相关实验视频

Updated: Jun 5, 2025

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

加强最近的泥炭年代的潜力

Anna Cwanek¹, Marco A Aquino-Lopez², Piotr Kołaczek³

¹Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342, Cracow, Poland.

Journal of environmental radioactivity

|December 10, 2024

概括

这项研究使用了-210 (210Pb) 约会来准确地重建中欧泥炭地中的年龄. 梅子法为各种泥炭地类型提供了可靠的时间表,证实了约会模型的一致性.

科学领域:

地质时间学 (Geochronology)
环境科学环境科学
放射化学放射化学是指辐射化学.

背景情况:

泥地是环境历史的重要档案.
准确的约会泥炭沉积物对于了解过去的环境变化至关重要.
传统的约会模型可能会受到复杂的泥炭形状的挑战.

研究的目的:

重建中欧泥炭地的高分辨率年龄模型.
评估Plum方法的性能,并将其与经典约会模型进行比较.
评估-210 (210Pb) 和其他放射性同位素的可靠性,以测定泥炭年代.

主要方法:

高分辨率的年龄重建使用210Pb作为主要的地质计.
使用碳-14 (14C) 和-239+240 (239+240Pu) 放射性同位素进行测年验证.
在经典的恒定速率 (CF) 和恒定源 (CS) 模型上应用Plum方法.
分析210Pb活性度和泥炭形状中的散密度变化.

主要成果:

采用Plum方法,经过一些微小的修正,为各种泥炭地类型提供了可靠和准确的时间表.
来自不同210Pb模型的年龄系列在单个泥炭核心中显示出高一致性.
210Pb库存和流量评估表明苏德特地区的-222 (222Rn) 呼气量增加.
在210Pb流量或积累率中没有观察到显著的地理模式.

结论:

梅子法是一种强大的方法,用于高分辨率的泥炭年代,即使在复杂的配置文件中.
210Pb的约会,通过14C和239+240Pu进行验证,为中欧的泥炭地提供了准确的时间表.
增加的222Rn呼气会影响苏德特地区的210Pb沉积,影响流量评估.

关键词:

(210) Pb的流量流量是什么积累率是指积累的速度.在CF/CS模型中,皮特兰德是一个泥炭地.梅花模型的模型.

更多相关视频

Transformation of Organic Household Leftovers into a Peat Substitute

Transformation of Organic Household Leftovers into a Peat Substitute

Published on: July 9, 2019

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

相关概念视频

Radioactive Decay and Radiometric Dating

Radioactive Decay and Radiometric Dating

Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.

Green Algae

Green Algae

Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...

Pozzolans

Pozzolans

Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.