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熹微 · 2023年08月07日

不是1.5°C吗?

NO.PZ2022120701000021

问题如下:

The Paris Agreement:

选项:

A.is legally binding under the local law of each signatory country. B.requires every signatory to provide an annual update on its national emission commitments. C.aims to limit the increase in global average temperature to 2°C above pre-industrial levels by the end of the century.

解释:

The aim of the international Paris Agreement on climate change is to pursue efforts to limit the temperature increase to 2°C (3.6°F) above pre-industrial levels by the end of the century The Paris Agreement does not set any legally binding targets under international law Signatories to the Paris Agreement are required to determine, plan, and report on its NDCs, with updates to commitments every five years

不是1.5°C吗?1.5°C和2°C的区别是什么呀

1 个答案

Tina_品职助教 · 2023年08月07日

嗨,努力学习的PZer你好:


《巴黎协定》的主要目标是限制全球平均温度的增加在本世纪末达到工业化前水平以上的2°C以下,并努力将增幅限制在1.5°C以下。所以,答案C是正确的,但要注意它同时提到了这两个数字。

1.5°C与2°C的区别:

两个目标都是为了减少全球变暖的负面影响,但限制在1.5°C的效果会比2°C要好。这其中的差异包括:

  • 海平面上升:相比2°C,1.5°C的上升会减少大约0.1米的海平面上升,这将意味着减少10%的人口受到相关风险。
  • 极端天气:1.5°C的增幅将会减少热浪、强降雨、干旱等极端天气事件的频率和强度。
  • 生态系统:限制在1.5°C的上升可以避免70-90%的冰川退缩,而2°C可能会导致几乎全部的冰川退缩。此外,1.5°C的增幅将导致较少的珊瑚礁消失,虽然损失仍然会很大。
  • 经济影响:更大的温度上升可能会导致更大的经济损失,特别是在发展中国家。

总的来说,尽管1.5°C和2°C之间的差异只有0.5°C,但它们对全球气候、生态系统和人类社会的影响是显著的。这也是为什么《巴黎协定》特别强调努力将温度增幅限制在1.5°C以下的原因

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

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