Results 11 to 20 of about 36,451 (292)

Swiss data quality: augmenting CAMELS-CH with isotopes, water quality, agricultural and atmospheric data [PDF]

Scientific Data
Despite the growth of large-sample hydrology (LSH) datasets, water quality data remain scarce. Here, we introduce CAMELS-CH-Chem, an extension of CAMELS-CH (Catchment Attributes and Meteorology for Large-sample Studies in Switzerland), incorporating up ...
Thiago V. M. do Nascimento, Marvin Höge, Ursula Schönenberger, Sandra Pool, Rosi Siber, Martina Kauzlaric, Maria Staudinger, Pascal Horton, Marius G. Floriancic, Florian R. Storck, Päivi Rinta, Jan Seibert, Fabrizio Fenicia   +12 more
doaj   +2 more sources

Enhanced erosion by continental arc volcanism as a driver of the Cambrian Explosion [PDF]

Nature Communications
Nutrient availability and rising oxygen levels are important for the Cambrian Explosion (~540–515 Ma), both of which can be satisfied via enhanced weathering driven by climate and tectonics.
Yaowen Wu, Hui Tian, Haifeng Fan, Philip A. E. Pogge von Strandmann, Wei Zhao, Jie Li, He Sun, Haiou Gu, Chaojin Lu, Xianyi Liu, Tengfei Li, Sui Ji, Ping’an Peng   +12 more
doaj   +2 more sources

Earth system instability amplified biogeochemical oscillations following the end-Permian mass extinction [PDF]

Nature Communications
After the end-Permian mass extinction, the Earth system underwent extreme ecological and environmental fluctuations, including high temperatures, recurrent oceanic anoxia, and carbon cycle oscillations as demonstrated by the geochemical isotope proxy ...
Zi-Heng Li, Timothy M. Lenton, Fei-Fei Zhang, Zhong-Qiang Chen, Stuart J. Daines   +4 more
doaj   +2 more sources

Stability of the marine nitrogen cycle over the past 165 million years [PDF]

Nature Communications
Nitrogen and phosphorus are the two macro-nutrients that limit biological productivity in the ocean. While the supply of P depends on geological processes, N is biologically supplied from an inexhaustible atmospheric source, but can be limited by micro ...
Linda V. Godfrey, Anne Willem Omta, Eli Tziperman, Xiang Li, Yongyun Hu, Paul G. Falkowski   +5 more
doaj   +2 more sources

Phosphorus desorption and isotope exchange kinetics in agricultural soils [PDF]

Soil Use and Management, 2020
Abstract To improve phosphorus (P) fertilization and environmental assessments, a better understanding of release kinetics of solid‐phase P to soil solution is needed. In this study, Fe (hydr)oxide‐coated filter papers (Fh papers), isotopic exchange kinetics (IEK) and chemical extractions were used to assess the ...
Sabina Braun, Timothy I. McLaren, Emmanuel Frossard, J. R. Marius Tuyishime, Gunnar Börjesson, Jon Petter Gustafsson   +5 more
openaire   +5 more sources

Responses of nitrogen stable isotopes in fish to phosphorus limitation in freshwater wetlands

Knowledge and Management of Aquatic Ecosystems, 2020
Human-induced eutrophication has altered ecological processes in aquatic ecosystems. Detection of ecological changes is a prerequisite for protecting ecosystems from degradation.
Hong Jianming, Gu Binhe
doaj   +1 more source

Characteristics of surface water quality and stable isotopes in Bamen Bay watershed, Hainan Province, China.

PLoS ONE, 2021
Bamen Bay is located at the intersection of the Wenjiao River and Wenchang River in Hainan Province (China), where mangroves have been facing a threat of water quality deterioration. Therefore, it is imperative to study the characteristics of the surface
Julan Guo, Yilei Yu, Gaojie Wu, Muyuan Ma   +3 more
doaj   +1 more source

The Phosphorus/Sulfur Abundance Ratio as a Test of Galactic Cosmic-Ray Source Models [PDF]

, 2001
Galactic cosmic-ray (GCR) elemental abundances display a fractionation compared to solar-system values that appears ordered by atomic properties such as the first ionization potential (FIP) or condensation temperature (volatility).
Binns, W. R., Christian, E. R., Cummings, A. C., George, J. S., Hink, P. L., Leske, R. A., Mewaldt, R. A., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E., Yanasak, N. E.   +10 more
core   +1 more source

Isotopic Fingerprint for Phosphorus in Drinking Water Supplies

Environmental Science & Technology, 2015
Phosphate dosing of drinking water supplies, coupled with leakage from distribution networks, represents a significant input of phosphorus to the environment. The oxygen isotope composition of phosphate (δ(18)OPO4), a novel stable isotope tracer for phosphorus, offers new opportunities to understand the importance of phosphorus derived from sources ...
Gooddy, Daren C., Lapworth, Dan J., Ascott, Matthew J., Bennett, Sarah A., Heaton, Timothy H.E., Surridge, Ben W.J.   +5 more
openaire   +4 more sources

New insights into the early Bajocian (Middle Jurassic) carbon cycle perturbation

Sedimentologika, 2023
Mesozoic strata record numerous negative and positive carbon isotope excursions (CIEs). The Middle Jurassic records a negative ~0.5 ‰ CIE at the Aalenian-Bajocian boundary followed by a positive ~1.5 ‰ CIE covering the entire early Bajocian.
Baptiste Suchéras-Marx, Guillaume Suan, Fabienne Giraud, Emanuela Mattioli, Hassan M. Khozyem, Jean-Charles Mazur, Alicia Fantasia, Jorge E. Spangenberg, Thierry Adatte   +8 more
doaj   +1 more source