这不是错觉,夏天真的一年比一年热
中国天气网推出了全国高温“点火”预警地图,经过分析发现,从1981年至2018年的平均数据统计来看,北方火炉“点”得早,“熄”得也早,相比之下,江南华南火炉耐力更足。
《科学》(20220506出版)一周论文导读
Abstract:Antarctica’s fast-flowing ice streams drain the ice sheet, with their velocity modulated by subglacial water systems. Current knowledge of these water systems is limited to the shallow portions near the ice-bed interface, but hypothesized deeper groundwater could also influence ice streaming. Here, we use magnetotelluric and passive seismic data from Whillans Ice Stream, West Antarctica, to provide the first observations of deep sub–ice stream groundwater. Our data reveal a volume of groundwater within a >1-kilometer-thick sedimentary basin that is more than an order of magnitude larger than the known subglacial system. A vertical salinity gradient indicates exchange between paleo seawater at depth and contemporary basal meltwater above. Our results provide new constraints for subglacial water systems that affect ice streaming and subglacial biogeochemical processes.
学科前沿:高水平国际期刊地学论文导读
Global thermal spring distribution and relationship to endogenous and exogenous factors。
用“遮阳伞”为地球降温?太阳辐射干预的诱惑与风险
全球正步入“高烧”时代,一些科学家把目光投向一种听上去近乎科幻的降温方案——通过反射阳光,让地球“少晒一点”。
《自然》(20220609出版)一周论文导读
摘要:在此,我们展示了亚马逊地区西南大草原的卡萨阿拉比文化遗址的激光雷达数据,揭示了在一个密集的四层聚落系统中存在的两个巨大遗址。
为啥与游客接触越多,这帮猴子越爱吃土?
直布罗陀位于欧洲伊比利亚半岛南端,是英国的一块海外领地。这里生活着欧洲唯一一群自由活动的猴子:巴巴里猕猴。巴巴里猕猴母子图源:Vitold Muratov / Wikipedia不过最近,科学家发现这群猴子出现了一种特别的习惯,爱吃土。
澎湃思想周报|逝者的数字生命能否永生;警惕气候民粹主义
逝者的数字生命能永生吗?在科幻美剧《万神殿》的片头,一位端坐的希腊女神像身体和头脑逐渐被剥离,重新在虚空中形成一个新的人像。由此隐喻人类意识被上传到了云端,新的“数字生命”诞生。