Results 101 to 110 of about 158,813 (385)
People and Nature, EarlyView.Abstract Longer‐term perspectives—equivalent to the lifespans of long‐lived trees—are required to fully inform perceptions of ‘naturalness’ used in woodland conservation and management. Stand‐scale dynamics of an old growth temperate woodland are reconstructed using palaeoecological data.
Annabel Everard +4 more
wiley +1 more source
Isotope characterisation of deep aquifers in the Gwda catchment, northern Poland
Geologos, 2016 We present the results of isotope measurements (δ18O, δ D, δ13CDIC and 14C) and chemical analyses (TDS, TOC, HCO3-, SO42-, Cl-, NO3-, NH4+, Ca2+, Mg2+ Na+ and K+) conducted on groundwater samples collected from deep Cenozoic aquifers.
Kotowski Tomasz, Satora Stefan
doaj +1 more source
Marine radiocarbon reservoir effect of coastal waters off Cape Verde archipelago [PDF]
, 2011 Quantification of the marine radiocarbon reservoir effect (Delta R) is essential in order to calibrate conventional C-14 dates from marine shell samples with reliability.
Ascough +7 more
core +1 more source
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
Nature Communications, 2018 Though tree-ring chronologies are annually resolved, their dating has never been independently validated at the global scale. Moreover, it is unknown if atmospheric radiocarbon enrichment events of cosmogenic origin leave spatiotemporally consistent ...
U. Büntgen +73 more
semanticscholar +1 more source
Permafrost and Periglacial Processes, EarlyView.ABSTRACT The amount and stratigraphic setting of ground ice in permafrost slopes is a key control on the style and magnitude of permafrost mass wasting. Understanding the spatial and stratigraphic variations in ground ice distribution on permafrost slopes is therefore a fundamental property in assessing the stability of permafrost hillslopes.
Joseph M. Young +2 more
wiley +1 more source
Insights on the changing dynamics of cemetery use in the neolithic and chalcolithic of southern Portugal. Radiocarbon dating of Lugar do Canto Cave (Santarém) [PDF]
, 2014 Lugar do Canto Cave is one of the most relevant Neolithic burial caves in Portugal given not only its extraordinary preservation conditions at the time of discovery but also the quality of the field record obtained during excavation. Its material culture
Carvalho, António, Luis Cardoso, Joao
core +4 more sources
Detecting and attributing climate change effects on vegetation: Australia as a test case
PLANTS, PEOPLE, PLANET, EarlyView.Climate change is contributing to vegetation changes that threaten life support systems. Yet, inherent climatic variability and past and present human actions—such as clearing, burning and grazing regimes—also alter vegetation and complicate understanding of vegetation change. Australian ecosystems exemplify such complexity.
Laura J. Williams +14 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2023 In the past century, most eruptions of Steamboat Geyser in Yellowstone National Park's Norris Geyser Basin were mainly clustered in three episodes: 1961–1969, 1982–1984, and ongoing since 2018. These eruptive episodes resulted in extensive disturbance to
Shaul Hurwitz +7 more
doaj +1 more source
Exploring site formation and building local contexts through wiggle-match radiocarbon dating: re-dating of the Firth of Clyde Crannogs, Scotland [PDF]
, 2017 There are at least four wooden intertidal platforms, also known as marine crannogs, in the Firth of Clyde, on the west coast of Scotland. The interpretation of these sites partly depends on their dating and, if coeval, they could point to the presence of
Cook, Gordon +3 more
core +1 more source
Fine and Coarse Carbonaceous Aerosol in Houston, TX, during DISCOVER-AQ
Atmosphere, 2020 To investigate major sources and trends of particulate pollution in Houston, total suspended particulate (TSP) and fine particulate matter (PM2.5) samples were collected and analyzed.
Subin Yoon +2 more
doaj +1 more source