base data
input fields   values from the sheet „EDGAR“ 
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 2020 to 2100                      
CO2 budget from 2020 to 2100
in Gt
Key findings on remaining CO2 budgets of the IPCC Sixth Assessment Report Working Group 1:
500 see separate paper  
I. b) Global emissions 2012 - 2019 (info)                       global emissions 2019
EDGAR GCP
  annual rate of change:            2.3% 0.3% -4.7% 5.2% fossile use excl. ISA 36.7 fossile use 37.0
      year:          2017 2018 2019 2020 2021 ISA 1.3
CO2 emissions without LUC and int. shipping/aviation (ISA)[1] Gt          35.7 36.6 36.7 35.0 36.8 LULUCF 3.5 LUC 4.6[2]
Totoal 41.5   41.6
I. c) Global CO2 budget 2020 - 2100 without LUC and ISA                    
global CO2 budget 2020 - 2100 actual 2019 share[3] 500  Gt
* LUC budget 2020 - 2100 4.6 Enter the LUC budget 2020 - 2100 in Gt:  0 0% 0  Gt *
ISA budget 2020 - 2100 1.3   How much of the global budget should be reserved? 3.0%   -15  Gt
global CO2 budget 2020 - 2100 (without LUC and ISA)               485  Gt * For the determination of the LUC budget and the potential for net negative emissions, see our separate paper: Pdf file download icon Stock-Vektorgrafik | Adobe Stock
I. d) Global budget 2020 - 2100 to distribute here                      
CO2 budget 2020 - 2100 in Gt (here calculated value) 485  
CO2 budget 2020 - 2100 in Gt; free input  
CO2 budget 2020 - 2100 in Gt (basis for this tool)     here calculated value   485  
I. e) Emissions in the base year 2019 and minimum emissions                
CO2 emissions in the base year 2019 in Gt (see I. b) 36.7
* Minimum annual CO2 emissions in Gt (a negative value stands for global net negative emissions, see notes right); Emin: -0.73 -2.0%[4] *
Share of total global emissions in 2019 -1.8%
II. Base date of the national emission paths calculated with the Regensburg Formula
At what level of per capita emissions all countries should converge; convergence level (t / capita)? 0.50 11%[5]
For your information: global per capita emissions 2019 (without LUC and ISA) approx.: 4.76  t
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 in refer to the base year
The Regensburg Formula does not yield reasonable results if global emissions are increasing.

For years with increasing emissions with regard to the base year, the Regensburg Formula is not applied. Instead, the global increase is distributed according to the following rule: The share PC_t of this increase is distributed according to the country's population relative to the global population and the share (1-PC_t) of this increase is distributed according to the share of the country's emissions relative 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.
PC20 50%
ERPC 10%
Lists for the drop-down menus:
   
here calculated value
value of free input
   
frozen population size 2019
forecast values  

[1]
RM:
CO2 emissions from the use of fossil fuels (except ISA) and from cement production.
[2]
RM:
Source: Global Carbon Project 2022
[3]
RM:
Percentage share of the LUC budget in the global CO2 budget.
[4]
RM:
Applied to the global emissions 2019 without LUC  and ISA.
[5]
RM:
share on global per capita emissions 2019