Quantifying the Impact of Vegetation Greening on Evapotranspiration and Its Components on the Tibetan Plateau DOI Creative Commons

Peidong Han,

Hanyu Ren,

Yinghan Zhao

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(10), P. 1658 - 1658

Published: May 8, 2025

The Tibetan Plateau (TP) serves as a vital ecological safeguard and water conservation region in China. In recent decades, substantial efforts have been made to promote vegetation greening across the TP; however, these interventions added complexity local balance evapotranspiration (ET) processes. To investigate dynamics, we apply Priestley–Taylor Jet Propulsion Laboratory (PT-JPL) model simulate ET components TP. Through sensitivity experiments, isolate contribution of variations. Furthermore, analyze role climatic drivers on using suite statistical techniques. Based satellite climate data from 1982 2018, found following: (1) PT-JPL successfully captured trends over TP, revealing increasing total ET, canopy transpiration, interception loss, soil evaporation at rates 0.06, 0.39, 0.005, 0.07 mm/year, respectively. model’s performance was validated eddy covariance observations three flux tower sites, yielding R2 values 0.81–0.86 RMSEs ranging 6.31 13.20 mm/month. (2) Vegetation exerted significant enhancement with mean annual under scenarios (258.6 ± 120.9 mm) being 2.9% greater than non-greening (251.2 157.2 during 1982–2018. (3) Temperature vapor pressure deficit were dominant controls influencing 53.5% 23% region, respectively, identified consistently by both multiple linear regression factor analyses. These findings highlight net influence offer valuable guidance for management sustainable restoration region.

Language: Английский

Vegetation Restoration Outpaces Climate Change in Driving Evapotranspiration in the Wuding River Basin DOI Creative Commons

G. X. Zhang,

Zijun Wang,

Hanyu Ren

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(9), P. 1577 - 1577

Published: April 29, 2025

For the management of water cycle, it is essential to comprehend evapotranspiration (ET) and how changes over time space, especially in relation vegetation. Here, using Priestley–Taylor Jet Propulsion Laboratory (PT-JPL) model, we explored spatiotemporal variations ET across different scales during 1982–2018 Wuding River Basin. We also quantitatively evaluated driving mechanisms climate vegetation on changes. Results showed that estimate by PT-JPL model good agreement (R2 = 0.71–0.84) with four products (PML, MOD16A2, GLASS, FLDAS). Overall, increased significantly at a rate 3.11 mm/year (p < 0.01). Spatially, WRB higher southeast lower northwest. Attribution analysis indicated restoration (leaf area index) was dominant driver (99.93% basin area, p 0.05), exhibiting both direct effects indirect mediation through Vapor Pressure Deficit. Temperature influences emerged predominantly feedbacks rather than climatic forcing. These findings establish as key regional ET, providing empirical support for optimizing revegetation strategies semi-arid environments.

Language: Английский

Citations

0
Quantifying the Impact of Vegetation Greening on Evapotranspiration and Its Components on the Tibetan Plateau DOI Creative Commons

Peidong Han,

Hanyu Ren,

Yinghan Zhao

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(10), P. 1658 - 1658

Published: May 8, 2025

The Tibetan Plateau (TP) serves as a vital ecological safeguard and water conservation region in China. In recent decades, substantial efforts have been made to promote vegetation greening across the TP; however, these interventions added complexity local balance evapotranspiration (ET) processes. To investigate dynamics, we apply Priestley–Taylor Jet Propulsion Laboratory (PT-JPL) model simulate ET components TP. Through sensitivity experiments, isolate contribution of variations. Furthermore, analyze role climatic drivers on using suite statistical techniques. Based satellite climate data from 1982 2018, found following: (1) PT-JPL successfully captured trends over TP, revealing increasing total ET, canopy transpiration, interception loss, soil evaporation at rates 0.06, 0.39, 0.005, 0.07 mm/year, respectively. model’s performance was validated eddy covariance observations three flux tower sites, yielding R2 values 0.81–0.86 RMSEs ranging 6.31 13.20 mm/month. (2) Vegetation exerted significant enhancement with mean annual under scenarios (258.6 ± 120.9 mm) being 2.9% greater than non-greening (251.2 157.2 during 1982–2018. (3) Temperature vapor pressure deficit were dominant controls influencing 53.5% 23% region, respectively, identified consistently by both multiple linear regression factor analyses. These findings highlight net influence offer valuable guidance for management sustainable restoration region.

Language: Английский

Citations

0