Un monde plus chaud de 1,5°C: à quelle échéance et quelles conséquences ?

Buzz Plus

Le climat mondial a une chance sur deux d'atteindre dans une dizaine d'années la barre de 1,5°C de réchauffement depuis l'ère préindustrielle, limite la plus ambitieuse de l'Accord de Paris de 2015. - L'info en continu  https://buzzplus.fr/ Infos, news & actualités - L'information internationale en direct.

Transcript

00:00 The global climate has a chance out of two to reach the 1.5°C warming bar in a decade

00:05 since the pre-industrial era, the most ambitious limit of the Paris Agreement in 2015.

00:10 Why and with what consequences?

00:13 When will the 1.5°C bar really be reached?

00:17 The GIC, which brings together experts on climate mandated by the UN,

00:21 states that the years 2011 to 2020 were about 1.1°C warmer than in the 1850s to 1900s,

00:28 before the effects of greenhouse gas emissions of the industrial revolution.

00:32 But with continuous warming and demodellization,

00:35 the scientific community generally believes that the current climate is already 1.2°C warmer.

00:41 For the first time, the 1.5°C bar has just been exceeded over 12 months.

00:47 But this measure must be reached on average in at least 20 or 30 years to be considered as a climate standard.

00:53 At the current rate of emissions, this threshold of 1.5°C has a chance out of two to be reached

00:58 on average over five years during the years 2030 to 2035, as the GIC has logically stated in its latest report.

01:05 Some regions of the world have already reached a sustainable warming of 1.5°C,

01:09 this is the case of France, plus 1.7°C, in a Europe that warms up twice as fast as the world average.

01:17 In Australia, the Meteorology Bureau announced Thursday that the local climate

01:21 has warmed up to about 1.5°C since the start of national measures in 1910.

01:27 Even if 1.5°C is reached globally,

01:30 the decrease in emissions is crucial to stay below 2°C,

01:34 the maximum limit of the Paris Agreement, but also to avoid every tenth of a degree more.

01:40 Because each increase in global warming will intensify the multiple and concomitant risks,

01:45 the GIC warns that a deep, fast and sustained reduction in emissions would lead to a noticeable slowing

01:52 of global warming over the space of about two decades.

01:55 What impacts in a world with a temperature of 1.5°C?

01:59 Warmer and longer heat waves, stronger rainfall in some regions,

02:04 synonyms of flooding, and more droughts in others,

02:07 the main effects, already visible, of climate change would still be accentuated.

02:12 The extreme heat, in the Middle Latitudes, North America, Europe, Central Asia and China,

02:18 would be on average 3°C warmer, estimated by the GIC in 2018 in a special report.

Category

Transcript

Recommended