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Long-term changes in observed soil temperature over Poyang Lake Basin, China, during 1960–2016

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A Correction to this article was published on 22 July 2023

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Abstract

A regional analysis of soil temperature (ST) is essential for improving our understanding of the soil thermal regime and its link with the atmosphere. This study attempts to assess trends in the Poyang Lake Basin (PLB) ST magnitude during 1960–2016 from station observations at multiple depths. The Mann–Kendall, Thiel-Sen, linear regression, and probability density statistics (PDF) are used for ST trend assessment with a significance level of 95%. The ST seasonal variability shows minimum values in winter (8℃) and maximum in the summer season (32 ℃). On an interannual scale, spring and winter seasons exhibited a significant increase in both land surface temperature (LST) (0.4℃, 0.4℃) and ST (0.3 °C, 0.15℃) magnitude than summer (LST − 0.1℃, ST 0.2℃) and autumn seasons (LST 0.3℃, ST 0.2℃). The northern basin exhibited a significant increase in LST, and ST magnitude, especially during the cold seasons (spring, winter) than the warm seasons. The maximum and minimum temperature trend and their diurnal difference infer an increase in the minimum temperature, especially during the summer, autumn, and winter seasons. The PDF further inferred that extreme cold events’ frequency decreased, and a significant increase in extreme warm events is obvious in the recent decade. The increasing trend in soil temperature magnitude is more in the northern basin than the high-altitude southern basin. Large-scale global warming and regional water and energy cycle changes can be the leading factors of such a warming trend.

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Data availability

The datasets generated during and/or analyzed during the current study are not publicly available due to confidentiality of meteorological observation data but are available from the corresponding author on reasonable request.

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Funding

This study is financially supported by Young Scientific and Technological Talents Promotion Project of Jiangsu Association for Science and Technology (TJ-2021–21) and Jiangsu Meteorological Bureau Scientific Research Project (KM202111).

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Conceptualization, D. L and X. S; methodology, D. L and Y. C; validation D. L, W. U, and H. Z; formal analysis, D. L and W. U; investigation, D. L and W. U; resources, D. S; data curation, C. L and Y. C; writing, D. L and W. U; writing review and editing, D. L, X. S, W. U, and H. Z; visualization, C. L and Y. C; supervision, D. L and X. S; project administration, X. S; funding acquisition, D. S.

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Correspondence to **ao Shi.

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The original online version of this article was revised: Due to the affiliation numbers of the first and second authors are wrong.

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Lou, D., Shi, X., Ullah, W. et al. Long-term changes in observed soil temperature over Poyang Lake Basin, China, during 1960–2016. Theor Appl Climatol 154, 717–731 (2023). https://doi.org/10.1007/s00704-023-04522-0

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  • DOI: https://doi.org/10.1007/s00704-023-04522-0

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