Quantifying the Effects of Wind Turbulence on CO2 Flux Measurement in a Closed Chamber DOI Open Access
Zhiwei Wu, Junguo Hu,

Lingxia Feng

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10501 - 10501

Published: Nov. 29, 2024

This study aimed to investigate the effects of wind turbulence on CO2 transport within a medium and extent measurement errors in closed chamber. Therefore, laboratory with controllable environmental conditions, performance chamber at various speeds was assessed using soil respiration calibration apparatus four types porous media. The experimental results indicated that under influence exhibited varying degrees underestimation, ranging from −51 −6%. were more pronounced sandy soils. As enhanced gas medium, flux measurements biased, this phenomenon closely related medium’s particle size surface speed. To address issue, it is recommended conduct long-term monitoring eliminate by averaging repeated measurements, which will improve accuracy ecosystem carbon budget.

Language: Английский

Uncertainty in soil gas permeability measurements DOI Creative Commons

Lingxia Feng,

Junguo Hu, Junjie Jiang

et al.

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 13

Published: Jan. 23, 2025

Introduction Soil gas permeability is critical to the study of soil pore structure, transport, and crop growth. Methods In this paper, a pressure decay method proposed calculate based on law conservation mass, which measured compared with steady-state in variety soils, including compacted soils different moisture contents. The applicability two methods effects compaction water content were explored. Results experimental results show that low-permeability there bias values method. contrast, calculated are more accurate. Increasing or compacting 20%–88% 63%–93% decrease permeability, respectively, degree correlating viscosity medium. Discussion findings calculating helps compensate for inaccuracy measuring soils. This leads better evaluation aeration conditions, which, turn, serves environmental, agricultural, ecological research.

Language: Английский

Citations

0
Effects of environmental changes on soil respiration in arid, cold, temperate, and tropical zones DOI
Mbezele Junior Yannick Ngaba, Yves Uwiragiye, Bin Hu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 952, P. 175943 - 175943

Published: Aug. 31, 2024

Language: Английский

Citations

1
Global Spatial Projections of Forest Soil Respiration and Associated Uncertainties DOI Open Access

Lingxia Feng,

Junjie Jiang, Junguo Hu

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(11), P. 1982 - 1982

Published: Nov. 10, 2024

The accurate prediction of global forest soil respiration (Rs) is critical for climate change research. Rs consists autotrophic (Ra) and heterotrophic (Rh) respiration, which respond differently to environmental factors. Predicting as a single flux can be biased; therefore, Ra Rh should predicted separately improve accuracy. In this study, we used the SRDB_V5 database random model analyze uncertainty in predicting using (SGM) Ra/Rh specific categorical (SCM) spatial dynamics distribution pattern Ra, Rh, future under two different patterns. results show that higher tropical inland climatic conditions, while fluctuates less than Rs. addition, SCM predictions better capture key factors are more consistent with actual data. SSP585 (high emissions) scenario, projected increase by 19.59 percent, SSP126 (low increases only 3.76 percent over 80 years, underlines need projections.

Language: Английский

Citations

1
Quantifying the Effects of Wind Turbulence on CO2 Flux Measurement in a Closed Chamber DOI Open Access
Zhiwei Wu, Junguo Hu,

Lingxia Feng

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10501 - 10501

Published: Nov. 29, 2024

This study aimed to investigate the effects of wind turbulence on CO2 transport within a medium and extent measurement errors in closed chamber. Therefore, laboratory with controllable environmental conditions, performance chamber at various speeds was assessed using soil respiration calibration apparatus four types porous media. The experimental results indicated that under influence exhibited varying degrees underestimation, ranging from −51 −6%. were more pronounced sandy soils. As enhanced gas medium, flux measurements biased, this phenomenon closely related medium’s particle size surface speed. To address issue, it is recommended conduct long-term monitoring eliminate by averaging repeated measurements, which will improve accuracy ecosystem carbon budget.

Language: Английский

Citations

0