Figure SPM-3 - Projected Changes in Annual Runoff
Figure SPM-3: Projected changes in average annual water runoff by
2050, relative to average runoff for 1961-1990, largely follow projected changes in
precipitation. Changes in runoff are calculated with a hydrologic model using as inputs
climate projections from two versions of the Hadley Centre atmosphere-ocean general
circulation model (AOGCM) for a scenario of 1% per annum increase in effective carbon
dioxide concentration in the atmosphere: (a) HadCM2 ensemble mean and (b) HadCM3.
Projected increases in runoff in high latitudes and southeast Asia, and decreases in
central Asia, the area around the Mediterranean, southern Africa, and Australia are
broadly consistent across the Hadley Centre experiments, and with the precipitation
projections of other AOGCM experiments. For other areas of the world, changes in
precipitation and runoff are scenario- and model-dependent."
Source & ©
IPCC TAR SPM of WG II 
Related publication:
Other Figures & Tables on this publication:
Adaptive Capacity, Vulnerability, and Key Concerns by Region
Facts on environmental matters
Table SPM.1 Estimates of potential global greenhouse gas emission reductions in 2010 and in 2020
The Emissions Scenarios from the Special Report on Emissions Scenarios (SRES)
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Footnotes for the Summary for Policymakers of IPCC Working Group III
Footnotes for Table 1 of IPCC SPM WG II
Footnotes for the Summary for Policymakers of IPCC Working Group 1
Footnotes for the Summary for Policymakers of IPCC Working Group II
Variations of the Earth's surface temperature for :
Indicators of the human influence on the atmosphere during the Industrial Era
The global mean radiative forcing of the climate system for the year 2000,
relative to 1750
Simulated annual global mean surface temperatures
The global climate of the 21st Century
Documented Climate Change Impacts
Figure SPM-2 - Reasons for Concern
Figure SPM-3 - Projected Changes in Annual Runoff
Carbon in Oil, Gas and Coal Reserves Compared with Historic Fossil Fuel Carbon
Emissions (in gigatonnes)
Footnotes to Table SPM-1 (Question 6.2.2)
Figure 8.1 Precipitation
Figure 8.2 Hurricanes
Schematic of observed variations of the temperature
indicators / the hydrological and
storm-related indicators
Many external factors force climate change
The annual mean change of the temperature (colour shading) and its range (isolines)
Analysis of inter-model consistency in regional relative warming
GCRIO
UNFCCC
Pew Climate
NCDC
Climate Ark
Climatic Research Unit
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World Business Council for Sustainable Development
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