Preprints
https://doi.org/10.5194/bg-2021-127
https://doi.org/10.5194/bg-2021-127

  02 Jun 2021

02 Jun 2021

Review status: a revised version of this preprint is currently under review for the journal BG.

Difference of SPAC composition and control factors of different vegetation zones in north slope of Qilian Mountains

Yuwei Liu1,2, Guofeng Zhu1,2, Zhuanxia Zhang1,2, Zhigang Sun1,2, Leilei Yong1,2, Liyuan Sang1,2, Lei Wang1,2, and Kailiang Zhao1,2 Yuwei Liu et al.
  • 1School of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, Gansu, China
  • 2Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China

Abstract. Understanding the differences and controlling factors of stable water isotopes in the soil-plant-atmosphere continuum of different vegetation zones has important guiding significance for revealing the hydrological processes and regional water cycle mechanisms.This study selected three different vegetation zones (alpine meadows, forests, and arid piedmont zones) in the Shiyang River Basin for study. This paper’s analysis results show that: (1) In SPAC, precipitation isotope has the main controlling effect. From alpine meadows to arid foothills, as the altitude decreases, the temperature effect of precipitation isotopes increases. (2) From the alpine meadow to the arid foothills, the soil water isotope is gradually enriched, indicating that the evaporation is gradually increasing. (3) Alpine meadow plants are mainly supplied by precipitation in the rainy season; forest plants mainly utilize soil water in the dry season and precipitation in the rainy season. The soil water in the arid mountain foothills is mainly recharged by groundwater, and the evaporation and fractionation of plant isotopes are very strong.This research will help understand the SPAC system’s water cycle at different altitudes and climates on high mountains.

Yuwei Liu et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2021-127', Anonymous Referee #1, 17 Jun 2021
  • RC2: 'Comment on bg-2021-127', Anonymous Referee #2, 13 Jul 2021

Yuwei Liu et al.

Yuwei Liu et al.

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Short summary
We took the water cycle process of soil-plant-atmospheric precipitation as the research objective. In the water cycle of soil-plant-atmospheric precipitation, precipitation is the main controlling role. The main source of replenishment for alpine meadow plants is precipitation and alpine meltwater, the main source of replenishment for forest plants is soil water, and the plants in the arid foothills mainly use groundwater.
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