Difference between revisions of "Transport Working Group"
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{| border=1 cellspacing=0 cellpadding=5 | {| border=1 cellspacing=0 cellpadding=5 | ||
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− | |[mailto:andrea.m.molod@nasa.gov Andrea Molod] | + | !width="300px" bgcolor="#CCCCCC"|Transport Working Group Co-Chairs |
− | |- | + | |width="600px"| |
− | + | *[mailto:andrea.m.molod@nasa.gov Andrea Molod] | |
− | |<tt>geos-chem-transport [at] | + | *[https://www.cira.colostate.edu/staff/schuh-andrew/ Andrew Schuh] |
− | |- | + | |
− | + | |-valign="top" | |
− | |Send email to <tt>geos-chem-transport | + | !bgcolor="#CCCCCC"|Transport Working Group email list |
− | + | |<tt>geos-chem-transport [at] g.harvard.edu</tt> | |
− | |bgcolor="#CCCCCC"| | + | |
− | |Send email to <tt>geos-chem-transport | + | |-valign="top" |
+ | !bgcolor="#CCCCCC"|To subscribe to email list | ||
+ | |Either | ||
+ | *Send an email to <tt>geos-chem-transport+subscribe [at] g.harvard.edu</tt> | ||
+ | Or | ||
+ | *Go to [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-transport GEOS-Chem Transport Google Group] | ||
+ | *Click on '''Subscribe to this group''' | ||
+ | |||
+ | |-valign="top" | ||
+ | !bgcolor="#CCCCCC"|To unsubscribe from email list | ||
+ | |Either | ||
+ | *Send an email to <tt>geos-chem-transport+unsubscribe [at] g.harvard.edu</tt> | ||
+ | Or | ||
+ | *Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-transport GEOS-Chem Transport Google Group] | ||
+ | *Click on the '''My Settings''' button | ||
+ | *Click on '''Leave this group''' | ||
|} | |} | ||
== Current GEOS-Chem Transport Projects (please add yours!) == | == Current GEOS-Chem Transport Projects (please add yours!) == | ||
+ | |||
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!width="600px"|Description | !width="600px"|Description | ||
!width="300px"|Contact Person | !width="300px"|Contact Person | ||
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+ | |U. Toronto | ||
+ | |Assessing impact of transport biases on methane simulation and applying weak constraint 4D-Var to correct them | ||
+ | |[mailto:stanevich@atmosp.physics.utoronto.ca Ilya Stanevich] | ||
+ | |||
+ | |-valign="top" | ||
|U. Toronto | |U. Toronto | ||
|Characterizing model transport errors using weak constraint 4D-Var | |Characterizing model transport errors using weak constraint 4D-Var | ||
|[mailto:mkeller@atmosp.physics.utoronto.ca Martin Keller] | |[mailto:mkeller@atmosp.physics.utoronto.ca Martin Keller] | ||
− | |- | + | |
+ | |-valign="top" | ||
|U. Toronto | |U. Toronto | ||
|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 | |Harvard | ||
|Examining the effect of grid resolution on vertical transport and convective mass fluxes | |Examining the effect of grid resolution on vertical transport and convective mass fluxes | ||
|[mailto:karenyu@g.harvard.edu Karen Yu] | |[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 | |Dalhousie | ||
|Implementation of a new PBL mixing scheme | |Implementation of a new PBL mixing scheme | ||
|[mailto:Aaron.van.Donkelaar@dal.ca Aaron van Donkelaar] | |[mailto:Aaron.van.Donkelaar@dal.ca Aaron van Donkelaar] | ||
− | |- | + | |
+ | |-valign="top" | ||
|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] [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 | ||
+ | |||
+ | |-valign="top" | ||
|Add yours here! | |Add yours here! | ||
| | | | ||
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Text to be added | 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) |
Revision as of 15:15, 11 March 2021
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Current GEOS-Chem Transport Projects (please add yours!)
User Group | Description | Contact Person |
---|---|---|
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 |
Harvard | Examining the effect of grid resolution on vertical transport and convective mass fluxes | Karen Yu |
Harvard | Quantifying the impact of numerical diffusion on plume transport and comparing to observed atmospheric diffusion | Sebastian D. Eastham |
Harvard | Assessing the co-benefits of increasing vertical and horizontal grid resolutions for tracer transport | Jiawei Zhuang |
Dalhousie | Implementation of a new PBL mixing scheme | Aaron van Donkelaar |
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 |
Harvard | Vertical resolution needs for GEOS-Chem global transport | Ada Shaw |
Harvard U. Toronto |
Re-diagnosed convection in off-line GEOS-Chem | Bob Yantosca Tailong He |
Add yours here! |
Current GEOS-Chem Transport Issues
Text to be added
Transport Tracers simulation
This update was included in GEOS-Chem 12.2.0, which was released on 19 Feb 2019.
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 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 instructions below.
The current and future proposed transport tracers are summarized below.
Tracer name in GEOS-Chem | Tracer name in GEOS / GMI | Description | Version added |
---|---|---|---|
Rn222 | Rn222 | Radon-222 nuclide | GEOS-Chem v2-02 |
Pb210 | Pb210 | Lead-210 nuclide | GEOS-Chem v2-02 |
Pb210Strat | Pb210Strat | Lead-210 produced in the stratosphere | GEOS-Chem 12.2.0 |
Be7 | Be7 | Beryllium-7 nuclide | GEOS-Chem v2-02 |
Be7Strat | Be7Strat | Berylium-7 produced in the stratosphere
|
GEOS-Chem 12.2.0 |
Be10 | Be10 | Beryllium-10 nuclide
|
GEOS-Chem 12.2.0 |
Be10Strat | Be10Strat | Beryllium-10 produced in the stratosphere
|
GEOS-Chem 12.2.0 |
PassiveTracer | N/A | Passive tracer with initial concentration of 100 ppb (no emissions or decay)
|
GEOS-Chem 12.2.0 |
SF6tracer | SF6 | Sulfur hexafluoride with anthropogenic emissions from EDGAR v4.2
|
GEOS-Chem 12.2.0 |
CH3Itracer | CH3I | Methyl iodide with emissions over the oceans of 1 molec/cm2/s and a 5-day lifetime
|
GEOS-Chem 12.2.0 |
COAnthroEmis25dayTracer | CO_25 | CO tracer with anthropogenic emissions from CEDS and a 25-day lifetime | GEOS-Chem 12.2.0 |
COAnthroEmis50dayTracer | CO_50 | CO tracer with anthropogenic emissions from CEDS and a 50-day lifetime | GEOS-Chem 12.2.0 |
COUniformEmis25dayTracer | Uniform | CO tracer with uniform surface emissions of 2400 Tg/yr and a 25-day lifetime
|
GEOS-Chem 12.2.0 |
GlobEmis90dayTracer | e90 | Tracer emitted globally at the surface such that the mixing ratio is 100 ppbv and has a 90-day lifetime | GEOS-Chem 12.2.0 |
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 12.2.0 |
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 12.2.0 |
AgeOfAir | aoa, Clock | Age of air [s]
|
GEOS-Chem 12.2.0 |
TBD | nh_5 | Northern Hemisphere 5 day tracer | TBD |
TBD | nh_50 | Northern Hemisphere 50 day tracer | TBD |
TBD | sh_5 | Southern Hemisphere 5 day tracer | TBD |
TBD | sh_50 | Southern Hemisphere 50 day tracer | TBD |
TBD | ntr_5 | Northern Hemisphere Subtropical 5 day tracer | TBD |
TBD | ntr_50 | Northern Hemisphere Subtropical 50 day tracer | TBD |
TBD | str_5 | Southern Hemisphere Subtropical 5 day tracer | TBD |
TBD | str_50 | Southern Hemisphere Subtropical 50 day tracer | TBD |
TBD | tr_5 | Tropical 5 day tracer | TBD |
TBD | tr_50 | Tropical 50 day tracer | TBD
|
TBD | st80_25 | Stratospheric source 25 day tracer | TBD |
TBD | oNpbl | Origin tracer for 45N-90N and surface to ~800 hPa | TBD |
TBD | oSpbl | Origin tracer for 45S-90S and surface to ~800 hPa | TBD |
TBD | oStrat | Origin tracer for the stratosphere | TBD |
Implementation in GEOS-Chem
Several of the GEOS tracers listed above have been added as 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
Species name : SF6tracer
Species name : CH3Itracer
Species name : COAnthroEmis25dayTracer
Species name : COAnthroEmis50dayTracer
Species name : COUniformEmis25dayTracer
Species name : GlobEmis90dayTracer
Species name : NHEmis90dayTracer
Species name : SHEmis90dayTracer
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
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
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 Transport 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', ::
--Melissa Sulprizio (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, J. Geophys. Res. Atmos., 118, 1459–1470, doi:10.1002/jgrd.50133.
--Melissa Sulprizio (talk) 18:42, 23 February 2018 (UTC)