The data files in this folder contain the data shown in Blanchard-Wrigglesworth, E., DeRepentigny, P., & Frierson, D. M. (2025). Increasing boreal fires reduce future global warming and sea ice loss. Proceedings of the National Academy of Sciences, 122(23), e2424614122.

figure1.mat contains the following arrays:

gfed4s_boreal : GFED4s boreal BC emissions, 1997-2023
cmip6_boreal : CMIP6 boreal BC emissions
cmip6_dates : Years for cmip6_boreal, 
borealfire_boreal : BorealFire BC emissions
gfed4s_global : GFED4s global BC emissions, 1997-2023
cmip6_global : CMIP6 global BC emissions
borealfire_global : BorealFire global BC emissions 
gfed4s_boreal_eurasia : GFED4s boreal Eurasia BC emissions, 1997-2023
gfed4s_boreal_northamerica : GFED4s boreal North America BC emissions, 1997-2023
gfed4s_zonal_trends : zonal trends in GFED4s emissions, 1997-2023

Figure2_data has:
latcam: latitude grid 
loncam: longitude grid

BURDENBCdn: black carbon column burden differences
BURDENPOMdn: primary organic matter column burden differences
BURDENSO4dn: sulfates column burden differences
*_sig : significance masks


Figure2_AODVIS has:
bor_mon : zonal monthly mean aerosol optical depth in borealfire 2015-2060
cesm2_mon: zonal monthly mean aerosol optical depth in cesm2-le 2015-2060
diff: difference
sigmask: significance 


Figure3_data has: 
ts_arctic_borealfire : mean arctic T2m in Boreal Fire
ts_glob_borealfire : “, for global
 ts_arctic_LE:” for the CESM2-LENS
 ts_glob_LE: ” for the CESM2-LENS global
 ts_trend_spatial_LE : CESM2-LENS annual temperature trends, 2015-2060
 ts_trend_spatial_borealfire : BorealFire annual temperature trends, 2015-2060

FIgure4_data has:

zonal_t_trend_LE : mean zonal temperature trend in CESM2-LENS
zonal_t_trend_borealfire: mean zonal temperature trend in BorealFire
diff_{season}: seasonal difference in temperature trends
sigmask_{season}: statistical significance mask for diff_{season}

Figure5_data has:
diff: mean annual precipitation difference between BorealFire and CESM2-LE
sigmask: significance mask 
diff_zon: zonal mean precipitation difference. 
sie_borealfire (ensemble, month, year) sea ice extent in borealfire
sie_le; sea ice extent in CESM2-LE (1850-2100)

Figure6_data has:
diff_acn: zonal-mean difference in aerosol concentration number
sigmask_acn: significance mask for diff_acn
diff_cod: zonal-mean difference in cloud optical depth
sigmask_cod: significance mask for cloud optical depth

diff_CDNUMC: annual-mean difference in cloud droplet number
diff_CLDLOW: annual-mean difference in low cloud fraction
diff_FSNS: annual-mean difference in downwelling shortwave at surface
sigmask_CDNUMC: significance mask for diff_CDNUMC
sigmask_CLDLOW: significance mask for diff_CLDLOW 
sigmask_FSNS: significance mask for diff_FSNS


Data from simulations is available from the NCAR glade