GEOS-5 Configuration for AR5: Difference between revisions

Line 34:

Van der Werf, G., J. T. Randerson, L. Giglio, G. J. Collatz, P. S. Kasibhatla, and A. F. Arellano Jr. (2006), Interannual variability in global biomass burning emissions from 1997 to 2004, Atmos. Chem. Phys., 6, 34233441.

== ~~PCHEM~~ Concentrations of ~~Greenhouse~~ Gases ==

== Prescribed CMIP5 Concentrations of Trace Gases Used in the Radiation Calculations ==

* N20, CH4, CFC-11, CFC-12, and HCFC-22

In all cases, the 3-dimensional distributions of mixing ratios are relaxed to the prescribed zonal-mean values described here, using a time scale of 3 days. In addition, the gas concentrations are subject to large-scale advection and to mixing by subgrid-scale convective and turbulent processes.

* '''N20, CH4, CFC-11, CFC-12, and HCFC-22'''

** Compute 5-year running averages of monthly zonal means from a 1950-2010 GEOS-5 CCM-V1 simulation.

** Calibrate to the tropospheric specification from CMIP5 historic mid-year concentrations.

** Calibrate to the tropospheric specification from CMIP5 historic mid-year concentrations downloaded from http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome.

** Project early 1950s concentrations back to 1870 based on the CMIP concentrations.

**References

*** M. Meinshausen, S. Smith, et al. "The RCP Greenhouse Gas Concentrations and their extension from 1765 to 2500" (in prep.), Climatic Change (Special Issue on RCPs)

*** http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome#descript

*** http://www.pik-potsdam.de/~mmalte/rcps/index.htm

** CMIP-recommended concentrations downloaded from http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome

** Project early 1950s concentrations back to 1870 based on the CMIP concentrations.

* '''Ozone'''

* Ozone

** AC&C/SPARC monthly averages 1870-2005 downloaded from ESG: ftp-esg.ucllnl.org.

** AC&C/SPARC monthly averages 1870-2005~~, converted to zonal means~~

** These were converted to zonal means,

** SPARC fields downloaded from ESG: ftp-esg.ucllnl.org

** undefined values near the surface were removed by filling, and

** zonal means were interpolated to GEOS-5 layers.

** References:

*** http://www.pa.op.dlr.de/CCMVal/AC&CSPARC_O3Database_CMIP5.html

*** Cionni, I., V. Eyring, J.-F. Lamarque, W. J. Randel, F. Wu et al., AC&C/SPARC ozone database in support of CMIP5 simulations, Atmos. Chem. Phys, in preparation, 2010.

** indefinites removed

** interpolated to GEOS-5 layers

* '''H2O above the tropopause'''

* H2O

** Compute 5-year running averages of monthly zonal means from a 1950-2010 GEOS-5 CCM-V1 simulation.

** Project early 1950s concentrations back to 1870 based on CH4 from ~~RCP~~ and assuming the stratospheric age-of-air is five years.

** Project early 1950s concentrations back to 1870 based on CH4 from RCPs and assuming the stratospheric age-of-air is five years.

@@ Line 34: / Line 34: @@
 Van der Werf, G., J. T. Randerson, L. Giglio, G. J. Collatz, P. S. Kasibhatla, and A. F. Arellano Jr. (2006), Interannual variability in global biomass burning emissions from 1997 to 2004, Atmos. Chem. Phys., 6, 34233441.
-== PCHEM Concentrations of Greenhouse Gases ==
+== Prescribed CMIP5 Concentrations of Trace Gases Used in the Radiation Calculations ==
-* N<sub>2</sub>0, CH4, CFC-11, CFC-12, and HCFC-22
+In all cases, the 3-dimensional distributions of mixing ratios are relaxed to the prescribed zonal-mean values described here, using a time scale of 3 days. In addition, the gas concentrations are subject to large-scale advection and to mixing by subgrid-scale convective and turbulent processes.
+* '''N<sub>2</sub>0, CH4, CFC-11, CFC-12, and HCFC-22'''
 ** Compute 5-year running averages of monthly zonal means from a 1950-2010 GEOS-5 CCM-V1 simulation.
-** Calibrate to the tropospheric specification from CMIP5 historic mid-year concentrations.
+** Calibrate to the tropospheric specification from CMIP5 historic mid-year concentrations downloaded from http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome.
+** Project early 1950s concentrations back to 1870 based on the CMIP concentrations.
 **References
 *** M. Meinshausen, S. Smith, et al. "The RCP Greenhouse Gas Concentrations and their extension from 1765 to 2500" (in prep.), Climatic Change (Special Issue on RCPs)
 *** http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome#descript
 *** http://www.pik-potsdam.de/~mmalte/rcps/index.htm
-** CMIP-recommended concentrations downloaded from http://www.iiasa.ac.at/web-apps/tnt/RcpDb/dsd?Action=htmlpage&page=welcome
-** Project early 1950s concentrations back to 1870 based on the CMIP concentrations.
+* '''Ozone'''
-* Ozone
+** AC&C/SPARC monthly averages 1870-2005 downloaded from ESG: ftp-esg.ucllnl.org.
-** AC&C/SPARC monthly averages 1870-2005, converted to zonal means
+** These were converted to zonal means,
-** SPARC fields downloaded from ESG: ftp-esg.ucllnl.org
+** undefined values near the surface were removed by filling, and
+** zonal means were interpolated to GEOS-5 layers.
 ** References:
 *** http://www.pa.op.dlr.de/CCMVal/AC&CSPARC_O3Database_CMIP5.html
 *** Cionni, I., V. Eyring, J.-F. Lamarque, W. J. Randel, F. Wu et al., AC&C/SPARC ozone database in support of CMIP5 simulations, Atmos. Chem. Phys, in preparation, 2010.
-** indefinites removed
-** interpolated to GEOS-5 layers
+* '''H<sub>2</sub>O above the tropopause'''
-* H<sub>2</sub>O
 ** Compute 5-year running averages of monthly zonal means from a 1950-2010 GEOS-5 CCM-V1 simulation.
-** Project early 1950s concentrations back to 1870 based on CH4 from RCP and assuming the stratospheric age-of-air is five years.
+** Project early 1950s concentrations back to 1870 based on CH4 from RCPs and assuming the stratospheric age-of-air is five years.