Tools for CMIP6 data processing and standardization

exemplified by EMAC and for AerChemMIP

DReq Web-GUI

cdo cmor

DReq Web-GUI

cdo cmor

climate model setup

Data Request

model

 

output

CMIP6 conform data

Postprocessing

  1. A simple tool to provide a list of a customized DReq?
  2. How much data will be produced by my set up?







     
  3. A simple tool to convert data to CMIP standard?
  4. Can I automize parts of the postprocessing?

run

Simplified data workflow in CMIP6

DReq Web-GUI

  1. A simple tool to provide a list of a customized DReq?

c6dreq.dkrz.de

uses DreqPy API by Martin Juckes, NCAS BADC.

DReq Web-GUI

2. How much data will be produced by my set up?

c6dreq.dkrz.de

uses DreqPy API by Martin Juckes, NCAS BADC.

DReq Web-GUI

cdo cmor

climate model setup

Data Request

model

 

output

CMIP6 conform data

Postprocessing

The DReq Web-GUI

  1. can create a customized DReq!
  2. estimates the volume of the custom DReq!







     
  3. A simple tool to convert data to CMIP standard?

run

Simplified data workflow in CMIP6

CMOR

CDO

CMIP standard

Convention (1 and 2) about climate data accepted in Coupled Model Inter-comparison Project

Collection of operators to process climate data

Climate Model Output Rewrite to ensure correct conversion

introduction

cdo cmor

3. A simple tool to convert data to CMIP standard?

Aside from the specific data structure, extensive and diverse meta data from coordinate information to global attributes must be integrated into the file

Many functions needs to be called with specific arguments, for each variable differently

Was not able to create and maintain the CMIP standard.

-> cdo cmor

?

  • CMOR ensures that ouput is CMIP compliant.
  • Different CMIP standards can be produced
  • Use synergies, avoid repeating work
  • Why using CMOR to create CMIP standard?
  • Why integrate CDO with CMOR?

No user side preparation of CMIP format description

cdo cmor

3. A simple tool to convert data to CMIP standard?

  • CDO is a well known tool with an active support
  • The CDO's interface allows
    • Different infile formats
    • enables access to all infile information no matter how structured

Use the power of CDOs...

?

  • Why using CMOR to create CMIP standard?
  • Why integrate CDO with CMOR?

cdo cmor

3. A simple tool to convert data to CMIP standard?

... to simplify CMOR usage:

?

  • Why using CMOR to create CMIP standard?
  • Why integrate CDO with CMOR?
cmor_setup();
cmor_dataset_json();
cmor_load_table();
cmor_set_table();
cmor_axis();
cmor_grid();
cmor_set_grid_mapping();
cmor_time_varying_grid_coordinate();
cmor_zfactor();
cmor_variable();
cmor_set_deflate();
cmor_set_variable_attribute();
cmor_create_output_path();
cmor_write();
cmor_close();

are included by one cdo cmor operator

3. A simple tool to convert data to CMIP standard?

cdo cmor

cdo cmor,Amon,\
         i=info_table.txt,\
        gi=grid_info.nc,\
        mt=mapping_table.txt\
                             infile
cdo cmor,Amon,\
         i=info_table.txt,\
        gi=grid_info.nc,\
        mt=mapping_table.txt\
                             infile
"variable_entry":{
  "ccb":  {
    "frequency": "mon",
    "modeling_realm":"atmos"
    }
  }

CMIP6_Amon.json

grid_
info.nc

mapping_
table.txt

ncdump -h mrsofc_fx_MPIESM-1-2-HR_historical_r1i1p1f1_gn.nc
#stdout:
netcdf test {
dimensions:
	lat = 192 ;
	lon = 384 ;
	bnds = 2 ;
variables:
        double lat(lat);
        double lat_bnds(lat,bnds);
        double lon(lon);
        double lon_bnds(lon,bnds);
&parameter cmor_name=tasmax      code=201 units="K"          cell_methods="m" project_mip_table=Amon /
&parameter cmor_name=tasmax      code=201 units="K"          cell_methods="m" project_mip_table=day /
&parameter cmor_name=tasmin      code=202 units="K"          cell_methods="m" project_mip_table=day  /
&parameter cmor_name=tasmin      code=202 units="K"          cell_methods="m" project_mip_table=Amon /
&parameter cmor_name=rsds        units="W m-2"      cell_methods="m" positive="d" /
&parameter cmor_name=rlds        units="W m-2"      cell_methods="m" positive="d" /

info_
table.txt

activity_id="CMIP"
experiment="AMIP"
experiment_id="amip"
forcing_index="1"
grid="All grid attributes are set for the native grid and based on information from attribute source."
grid_label="gn"
initialization_index="1"
institution="Max Planck Institute for Meteorology, Hamburg 20146, Germany"
institution_id="MPI-M"
license="CMIP6 model data produced by REQUIRED is licensed under a Creative Commons Attribution ShareAlike 4.0 International License (https://creativecommons.org/licenses). Consult https://pcmdi.llnl.gov/CMIP6/TermsOfUse for terms of use governing CMIP6 output, including citation requirements and proper acknowledgment. Further information about this data, including some limitations, can be found via the further_info_url (recorded as a global attribute in this file) and. The data producers and data providers make no warranty, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. All liabilities arising from the supply of the information (including any liability arising in negligence) are excluded to the fullest extent permitted by law."
mip_era="CMIP6"
nominal_resolution="100 km"
physics_index="1"
realization_index="1"
source="MPIESM1.2-HR (2017): \naerosol: none, prescribed MACv2-SP\natmos: ECHAM6.3 (spectral T127; 384 x 192 longitude/latitude; 95 levels; top level 0.01 hPa)\natmosChem: none\nland: JSBACH3.2\nlandIce: none/prescribed\nocean: MPIOM1.63 (tripolar TP04, approximately 0.4deg; 900 x 450 longitude/latitude; 40 levels; top grid cell 0-12 m)\nocnBgchem: HAMOCC\nseaIce: unnamed (thermodynamic (Semtner zero-layer) dynamic (Hibler 79) sea ice model)"
source_id="MPIESM-1-2-HR"
source_type="AGCM"
sub_experiment="none"
sub_experiment_id="none"
parent_activity_id="no parent"
parent_experiment_id="no parent"
calendar="proleptic_gregorian"
required_time_units="days since REQUIRED"

cdo cmor

4. Can I automize parts of the postprocessing?

cdo cmor

model

 

output

CMIP6 conform data

Postprocessing

1. Aggregation

2. Diagnostics

  • needs a recipe

3. standardization

  • requires attributes
  1. Provide recipes and attributes in a data base
  2. Based on 'cdo expr' and 'cdo cmor', script fragments can be created

cdo expr can evaluate expressions

cdo cmor can convert to CMIP6 standard

DReq Web-GUI

4. Can I automize parts of the postprocessing?

cdo cmor

Advantages of a webbased application:

  • One data base always available
  • Shared work
  • Logs of every change with account info

model

 

output

CMIP6 conform data

Postprocessing

2. Diagnostics

  • needs a recipe

3. standardization

  • requires attributes

DReq Web-GUI

4. Can I automize parts of the postprocessing?

cdo cmor

DReq Web-GUI

4. Can I automize parts of the postprocessing?

cdo cmor

DReq Web-GUI

4. Can I automize parts of the postprocessing?

cdo cmor

cat EMAC_CMIP6_mapping.txt

&parameter cmor_name="ch4"      name="CH4_ave"       project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="co"       name="CO_ave"        project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="co2"      name="CO2_ave"       project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="dms"      name="DMS_ave"       project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="emibc"    name="emibc"         project_mip_table="AERmon" units="kg m-2 s-1"   cell_methods="m"      /
&parameter cmor_name="emico"    name="emico"         project_mip_table="AERmon" units="kg m-2 s-1"   cell_methods="m"      /
&parameter cmor_name="eminox"   name="eminox"        project_mip_table="AERmon" units="kg m-2 s-1"   cell_methods="m"      /
&parameter cmor_name="emiso2"   name="emiso2"        project_mip_table="AERmon" units="kg m-2 s-1"   cell_methods="m"      /
&parameter cmor_name="hcho"     name="HCHO_ave"      project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="hcl"      name="HCl_ave"       project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="hno3"     name="HNO3_ave"      project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="isop"     name="C5H8_ave"      project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="jno2"     name="J_NO2_ave"     project_mip_table="AERmon" units="s-1"          cell_methods="m"      /
&parameter cmor_name="lwp"      name="xlvi_ave"      project_mip_table="AERmon" units="kg m-2"       cell_methods="m"      /
&parameter cmor_name="n2o"      name="N2O_ave"       project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"      /
&parameter cmor_name="no"       name="NO_ave"        project_mip_table="AERmon" units="mol mol-1"    cell_methods="m"

DReq Web-GUI

4. Can I automize parts of the postprocessing?

cdo cmor

model

 

output

CMIP6 conform data

Postprocessing

2. Diagnostics

  • needs a receipe

3. standardization

  • requires attributes
#-- Diagnostic for emac (ESM: EMAC-2-53-AerChem) variable pr / table 3hr
(if_requested $member $esmod 3hr pr $chunk  >$err.pr.3hr 2>&1 && {
  find_file -e -p $period "$sdir" "*3hr*" $err.find_file.3hr ifile
  $cdo -f nc \
    expr,"pr=aprl_ave+aprc_ave+aprs_ave" \
  $ifile in_cmor/3hr_pr_${period}.nc >>$err.pr.3hr 2>&1 || { echo ERROR >>$err.pr.3hr; }; }; )& 
  #-- CMOR-rewrite for emac (ESM: EMAC-2-53-AerChem) 3hr
  cn='clt pr rlds rsds rsdscs rsuscs tos'
  for var in $cn; do
    (if_requested $member $esmod 3hr $var $chunk 1>>$err.$var.3hr 2>&1 || continue
    ifile=in_cmor/3hr_${var}_${period}.nc
    $cdo cmor,3hr,mt=$mt,dr=$dr,cn=$var $ifile \
      1>>$err.$var.3hr 2>&1 || { echo ERROR >>$err.$var.3hr;};)&
  done

DReq Web-GUI

DReq Web-GUI

cdo cmor

climate model setup

Data Request

model

 

output

CMIP6 conform data

Postprocessing

The DReq Web-GUI

  1. can create a customized DReq!
  2. estimates the volume of the custom DReq!







    cdo
  3. cmor can convert data to CMIP standard
  4. expr can evaluate expressions

run

Simplified data workflow in CMIP6

CMIP6 post-processing workflow at DKRZ

By Fabian Wachsmann

Made with Slides.com

CMIP6 post-processing workflow at DKRZ

Introduction to the DReq Web-GUI and cdo cmor with the help of EMAC data workflow

  • 2,243

More from Fabian Wachsmann