Oligocene deep ocean oxygen isotope variations primarily driven by temperature [0.03%]
始新世深海氧同位素变化主要受温度控制
Flavia Boscolo-Galazzo,Victoria E Taylor,Eirik V Galaasen et al.
Flavia Boscolo-Galazzo et al.
Our understanding of the long-term behaviour of global climate and the Antarctic ice sheet relies heavily on the oxygen isotopic composition of marine calcite (δ18Ocalcite), which reflects a combination of ocean temperature and the amount ...
Zonally asymmetric changes in the Antarctic Circumpolar Current strength over the past million years [0.03%]
过去一百万年来南极绕极流强度的带状不对称变化
Shuzhuang Wu,Alain Mazaud,Elisabeth Michel et al.
Shuzhuang Wu et al.
The Antarctic Circumpolar Current (ACC) plays a central role in regulating the global ocean circulation, climate and Antarctic Ice Sheet dynamics. Yet the spatiotemporal variability of the ACC during the Pleistocene remains poorly constrain...
Sedimentary conditions drive modern pyrite burial flux to exceed oxidation [0.03%]
沉积条件使得现代黄铁矿的埋藏通量超过氧化通量
Cornelia Mertens,Sarah Paradis,Jordon D Hemingway
Cornelia Mertens
Pyrite (iron sulfide) formation and burial in sediments decreases atmospheric CO2 and increases O2 levels. However, the environmental and sedimentological conditions that regulate pyrite burial remain poorly constrained. Here we investigate...
Late Miocene Arctic warmth and terrestrial climate recorded by North Greenland speleothems [0.03%]
北极晚中新世的温暖和陆地气候记录——来自北格陵兰的石笋证据
Gina E Moseley,Gabriella Koltai,Jonathan L Baker et al.
Gina E Moseley et al.
The sensitivity of terrestrial Arctic climate during the Late Miocene remains poorly understood, despite this interval marking the transition towards a cooler, more variable global climate and the prelude to Northern Hemisphere glaciation. ...
Rosalind M Coggon,Elliot J Carter,Lewis J C Grant et al.
Rosalind M Coggon et al.
Calcium carbonate precipitation in ageing ocean crust sequesters carbon dioxide dissolved in seawater through seafloor weathering reactions, influencing atmospheric CO2 concentrations on million-year timescales. However, this crustal carbon...
Dramatic decline of Sargassum in the north Sargasso Sea since 2015 [0.03%]
2015年以来北大西洋马尾藻海的马尾藻数量急剧下降
Yingjun Zhang,Brian B Barnes,Deborah S Goodwin et al.
Yingjun Zhang et al.
The Sargasso Sea, at the centre of the North Atlantic subtropical gyre, draws its name from the endemic floating brown macroalgae, Sargassum, which provides shelter and habitat for life in the pelagic zone. In 2011, the Sargassum footprint ...
Presence of continental slivers in oceanic transform faults determined by rift inheritance [0.03%]
大陆碎片在洋中脊转换断层中的存在性由裂谷继承性决定
Attila Balázs,Taras Gerya,Gábor Tari
Attila Balázs
The theory of plate tectonics describes how continents are separated from each other by lateral movement that is accommodated by transform faults connecting mid-ocean ridge sections, which leaves inactive fracture zones on the ocean floor. ...
Alastair G C Graham,Anna Wåhlin,Kelly A Hogan et al.
Alastair G C Graham et al.
Understanding the recent history of Thwaites Glacier, and the processes controlling its ongoing retreat, is key to projecting Antarctic contributions to future sea-level rise. Of particular concern is how the glacier grounding zone might ev...
Minor contribution of ammonia oxidizers to inorganic carbon fixation in the ocean [0.03%]
海洋中氨氧化剂固碳作用的贡献较小
Barbara Bayer,Katharina Kitzinger,Nicola L Paul et al.
Barbara Bayer et al.
Ammonia-oxidizing archaea are the most abundant chemolithoautotrophs in the ocean and are assumed to dominate carbon fixation below the sunlit surface layer. However, the supply of reduced nitrogen delivered from the surface in sinking part...
Geodynamics of a global plate reorganization from topological data analysis [0.03%]
基于拓扑数据分析的全球板块重组地球动力学研究
Alexandre Janin,Nicolas Coltice,Nicolas Chamot-Rooke et al.
Alexandre Janin et al.
Earth's lithosphere is fragmented into tectonic plates that move relative to each other and the mantle, following a dynamic equilibrium that evolves over time. Sporadically, abrupt kinematic changes occur that typically lead to regional-sca...