Time scales and gaps, Haar fluctuations and multifractal geochronologies [0.03%]
时间尺度和缺口，Haar 振荡及多重分形地层学
Shaun Lovejoy,Rhisiart Davies,Andrej Spiridonov et al.
Shaun Lovejoy et al.
Outcrops and cores are primary sources of information about the Earth's past. Quantitative analyses rely on geochronologies that take into account highly variable sedimentation and erosion rates as well as gaps from missing strata. Using 23...
Abrupt Gulf Stream path changes are a precursor to a collapse of the Atlantic Meridional Overturning Circulation [0.03%]
突变的湾流路径变化是大西洋经向翻转环流崩塌的前兆
René M van Westen,Henk A Dijkstra
René M van Westen
The Gulf Stream is part of the Atlantic Meridional Overturning Circulation (AMOC). The AMOC is a tipping element and may collapse under changing forcing. However, the role of the Gulf Stream in such a tipping event is unknown. Here, we inve...
Environmental variability shapes biodiversity and protected area priorities in Canada [0.03%]
环境变化影响加拿大生物多样性和保护区优先事项
Rekha Marcus,Stefano Mezzini,Dwija Desai et al.
Rekha Marcus et al.
Priority areas are typically identified based on mean conditions, while ignoring variance around the mean (i.e., "stochasticity'). This is problematic as high environmental stochasticity can increase extinction risk and reduce the effective...
Yuhji Yamamoto,Slah Boulila,Futoshi Takahashi et al.
Yuhji Yamamoto et al.
One of the most intriguing attributes of Earth's magnetic field is that it reverses polarity. Previous palaeomagnetic records mainly from the last ~17 million years indicate that the reversal process typically occurs over ten thousand or fe...
Zackry Stevenson,Dylan L Schultz,Michelle Chamberlain et al.
Zackry Stevenson et al.
Archean ocean marine primary productivity may have been limited by biologically available nitrogen. Due to low molybdenum abundances, early biological nitrogen fixation is thought to have relied on alternative nitrogenases that incorporate ...
Oxidative uptake of Ce by oceanic ferromanganese crusts and implications for paleoredox estimates using Ce isotopes [0.03%]
铈氧化吸收作用与海洋铁锰结壳古氧化还原条件估算中的示踪意义
Alain Manceau,Jianlin Liao,Yan Li et al.
Alain Manceau et al.
The oxidative enrichment and isotopic fractionation of cerium (Ce) in contact with vernadite (δ-MnO2) serve as a proxy for past redox conditions in both terrestrial and marine environments. However, the molecular processes that govern the ...
Richard G Williams,Peter J Brown,Yohei Takano et al.
Richard G Williams et al.
The Gulf Stream is important for the climate system through its transport and air-sea exchange of heat. What is less well accepted is the role of the Gulf Stream in the carbon cycle. Here we examine how the Gulf Stream provides a "biogeoche...
Diatom lipids open window to past ocean temperatures in the polar regions [0.03%]
极地海洋过去温度的调控因子——硅藻脂质的作用
Simon T Belt,Lukas Smik,Denizcan Köseoğlu et al.
Simon T Belt et al.
Sea surface temperature is a key indicator of climate change on Earth and is central to all related modelling endeavours. However, sea surface temperature is notoriously difficult to reconstruct accurately in the geological record, especial...
Robert Sarpong,Ali Nazemi,Amir AghaKouchak
Robert Sarpong
Snow water is key to water supply in cold regions and beyond. Here we introduce Snow Water Availability that quantifies water stored in the snow-covered portion of an area. By integrating a plausible set of available gridded datasets for sn...
Mara A Freilich,Lilian A Dove,Katarina Merk
Mara A Freilich
The surface and interior ocean are connected through physical processes that act in three dimensions and on subseasonal timescales. Numerical models and observations both highlight the importance of these eddying dynamics on shaping the bio...