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Longer Growing Seasons Cause Hydrological Regime Shifts in Central European Forests

Kupec, Petr and Deutscher, Jan and Futter, Martyn (2021). Longer Growing Seasons Cause Hydrological Regime Shifts in Central European Forests. Forests. 12 , 1656
[Research article]

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Abstract

In this study, we present evidence for a hydrological regime shift in upland central European forests. Using a combination of long-term data, detailed field measurements and modelling, we show that there is a prolonged and persistent decline in annual runoff:precipitation ratios that is most likely linked to longer growing seasons. We performed a long term (1950-2018) water balance simulation for a Czech upland forest headwater catchment calibrated against measured streamflow and transpiration from deciduous and coniferous stands. Simulations were corroborated by long-term (1965-2018) borehole measurements and historical drought reports. A regime shift from positive to negative catchment water balances likely occurred in the early part of this century. Since 2007, annual runoff:precipitation ratios have been below the long-term average. Annual average temperatures have increased, but there have been no notable long term trends in precipitation. Since 1980, there has been a pronounced April warming, likely leading to earlier leaf out and higher annual transpiration, making water unavailable for runoff generation and/or soil moisture recharge. Our results suggest a regime shift due to second order effects of climate change where increased transpiration associated with a longer growing season leads to a shift from light to water limitation in central European forests. This will require new approaches to managing forests where water limitation has previously not been a problem.

Authors/Creators:Kupec, Petr and Deutscher, Jan and Futter, Martyn
Title:Longer Growing Seasons Cause Hydrological Regime Shifts in Central European Forests
Series Name/Journal:Forests
Year of publishing :2021
Volume:12
Article number:1656
Number of Pages:18
Publisher:MDPI
ISSN:1999-4907
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
Keywords:forest hydrology, tipping point, water balance modelling
URN:NBN:urn:nbn:se:slu:epsilon-p-115719
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115719
Additional ID:
Type of IDID
DOI10.3390/f12121656
Web of Science (WoS)000738105900001
ID Code:26815
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:24 Jan 2022 14:25
Metadata Last Modified:24 Jan 2022 14:31

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