Weather extremes from anthropogenic global warming

摘要: Although sea levels are predicted to rise 1 2 meters by 2100, the more immediate effects of global warming weather extremes. The number natural disasters since 1996 costing $1 billion or doubled compared with previous 15-year period. Extreme summer heat anomalies now cover about 10% land area, up from 0.2% in 1950-1980. human influence on is evident climate data and physical modeling. Since beginning industrial era, carbon dioxide (CO2) increases correlate those temperature. Carbon dating shows that CO2 increase burning ancient fossil fuels. Increasing other greenhouse gases blanket warm earth’s surface, allowing less reach stratosphere, which cooling. This consistent satellite measurements showing solar irradiance not changing. present rate ppm/year 300 times higher than at earth recovered ice age 18,000 years ago. Without radiative forcing noncondensing persistent CO2, terrestrial would collapse, plunging into an icebound state. Will new technologies lower our emissions time prevent extremes? Electric cars get equivalent 100 miles per gallon. cost electricity photovoltaic cells has reached grid parity.