A Novel Crossed Hysteresis Response Pattern of Sap Flux to Solar Radiation DOI

Liuliu Wan,

Quan Zhang, M. Altaf Arain

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(7)

Published: July 1, 2024

Abstract The hysteresis response of tree sap flux (SF) to its main driving factor incoming short‐wave radiation (Rsi) has been widely reported, affecting the accuracy and transpiration estimates in forest ecosystems. diurnal cycle SF usually lags Rsi by certain hours, thereby generating a closed counterclockwise pattern. However, few studies have reported that may advance cycle, such pattern not fully explored. In this study, we rarely seen crossed 1/3 trees young temperate pine forest. We found advances especially morning induced early stomatal closure, Rsi. also proposed method quantify magnitude (A hys ) for both hystereses. Our analysis suggests lower A two time series results (a) larger crossing degree hysteresis, (b) stronger linear correlation between series. seasonal variation soil water content can explain Rsi, is more likely occur under stress conditions. This study contributes advancing our understanding how forests respond drought stress, which are expected become frequent longer future climate change.

Language: Английский

A Novel Crossed Hysteresis Response Pattern of Sap Flux to Solar Radiation DOI

Liuliu Wan,

Quan Zhang, M. Altaf Arain

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(7)

Published: July 1, 2024

Abstract The hysteresis response of tree sap flux (SF) to its main driving factor incoming short‐wave radiation (Rsi) has been widely reported, affecting the accuracy and transpiration estimates in forest ecosystems. diurnal cycle SF usually lags Rsi by certain hours, thereby generating a closed counterclockwise pattern. However, few studies have reported that may advance cycle, such pattern not fully explored. In this study, we rarely seen crossed 1/3 trees young temperate pine forest. We found advances especially morning induced early stomatal closure, Rsi. also proposed method quantify magnitude (A hys ) for both hystereses. Our analysis suggests lower A two time series results (a) larger crossing degree hysteresis, (b) stronger linear correlation between series. seasonal variation soil water content can explain Rsi, is more likely occur under stress conditions. This study contributes advancing our understanding how forests respond drought stress, which are expected become frequent longer future climate change.

Language: Английский

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