标题: A Method for Reconstructing the Past Soil Temperature Based on Tree-Ring Widths
作者: Yuan, S (Yuan, Shuai); Zheng, YH (Zheng, Yonghong); Qi, YD (Qi, Yongdong); Kong, FX (Kong, Fanxi); Wang, D (Wang, Dan); Zhang, FF (Zhang, Fangfang)
来源出版物: FOREST SCIENCE 卷: 66 期: 4 页: 393-402 DOI: 10.1093/forsci/fxaa001 出版年: AUG 2020
摘要: Soil temperature can affect tree growth and is one of the most important types of basic data for forest cultivation and management. To obtain a long-term time series of soil temperatures, we explored the utility of dendroclimatology in a subtropical area of China. In this study, the relations between tree-ring-width chronologies and climate factors were explored by correlation analysis. The results indicated that the limiting climatic factors for the radial growth of Huangshan pine were elevation-specific. Further investigation found that chronology at high elevations was significantly correlated with soil temperature. Then, we described a reconstruction of the soil temperatures of the Dabie Mountains area using the tree-ring width chronology from 1869 to 2015 and showed that the reconstruction explained 42.9 percent of the instrumental soil temperature variation in the common years. We found that the 1970s and 2000s were the coldest and warmest decades since 1884, respectively. The results of the reconstruction method for describing past soil temperatures can provide a reference for other subtropical forests. Furthermore, the results of our research also have a certain significance for guiding policymaking related to forest cultivation and management.
Study Implications: Soil temperature, which affects the chemical and biological processes of carbon and nitrogen in the soil, thus affecting plant growth, seed germination, and crop yield, is an important soil physical property. However, the lack of long-term instrumental records of soil temperature limits the understanding of most below-ground ecosystem processes. Tree-ring width, which is one of the most important proxies in the study of past air temperatures and precipitation changes, potentially provides a way to understand the changes in soil temperature in the past. This study explored the applicability of tree-ring samples from different elevations to the reconstruction of soil temperatures, and the applicability was found to be elevation-specific. The tree rings sampled from high elevations can be used to reconstruct soil temperature, whereas those sampled from other elevations cannot be used to do so. In the winter and spring, the soil temperature is the main limiting factor for high-elevation tree growth and increasing soil temperature promotes tree growth. In the process of forest cultivation, forest managers should consider changes in not only air temperature but also soil temperature. Consequently, measures should be taken to increase soil temperature to mitigate the threats of low soil temperature.
作者关键词: Dabie Mountains; subtropical China; Huangshan pine; elevation-specific; soil temperature
地址: [Yuan, Shuai; Zheng, Yonghong; Qi, Yongdong; Kong, Fanxi; Wang, Dan] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
[Zhang, Fangfang] Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China.
通讯作者地址: Yuan, S (corresponding author)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
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