twentieth century & future trends
Post on 18-Jan-2016
42 Views
Preview:
DESCRIPTION
TRANSCRIPT
Twentieth Century Twentieth Century & &
Future TrendsFuture Trends
(IPCC TAR)(IPCC TAR)
N.H. Surface Air TemperatureN.H. Surface Air Temperature
(IPCC TAR)(IPCC TAR)
Surface Air TemperatureSurface Air Temperature
(IPCC TAR)(IPCC TAR)
Surface Air Surface Air TemperatureTemperature
Trends in TemperatureTrends in Temperature
(IPCC TAR)(IPCC TAR)
Trends in TemperatureTrends in Temperature
(IPCC TAR)(IPCC TAR)
Trends in TemperatureTrends in Temperature
(IPCC TAR)(IPCC TAR)
(IPCC TAR)(IPCC TAR)
Seasonal Temperature TrendsSeasonal Temperature Trends
Trends in Diurnal Temperature RangeTrends in Diurnal Temperature Range
• 1950-19931950-1993
• Non-urban stations onlyNon-urban stations only(IPCC TAR)(IPCC TAR)
Diurnal Diurnal Temperature Temperature
Range Range
vs.vs.
Cloud CoverCloud Cover
• cloud cover - solidcloud cover - solid
• DTR (˚C) - dashedDTR (˚C) - dashed
(IPCC TAR)(IPCC TAR)
(IPCC TAR)(IPCC TAR)
Lower Troposphere TrendsLower Troposphere Trends
(IPCC TAR)(IPCC TAR)
Lower Stratosphere TrendsLower Stratosphere Trends
Glacier Glacier RetreatRetreat
(IPCC TAR)(IPCC TAR)
N.H. Snow Cover ExtentN.H. Snow Cover Extent
(IPCC TAR)(IPCC TAR)
N.H. Sea Ice ExtentN.H. Sea Ice Extent
(IPCC TAR)(IPCC TAR)
S.H. Sea Ice ExtentS.H. Sea Ice Extent
(IPCC TAR)(IPCC TAR)
Arctic Sea Ice ThicknessArctic Sea Ice Thickness
(IPCC TAR)(IPCC TAR)
(IPCC TAR)(IPCC TAR)
Precipitation TrendsPrecipitation Trends
(IPCC TAR)(IPCC TAR)
Precipitation TrendsPrecipitation Trends
Surface Vapor Pressure ChangeSurface Vapor Pressure Change
(IPCC TAR)(IPCC TAR)(1975 - 1995)(1975 - 1995)
(IPCC TAR)(IPCC TAR)
Changes Changes in in
ExtremesExtremes
Change in PrecipitationChange in Precipitation
(IPCC TAR)(IPCC TAR)(“Heavy” = above 90th percentile; periods (“Heavy” = above 90th percentile; periods >> 50 yr.) 50 yr.)
Change in Annual Max{5-d Prec.}Change in Annual Max{5-d Prec.}
(IPCC TAR)(IPCC TAR)(period ~ 1946 - 1999)(period ~ 1946 - 1999)
Change in Annual Max{5-d Prec.}Change in Annual Max{5-d Prec.}
(IPCC TAR)(IPCC TAR)(period ~ 1946 - 1999)(period ~ 1946 - 1999)
Changes in Changes in HurricanesHurricanes
(IPCC TAR)(IPCC TAR)
U.S. Landfall U.S. Landfall HurricanesHurricanes
Category 3-5 in Category 3-5 in North AtlanticNorth Atlantic
Changes in TornadoesChanges in Tornadoes
(IPCC TAR)(IPCC TAR)Reported F3-F5 Tornadoes in U.S.Reported F3-F5 Tornadoes in U.S.
(Dashed line = based on storm damage reports)(Dashed line = based on storm damage reports)
(IPCC(IPCC
TAR)TAR)
(IPCC(IPCC
TAR)TAR)
(Mann et al. 1998)(Mann et al. 1998)
NH Reconstructed T vs. Candidate ForcingsNH Reconstructed T vs. Candidate Forcings
Dust Veil IndexDust Veil Index
Log(COLog(CO22))
SolarSolar
NH TemperatureNH Temperature
Correlation of Correlation of 200-yr running 200-yr running average NH average NH temperature vs. temperature vs. forcingsforcings
(IPCC TAR)(IPCC TAR)
Performance of GCMs - Control ClimatesPerformance of GCMs - Control Climates
(IPCC TAR)(IPCC TAR)
Performance of GCMs - Control ClimatesPerformance of GCMs - Control Climates
Note: 50% of earth’s surface is between ±30˚ latitudeNote: 50% of earth’s surface is between ±30˚ latitude
(IPCC TAR)(IPCC TAR)
Performance of Performance of GCMs -GCMs -
Control ClimatesControl Climates
(IPCC TAR)(IPCC TAR)
Performance of GCMs - Control ClimatesPerformance of GCMs - Control Climates
(IPCC TAR)(IPCC TAR)
Performance of GCMs - Control ClimatesPerformance of GCMs - Control Climates
Note: 50% of earth’s surface is between ±30˚ latitudeNote: 50% of earth’s surface is between ±30˚ latitude
(IPCC TAR)(IPCC TAR)
Performance of GCMs - Control ClimatesPerformance of GCMs - Control Climates
(0.5 (0.5 ≥ 50% of 15 models give ice at location) ≥ 50% of 15 models give ice at location)
““Natural Variability” vs. Obs. VariabilityNatural Variability” vs. Obs. Variability
(IPCC TAR)(IPCC TAR)GCMs with no forcing changesGCMs with no forcing changes ObservedObserved
(IPCC TAR)(IPCC TAR)Ensemble of GCMs with solar and volcanic forcing changes Ensemble of GCMs with solar and volcanic forcing changes
Global Model T vs. Obs. TGlobal Model T vs. Obs. T
Global Model T vs. Obs. TGlobal Model T vs. Obs. T
(IPCC TAR)(IPCC TAR)
Ensemble of GCMs with GHG, OEnsemble of GCMs with GHG, O33 and aerosol forcing and aerosol forcing changes changes
(IPCC TAR)(IPCC TAR)
Ensemble of GCMs with natural and anthropogenic forcing changes Ensemble of GCMs with natural and anthropogenic forcing changes
Global Model T vs. Obs. TGlobal Model T vs. Obs. T
(IPCC TAR)(IPCC TAR)
Spatial Distribution of T TrendsSpatial Distribution of T Trends
(IPCC TAR)(IPCC TAR)
Ensemble mean of 5 GCMs (R30 resolution)Ensemble mean of 5 GCMs (R30 resolution)
Spatial Distribution of T TrendsSpatial Distribution of T Trends
Spatial Distribution of T TrendsSpatial Distribution of T Trends
(IPCC TAR)(IPCC TAR)
Grey: Observed trends within the “natural variability” of the R30 GCMGrey: Observed trends within the “natural variability” of the R30 GCM
(IPCC TAR)(IPCC TAR)
Spatial Distribution of T TrendsSpatial Distribution of T Trends
Grey: Observed trends within the “natural variability” of the R30 GCMGrey: Observed trends within the “natural variability” of the R30 GCM
Change in Daily max{T} for June-July-August(RegCM2 simulation: 2040s - 1990s)
Pan et al. (2004)
˚C
Change in Daily max{T}(RegCM2 simulation: 2040s - 1990s)
Pan et al. (2004)
Change in LLJ Frequency [%]
Pan et al. (2004)
RegCM2 simulation: 2040s - 1990s
Change in Soil Moisture [mm]
Changes in Precipitation, Evaporation, Sensible Heat Flux
Pan et al. (2004)
RegCM2 simulation: 2040s - 1990s
Emission Scenarios: Emission Scenarios: Special Report on Emission Scenarios (SRES)Special Report on Emission Scenarios (SRES)
A1 - Very rapid economic growth; global population peaks A1 - Very rapid economic growth; global population peaks ~2050; rapid introduction of new, efficient technologies; ~2050; rapid introduction of new, efficient technologies; substantial reduction of social/econ. differencessubstantial reduction of social/econ. differences
A2 - Very heterogeneous world; continuously increasing A2 - Very heterogeneous world; continuously increasing population; fragmented introduction of new technologiespopulation; fragmented introduction of new technologies
B1 - Very rapid economic growth; global population peaks B1 - Very rapid economic growth; global population peaks ~2050; transition to service/information-based economy; ~2050; transition to service/information-based economy; clean, resource-efficient technologiesclean, resource-efficient technologies
B2 - Very heterogeneous world; continuously increasing B2 - Very heterogeneous world; continuously increasing population (lower than A2); fragmented introduction of population (lower than A2); fragmented introduction of new technologies; oriented toward environmental new technologies; oriented toward environmental protection and social equityprotection and social equity
(Also - IS92 scenarios - older)(Also - IS92 scenarios - older)
(IPCC TAR)(IPCC TAR)
Global T Global T Change: Change:
A2 & B2A2 & B2
(IPCC TAR)(IPCC TAR)
Global Precip. Global Precip. Change: Change:
A2 & B2A2 & B2
(IPCC TAR)(IPCC TAR)
Temperature Change: (2071-2100) minus (1961-1990)Temperature Change: (2071-2100) minus (1961-1990)
Multi-model ave. Multi-model ave. T (colors), range (blue), ave. T (colors), range (blue), ave. T/SDEV (green)T/SDEV (green)
(IPCC TAR)(IPCC TAR)
Temperature Change: (2071-2100) minus (1961-1990)Temperature Change: (2071-2100) minus (1961-1990)
Multi-model ave. Multi-model ave. T (colors), range (blue), ave. T (colors), range (blue), ave. T/SDEV (green)T/SDEV (green)
(IPCC TAR)(IPCC TAR)
Precipitation Change [%]: (2071-2100) minus (1961-1990)Precipitation Change [%]: (2071-2100) minus (1961-1990)
Multi-model ave. Multi-model ave. P (colors), range (red), ave. P (colors), range (red), ave. P/SDEV (green)P/SDEV (green)
(IPCC TAR)(IPCC TAR)
Precipitation Change [%]: (2071-2100) minus (1961-1990)Precipitation Change [%]: (2071-2100) minus (1961-1990)
Multi-model ave. Multi-model ave. P (colors), range (red), ave. P (colors), range (red), ave. P/SDEV (green)P/SDEV (green)
(IPCC(IPCC
TAR)TAR)
(IPCC(IPCC
TAR)TAR)
Twentieth Century Twentieth Century & &
Future TrendsFuture Trends
ENDEND
top related