Emissions Scenarios - IPCC

190 An Overview of Scenarios
Al Scenario Family
Cumulative CO2 Emissions, Energy [QtC]
—•—
SRE S - raed ian
-SRES - max
Cumulative CO2
Emissions, Land-use
[GtC]
POP [billion
:02/PE [tC/TJ]
E/GDP [MJ/$]
-SRES - min
AlB-AIM
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.-О--Alvl-MiniCAM
• • -Л • - Alv2-MiniCAM
"> "AlB-MARIA
^^—AlB-ASF
AlB-IMAGE
AIG-MESSAGE
—^X—AlG-MiniCAM
—O—AIG-AIM
—«—AlC-MESSAGE
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- a- AIT-AIM
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GDP (тех) [T$]
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A2 Scenario Family
Cumulative CO2 Emissions, Energy [GtC]
- SRES - median
-SRES - max
Cumulative CO2
Emissions, Land-use
[GtC]
:02/PE [tC/TJ]
-SRES-min
•A2-ASF
•A2-MESSAGE
-••0--A2-MiniCAM
POP [billion]'
E/GDP [МГ/$]
-Д - - A2-AIM
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GDP (тех) [T$]
Figure 4-4: Global cumulative CO^ emissions in the scenarios and their main driving forces. The minimum, maximum, and
median (50* percentile) values shown on the six axes of each hexagon, for the cumulative energy and land-use CO2 emissions
from 1990 to 2100 and 2100 values for the four driving forces, are based on the distribution of scenarios in the literature (see
Chapter 2). The four hexagons show the ranges across the four scenario families (Al, A2, Bl, and B2), cumulative COj emissions
in GtC, population (POP) in billions, gross world product (GDP) in trilUon US dollars (T$) at 1990 prices, final energy intensity
of the gross world product (FE/GDP) in MJ per US dollar at 1990 prices (MJ/$), and COj emissions intensity of primary energy
(PE) (tC/TJ).