Decadal radon cycles in a hot spring.
Decadal radon cycles in a hot spring.
复制标题
温泉中的十年氡气循环
DOI：
10.1038/s41598-017-12441-0
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发表时间：
2017-09-21
影响因子：
4.6
通讯作者：
Wang G
中科院分区：
文献类型：
--
作者：
Yan R;Woith H;Wang R;Wang G
本文利用中国西南部邦腊掌温泉水氡近40年的高保真记录，研究了水氡的多年周期性。辅助观测数据，即，水温、泉水流量、气压、区域降雨量、银河宇宙射线（GCR通量受太阳风调制，因此是太阳活动的替代物）和同期的区域地震活动被认为是确定控制氡变化的潜在影响因素。利用连续小波功率谱（WPS）、小波相干（WTC）和部分小波相干（PWC）研究了氡浓度和辅助观测数据的变化。结果表明，氡浓度的长周期变化具有准十年（8-11年）的周期特征，与水温、泉流量和GCR的同期变化周期相吻合。水氡、流量和水温的PWCs表明，水温的变化解释了大部分的氡和流量的相干变化。我们初步得出结论，氡的变化主要是由水温和泉水流量的变化，这是修改和调制的地震和准年代际变化的一个不明的过程。讨论了太阳活动对年代际周期的影响。
A high-fidelity record covering nearly 40 years of water-dissolved radon from the hot spring site of BangLazhang (BLZ), Southwestern China is presented to study multi-year periodicities of radon. Ancillary observational data, i.e., water temperature, spring discharge rate, barometric pressure, combined with regional rainfall, galactic cosmic rays (GCR flux is modulated by solar wind and thus a proxy for solar activity) and regional seismicity from the same period are considered to identify potentially influencing factors controlling the changes in radon. Variations in radon concentration and ancillary observational data are studied using continuous Wavelet Power Spectrum (WPS), Wavelet Coherence (WTC), and Partial Wavelet Coherence (PWC). The results show that the long-period radon concentration is characterized by a quasi-decadal (8–11 years) cycle, matching well with the concurrent periodicity in water temperature, spring discharge rates and GCR. PWCs of radon, discharge rate and water temperature suggest that water temperature variations explain most of the coherent variability of radon and the discharge rate. We tentatively conclude that radon variations are mainly explained by variations in water temperature and spring discharge, which are modified and modulated by earthquakes and quasi-decadal variations of an unidentified process. The influence of solar activity on the decadal periodicity is discussed.
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影响因子：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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