08/$YYYY/CO-em-anthro_CMIP_CEDS_$YYYY.nc  CO_wst  1950-2014/1-12/1/0 C xy kg/m2/s COAnthroEmis25dayTracer  26 1/2/12 5
0 CEDS_CO50d_WST  -                                                          -      -                  - -  -      COAnthroEmis50dayTracer  26 1/2/12 5
 
#==============================================================================
# CO tracer with uniform surface emission of 2400 Tg/yr
#==============================================================================
0 SRC_2D_COUniform25d 1.5e-7 - - - xy kg/m2/s COUniformEmis25dayTracer - 1 1
...
1000 OCEAN_MASK $METDIR/$CNYR/01/$MET.$CNYR0101.CN.$RES.$NC FROCEAN 2000/1/1/0 C xy 1 1 -180/-90/180/90
 
To save out the AgeOfAir field, make sure <tt>Transport</tt> is uncommented in your list of collections at the top of HISTORY.rc.
 
#==============================================================================
# %%%%% THE Transport COLLECTION %%%%%
#
# Diagnostics for evaluating transport, including age of air [s]
#
# Available for all simulations
#==============================================================================
  Transport.template:        '%y4%m2%d2_%h2%n2z.nc4',
  Transport.format:          'CFIO',
  Transport.frequency:        'End',
  Transport.duration:        'End',
  Transport.mode:            'instantaneous'
  Transport.fields:          'Met_AgeOfAir                  ', 'GIGCchem',
::
 
--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 13:12, 4 January 2019 (UTC)
 
=== Origin tracers ===
 
'''''Chris Holmes wrote:'''''
 
:Another tracer suggestion: I like and use the "origin" tracers defined by Clara Orbe et al. (2013). These tracers give the fraction of air that that originates in specified source regions.
 
:In addition to diagnosing transport, I think the tracers will be useful as templates for users to modify for their own purposes (e.g. customizing source regions). For that reason, a comprehensive set of tracers would be useful, if they can be optional.
 
:'''Reference'''
:Orbe, C., M. Holzer, L. M. Polvani, and D. Waugh (2013), ''Air-mass origin as a diagnostic of tropospheric transport'', <u>J. Geophys. Res. Atmos.</u>, 118, 1459–1470, doi:10.1002/jgrd.50133.


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 18:42, 23 February 2018 (UTC)
*[[TransportTracers simulation]]

Latest revision as of 17:47, 5 September 2024

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Transport Working Group Co-Chairs
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Current GEOS-Chem Transport Projects (please add yours!)

User Group Description Contact Person
NASA GMAO
Harvard 		Model inter-comparison of transport (GEOS, GCHP, GCClassic) Emma Knowland
Lizzie Lundgren
U. Toronto Assessing impact of transport biases on methane simulation and applying weak constraint 4D-Var to correct them Ilya Stanevich
U. Toronto Characterizing model transport errors using weak constraint 4D-Var Martin Keller
U. Toronto Quantifying the impact of errors in PBL mixing on CO2 Wei Lu
NIA / NASA Langley Constraints on Precipitation Scavenging and Transport of Soluble Trace Species From Airborne and Surface Radionuclide (222Rn, 210Pb, 7Be, 10Be) Observations Bo Zhang
Hongyu Liu
Add yours here!    

Related pages

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