source:
base data http://www.ipcc.ch/report/sr15/
> Chapter 2
input fields values can be overwritten values from the sheet „EDGAR“  SPM >
I. Input of base data for the determination of global emission pathways 2020 - 2100 which are compatible with a given budget  
I. a) Global budget from 2018 to 2100                      
CO2 budget from 2018 to 2100
in Gt
420 see Table 2.2
I. b) Global emissions 2018 - 2019                      
  annual rate of change:   1,7% 0,9% -0,2% 1,1% 1,2% 1,9% 1,2%
      year: 2012 2013 2014 2015 2016 2017 2018 2019 sum
2018 - 2019
CO2 emissions without: FOLU and int. shipping/aviation (ISA) Gt 34,3 34,9 35,2 35,1 35,5 35,9 36,6 37,1 74
CO2 emissions inclusive FOLU and ISA                   43,8 info
I. c) Global CO2 budget 2020 - 2100 without: FOLU and ISA (deduction due to poor data, especially at country level)      
global CO2 budget 2018 - 2100 420 Gt actual share
net positive FOLU CO2 (resp. LUC) from 2018 on actual about in Gt 5,5[1] how much should be reserved? 13,0% -55 Gt 12,7%
international shipping and aviation (ISA) from 2018 on       how much should be reserved? 3,0% -13 Gt 2,9%
global CO2 budget 2018 - 2100 353 Gt
(projected) global CO2 emissions 2018 - 2019               -74 Gt
global CO2 budget 2020 - 2100 (without FOLU and ISA)           279 Gt  
I. d) Global budget 2020 - 2100                      
CO2 budget 2020 - 2100 in Gt (here calculated value) 279  
CO2 budget 2020 - 2100 in Gt; free input  
CO2 budget 2020 - 2100 in Gt (basis for this tool)     here calculated value   279  
I. e) Emissions in the base year 2019 and minimum emissions                
CO2 emissions in the base year 2019 in Gt (see I. b) 37,1
Minimum annual CO2 emissions in Gt (a negative value stands for global net negative emissions, see notes below); Emin: -4,35 -11,7%[2]
Share of total global emissions -9,9%
II. Base date of the national emission pathways calculated with the Regensburg Formula
At what level of per capita emissions all countries should converge; convergence level (t / capita)? 0,25 5%[3]
For your information: global per capita emissions today (without FOLU and ISA) approx. (t / capita): 4,8
Which population size is to be used in the tool for the convergence year? frozen population size 2019
III. Input values when global emissions are increasing informations for E_min:
The Regensburg Formula does not yield reasonable results if global emissions are increasing, because developing countries would need to lower their emissions.
We do however also offer some scenarios where global emissions can increase temporarily after 2019. For those years with increasing emissions, the Regensburg Formula was not applied. Instead, global increase was distributed according to the following rule: the proportion PC_t of this increase is distributed according to population in relation to global population, and the proportion (1-PC_t) of this increase is distributed according to the proportion of emissions in relation to global emissions in year t-1.

PC_t can be escalated with an escalation rate. Here you can set the start value PC_20 for the year 2020 and the escalation rate ER_PC.
CO2 excl. FOLU and ISA 2019 in Gt 37,06   illustrative model paths IPCC SR15
E_min actual in Gt -4,35   in Gt P1 P2 average
share E_min   -11,7% current value 2100 -3,52 -4,47 -4,00
proposals for E_min:
CO2 excl. FOLU and ISA 2019 in Gt 37,06
PC20 10% E_min IPCC illistrative model paths in Gt P1 P2 average
ERPC 10% -3,52 -4,47 -4,00
share E_min IPCC   -9,51% -12,07% -10,79%
IV. Further input values (for information purposes) total CO2 2019   43,84
share E_min IPCC   -8,0% -10,2% -9,1%
global CO2 emissions by the end of 2010 in Gt 1.930[4]
actual FOLU CO2 emissions about in Gt 5,5[5] 2011 - 2017: 39[6]
Lists for the drop-down menus:
   
here calculated value
value of free input
   
frozen population size 2019
forecast values  

[1]
RM:
source: Global Carbon Project
[2]
RM:
applied to the global emissions without FOLU and ISA; see proposals right down
[3]
RM:
share on global per capita emissions 2019
[4]
RM:
cf. IPCC SR15
[5]
RM:
p.a.

Source: Global Carbon Project
[6]
RM:
source: Global Carbon Project