GEOS-Chem species: Wet deposition metadata

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  1. Species in GEOS-Chem
  2. Henry's law parameters
  3. Dry deposition parameters
  4. Wet deposition parameters
  5. GEOS-Chem species database
  6. GEOS-Chem species units
  7. Adding passive species to GEOS-Chem
  8. Species indexing in GEOS-Chem


Overview

Each wet-depositing species in GEOS-Chem contains one or more of the following properties, depending on whether the species is a gas or aerosol:

Properties for aerosol species

Quantity Units Description
WD_Is_HNO3 1 Flag to determine if the species is HNO3.
  • Rainout/washout of HNO3 needs to be handled separately from other gas-phase species.
  • WD_Is_HNO3 will be automatically determined, depending on the value of Name.
WD_Is_SO2 1 Flag to determine if the species is SO2.
  • Rainout/washout of HNO3 separately from other gas-phase species.
  • WD_Is_SO2 will be automatically determined, depending on the value of Name.
WD_Is_H2SO4 1 Flag to determine if the species is H2SO4.
  • Rainout/washout of H2SO4 needs to be handled separately from other gas-phase species.
  • WD_Is_H2SO4 will be automatically determined, depending on the value of Name.
  • H2SO4 is a species in TOMAS aerosol microphysics only.
WD_CoarseAer 1 Set this flag to indicate that the species is a coarse aerosol (i.e. having a radius > 1 μm)
  • Washout of coarse aerosols is handled separately from the washout of fine aerosols.
WD_AerScavEff 1 Specifies the aerosol scavenging efficiency. This factor multiplies F, the fraction of aerosol species that is lost to convective updraft scavenging (cf Eq. 2 of Jacob et al 2000).
  • For most aerosol species, WD_AerScavEff = 1.0.
  • For secondary organic aerosol species, WD_AerScavEff = 0.8.
  • For hydrophobic species (e.g. MOPO), WD_AerScavEff = 0.0.

WD_AerScavEff is applied in routine COMPUTE_F of GEOS-Chem module wetscav_mod.F90.

WD_KcScaleFac 1 Specifies a temperature-dependent scale factor that is used to multiply K (aka Kc), the rate constant for conversion of cloud condensate to precipitation (cf Eq. 1 of Jacob et al, 2000).

WD_KcScaleFac is defined as a 3-element vector, where:

  • WD_KcScaleFac(1) multiplies K when T < 237 K.
  • WD_KcScaleFac(2) multiplies K when 237 K <= T < 258 K.
  • WD_KcScaleFac(3) multiplies K when T >= 258K.

This allows us to better simulate scavenging by snow, where, for most species, we need to halve the K rate when 237 K <= T < 258 K. This can be easily done by setting the value KcScaleFac(2) = 0.5.

WD_KcScaleFac is applied in routine F_AEROSOL of GEOS_Chem module GeosCore/wetscav_mod.F.

WD_RainoutEff 1 Specifies a temperature-dependent scale factor that is used to multiply Fi (aka RAINFRAC), the fraction of species scavenged by rainout (cf Eq. 1 of Jacob et al, 2000).

WD_RainoutEff is defined as a 3-element vector, where:

  • WD_RainoutEff(1) multiplies Fi when T < 237 K.
  • WD_RainoutEff(2) multiplies Fi when 237 K <= T < 258 K.
  • WD_RainoutEff(3) multiplies Fi when T >= 258K.

This allows us to better simulate scavenging by snow and impaction scavenging of BC. For most species, we need to be able to turn off rainout when 237 K <= T < 258 K. This can be easily done by setting RainoutEff(2) = 0.

WD_RainoutEff is applied in routine APPLY_RAINOUT_EFF of GEOS_Chem module GeosCore/wetscav_mod.F.

NOTE: For secondary organic aerosol species, the maximum value of WD_RainoutEff will be 0.8 instead of 1.0.

--Bob Yantosca (talk) 19:06, 12 May 2020 (UTC)

Properties for gas-phase species

Quantity Units Description
WD_LiqAndGas 1 True/False flag indicating whether the ice-to-gas ratio needs to be computed for by co-condensation.

.

WD_ConvFacI2G 1 Specifies the conversion factor (i.e. the ratio of sticking coefficients on the ice surface) for computing the ice-to-gas-ratio by co-condensation (cf. Eq. 9 of Jacob et al, 2000).
  • WD_ConvFacI2G only needs to be specified for those species having WD_LiqAndGas = TRUE.
WD_RetFactor 1 Specifies the retention efficiency Ri of tracer in the liquid cloud condensate as it is converted to precipitation. (Ri < 1 accounts for volatization during riming.) The retention factor is defined in Eq. 1 of Jacob et al, 2000.

--Bob Yantosca (talk) 19:08, 12 May 2020 (UTC)

Table of co-condensation parameters

The quantities in each column are defined in our Overview section above.

For the species listed below, the ice-to-gas ratio is computed by co-condensation (see Eq. 9 of Jacob et al, 2000).

Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_LiqAndGas
[1]
WD_ConvFacI2G
[1]
References
H2O2 34.2 - - YES 4.36564e-1 Jacob et al 2000
NH3 17.04 - - YES 6.17395e-1 Jacob et al 2000

Table of all other wet-deposition parameters

The quantities in each column are defined in our [{#Overview|Overview]] section above.

A-B-C

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
ACTA 60.06 - - - - - - - - - - 0.02 -
AERI 126.9 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
ALD2 44.06 12.0 2.0 - - - - - - - - 0.02 -
ASOA1
ASOA2
ASOA3
ASOAN
150.0 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
ASOG1
ASOG2
ASOG3
150.0 - - - - - - - - - - 0.02 -
ATOOH 90.09 - - - - - - - - - - 0.02 -
BCPI 12.01 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
BCPO 12.01 - - - - 1.0 1.0 0.5 1.0 1.0 0.0 - -
Be7
Be7Strat
7.0 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
Be10
Be10Strat
10.0 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
Br2 159.8 - - - - - - - - - - 0.0 -
BrSALA 79.9 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
BrSALC 79.9 - - YES NO 1.0 0.5 1.0 1.0 0.0 1.0 - -
CH2O 30.03 - - - - - - - - - - 0.02 -

D-E-F-G

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
DST1
DSTAL1
29.0 - - - - 1.0 1.0 1.0 1.0 1.0 0.0 - -
DST2
DSTAL2
29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
DST3
DSTAL3
29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
DST4
DSTAL4
29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
DUST1-
DUST40
(TOMAS)
100 100 - - 1.0 1.0 0.5 1.0 1.0 0.0 1.0 - -
ECIL1-
ECIL40
(TOMAS)
96.0 96.0 - - 1.0 1.0 0.5 1.0 1.0 0.0 1.0 - -
EOH 46.08 12.0 2.0 - - - - - - - - 0.02 -
ETHLN 105.06 - - - - - - - - - - 0.02 -
ETP 62.08 - - - - - - - - - - 0.02 -
GLYC 60.06 - - - - - - - - - - 0.02 -
GLYX 58.04 - - - - - - - - - - 0.02 -

H

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
H2O2 34.02 - - - - - - - - - - 5e-2 -
HAC 74.08 - - - - - - - - - - 0.02 -
HBr 80.91 - - - - - - - - - - 1.0 -
HC5A 100.13 - - - - - - - - - - 0.02 -
HCl 36.45 - - - - - - - - - - 1.0 -
HCOOH 46.03 - - - - - - - - - - 0.02 -
Hg2 200.59 - - - - - - - - - - 1.0 -


HgP 200.59 - - - - 1.0 0.5 1.0 1.0 1.0 1.0 - -
HI 127.91 - - - - - - - - - - 1.0 -
HMHP 64.05 - - - - - - - - - - 0.02 -
HMML 102.1 - - - - - - - - - - 0.02 -
HNO3 63.01 - - - - 1.0 1.0 1.0 1.0 1.0 1.0 - -
HOI 143.89 - - - - - - - - - - 0.02 -
HONIT 215.0 - - - - - - - - - - 0.02 -

I

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
I2O2 285.8 - - - - - - - - - - 1.0 -
I2O3 301.8 - - - - - - - - - - 1.0 -
I2O4 317.8 - - - - - - - - - - 1.0 -
ICHE 116.13 - - - - - - - - - - 0.02 -
ICN 145.13 - - - - - - - - - - 0.02 -
ICPDH 150.15 - - - - - - - - - - 0.02 -
IDCHP 148.13 - - - - - - - - - - 0.02 -
IDHDP 168.17 - - - - - - - - - - 0.02 -
IDHPE 150.15 - - - - - - - - - - 0.02 -
IDN 192.15 - - - - - - - - - - 0.02 -
IEPOXA
IEPOXB
IEPOXD
106.14 - - - - - - - - - - 0.02 -
IHN1
IHN2
IHN3
147.15 - - - - - - - - - - 0.02 -
IHN4 147.15 - - - - - - - - - - 0.02 -
INDIOL 102.0 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
INPB
INPD
163.15 - - - - - - - - - - 0.02 -
IONITA 14.01 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
IONO 172.91 - - - - - - - - - - 0.02 -
IONO2 188.91 - - - - - - - - - - 1.0 -
ISALA 126.9 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
ISALC 126.9 - - YES - 1.0 0.5 1.0 1.0 0.0 1.0 - -
ITCN 195.15 - - - - - - - - - - 0.02 -
ITHN 197.17 - - - - - - - - - - 0.02 -

L-M

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
LIMO 136.26 - - - - - - - - - - 0.02 -
LVOC 154.19 - - - - - - - - - - 0.02 -
LVOCOA 154.19 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
MACR1OOH 102.1 - - - - - - - - - - 0.02 -
MAP 76.06 - - - - - - - - - - 0.02 -
MCRDH 104.12 - - - - - - - - - - 0.02 -
MCRENOL 86.1 - - - - - - - - - - 0.02 -
MCRHN
MCRHNB
149.11 - - - - - - - - - - 0.02 -


MCRHP 120.12 - - - - - - - - - - 0.02 -
MEK 72.11 12.0 4.0 - - - - - - - - 0.02 -
MGLY 72.07 - - - - - - - - - - 0.02 -
MOH 32.05 - - - - - - - - - - 0.02 -
MONITA 14.01 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
MONITS 215.28 - - - - - - - - - - 0.02 -
MONITU 215.28 - - - - - - - - - - 0.02 -
MOPI 12.01 - - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
MP 48.05 - - - - - - - - - - 0.02 -
MPAN 147.1 - - - - - - - - - - 0.02 -
MPN 93.05 - - - - - - - - - - 0.02 -
MSA 96.1 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
MTPA 136.26 - - - - - - - - - - 0.02 -
MTPO 136.26 136.23 - - - - - - - - - 0.02 -
MVK 70.09 - - - - - - - - -
0.02 -
MVKDH 105.13 - - - - - - - - - - 0.02 -
MVKHC 102.1 - - - - - - - - - - 0.02 -
MVKHCB 102.1 - - - - - - - - - - 0.02 -
MVKHP 120.12 - - - - - - - - - - 0.02 -
MVKN 149.12 - - - - - - - - - - 0.02 -
MVKPC 118.1 - - - - - - - - - - 0.02 -

N-O

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
NH3 17.04 - - - - - - - - - - 0.05 -
NH4 18.05 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
NIT 62.01 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
NITD1 29.0 - - - - 1.0 1.0 1.0 1.0 1.0 0.0 - -
NITD2 29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
NITD3 29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
NITD4 29.0 - - YES - 1.0 1.0 1.0 1.0 1.0 0.0 - -
NITs 31.4 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
NK1-NK40
(TOMAS)
1 1 - - 1.0 1.0 0.5 1.0 1.0 0.0 1.0 - -
OCPI 12.01 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
OCPO 12.01 12.0 - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
OPOA1
OPOA2
12.01 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
OPOG1
OPOG2
- - - - - - - - - - - 0.02 -

P-Q-R

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
PAN 121.06 - - - - - - - - - - 0.02 -
Pb210 210.0 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
Pb210Strat 210.0 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
pFe 55.85 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POA1
POA2
12.01 - - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
POG1
POG2
12.01 - - - - - - - - - - 0.02 -
POPG_BaP 252.32 - - - - - - - - - - 0.0 -
POPG_PHE 178.24 - - - - - - - - - - 0.0 -
POPG_PYR 202.26 - - - - - - - - - - 0.0 -
POPBCPI_BaP 252.32 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPBCPI_PHE 178.24 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPBCPI_PYR 202.26 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPBCPO_BaP 252.32 - - - - 1.0 1.0 0.5 1.0 1.0 0.0 - -
POPBCPO_PHE 178.24 - - - - 1.0 1.0 0.5 1.0 1.0 0.0 - -
POPBCPO_PYR 202.26 - - - - 1.0 1.0 0.5 1.0 1.0 0.0 - -
POPOCPI_BaP 252.32 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPOCPI_PHE 178.24 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPOCPI_PYR 202.26 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
POPOCPO_BaP 252.32 - - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
POPOCPO_PHE 178.24 - - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
POPOCPO_PYR 202.26 - - - - 0.5 0.5 0.5 0.0 0.0 0.0 - -
PP 92.11 - - - - - - - - - - 0.02 -
PPN 135.08 - - - - - - - - - - 0.02 -
PROPNN 119.08 - - - - - - - - - - 0.02 -
PRPE 42.09 12.0 3.0 - - - - - - - - 0.02 -
PRPN 137.11 - - - - - - - - - - 0.02 -
PYAC 88.07 - - - - - - - - - - 0.02 -
R4N2 119.1 - - - - - - - - - - 0.02 -
R4P 90.14 - - - - - - - - - - 0.02 -
RA3P 76.11 - - - - - - - - - - 0.02 -
RB3P 76.11 - - - - - - - - - - 0.02 -
RCHO 58.09 - - - - - - - - - - 0.02 -
RIPA
RIPB
RIPC
RIPD
118.15 - - - - - - - - - - 0.02 -
RP 90.09 - - - - - - - - - - 0.02 -

S through Z

Aerosol Species Parameters Gas-phase Species Parameters
Species MW_g
[g mol-1]
EmMW_g
[g mol-1]
Molec
Ratio

[1]
WD_Coarse
Aer

[?]
WD_Aer
ScavEff

[1]
WD_KcScaleFac
[1]
WD_RainoutEff
[1]
WD_Ret
Factor

[1]
References
T < 237 K 237 K <= T < 258 K T > 258 K T < 237 K 237 K <= T < 258 K T > 258 K
SALA 31.4 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
SALC 31.4 - - True - 1.0 0.5 1.0 1.0 0.0 1.0 - -
SF1-
SF40
(TOMAS)
96 96 - 1.0 1.0 0.5 1.0 1.0 0.0 1.0 - -
SO2 64.04 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
SO4 96.06 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
SO4D1 29.0 - - - - 1.0 1.0 1.0 1.0 1.0 0.0 - -
SO4D2 29.0 - - True - 1.0 1.0 1.0 1.0 1.0 0.0 - -
SO4D3 29.0 - - True - 1.0 1.0 1.0 1.0 1.0 0.0 - -
SO4D4 29.0 - - True - 1.0 1.0 1.0 1.0 1.0 0.0 - -
SO4s 31.4 - - - - 1.0 0.5 1.0 1.0 0.0 1.0 - -
SOAGX 58.04 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
SOAIE 118.15 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
SOAS 150.0 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -


SS1-
SS40
(TOMAS)
58.5 58.5 - - 1.0 1.0 0.5 1.0 1.0 0.0 1.0 - -
TSOA0
TSOA1
TSOA2
TSOA3
150.0 - - - - 1.0 0.5 1.0 0.8 0.0 0.8 - -
TSOG0
TSOG1
TSOG2
TSOG3
150.0 150.0 - - - - - - - - - 0.02 -

Notes

  1. We follow the algorithm of Qiaoqiao Wang et al (2014) for scavenging by snow and impaction scavenging for BC and IN, namely:
    • When 237 K <= T < 258 K:
      • Multiply Kc—the rate at which cloud condensate changes into precipitation— by 0.5, and
      • Allow black carbon, dust, HNO3, 210Pb, and 7Bethe following species, which are considered to be IN, to be rained out (aka "cold cloud scavenging").
      • Do not allow any other soluble aerosol species to rain out (i.e. set the rainout fraction to zero).

--Bob Y. (talk) 20:34, 23 October 2015 (UTC)

References

To be added

References

TBD


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