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"The Paris agreement aims to limit the increase in average global surface temperatures to less than 2 degrees Celsius relative to pre-industrial levels," science and technology daily Du Yingjin said.
, given recent trends in CO2 emissions, we find that only wet areas can accept this target, and arid areas will be at greater risk of warming.
is necessary to keep global temperature increases within the 1.5C target.
Recently, a team led by Huang Jianping, a professor at Lanzhou University's School of Atmospheric Sciences, said in the journal Nature-Climate Change.
a century ago, the world's arid and semi-arid zones have warmed 20 to 40 percent more than wet areas, but their man-made carbon dioxide emissions are only about 30 percent of those in wet areas, according to the study.
" Arid semi-arid zones, which account for 42 per cent of the world's land area, feed 38 per cent of the world's population and are mainly distributed in poor and backward developing countries, and if global warming is 2 degrees Celsius, arid semi-arid zones will suffer from climate disasters such as reduced maize production, reduced surface runoff, increased drought and malaria transmission.
," Huang Jianping explained.
the poor and backward arid semi-arid zones, which emit negligible greenhouse gases, suffer much more from climate disasters than developed countries in wet zones with high greenhouse gas emissions.
Haipeng, a member of the group, said.
observations show that arid areas have experienced significant warming and that ecosystems are at greater risk of land degradation and desertification due to their fragility.
the study not only found the above phenomena from the observation and climate pattern data, but also theoretically proposed the energy balance mechanism that caused the above phenomena.
estimates show that when the average global warming in the future is 2 degrees C, the humid zone heats up to only 2.4 degrees C to 2.6 degrees C, while the arid semi-arid zones warm up or reach 3.2 degrees C-4. Climate disasters, such as reduced maize production, reduced surface runoff, increased drought and malaria transmission, are most severe in arid and semi-arid zones, further widening regional disparities in global socio-economic development.
.