Jinbo Du, Sifan Gu, Zhengyu Liu, Lingwei Li, Ning Zhao
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引用次数: 0
Abstract
This paper introduces the Benthic minus-weighted-Planktonic (BwP) age method to estimate the pure water age of the deep ocean. It combines radiocarbon data with water mass composition evolution in an ocean model under realistic surface forcings accounting for multiple water sources, marine reservoir age, and the evolving atmospheric \({14\atop}C\) content. Instead of using local planktonic radiocarbon age, the source water radiocarbon age is derived from global planktonic data weighted by their water mass contributions, with weights simulated by dye tracers. An iterative approach is used to account for the effect of the temporal variation of the atmospheric radiocarbon or the so-called projection age issue. In this ocean model, we demonstrate that our BwP age effectively reproduces the pure water age that results from the interior ocean circulation. Preliminary application to the North Pacific suggests that the pure water age at the Last Glacial Maximum (LGM) is not much older than today.
期刊介绍：
npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols.
The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.
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