Xue et al. (2026) Characterization of aridity-humidity in farming-pastoral ecotone in Northern China from 1965 to 2020 based on SPEI

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Identification

• Journal: DOAJ (DOAJ: Directory of Open Access Journals)
• Year: 2026
• Date: 2026-08-01
• Authors: Li Xue, Shen Yanjun, PEI Hongwei
• DOI: None

Research Groups

Not specified in the provided text.

Short Summary

This study analyzed moisture evolution patterns in Northern China's farming-pastoral ecotone from 1965-2020, revealing a progressive humidification trend that supports vegetation enhancement, while also identifying specific seasonal and spatial drought risks.

Objective

• To reveal the patterns of moisture evolution in the farming-pastoral ecotone in Northern China (FPENC) to further optimize regional water resource development and utilization.

Study Configuration

• Spatial Scale: Farming-pastoral ecotone in Northern China (FPENC).
• Temporal Scale: 1965 to 2020 (56 years).

Methodology and Data

• Models used: Penman-Monteith equation (for potential evapotranspiration), Standardized Precipitation Evapotranspiration Index (SPEI). Analytical techniques: linear trend analysis (regression), Mann-Kendall statistical trend assessment, wavelet transform.
• Data sources: Daily meteorological records from 48 stations in the FPENC.

Main Results

• Annual precipitation in the FPENC showed an increasing trend of 0.71 mm/a.
• Annual mean temperature significantly increased by 0.04 ℃/a.
• Spatially, annual mean temperatures exhibited a west-east gradient (warmer west, cooler east), and precipitation generally increased from north to south.
• SPEI showed a significant increasing trend at the annual scale, as well as in spring, autumn, and winter, indicating a humidification trend, with a non-significant increase in summer.
• The first, second, and third main cycles of SPEI change were 57 years, 44 years, and 9 years, respectively.
• Droughts at all time scales were predominantly light and medium, with low frequencies of severe and extreme droughts.
• The spatial distribution of droughts was seasonal: spring droughts occurred in the western part, summer droughts were concentrated in the southeastern part, autumn and winter droughts frequently occurred in the central-western areas, and annual droughts occurred more frequently in the eastern part of the FPENC.

Contributions

• Provides a comprehensive analysis of moisture evolution patterns in the farming-pastoral ecotone in Northern China over a 56-year period.
• Offers insights for optimizing regional water resource development and utilization strategies.
• Highlights the progressive moistening trend and its positive implications for vegetation enhancement, while also identifying specific seasonal and spatial drought vulnerabilities.

Funding

Not specified in the provided text.

Citation

@article{Xue2026Characterization,
  author = {Xue, Li and Yanjun, Shen and Hongwei, PEI},
  title = {Characterization of aridity-humidity in farming-pastoral ecotone in Northern China from 1965 to 2020 based on SPEI},
  journal = {DOAJ (DOAJ: Directory of Open Access Journals)},
  year = {2026},
  url = {https://openalex.org/W7213963665}
}