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aerocom:indirect [2013-10-02 23:07:53] steve.ghan@pnnl.gov |
aerocom:indirect [2022-05-31 09:29:31] (current) |
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+ | ATTENTION - THIS WIKI PAGE IS NO LONGER UPDATED - PLEASE GO TO [[http:// | ||
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===== Indirect Effect Experiment Remarks ===== | ===== Indirect Effect Experiment Remarks ===== | ||
==== Indirect forcing experiment ===== | ==== Indirect forcing experiment ===== | ||
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+ | Repository: aerocom-users:/ | ||
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+ | == Motivation == | ||
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+ | The proposed study is designed to address two key areas of uncertainty: | ||
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+ | To address issue 1), we’ve added daily and monthly diagnostics that can be compared with CloudSat and MODIS retrievals of the relationship between the aerosol optical depth and the probability of precipitation (Wang et al., 2012). | ||
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+ | To address issue 2), we’ve added experiments in which heterogeneous nucleation is neglected for T%%< | ||
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+ | We also have added a requirement to nudge toward analyzed winds, which we’ve found greatly reduces the noise due to natural variability without significantly inhibiting the cloud response to the aerosol. (Kooperman et al., 2012). Simulations of six years duration each should be sufficient for all experiments. | ||
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+ | To facilitate analysis and comparison before the 2013 AeroCom meeting, the results should be submitted to the AeroCom repository by December 1, 2013. Please contact steve.ghan@pnnl.gov and xiaohong.liu@pnnl.gov when your results have been submitted. | ||
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+ | Cooper, W. A.: Ice initiation in natural clouds. precipitation enhancement – a scientific challenge, Meteor. Mon., 43, 29–32, 1986. | ||
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+ | Kooperman, G. J., M. S. Pritchard, S. J. Ghan, R. C. J. Sommerville, | ||
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+ | Wang, M., S. Ghan, X. Liu, T. L’Ecuyer, K. Zhang, H. Morrison, M. Ovchinnikov, | ||
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< | < | ||
< | < | ||
- | < | + | < |
< | < | ||
< | < | ||
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(1) 2D diagnostics for evaluation with satellite data | (1) 2D diagnostics for evaluation with satellite data | ||
- | 5 years (years 2006-2010) of 3-hourly data from the PD run | + | 5 years (years 2006-2010) of 3-hourly |
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^ name ^ long_name (CF if possible) ^ units ^ description ^ | ^ name ^ long_name (CF if possible) ^ units ^ description ^ | ||
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| clt | cloud_area_fraction | 1 | Fractional cover by all clouds | | | clt | cloud_area_fraction | 1 | Fractional cover by all clouds | | ||
| lcc | liquid_cloud_area_fraction | | lcc | liquid_cloud_area_fraction | ||
- | | lwp | atmosphere_cloud_ice_content | + | | lwp | atmosphere_cloud_liquid_path |
- | | iwp | atmosphere_cloud_ice_content | + | | iwp | atmosphere_cloud_ice_path |
| icr | cloud-top_ice_crystal_effective_radius | m | grid cell mean effective radius of crystals at top of ice clouds | | | icr | cloud-top_ice_crystal_effective_radius | m | grid cell mean effective radius of crystals at top of ice clouds | | ||
| icc | ice_cloud_area_fraction | 1 | Fractional cover by ice clouds | | | icc | ice_cloud_area_fraction | 1 | Fractional cover by ice clouds | | ||
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| z | altitude | | z | altitude | ||
| airmass | atmosphere_mass_content_of_air | | airmass | atmosphere_mass_content_of_air | ||
- | | mmrdu | mass_fraction_ of_dust_dry_aerosol_in_air | kg/kg | | ||
- | | mmrbc | mass_fraction_ of_black_carbon_dry_aerosol_in_air | kg/kg | | ||
- | | mmrso4 | mass_fraction_ of_sulfate_dry_aerosol_in_air | kg/kg | | ||
- | | cirrus_nso4 | sulfate_aerosol_number_for_homogeneous | m-3 | | ||
- | | cirrus_ndust | dust_aerosol_number_for_homogeneous | m-3 | | ||
- | | cirrus_bc | bc_aerosol_number_for_homogeneous | m-3 | | ||
| ccn0.1 | cloud_condensation_nuclei_0.1 | m-3 | each layer (S=0.1%) | | | ccn0.1 | cloud_condensation_nuclei_0.1 | m-3 | each layer (S=0.1%) | | ||
| ccn0.3 | cloud_condensation_nuclei_0.3 | m-3 | each layer (S=0.3%) | | | ccn0.3 | cloud_condensation_nuclei_0.3 | m-3 | each layer (S=0.3%) | | ||
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| sati | ice_supersaturation | 1 | Supersaturation with respect to ice | | | sati | ice_supersaturation | 1 | Supersaturation with respect to ice | | ||
| wsubi | subgrid_vertical_velocity_for_cirrus | m s-1 | | | wsubi | subgrid_vertical_velocity_for_cirrus | m s-1 | | ||
- | | cirrus_nso4 | + | | mmrdu | mass_fraction_of_dust_dry_aerosol_in_air | kg/kg | each layer | |
- | | cirrus_ndust | + | | mmrbc | mass_fraction_of_black_carbon_dry_aerosol_in_air | kg/kg |each layer | |
- | | cirrus_nbc | + | | mmrso4 | mass_fraction_of_sulfate_dry_aerosol_in_air | kg/kg | each layer | |
- | | cirrus_nihom | + | | cirrus_nso4 |
- | | cirrus_nihet | + | | cirrus_ndust |
- | | cirrus_freqhom | homogeneous_nucleation_frequency | 1 | frequency counter of homogeneous aerosol freezing for T<-37C. For each time step, freqhom = 1 if homogeneous ice nucleation happens; otherwise freqhom = 0. Monthly average of this value indicates the homogeneous nucleation frequency. | | + | | cirrus_nbc |
- | | cirrus_freqhet | + | | cirrus_nihom |
+ | | cirrus_nihet | ||
+ | | cirrus_freqhom | homogeneous_nucleation_frequency | 1 | frequency counter of homogeneous aerosol freezing for T%%<%%-37C. For each time step, freqhom = 1 if homogeneous ice nucleation happens; otherwise freqhom = 0. Monthly average of this value indicates the homogeneous nucleation frequency. | | ||
+ | | cirrus_freqhet | ||
| mp_hetnuc | | mp_hetnuc | ||
| mp_homnuc | | mp_homnuc | ||
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f3d(nx,nz) cloud fraction | f3d(nx,nz) cloud fraction | ||
t3d(nx,nz) temperature | t3d(nx,nz) temperature | ||
- | phase3d(nx, | + | phase3d(nx, |
- | cdr3d(nx, | + | |
- | icr3d(nx, | + | phase3d could be from fice3d/f3d where fice3d=ice+mixed phase cloud fraction |
- | cdnc3d(nx, | + | cdr3d(nx, |
+ | icr3d(nx, | ||
+ | cdnc3d(nx, | ||
thres_cld = 0.001 \\ | thres_cld = 0.001 \\ | ||
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==== Q/A ==== | ==== Q/A ==== | ||
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