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Published byMarjorie Rice Modified over 9 years ago
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Drift of solar constants for the Earth (1), Venus (2) and Marc (3) due to increasing of Sun’s luminosity. Within an interval formed by carves 4 and 5 the Earth’s type of climate is not principally varied.
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Variation of СО 2 concentration in the atmosphere
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Temperature deviation from today’s value 1 – calculation [Budyko et al., 1985] 2 – interpretation of proxy indicators [Frakes, 1979]
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Variation of СО 2 concentration in the atmosphere
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Measured concentration of 18 O in surface planktonies [Imbrie et al., 1984] 5e5e 5d5d 1 2 6 1, 2, 5e, 5d, 6 are some isotopic stages
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Changes of temperature in north western part of Russian Plane ( 0 C) [Klimanov, 1996.] July JanuaryYear YD Al YD – Younger Dryas, Al – Allered, AT – Atlantic warm event AT
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Northern summer temperature changes ( 0 С) [Bradley, Jones, 1993] Temperature changes ( 0 С), based on measurements in holes Changes of Alpian glacier’s length [Oerlemans, 1994] Glaciers: 1 – Untere Grindelwaldgletscher, 2 – Rhonegletscher, 3 – Glacier d’Argentiere
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Climate dynamics and insolation change during last 140 тыс. лет Parameters of the Earth’s orbit 10 3 years BP eccentricity obliquity precession summerwinter Insolation at the top of the atmosphere 18 O
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Latitude-month distribution of the difference in insolation (W/m 2 ) between 21 and 6 ka and the present 21 ka BP 6 ka BP
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Equation of the general circulation model (GCM) dX/dt=F, X=X(0)
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Global surface air temperature 21 ka BP-control from different GCMs Simulations forced by CLIMAP SSTs Simulations with atmosphere-mixed layer ocean model
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Mean annual temperature anomalies (LGM minus modern) averaged by PMIP models Sites where LGM temperatures have been reconstructed
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Comparison between reconstructed and simulated mean annual temperatures anomalies (LGM minus modern) over the land for all available sites
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Comparison between reconstructed and simulated mean annual temperatures anomalies (LGM minus modern) over the land for the sites from the areas with simple topography and environments 1 – Western Europe and North Africa 2 - East European Plane 3 – North-East North America 4 – West Siberian Plane 5 – Eastern Siberia and Chukotka 6 – Greenland 7 – Antarctica 8 – Mongolia and North China 9 – Brazil 10 – South Africa 11 – Australia
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Comparison between reconstructed and simulated mean annual temperatures anomalies (LGM minus modern) over the land averaged by the regions pointed in the legend 1 – Western Europe (9) and North Africa (1) 2 - East European Plane (5) 3 – North-East North America (4) 4 – West Siberian Plane (10) 5 – Eastern Siberia and Chukotka (6) 6 – Greenland (1) 7 – Antarctica (1) 8 – Mongolia (2) and North China (2) 9 – Brazil (1) 10 – South Africa (2) 11 – Australia (1)
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Mean annual precipitation anomalies (LGM minus modern) averaged by PMIP models
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Latitude-month distribution of the difference in insolation (W/m 2 ) between 21 and 6 ka and the present 21 ka BP 6 ka BP
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PMIP-model averaged temperature anomalies ( 0 С) and anomalies of precipitation (mm/day) 6 ka BP (june, july, august)
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Relationship between precipitation changes over northern India and changes of surface air temperature over central Asia models
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Temperature ( 0 C) and precipitation (mm/day) anomalies for July, 6-0 ka BP Simulated and recorded temperature anomalies over land MSU model
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Changes in zonal annual mean precipitation averaged over Northern Africa (6 – 0 ka BP, PMIP results) Max and min bounds for the excess precipitation to support grassland
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Changes in zonal annual mean precipitation averaged over Northern Africa (6 – 0 ka BP, PMIP results) and impact of ocean feedback Coupled atmosphere-ocean simulation
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Changes of temperature in north western part of Russian Plane ( 0 C) [Klimanov, 1996.] July JanuaryYear YD Al YD – Younger Dryas, Al – Allered, AT – Atlantic warm event AT
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Scheme of glaciation of the North America during the Younger Dryase and routes of meltwater discharge
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Time series of the deviation of salinity, sea surface temperature ( 0 C) and ice (sm) from their initial values in the Denmark Strait Fresh water input to the northern North Atlantic (1250-year time integration of GFDL model) Response of the thermochaline circulation of the North Atlantic to fresh water input to its northern part (1) and Caribean region (2)
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Measured concentration of 18 O in surface planktonies [Imbrie et al., 1984] 5e5e 5d5d 1 2 6 1, 2, 5e, 5d, 6 are some isotopic stages
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White noice Red noice Milankovitch cycles
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Red noice
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Oscillator for global climate change dT/dt= T(t)+v = 1 + 2 + 3 … Scaling time and T denotes the delta-function is the nondimensional delay, measures the influence of the returning signal
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Linear stability analysis T 0 =0, (1- ) 1/2 T 0 - T 0 -T 0 3 =0 0.5 0 5 10 y=T-T 0 Perturbation from the stationary solution The neutral curve:
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