Speleothem evidence of solar modulation on the south Asia monsoon intensity

IF 8.5 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2025-03-15 DOI:10.1038/s41612-025-00971-8

Hong-Wei Chiang, Yue-Gau Chen, Shih-Yu Lee, Dung Chi Nguyen, Chuan-Chou Shen, Yin Lin, Lam Dinh Doan

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Abstract

The influence of solar variation on climate has long been debated. Here, we utilize a decadal-resolved speleothem δ¹⁸O record from Vietnam, spanning 32.5 to 27.5 kyr BP, as a proxy for regional precipitation levels. Our results show a general coherence between Total Solar Irradiance (TSI) and regional precipitation, supporting a positive climate response consistent with conventional monsoon theory. Spectral analysis on studied datasets reveals an approximately 180-year periodicity coinciding with the de Vries cycle of solar activity. Further comparing our record with 35 other speleothem records, we demonstrate the importance of sufficient age control points in capturing solar-related periodicities. Model simulation shows that TSI could enhance monsoonal circulation and regional precipitation. Also highlighted are the implications of chronology control for detecting climate events in proxy records. The new findings underscore the significance of relatively minor radiative forcing in regional climate dynamics over monsoonal Asia on decadal to centennial timescales.

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南亚季风强度受太阳调节的岩溶证据

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

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.