PMIP4 SATIRE-M solar forcing data

The files contain Solar Spectral Irradiance (SSI) reconstruction based on 14C or 10Be and the SATIRE-M model, with and without an adaptation of the spectral irradiance to the CMIP6 historical forcing.

• 14C data for the last 9000 years (6754.5 BC to December 2015)
• 10Be data for the years 885 CE to December 2015

The 14C-based data set scaled to the CMIP6 historical forcing is the recommended forcing for the PMIP4-CMIP6 tier-1 past1000 experiment.

• file names = SSI_<type>_cycle_yearly_cmip_v20160613_<scaling>.txt
  • type = 14C or 10Be
  • scaling =
    • fc: adaptation of the spectral irradiance to the CMIP6 historical forcing
    • nfc: no re-scaling

The data are provided in simple text format. The file structure is as follows:

• 1st array: wavelength array in [nm], listing the center of each wavelength bin.
• 2nd array: wavelength bin in [nm], listing the bin width of each wavelength bin.
• 3rd array: time in [year] (floating numbers).
• 4th array: SSI reconstruction in [W m-2 nm-1]. SSI is average SSI in corresponding bin.

We provide the following IDL code to read the .txt file and calculate TSI:

;====================================================
;N=69235 for 14C reconstruction
;N=61595 for 10Be reconstruction
header=strarr(12)
satire_wl=dblarr(1070)
satire_dwl=dblarr(1070)
time=dblarr(N)
SSI=dblarr(1070,N)
 
openr,1,filename
 readf,1,header
 readf,1,satire_wl
 readf,1,satire_dwl
 readf,1,time
 readf,1,SSI
close,1
 
TSI=dblarr(N)
FOR i=0L,N-1 DO TSI[i]=TOTAL(satire_dwl*SSI[*,i])
;=====================================================

• Baroni, M., and ASTER Team (2015), A new 10Be record recovered from an Antarctic ice core: validity and limitations to record the solar activity, Geophysical Research Abstracts 17, EGU2015-6357
• Vieira, L.E.A. et al. (2011), Evolution of the solar irradiance during the Holocene, Astron. Astroph., 531, A6, doi:10.1051/0004-6361/201015843
• Usoskin, I.G. et al. (2014), Evidence for distinct modes of solar activity, Astron. Astrophys., 562, L10, doi:10.1051/004-6361/201423391
• Usoskin, I.G. et al. (2016), Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima, Astron. Astroph., 587, A150, doi:10.1051/0004-6361/201527295

You will find below a table with all the available data files, and their md5sum checksum (if you want to check that you download was OK, you can just type md5sum file.nc and compare the result to what is displayed in the table).

If you want to download a file, click on the PMIP4 SATIRE-M solar forcing data download link and then on the file you need. The files are currently protected by a password. Get in touch with Jean-Yves Peterschmitt if you need to access them.