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-Climate Change 2007: The Physical Science Report-
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(2) SPM: Summary for Policymakers
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[Âü°íÀÚ·á]
FIGURE SPM-1.
Atmospheric concentrations of carbon dioxide, methane and nitrous oxide over the last 10,000 years (large panels) and since 1750 (inset panels). Measurements are shown from ice cores (symbols with different colours for different studies) and atmospheric samples (red lines). The corresponding radiative forcings are shown on the right hand axes of the large panels.
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±×¸² 1. ÁÖ¿ä ¿Â½Ç°¡½ºÀÇ ³óµµº¯È °æÇâ |
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FIGURE SPM-2. Global-average radiative forcing (RF) estimates and ranges in 2005 for anthropogenic carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and other important agents and mechanisms, together with the typical geographical extent (spatial scale) of the forcing and the assessed level of scientific understanding (LOSU). The net anthropogenic radiative forcing and its range are also shown. These require summing asummetric uncertainty estimates from the component terms, and cannot be obtained by simple addition. Additional forcing factors not included here are considered to have a very low LOSU. Volcanic aerosols contribute an additional natural forcing but are not included in this figure due to their episodic nature. Range for linear contrails does not include other possible effects of aviation on cloudiness.
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±×¸² 2. ¿Â½Ç°¡½º, ¿¡¾î·¯¼Ö µîÀÇ º¹»ç°Á¦·Â |
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FIGURE SPM-3. Observed changes in (a) global average surface temperature; (b) global average sea level rise from tide gauge (blue) and satellite (red) data and (c) Northern Hemisphere snow cover for March-April9 All changes are relative to corresponding averages for the period 1961-1990. Smoothed curves represent decadal averaged values while circles show yearly values. The shaded areas are uncertainty intervals estimated from a comprehensive analysis of known uncertainties (a and b) and from time series (c).
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±×¸² 3. À§¼º°ú °üÃø±â¿¡ ÀÇÇÑ ±â¿Â, Çؼö¸é ¹× Àû¼³ |
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FIGURE SPM-4. Comparisons of observed continental- and global-scale changes in surface temperature with results simulated by climate models using natural and anthropogenic forcings, Decadal averages of observations shown for the period of 19062005 (black line) plotted against the centre of the decade and , relative to the corresponding average for 19011950 . Lines are dashed where spatial coverage is less than 50%. Blue shaded bands show the 595% range for 19 simulations from 5 climate models using only by natural forcings due to solar activity and volcanoes. Red shaded bands show the 595% range for 58 simulations from 14 climate models using both natural and anthropogenic forcings
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±×¸² 4. 1906¢¦2005³â°£ÀÇ Áö±¸ ¶Ç´Â ´ë·ú±Ô¸ðÀÇ ±â¿Â º¯È |
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1) IPCC: Intergovernmental Panel on Climate Change(1988³â ¼¼°è±â»ó±â±¸¿Í À¯¿£È¯°æ°èȹÀÌ °øµ¿ ¼³¸³)
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