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Soil thermal dynamics of terrestrial ecosystems of the conterminous United States from 1948 to 2008: an analysis with a process-based soil physical model and AmeriFlux data

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  • Guangcun Hao
  • Qianlai Zhuang
  • Jianjun Pan
  • Zhenong Jin
  • Xudong Zhu
  • Shaoqing Liu

Abstract

The spatiotemporal distribution characteristics of soil temperature are a significant, but seldom described signal of climate warming. This study examines the spatiotemporal trends in soil temperature at depths of 10, 20, and 50 cm in the conterminous US during 1948–2008. We find a warming trend of between 0.2 and 0.4 °C at all depths from 1948 to 2008. The lowest soil temperatures are in Colorado and the area where Wyoming, Idaho, and Montana meet. The coastal areas, such as Texas, Florida, and California, experienced the highest soil temperature. In addition, areas that experienced weak cooling in summer soil temperature include Texas, Oklahoma, and Arkansas. Warming was recorded in Arizona, Nevada, and Oregon. In winter, Mississippi, Alabama, and Georgia show a cooling trend, and Montana, North Dakota, and South Dakota have been warming over the 61-year period. Additionally, mix-forest areas experience slightly cooler soil temperature in comparison with air temperature. Shrubland areas experience slightly warmer soil temperature in comparison with air temperature. This study is among the first to analyze the spatiotemporal distribution characteristics of soil temperature in the conterminous US by using multiple site observational data. Improved understanding of the spatially complex responses of soil temperature shall have significant implications for future studies in climate change over the region. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • Guangcun Hao & Qianlai Zhuang & Jianjun Pan & Zhenong Jin & Xudong Zhu & Shaoqing Liu, 2014. "Soil thermal dynamics of terrestrial ecosystems of the conterminous United States from 1948 to 2008: an analysis with a process-based soil physical model and AmeriFlux data," Climatic Change, Springer, vol. 126(1), pages 135-150, September.
    • Handle: RePEc:spr:climat:v:126:y:2014:i:1:p:135-150
    DOI: 10.1007/s10584-014-1196-y
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    References listed on IDEAS

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    1. Jinyun Tang & Qianlai Zhuang, 2011. "Modeling soil thermal and hydrological dynamics and changes of growing season in Alaskan terrestrial ecosystems," Climatic Change, Springer, vol. 107(3), pages 481-510, August.
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    Cited by:

    1. Guangcun Hao & Qianlai Zhuang & Qing Zhu & Yujie He & Zhenong Jin & Weijun Shen, 2015. "Quantifying microbial ecophysiological effects on the carbon fluxes of forest ecosystems over the conterminous United States," Climatic Change, Springer, vol. 133(4), pages 695-708, December.

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