Difference between revisions of "Transport Working Group"

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(Common set of tracers in GEOS-Chem and GEOS)
(Current GEOS-Chem Transport Issues)
 
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!width="300px" bgcolor="#CCCCCC"|Transport Working Group Co-Chairs
 
!width="300px" bgcolor="#CCCCCC"|Transport Working Group Co-Chairs
 
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*[mailto:andrea.m.molod@nasa.gov Andrea Molod] and
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*[https://www.cira.colostate.edu/staff/schuh-andrew/ Andrew Schuh] (Github: [https://github.com/aschuh @aschuh])
*[http://research.nianet.org./~hyl/ Hongyu Liu]
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*[https://science.larc.nasa.gov/people/katherine-travis/ Katie Travis] (Github: [https://github.com/ktravis213 @ktravis213])
  
 
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*Click on '''Leave this group'''
 
*Click on '''Leave this group'''
 
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--[[User:Bmy|Bob Y.]] ([[User talk:Bmy|talk]]) 18:38, 21 August 2015 (UTC)
 
  
 
== 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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|NASA GMAO<br>Harvard
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|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
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|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]
 
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|Harvard
 
|Examining the effect of grid resolution on vertical transport and convective mass fluxes
 
|[mailto:karenyu@g.harvard.edu Karen Yu]
 
 
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|Harvard
 
|Quantifying the impact of numerical diffusion on plume transport and comparing to observed atmospheric diffusion
 
|[mailto:seastham@fas.harvard.edu Sebastian D. Eastham]
 
 
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|Harvard
 
|Assessing the co-benefits of increasing vertical and horizontal grid resolutions for tracer transport
 
|[mailto:jiaweizhuang@g.harvard.edu Jiawei Zhuang]
 
  
 
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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]
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|[mailto:bo.zhang@nianet.org Bo Zhang]<br>[mailto:hongyu.liu-1@nasa.gov Hongyu Liu]
 
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|Harvard
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|Vertical resolution needs for GEOS-Chem global transport
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|[[User:Ada Shaw|Ada Shaw]]
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|Harvard<br>U. Toronto
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|Re-diagnosed convection in off-line GEOS-Chem
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|[[User:Bmy|Bob Yantosca]]<br>Tailong He
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== Current GEOS-Chem Transport Issues ==
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== Related pages ==
 
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Text to be added
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== Common set of tracers in GEOS-Chem and GEOS ==
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<span style="color:darkorange">'''''This update will be included in [[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]].'''''</span>
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The Transport Working Group has proposed implementing additional tracers in GEOS-Chem for benchmarking purposes and diagnosing transport in GEOS-Chem compared to GEOS-5. The [[#List of tracers in GEOS|list of tracers in GEOS]] is provided below and 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]].
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=== List of tracers in GEOS ===
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17 GMI tracers: https://gmi.gsfc.nasa.gov/uploads/files/gmi_tracersuite.pdf
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Additional Tracers in GEOS - used in part to get an age spectrum
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# Name    Units        Long Name
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# -----    ------      --------------------------------
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nh_5      'mol mol-1'  Northern Hemisphere 5 day tracer
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nh_50    'mol mol-1'  Northern Hemisphere 50 day tracer
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sh_5      'mol mol-1'  Southern Hemisphere 5 day tracer
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sh_50    'mol mol-1'  Southern Hemisphere 50 day tracer
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ntr_5    'mol mol-1'  Northern Hemisphere Subtropical 5 day tracer
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ntr_50    'mol mol-1'  Northern Hemisphere Subtropical 50 day tracer
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str_5    'mol mol-1'  Southern Hemisphere Subtropical 5 day tracer
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str_50    'mol mol-1'  Southern Hemisphere Subtropical 50 day tracer
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tr_5      'mol mol-1'  Tropical 5 day tracer
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tr_50    'mol mol-1'  Tropical 50 day tracer
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e90      'mol mol-1'  Constant emission 90 day tracer
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e90_n    'mol mol-1'  Constant emission Northern Hemisphere 90 day tracer
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e90_s    'mol mol-1'  Constant emission Southern Hemisphere 90 day tracer
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st80_25  'mol mol-1'  Stratospheric source 25 day tracer
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aoa_nh    'days'        Age of air tracer (Northern Hemisphere surface source)
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::
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and a few others
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CH3I      'mol mol-1'  Methyl iodide
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CO_50_na  'mol mol-1'  Anthro CO North America 50 day tracer
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--[[User:Lizzie Lundgren|Lizzie Lundgren]] ([[User talk:Lizzie Lundgren|talk]]) 15:41, 15 June 2018 (UTC)
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=== Origin tracers ===
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'''''Chris Holmes wrote:'''''
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: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.
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: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.
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:'''Reference'''
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: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.
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--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 18:42, 23 February 2018 (UTC)
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=== Implementation in GEOS-Chem ===
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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:
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%%% ADVECTED SPECIES MENU %%%:
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Type of simulation      : 1
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Species Entries ------->: Name
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Species name            : Rn222
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Species name            : Pb210
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Species name            : Pb210Strat
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Species name            : Be7
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Species name            : Be7Strat
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Species name            : Be10
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Species name            : Be10Strat
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Species name            : Passive
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<span style="color:green">Species name            : TR_SF6
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Species name            : TR_CH3I
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Species name            : TR_CO_25
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Species name            : TR_CO_50
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Species name            : TR_e90
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Species name            : TR_e90_N
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Species name            : TR_e90_S
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Species name            : TR_Uniform
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Species name            : TR_Clock</span>
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where <tt>TR_</tt> denotes that these species are from TR_GridComp of GEOS. In the passive species menu of input.geos, each species is defined along with the molecular weight, lifetime, default background concentration, and long name.
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%%% PASSIVE SPECIES MENU %%%:
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Passive species name    : Passive    1.0    -1      1.0e-7  Passive_tracer_for_mass_conservation_eval
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<span style="color:green">Passive species name    : TR_SF6    146.0  1.0e11  1.0e-20  Sulfur_hexafluoride
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Passive species name    : TR_CH3I    142.0  4.32e5  1.0e-20  Methyl_iodide
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Passive species name    : TR_CO_25  28.0  2.16e6  1.0e-20  Anthro_CO_25day_tracer
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Passive species name    : TR_CO_50  28.0  4.32e6  1.0e-20  Anthro_CO_50day_tracer
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Passive species name    : TR_e90    1.0    7.776e6 1.0e-20  Constant_emission_tracer
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Passive species name    : TR_e90_N  1.0    7.776e6 1.0e-20  Constant_emission_tracer_for_NH
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Passive species name    : TR_e90_S  1.0    7.776e6 1.0e-20  Constant_emission_tracer_for_SH
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Passive species name    : TR_Uniform 28.0  2.16e6  1.0e-20  CO-like_tracer_with_uniform_emission
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Passive species name    : TR_Clock  1.0    -1      0.0      Age_of_air_in_seconds</span>
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Species with an emissions flux also have a corresponding entry in the HEMCO_Config.rc file.
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#==============================================================================
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# SF6 emissions from EDGAR v4.2
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#==============================================================================
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0 SRC_2D_SF6  /n/regal/jacob_lab/msulprizio/v42_SF6_2008-1970_IPCC_2_nc/v2019-01/EDGAR_v42_SF6_IPCC_2.generic.01x01.nc emi_sf6 1970-2008/1-12/1/0 C xy kg/m2/s TR_SF6 - 1 1
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#==============================================================================
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# CH3I emitted over the oceans at rate of 1 molec/cm2/s
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#==============================================================================
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0 SRC_2D_CH3I 1.0 - - - xy molec/cm2/s TR_CH3I 1000 1 1
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#==============================================================================
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# Anthropogenic CO 25-day and 50-day tracers
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#==============================================================================
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_ENE  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_IND  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_TRA  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_RCO  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_SLV  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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0 CEDS_CO_25_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 TR_CO_25  26 1/2/12 5
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0 CEDS_CO_50_WST  -                                                          -      -                  - -  -      TR_CO_50  26 1/2/12 5
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#==============================================================================
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# e90 tracer is emitted with a uniform flux of 100 ppbv
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#==============================================================================
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0 SRC_2D_e90  100 - - - xy ppbv TR_e90  -    1 1
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0 SRC_2D_e90n  100 - - - xy ppbv TR_e90_N 1001 1 1
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0 SRC_2D_e90s  100 - - - xy ppbv TR_e90_S 1002 1 1
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#==============================================================================
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# Uniform surface emission of 2400 Tg/yr
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#==============================================================================
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0 SRC_2D_Uniform 1.5e-7 - - - xy kg/m2/s TR_Uniform - 1 1
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...
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1000 OCEAN_MASK $METDIR/$CNYR/01/$MET.$CNYR0101.CN.$RES.$NC FROCEAN 2000/1/1/0 C xy 1 1 -180/-90/180/90
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1001 NH_MASK    -180/0/180/90  - 2000/1/1/0 C xy 1 1 -180/0/180/90
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1002 SH_MASK    -180/-90/180/0 - 2000/1/1/0 C xy 1 1 -180/-90/180/0
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--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 13:12, 4 January 2019 (UTC)
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*[[TransportTracers simulation]]

Latest revision as of 17:15, 24 October 2023

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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
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
Add yours here!    

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