The chart plots two-year temperature changes since 1988, with the respective two-year CO2 changes (ppm). It has been 26 years since that testimony-performance, thus there are 13 two-periods plotted on the chart. In addition, the linear trend for the HadCRUT4 gold-standard temperature dataset...
the United Nations warned on Monday, saying countries are falling "miles short" of what's needed to curbdevastating global warming.Levels of the three main greenhouse gases — heat-trapping carbon dioxide, methane and nitrous oxide — all increased yet again last year, said the World Meteorologic...
Global warming is accelerating – the facts • Since the Industrial Revolution, which introduced machinery powered by coal and gas, atmospheric CO2 concentration has increased by about 40%, to above 400 parts per million (ppm).11 Current CO2 levels are 100 ppm higher than at any time in ...
24. Human civilization could probably never have arisen if the Earth's climate had been that sensitive to carbon dioxide, since past CO2 levels (4,000 ppm during the Cambrian period compared to about 410 pmm today) would then presumably have seriously disrupted the evolution of complex life. ...
The issue of increasing CO2 emissions is leading to tracking the global emissions hotspots, which was not an essential concern before the industrial revolution. The CO2 emissions were 280 ppm, and after the industrial revolution, they surpassed 410 ppm [10]. Therefore, it is necessary to target...
Germans are already highly energy efficient and use 53% of total per capita energy that the US does and produce 55% of the CO2 emissions per capita compared to the US. (They are 1.1% of the world’s population and produce 2.4% of world CO2 emissions while the US is 4.4% of the ...
Human emissions of greenhouse gases have increased atmospheric concentrations of CO2, methane and nitrous oxide to their highest levels in at leasta few million years— if not longer. The figure below shows concentrations of these greenhouse gases — inparts per million(ppm) for CO2 (blue line)...
Fernández-Martínez等人[325]进一步发现在1995~2014年间, 大气CO2浓度升高使全球陆地NEP增加3.1~8.1 Pg C/100 ppm. 最近的一项研究认为, 1982~2015年间CO2施肥效应对全球大部分陆地生态系统总初级生产力(gross primary productivity, GPP)的促进作用呈下降趋势, 意味着陆地碳汇对气候系统的负反馈效应正在...
In almost all of the world’s cities, these assumptions are completely unrealistic. They were unrealistic before the Covid disruptions; they are even more so now. Given this, it is worth asking a question rarely asked: are our local institutions actually up to the job of managing a rapid,...
(Mixed Cellulose Ester filter, 0.22 µm) to retain the dissolved fraction. In the laboratory, we injected 2 mL streamwater into pre-flushed (synthetic air,pCO2 < 5 ppm) exetainers containing 300 µL of 85% orthophosphoric acid. Samples were then shaken (2 min) and ...