TransportTracers simulation: Difference between revisions

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== Overview ==
== Overview ==


The Rn-Pb-Be simulation in GEOS-Chem was based on that of the old Harvard/GISS CTM model. The current simulation follows [http://acmg.seas.harvard.edu/publications/2001/liu2001.pdf Liu et al (2001)].   
The Rn-Pb-Be simulation in GEOS-Chem was based on that of the old Harvard/GISS CTM model. The current simulation follows [http://acmg.seas.harvard.edu/publications/2001/liu2001.pdf Liu et al (2001)].   


The standard Rn-Pb-Be simulation uses the following tracers:
In [[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]] the Rn-Pb-Be simulation was extended to include additional passive species for benchmarking purposes and for diagnosing transport in GEOS-Chem. At this time the simulation was renamed to the **TransportTracer simulation**.


#Rn<sup>222</sup>, which is emitted naturally from soils
In [[GEOS-Chem 14.2.0]] the TransportTracers simulation was further modified so that species names and definitions are now consistent with GMAO's tracer gridded component (aka TR_GridComp). This will facilitate comparison of transport within GEOS-Chem, GCHP, and GEOS.
#Pb<sup>210</sup>, which is the primary decay product of Rn<sup>222</sup>
#Be<sup>7</sup>, which is produced by cosmic rays in the stratosphere and upper atmosphere
#Be<sup>10</sup>, which is produced by cosmic rays in the stratosphere and upper atmosphere '''(introduced in [[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]])'''
#Plus several [[Transport_Working_Group#Transport_Tracers_simulation|passive species]] used to diagnose transport


This simulation is most frequently used to validate the convection, advection, and wet scavenging processes in GEOS-Chem.


=== Zhang et al 2021 source of Rn222 ===
=== List of species ===


In [[GEOS-Chem 13.4.0]] and later versions, a new Radon source function based on [https://acp.copernicus.org/articles/21/1861/2021/ Zhang et al., 2021] was implemented.  This is now the default emission source.
The transport tracers are summarized below.


=== Jacob et al 1997 source of Rn222 ===
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="200px"|Species name
!width="200px"|Description
!width="400px"|Source
!width="400px"|Sink
!width="200px"|Purpose


The Rn222 emissions source based on Jacob et al., 1997 was replaced by the [[#Zhang et al 2021 source|Zhang et al., 2021 source]] (in  [[GEOS-Chem 13.4.0]]). It still may be used as a research option.
|-valign="top"
 
|Rn222
{| border=1 cellspacing=0 cellpadding=5
|Radon-222 isotope
|-valign="top" bgcolor="#CCCCCC"
|
!width="100px"|Latitudes
*Emitted naturally from soils based on [https://acp.copernicus.org/articles/21/1861/2021/ Zhang et al., 2021].
!width="500px"|Rn<sup>222</sup> Emission
|
*Half-life of 3.83 days (Liu at al., 2001).
**Decays into Pb<sup>210</sup> according to the exponential law:
::<tt>EXP( -&Delta;T * 2.097d-6  )</tt>
|Used to evaluate convection over land and strat-trop exchange


|-valign="top"
|-valign="top"
| 90&deg;N - 70&deg;N
|Pb210
|Lead-210 isotope
|
*Radioactive decay from Rn<sup>222</sup> according to the exponential law:
::<tt>EXP( -&Delta;T * 2.097d-6  )</tt>
::Where &Delta;T is the emission timestep in seconds.
|
|
*Everywhere: <tt>0.0 atoms/cm2/s</tt>
*Half-life of 22.3 years (Liu et al., 2001).
**Decays according to the exponential law:
::<tt>EXP( -&Delta;T * 9.725d-10 )</tt>
*Wet deposition
*Dry deposition
|Used to evaluate wet scavenging and transport


|-valign="top"
|-valign="top"
|70&deg;N - 60&deg;N
|Pb210s
|
|Lead-210 isotope stratospheric-source tracer
*Everywhere: <tt>0.005 atoms/cm2/s</tt>
|Same as Pb210 (restricted to the stratosphere)
*Reduce emissions by a factor of 3 where surface temperature < 0&deg; C
|Same as Pb210
|Used to evaluate strat-trop exchange


|-valign="top"
|-valign="top"
|60&deg;N - 60&deg;S
|Be7
|Beryllium-7 isotope
|
*Produced by cosmic rays as described in [https://link.springer.com/chapter/10.1007/978-3-642-46079-1_7 Lal and B. Peters, 1967]
*Plus the following modifications from Liu et al. (2001):
#Replace data at (0 hPa altitude, 70&deg;S latitude) following Koch (1996):
#*old value = <tt>3000 disintegrations/g air/s</tt>
#*new value = <tt>1900 disintegrations/g air/s</tt>
#The original Lal & Peters data ended at 70&deg;S
#*Copy the data values at 70&deg;S to 80&deg;S and 90&deg;S at all levels
|
|
*Over land: <tt>1 atom/cm2/s</tt>
*Half-life of 53.3 days (Liu et al., 2001).
*Over oceans: <tt>0.005 atoms/cm2/s</tt>
**Decays according to the exponential law:
*Reduce emissions by a factor of 3 where surface temperature < 0&deg; C
::<tt>EXP( -&Delta;T * 1.506d-7  )</tt>
*Wet deposition
*Dry deposition
|Used to evaluate wet scavenging and strat-trop exchange


|-valign="top"
|-valign="top"
|60&deg;S - 70&deg;S
|Be7s
|
|Beryllium-7 isotope stratospheric source tracer
*Everywhere: <tt>0.005 atoms/cm2/s</tt>
|Same as Be7 (restricted to the stratosphere)
*Reduce emissions by a factor of 3 where surface temperature < 0&deg; C
|Same as Be7
|Used to evaluate strat-trop exchange


|-valign="top"
|-valign="top"
| 70&deg;S - 90&deg;S
|Be10
|Beryllium-10 isotope
|
*Be<sup>10</sup> has an identical source distribution as Be<sup>7</sup> following Koch and Rind (1998).
|
|
*Everywhere: <tt>0.0 atoms/cm2/s</tt>
*Half-life of 5.84e8 days (Koch and Rind, 1998).
|}
**Decays according to the exponential law:
::<tt>EXP( -&Delta;T * 1.506d-7  )</tt>
*Wet deposition
*Dry deposition
|Used to evaluate wet scavenging and strat-trop exchange


=== Pb210, Be7, and Be10 sources ===
|-valign="top"
|Be10s
|Beryllium-10 isotope stratospheric source tracer
|Same as Be10 (restricted to the stratosphere)
|Same as Be10
|Used to evaluate strat-trop exchange


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|PassiveTracer
!width="100px"|Species
|Passive tracer with initial concentration of 100 ppb
!width="500px"|Chemical source
|None
|None
|Used to evaluate mass conservation in transport


|-valign="top"
|-valign="top"
|<tt>Pb210</tt>
|SF6
|Radioactive decay from Rn<sup>222</sup> according to the exponential law:
|Sulfur hexafluoride
*<tt>EXP( -&Delta;T * 2.097d-6  )</tt>
|Anthropogenic emissions from EDGAR v4.2
Where &Delta;T is the emission timestep in seconds.
|None
|Used to evaluate inter-hemispheric transport of anthropogenic emissions


|-valign="top"
|-valign="top"
|<tt>Be7</tt><br><tt>Be7Strat</tt>
|CH3I
|The source of Be<sup>7</sup> is taken from the following reference:
|Methyl iodide
*Lal, D., and B. Peters, ''Cosmic ray produced radioactivity on the Earth''. <u>Handbuch der Physik</u>, '''46'''/2, 551-612, edited by K. Sitte, Springer-Verlag, New York, 1967.
|Emissions over the oceans of 1 molec/cm2/s
|5-day e-folding lifetime
|Used to evaluate marine convection


with the following modifications from Liu et al. (2001):
|-valign="top"
#Replace data at (0 hPa altitude, 70&deg;S latitude) following Koch (1996):
|CO_25
#*old value = <tt>3000 disintegrations/g air/s</tt>
|Anthropogenic CO 25-day tracer
#*new value = <tt>1900 disintegrations/g air/s</tt>
|Emissions from CEDS v2
#The original Lal & Peters data ended at 70&deg;S
|25-day e-folding lifetime
#*Copy the data values at 70&deg;S to 80&deg;S and 90&deg;S at all levels
|


|-valign="top"
|-valign="top"
|<tt>Be10</tt><br><tt>Be10</tt>
|CO_50
|Be<sup>10</sup> has an identical source distribution as Be<sup>7</sup> following Koch and Rind (1998).
|Anthropogenic CO 50-day tracer
|Emissions from CEDS v2
|50-day e-folding lifetime
|


|}
|-valign="top"
|e90
|Constant burden 90-day tracer
|Emitted globally at the surface such that the mixing ratio is maintained at 100 ppbv
|90-day e-folding lifetime
|


--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 13:43, 20 September 2022 (UTC)
|-valign="top"
|e90_n
|Constant burden Northern Hemisphere 90-day tracer
|Emitted at the surface such that the mixing ratio is maintained at 100 ppbv. Emissions source is restricted to 40N - 90N.
|90-day e-folding lifetime
|


=== Sinks ===
|-valign="top"
|e90_s
|Constant burden Southern Hemisphere 90-day tracer
|Emitted at the surface such that the mixing ratio is maintained at 100 ppbv. Emissions source is restricted to 90S - 40S.
|90-day e-folding lifetime
|


The table below shows the sinks for Rn<sup>222</sup>, Pb<sup>210</sup>, and Be<sup>7</sup>.  In the equations below, &Delta;T is the emission timestep in seconds.
|-valign="top"
|aoa
|Age of air uniform source tracer
|Increases by a value of 1 each emissions timestep
|Sink at the surface
|Used for evaluating residual circulation and mixing


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|aoa_bl
!width="100px"|Species
|Age of air uniform source tracer with sink restricted to the boundary layer
!width="400px"|Chemical sink
|Increases by a value of 1 each emissions timestep
!width="50px"|Drydep?
|Sink in the boundary layer
!width="50px"|Wetdep?
|Used for evaluating residual circulation and mixing


|-valign="top"
|-valign="top"
|<tt>Rn222</tt>
|aoa_nh
|Half-life of 3.83 days (Liu at al., 2001).
|Age of air uniform source tracer with sink restricted to a zone in the Northern Hemisphere
Decays into Pb<sup>210</sup> according to the exponential law:
|Increases by a value of 1 each emissions timestep
*<tt>EXP( -&Delta;T * 2.097d-6  )</tt>
|Sink at 30N - 50N
|no
|Used for evaluating residual circulation and mixing
|no


|-valign="top"
|-valign="top"
|<tt>Pb210</tt>
|nh_5
|Half-life of 22.3 years (Liu et al., 2001).
|Northern Hemisphere 5-day tracer
Decays according to the exponential law:
|Constant source of 100 ppbv at latitudes 30N - 50N
*<tt>EXP( -&Delta;T * 9.725d-10 )</tt>
|5-day e-folding lifetime
|yes
|
|yes


|-valign="top"
|-valign="top"
|<tt>Be7</tt><br><tt>Be7Strat</tt>
|nh_50
|Half-life of 53.3 days (Liu et al., 2001).
|Northern Hemisphere 50-day tracer
Decays according to the exponential law:
|Constant source of 100 ppbv at latitudes 30N - 50N
*<tt>EXP( -&Delta;T * 1.506d-7  )</tt>
|50-day e-folding lifetime
|yes
|
|yes


|-valign="top"
|-valign="top"
|<tt>Be10</tt><br><tt>Be10Strat</tt>
|st80_25
|Half-life of 5.84e8 days (Koch and Rind, 1998).
|Stratospheric source 25-day tracer
Decays according to the exponential law:
|Constant source of 200 ppbv above 80 hPa
*<tt>EXP( -&Delta;T * 1.506d-7  )</tt>
|25-day e-folding lifetime
|yes
|
|yes
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 13:46, 20 September 2022 (UTC)


== Non-local PBL mixing ==
== Non-local PBL mixing ==

Revision as of 15:03, 24 October 2023

Previous | Next | Guide to GEOS-Chem simulations

  1. Simulations using KPP-built mechanisms
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  5. Hg simulation
  6. POPs simulation
  7. Tagged CO simulation
  8. Tagged O3 simulation
  9. TransportTracers simulation


This page contains information about the Radon-Lead-Beryllium (and optional passive species) simulation in GEOS-Chem.

Overview

The Rn-Pb-Be simulation in GEOS-Chem was based on that of the old Harvard/GISS CTM model. The current simulation follows Liu et al (2001).

In GEOS-Chem 12.2.0 the Rn-Pb-Be simulation was extended to include additional passive species for benchmarking purposes and for diagnosing transport in GEOS-Chem. At this time the simulation was renamed to the **TransportTracer simulation**.

In GEOS-Chem 14.2.0 the TransportTracers simulation was further modified so that species names and definitions are now consistent with GMAO's tracer gridded component (aka TR_GridComp). This will facilitate comparison of transport within GEOS-Chem, GCHP, and GEOS.


List of species

The transport tracers are summarized below.

Species name Description Source Sink Purpose
Rn222 Radon-222 isotope
  • Half-life of 3.83 days (Liu at al., 2001).
    • Decays into Pb210 according to the exponential law:
EXP( -ΔT * 2.097d-6 )
 Used to evaluate convection over land and strat-trop exchange
Pb210 Lead-210 isotope
  • Radioactive decay from Rn222 according to the exponential law:
EXP( -ΔT * 2.097d-6 )
Where ΔT is the emission timestep in seconds.
  • Half-life of 22.3 years (Liu et al., 2001).
    • Decays according to the exponential law:
EXP( -ΔT * 9.725d-10 )
  • Wet deposition
  • Dry deposition
 Used to evaluate wet scavenging and transport
Pb210s Lead-210 isotope stratospheric-source tracer Same as Pb210 (restricted to the stratosphere) Same as Pb210 Used to evaluate strat-trop exchange
Be7 Beryllium-7 isotope
  • Produced by cosmic rays as described in Lal and B. Peters, 1967
  • Plus the following modifications from Liu et al. (2001):
  1. Replace data at (0 hPa altitude, 70°S latitude) following Koch (1996):
    • old value = 3000 disintegrations/g air/s
    • new value = 1900 disintegrations/g air/s
  2. The original Lal & Peters data ended at 70°S
    • Copy the data values at 70°S to 80°S and 90°S at all levels
  • Half-life of 53.3 days (Liu et al., 2001).
    • Decays according to the exponential law:
EXP( -ΔT * 1.506d-7 )
  • Wet deposition
  • Dry deposition
 Used to evaluate wet scavenging and strat-trop exchange
Be7s Beryllium-7 isotope stratospheric source tracer Same as Be7 (restricted to the stratosphere) Same as Be7 Used to evaluate strat-trop exchange
Be10 Beryllium-10 isotope
  • Be10 has an identical source distribution as Be7 following Koch and Rind (1998).
  • Half-life of 5.84e8 days (Koch and Rind, 1998).
    • Decays according to the exponential law:
EXP( -ΔT * 1.506d-7 )
  • Wet deposition
  • Dry deposition
 Used to evaluate wet scavenging and strat-trop exchange
Be10s Beryllium-10 isotope stratospheric source tracer Same as Be10 (restricted to the stratosphere) Same as Be10 Used to evaluate strat-trop exchange
PassiveTracer Passive tracer with initial concentration of 100 ppb None None Used to evaluate mass conservation in transport
SF6 Sulfur hexafluoride Anthropogenic emissions from EDGAR v4.2 None Used to evaluate inter-hemispheric transport of anthropogenic emissions
CH3I Methyl iodide Emissions over the oceans of 1 molec/cm2/s 5-day e-folding lifetime Used to evaluate marine convection
CO_25 Anthropogenic CO 25-day tracer Emissions from CEDS v2 25-day e-folding lifetime
CO_50 Anthropogenic CO 50-day tracer Emissions from CEDS v2 50-day e-folding lifetime
e90 Constant burden 90-day tracer Emitted globally at the surface such that the mixing ratio is maintained at 100 ppbv 90-day e-folding lifetime
e90_n Constant burden Northern Hemisphere 90-day tracer Emitted at the surface such that the mixing ratio is maintained at 100 ppbv. Emissions source is restricted to 40N - 90N. 90-day e-folding lifetime
e90_s Constant burden Southern Hemisphere 90-day tracer Emitted at the surface such that the mixing ratio is maintained at 100 ppbv. Emissions source is restricted to 90S - 40S. 90-day e-folding lifetime
aoa Age of air uniform source tracer Increases by a value of 1 each emissions timestep Sink at the surface Used for evaluating residual circulation and mixing
aoa_bl Age of air uniform source tracer with sink restricted to the boundary layer Increases by a value of 1 each emissions timestep Sink in the boundary layer Used for evaluating residual circulation and mixing
aoa_nh Age of air uniform source tracer with sink restricted to a zone in the Northern Hemisphere Increases by a value of 1 each emissions timestep Sink at 30N - 50N Used for evaluating residual circulation and mixing
nh_5 Northern Hemisphere 5-day tracer Constant source of 100 ppbv at latitudes 30N - 50N 5-day e-folding lifetime
nh_50 Northern Hemisphere 50-day tracer Constant source of 100 ppbv at latitudes 30N - 50N 50-day e-folding lifetime
st80_25 Stratospheric source 25-day tracer Constant source of 200 ppbv above 80 hPa 25-day e-folding lifetime

Non-local PBL mixing

Capability to use the non-local PBL mixing scheme was added in GEOS-Chem v9-02. Code updates were provided by Jintai Lin.

Karen Yu evaluated the non-local PBL mixing scheme in the Rn-Pb-Be simulation using GEOS-5 and GEOS-FP met fields. Please see these plots comparing the simulation with and without the non-local PBL mixing scheme.

--Bob Yantosca (talk) 16:43, 8 January 2016 (UTC)

1-year benchmark simulations

Benchmark overview

1-year Rn-Pb-Be benchmark simulations are completed at the request of the Transport Working Group or whenever an update is introduced into the code that will impact transport and/or wet deposition. Each of these benchmarks involve a 4-year spinup period, followed by the 1-year run used for evaluation.

Benchmark plots

Version Link
12.8.0
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/GC_12/12.8.0/
12.2.0
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/GC_12/12.2.0/TransportTracers/output/
v11-02e
w/ GEOS-FP (2016 met) 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-02/v11-02e/RnPbBePasv-Run2/NLPBL/output/
v11-02e
w/ GEOS-FP (72 levels) 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-02/v11-02e/RnPbBePasv-Run1/NLPBL/output/
v11-02e
w/ GEOS-FP (2013 met) 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-02/v11-02e/RnPbBePasv-Run0/NLPBL/output/
v11-02b
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-02/v11-02b/RnPbBePasv/RnPbBePasv_VDIFF/output/
v11-01i
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01i/RnPbBePasv/RnPbBePasv_VDIFF/output/
v11-01h
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01h/RnPbBePasv/RnPbBePasv_VDIFF/output/
v11-01f
w/ MERRA-2 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01f/MERRA2/RnPbBe/RnPbBePasv_VDIFF/output/
v11-01f
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01f/GEOSFP/RnPbBe/RnPbBePasv_VDIFF/output/
v11-01d
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01d/RnPbBe/RnPbBePasv_VDIFF/output/
v11-01b
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v11-01/v11-01b/RnPbBe/output/
v10-01
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01-public-release/RnPbBe/output/
v9-02r
w/ GEOS-FP 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v9-02/v9-02r/geosfp/RnPbBe/output/pdf/
v9-02r
w/ GEOS-5 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v9-02/v9-02r/geos5/RnPbBe/output/pdf/
v9-01-03e
w/ GEOS-5 		http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v9-01-03/v9-01-03e/geos5/2005/RnPbBe/output/pdf/
v9-01-02
w/ GEOS-5 		http://wiki.seas.harvard.edu/geos-chem/index.php/Rn-Pb-Be_simulation#Comparison_plots

Budget of Pb210

In this table we plot the budgets of Pb210 obtained from 1-year benchmark simulations at 4° x 5° resolution done with various GEOS-Chem versions.

Version Met Field Year Tropospheric burden [g] Tropospheric lifetime against deposition [days] Sources [g day -1] Sinks [g day-1]
From Stratosphere From Troposphere Dry Deposition Wet Deposition Radioactive decay
Total Stratiform Convective
12.8.0
(with Luo2019 wetdep) 		GEOS-FP (72L) 2016 105.1827 3.2461 0.2690 32.1142 2.3068 30.0303 25.4236 4.6067 0.0088608
12.8.0 GEOS-FP (72L) 2016 211.6465 6.5363 0.2690 32.1142 3.9521 28.4142 19.9437 8.4705 0.0178018
12.2.0 GEOS-FP (72L) 2016 218.330 6.71344 0.236801 32.2602 3.95678 28.5218 20.0439 8.47787 0.0183735
v11-02e GEOS-FP (72L) 2016 217.941 6.71192 0.224000 32.2206 3.94971 28.4770 20.0147 8.46232 0.0183407
v11-02e GEOS-FP (72L) 2013 229.338 7.10583 0.219856 32.0661 3.90212 28.3646 19.9166 8.44793 0.0192987
v11-02e GEOS-FP 2013 229.338 7.10583 0.219864 32.0661 3.90212 28.3646 19.9166 8.44793 0.0192987
v11-02b GEOS-FP 2013 229.061 7.09725 0.219669 32.0661 3.93661 28.3299 19.8931 8.43679 0.0192754
v11-01i GEOS-FP 2013 229.335 7.10581 0.219894 32.0656 3.90206 28.3642 19.9163 8.44786 0.0192984
v11-01h GEOS-FP 2013 205.551 6.37603 0.200768 32.0656 3.32588 28.9232 22.2968 6.62642 0.0173020
v11-01f MERRA-2 2013 199.426 6.20202 0.237400 31.9437 3.26365 28.9007 21.7525 7.14814 0.0167875
v11-01f GEOS-FP 2013 204.931 6.37746 0.225323 31.9356 3.32210 28.8216 22.2060 6.61553 0.0172499
v11-01d GEOS-FP 2013 210.371 6.54296 0.225956 31.9538 3.41587 28.7451 21.9070 6.83813 0.0177696
v11-01b GEOS-FP 2013 212.655 6.60214 0.228550 31.9528 3.49478 28.6686 22.0420 6.62657 0.0179612
v10-01 GEOS-FP 2013 250.912 7.77516 0.0832825 32.2152 3.51910 28.7582 22.0207 6.73749 0.0211769
v9-02r GEOS-FP 2012/2013 247.630 7.71356 0.143133 31.9904 3.15887 28.9538 22.5351 6.41867 0.0208565
v9-02r GEOS-5 2012/2013 305.699 9.25835 0.419521 32.6109 3.42747 29.5772 20.2059 9.37127 0.0257354
v9-01-03e GEOS-5 2005 314.790 9.51050 0.128670 32.9831 3.48612 29.5991 20.8285 8.77061 0.0265495
v9-01-02 GEOS-5 2005 317.884 9.60957 0.121441 32.9831 3.49208 29.5857 19.5148 10.0709 0.0268078
v9-01-01 GEOS-5 2005 316.253 9.55568 0.129852 32.9831 3.66397 29.4223 19.4090 10.0134 0.0251665
v8-03-02 GEOS-5 2005 298.318 9.01288 0.129642 32.9831 3.21013 29.8775 21.3283 8.54923 0.0266710

NOTES:

  • Bolded text denotes change in meteorology product and/or meteorology year.
  • The simulations that utilized GEOS-5 met fields were done for year 2005, with a 4-year spinup. (Computed by Hongyu Liu)
  • The benchmark simulations for v9-02r were done for June 2012–May 2013, with a 2-month spinup. This was due to data availability of the GEOS-FP met fields at the time of the simulation. (Completed by Karen Yu)
  • The simulations for GEOS-Chem v10-01 and later versions utilized GEOS-FP met fields for the year 2013, with a 4-year spinup. The results reported here are for simulations using the non-local PBL mixing (VDIFF) scheme. (Completed by the GEOS-Chem Support Team)
  • The simulations for GEOS-Chem 12.2.0 and later versions utilized GEOS-FP met fields for the year 2016, with a 10-year spinup. The results reported here are for simulations using the non-local PBL mixing (VDIFF) scheme. (Completed by the GEOS-Chem Support Team)
  • Hongyu Liu and Bo Zhang are investigating the low Pb tropospheric lifetime against deposition observed in v11-01b using GEOS-FP. A quick fix was tested in v11-01d, but subsequently removed because of the high impact on aerosols. For more information, see this discussion on the Wet deposition wiki page.

Budget of Be7

In this table we plot the budgets of Be7 obtained from 1-year benchmark simulations at 4° x 5° resolution done with various GEOS-Chem versions.

Version Met Field Year Tropospheric burden [g] Tropospheric lifetime against deposition [days] Sources [g day -1] Sinks [g day-1]
From Stratosphere From Troposphere Dry Deposition Wet Deposition Radioactive decay
Total Stratiform Convective
12.8.0
(with Luo2019 wetdep) 		GEOS-FP (72L) 2016 1.1882 9.5228 0.2882 0.1149 0.0052 0.1188 0.1029 0.0159 0.0154770
12.8.0 GEOS-FP (72L) 2016 2.8927 20.5842 0.2882 0.1149 0.0095 0.1305 0.1047 0.0258 0.0376572
12.2.0 GEOS-FP (72L) 2016 3.55540 24.5959 0.0541444 0.136303 0.00952537 0.134645 0.108871 0.0257736 0.0462768
v11-02e GEOS-FP (72L) 2016 3.56036 24.6000 0.0543652 0.136303 0.00955045 0.134776 0.108970 0.0258063 0.0463413
v11-02e GEOS-FP (72L) 2013 3.50286 24.9516 0.0529614 0.132687 0.0102709 0.129784 0.103733 0.0260514 0.0455928
v11-02e GEOS-FP 2013 3.51047 24.9816 0.0531919 0.132687 0.0102796 0.129907 0.103831 0.0260759 0.0456918
v11-02b GEOS-FP 2013 3.51002 24.9773 0.0531920 0.132688 0.0103364 0.129856 0.103796 0.0260605 0.0456861
v11-01i GEOS-FP 2013 3.51044 24.9815 0.0531920 0.132685 0.0102795 0.129907 0.103831 0.0260760 0.0456914
v11-01h GEOS-FP 2013 3.27337 22.7988 0.0531059 0.132685 0.00626941 0.136914 0.124153 0.0127610 0.0426082
v11-01f MERRA-2 2013 3.12435 21.2728 0.0538848 0.133202 0.00650753 0.139910 0.124784 0.0151255 0.0406699
v11-01f GEOS-FP 2013 3.27720 22.8066 0.0531204 0.132842 0.00628201 0.137021 0.124239 0.0127822 0.0426591
v11-01d GEOS-FP 2013 3.32564 23.2523 0.0530363 0.132914 0.00664940 0.135989 0.122347 0.0136424 0.0433123
v11-01b GEOS-FP 2013 3.33530 23.3408 0.0530463 0.132914 0.00698390 0.135539 0.1228950 0.0126441 0.0434378
v10-01 GEOS-FP 2013 3.98942 30.1194 0.0512072 0.132977 0.00794288 0.124298 0.1101450 0.0141529 0.0519433
v9-02r GEOS-FP 2012/2013 3.41039 25.9787 0.0630964 0.112349 0.00782526 0.123206 0.1093560 0.0138500 0.0444134
v9-02r GEOS-5 2012/2013 3.49564 27.5376 0.0674867 0.104750 0.00881422 0.117906 0.0844566 0.0334494 0.0455165
v9-01-03e GEOS-5 2005 4.37787 34.6750 0.0504472 0.132552 0.00882144 0.117156 0.0858211 0.0393817 0.0570217
v9-01-02 GEOS-5 2005 4.39653 34.8814 0.0504253 0.132552 0.00936374 0.116350 0.0769681 0.0393817 0.0572633
v9-01-01 GEOS-5 2005 4.39407 34.8514 0.0504328 0.132552 0.00969345 0.116060 0.0767926 0.0392671 0.0572312
v8-03-02 GEOS-5 2005 4.31961 33.9930 0.0504585 0.132552 0.00808056 0.118666 0.0846774 0.0339885 0.0562636

NOTES:

  • Bolded text denotes change in meteorology product and/or meteorology year.
  • The simulations that utilized GEOS-5 met fields were done for year 2005, with a 4-year spinup. (Computed by Hongyu Liu)
  • The benchmark simulations for v9-02r were done for June 2012–May 2013, with a 2-month spinup. This was due to data availability of the GEOS-FP met fields at the time of the simulation. (Completed by Karen Yu)
  • The simulations for GEOS-Chem v10-01 and later versions utilized GEOS-FP met fields for the year 2013, with a 4-year spinup. The results reported here are for simulations using the non-local PBL mixing (VDIFF) scheme. (Completed by the GEOS-Chem Support Team)
  • The simulations for GEOS-Chem 12.2.0 and later versions utilized GEOS-FP met fields for the year 2016, with a 10-year spinup. The results reported here are for simulations using the non-local PBL mixing (VDIFF) scheme. (Completed by the GEOS-Chem Support Team)

References

  1. Liu, H., D. Jacob, I. Bey, and R.M. Yantosca, Constraints from 210Pb and 7Be on wet deposition and transport in a global three-dimensional chemical tracer model driven by assimilated meteorological fields, J. Geophys. Res, 106, D11, 12109-12128, 2001.
  2. Jacob et al., Evaluation and intercomparison of global atmospheric transport models using 222Rn and other short-lived tracers, J. Geophys. Res, 102, 5953-5970, 1997.
  3. Koch, D.M., D.J. Jacob, and W.C. Graustein, Vertical transport of tropospheric aerosols as indicated by 7Be and 210Pb in a chemical tracer model, J. Geophys. Res, 101, D13, 18651-18666, 1996.
  4. Koch, D., and D. Rind, Beryllium 10/beryllium 7 as a tracer of stratospheric transport, J. Geophys. Res., 103, D4, 3907-3917, 1998.
  5. Lal, D., and B. Peters, Cosmic ray produced radioactivity on the Earth. Handbuch der Physik, 46/2, 551-612, edited by K. Sitte, Springer-Verlag, New York, 1967.


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