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Understanding Global Warming of 1.5oC from IPCC Report 2018

Understanding Global Warming of 1.5oC from IPCC Report 2018
  1.            Human activities are estimated to have caused approximately 1.0oC pre-industrial levels, with a likely range of 0.8oC to 1.2oC. Global warming is likely to reach 1.5oC between 2030 to 2052(high confidence).

2    2.    Warming from anthropogenic emissions from the pre-industrial period to the present will persist for centuries to millennia and will continue to cause further long-term changes in the climate system, such as sea level rise, with associated impacts (high confidence) but these emissions alone are unlikely to cause global warming of 1.5oC (medium confidence). Anthropogenic emissions up to present are unlikely to cause further warming of more than 0.5oC over the next two to three decades or on a century time scale. Reaching and sustaining net zero global anthropogenic CO2 emissions and declining net non-CO2 radiative forcing would halt anthropogenic global warming on multi-decadal time scales.

3.   Climate related risks for natural and human systems are higher for global warming of 1.5oC than at present but lower than at 2oC. These risks depend on the magnitude and rate of warming, geographical location, levels of development and vulnerability, and on the choices and implementation of adaptation and mitigation options.

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