Yesterday was Super Tuesday, when voters in 16 states and one U.S. territory cast ballots in the largest primary election day of the 2024 cycle. President Joe Biden secured victories …
Yesterday was Super Tuesday, when voters in 16 states and one U.S. territory cast ballots in the largest primary election day of the 2024 cycle. President Joe Biden secured victories …
A new U.N. report sheds light on how climate change is driving some climate-vulnerable nations deeper into debt, locking them into unsustainable cycles of economic crisis and hampering their governments’ …
Icebergs from Breiðamerkurjökull Glacier floating in Iceland’s Jokulsarlon glacier lake, with snow-capped mountains in the background. (Txetxu/Flickr.) Rising temperatures and melting ice play a central role in the unfolding Anthropocene—i.e., …
Source: Journal of Geophysical Research: Biogeosciences This is an authorized translation of an Eos article. 本文是Eos文章的授权翻译。 最近大气中甲烷 (CH4) 含量的上升引起了人们对这种强效温室气体的更多关注,这种温室气体在大气中吸收热量的能力大约是二氧化碳的 45 倍。 全球约 60% 的甲烷排放是人为造成的,主要来自化石燃料燃烧以及交通和农业部门的其他活动。 甲烷排放的其余部分来自自然生态系统过程。 热带湿地是甲烷最大的天然来源,但对其排放量的估计并不确定。造成这种不确定性的一个原因可能是树干的贡献缺乏约束,这一问题在最近的一篇论文中被称为“全球碳循环的新前沿”。树木茎干排放的过程多种多样,包括潮湿或腐烂的心材中产生的微生物、腐殖性真菌以及通过植物组织运输和排放的土壤甲烷。 Jeffrey等人量化了以阔叶白千层 (Melaleuca quinquenervia)为主的澳大利亚亚热带森林湿地中树干甲烷排放的年度和季节变化。这是首个对湿地树木树干一年排放进行监测的研究。 研究人员测量了被洪水淹没的阔叶白千层树林的甲烷排放量。图片来源:Luke …
The government aims to cut the amount of energy needed for its economic growth by 2.5% in 2024, putting it far off track for a key five-year climate target China …