Difference between revisions of "GEOS-Chem v9-01-03"

Revision as of 19:36, 8 March 2012

Overview

BETA RELEASE -- TBD

• Previous version: GEOS-Chem v9-01-02
• Next version: ???

What's new in this version

GEOS-Chem v9-01-03 shall contain the following major updates and improvements. (NOTE: The order of inclusion is subject to change):

--Bob Y. 10:46, 25 January 2012 (EST)
--Melissa Payer 14:36, 8 March 2012 (EST)

New data directories

The following new data directories have been added for GEOS-Chem v9-01-03. You will have to download the directories relevant to your simulation.

You can download these directories with anonymous FTP or the Wget utility. For instructions, please see Chapter 2.4, Downloading the GEOS-Chem shared data directories in the GEOS-Chem Online User's Guide.

GEOS_1x1/PARANOX_201202                                         # For PARANOX ship plume model

--Melissa Payer 16:53, 22 February 2012 (EST)

Previous issues now resolved in v9-01-03

Bug fix for GLCO3 and GLPAN in standard mechanism

This update was tested in the 1-month benchmark simulation v9-01-03a and approved on 08 Dec 2011.

Prior to v9-01-02, some species in the globchem.dat and ratj.d files were left as inactive, but should have been declared as dead. For a full description of this issue, please see this wiki post on the Chemistry Issues page.

--Bob Y. 17:07, 14 December 2011 (EST)

Structural changes to clarify science behind washout

This update was tested in the 1-month benchmark simulation v9-01-03e and approved on 02 Feb 2012.

Helen Amos wrote:

Qiaoqiao's aerosol scavenging updates should *not* be applied to HNO3. HNO3 should still be scavenged according to Eq (14) from Jacob (2000). This issue came up a while back and as a result I wrote code to split washout into three cases: aerosols, HNO3, and soluble gases. I restructured the washout code specifically to handle Qiaoqiao's updates and make sure HNO3 didn't change, so if no one objects I suggest these structure changes go into the std code with Qiaoqiao's updates.

--Melissa Payer 16:01, 23 January 2012 (EST)

Correct out-of-bounds error in offline aerosol simulation

This update was tested in the 1-month benchmark simulation v9-01-03g and approved on 27 Feb 2012.

When using the offline aerosol simulation, an out-of-bounds error was found to occur in array WTAERA within subroutine RDAER (aerosol_mod.F). To fix the error, add the following lines to INIT_COMODE (comode_mod.F) below the offline aerosol simulation IF statement:

        ALLOCATE( WTAREA( ITLOOP, NDUST+NAER ), STAT=AS )
        IF ( AS /= 0 ) CALL ALLOC_ERR( 'WTAREA' )
        WTAREA = 0d0

        ALLOCATE( WERADIUS( ITLOOP, NDUST+NAER ), STAT=AS )
        IF ( AS /= 0 ) CALL ALLOC_ERR( 'WERADIUS' )
        WERADIUS = 0d0

--Melissa Payer 17:47, 11 January 2012 (EST)

Bug fixes in diag3.F

Bug fix for mass transport flux diagnostics

This update was tested in the 1-month benchmark simulation v9-01-03g and approved on 27 Feb 2012.

Mat Evans wrote:

In diag3.f line 1740

  ARRAY(:,:,1:LD24) = MASSFLEW(:,:,LD24:1:-1,N) / SCALEDYN

Should be

  ARRAY(:,:,1:LD24) = MASSFLEW(:,:,LLPAR:LLPAR-LD24+1:-1,N) / SCALEDYN

And the same for LD25 Line 1773

And for same for LD26 line 1806

Everything is fine if LD24 = LLPAR but it seems to go wrong if you try to output a subset of the model levels..

--Melissa Payer 17:28, 12 January 2012 (EST)

Bug fix in ND67 sea level pressure diagnostic

This update was tested in the 1-month benchmark simulation v9-01-03g and approved on 27 Feb 2012.

When plotting SLP in GAMAP for GEOS-5 at both 4°x5° and 2°x2.5° resolutions, the values appeared to be half of what they should be (SLP ~500 hPa globally).

In diag3.F, the lines:

              CASE ( 18 ) 
                 SCALEX = SCALE_ND67
                 UNIT   = 'hPa'

should be changed to:

              CASE ( 18 ) 
#if   defined( MERRA )
                 SCALEX = SCALE_A1     ! MERRA SLP is hourly
#else
                 SCALEX = SCALE_I6     ! Otherwise SLP is 6-h inst.
#endif
                 UNIT   = 'hPa'

As it is now, SCALE_ND67 = SCALE_A3 but SLP is an I6 field for GCAP, GEOS-3, GEOS-4, and GEOS-5.

--Melissa Payer 17:42, 12 January 2012 (EST)

Bug fixes for nested-grid simulation

This update was tested in the 1-month benchmark simulation v9-01-03g and approved on 27 Feb 2012.

Dylan Millet wrote:

My student Lu is running N. American nested grid with the v9-3-1b that Bob provided. We found a few minor glitches, mostly specific to the nested grid, that we thought we'd pass along. Perhaps they've already been fixed on your end.

1. in land_mercury_mod.f, the variable "SOIL_EMS_FAC" is undefined for the 05x0666 case.
2. the Makefiles in the GeosApm and GeosTomas directories each have an intermediate "else" that needs to be changed to an "elif"
3. in tpcore_bc_mod.F, when reading in the boundary conditions if ITS_A_NEW_DAY, the call to ITS_A_NEW_DAY() needs to be ITS_A_NEW_DAY(.TRUE.) so that it will read in the boundary conditions actually at midnight. Otherwise it won't read them in at the start of the run.

--Melissa Payer 11:11, 18 January 2012 (EST)

Bug fix in streets_anthro_mod.F for offline simulations

Fabien Paulot wrote:

I just found a little bug in the streets emission routine

     !=================================================================
     ! Apply seasonal variation to NH3 based on seasonality from 
     ! Lex Bouwman.  Follow methodology in emep_mod.f (jaf, 3/2/11)
     !=================================================================

     ! Get TAU value for 1995, since the data is timestamped w/ this
     TAU1995 = GET_TAU0( GET_MONTH(), 1, 1995 )

     ! For NH3 only ...
     IF ( TRACERN == IDTNH3 ) THEN

        ! File name containing scaling factors
        FILENAME_S = TRIM( DATA_DIR_1x1 ) // 
    &        'Streets_200607/NH3-Streets-SeasonalScalar.generic.1x1'

        ! Tracer number for scale factor data
        RATIOID = 74

        ! Echo info
        WRITE( 6, 101 ) TRIM( FILENAME_S )
101      FORMAT( '     - READ_STREETS: Reading ', a )

        ! Read scaling factors
        CALL READ_BPCH2( FILENAME_S, 'RATIO-2D',  RATIOID,
    &                    TAU1995,     I1x1,       J1x1-1,
    &                    1,           SCALAR_1x1, QUIET=.TRUE. )

        ! Apply seasonal scalar to NH3 emissions
        ARRAY(:,:,1) = ARRAY(:,:,1) * SCALAR_1x1(:,:,1)

     ENDIF

The instruction TRACERN == IDTNH3 should be replaced by TRACER == 30 to avoid issues with the offline chemistry where idtnh3 is not equal to 30.

This routine is being called by

           CALL READ_STREETS( FILENAME, 'ANTHSRCE', 30, TAU2000, NH3 )

for NH3

So it seems to me, you are not going to scale NH3 if IDTNH3 is not equal to 30.

--Melissa Payer 11:51, 2 March 2012 (EST)

Outstanding issues not yet resolved in v9-01-03

TBD