暂停,间歇
发表于 2025-3-28 15:35:21
Po-210 in the Environment: Biogeochemical Cycling and Bioavailabilitye largely deficient in the euphotic zone. Globally, .Po deficiency increases as ocean productivity decreases in the upper 1,000 m through biological transfer to the upper trophic levels. Smaller .Po deficiencies in the productive areas of the ocean appear to be related to relatively active bacterial
WATER
发表于 2025-3-28 20:57:52
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Constant
发表于 2025-3-29 01:29:08
Radium Isotope Tracers to Evaluate Coastal Ocean Mixing and Residence Timesibed here is valid, although each has its own advantages and disadvantages. Examples of mixing among different end-members are given as case studies. All approaches presented here demonstrate the utility of radium isotopes for the evaluation of water mass mixing and residence times.
Flagging
发表于 2025-3-29 03:43:29
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合并
发表于 2025-3-29 10:15:42
https://doi.org/10.1007/978-3-658-34231-9 Short-lived nuclides that can be used to measure time are continuously produced from nuclear reactions involving cosmic rays, both within the atmosphere and exposed surfaces, and from decay of long-lived isotopes. Nuclear activities have produced various isotopes that can be used as atmospheric and
Complement
发表于 2025-3-29 11:40:12
Marco Trentini,Massimo Angelo Zanettithe last 10 years. This chapter relates our current understanding of lithium isotope and elemental behaviour in the Earth’s surface environment. In the introduction, we provide information on the chemical properties and behaviour of lithium, its occurrence and applications. The first section reviews
Nuance
发表于 2025-3-29 17:47:29
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ABYSS
发表于 2025-3-29 21:49:36
Ulrich von Alemann,Rolf G. Heinzens can lead to the fractionation of stable silicon (Si) isotopes, which allows variations in Si isotopic ratios to be used to quantify the global Si cycle. Here, I detail the methods and applications of assessing variations in continental Si stable isotope compositions, and show how such studies can
Pepsin
发表于 2025-3-30 00:08:37
Marco Trentini,Massimo Angelo Zanettigrowth, and the large spread in mass between calcium isotopes all suggest that calcium isotope biogeochemistry can be an important avenue of insight into past and present biogeochemical cycling processes. In the following chapter, we review the main areas of research where Ca isotope studies have be
surmount
发表于 2025-3-30 06:18:52
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