Title: Forests buffer thermal fluctuation better than non-forests
Authors: LIN HUATU CHENGYIFANG JUNYONGGIOLI B.LOUBET B.GRUENING CARSTENZHOU GUOYIBERINGER JASONHUANG JIANGUODUSEK JIRILIDDELL MICHAELBUYSSE PAULINESHI PEILISONG QINGHAIHAN SHIJIEMAGLIULO VINCENZOLI YINGNIANGRACE JOHN
Citation: AGRICULTURAL AND FOREST METEOROLOGY vol. 288-289 p. 107994
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2020
JRC N°: JRC120030
ISSN: 0168-1923 (online)
URI: https://publications.jrc.ec.europa.eu/repository/handle/JRC120030
DOI: 10.1016/j.agrformet.2020.107994
Type: Articles in periodicals and books
Abstract: With the increase in intensity and frequency of extreme climate events, interactions between vegetation and local climate are gaining more and more attention. Both the mean temperature and the temperature fluctuations of vegetation will exert thermal influence on local climate and the life of plants and animals. Many studies have focused on the pattern in the mean canopy surface temperature of vegetation, whereas there is still no systematic study of thermal buffer ability (TBA) of different vegetation types across global biomes. We developed a new method to measure TBA based on the rate of temperature increase, requiring only one radiometer. With this method, we compared TBA of ten vegetation types with contrasting structures, e.g. from grasslands to forests, using data from 133 sites globally. TBA ranged from 5.2 to 21.2 across these sites and biomes. Forests and wetlands buffer thermal fluctuation better than non-forests (grasslands, savannas, and croplands), and the TBA boundary between forests and non-forests was typically around 10. Notably, seriously disturbed and young planted forests displayed a greatly reduced TBA as low as that of non-forests at high latitudes. Canopy height was a primary controller of TBA of forests, while the TBA of grasslands and savannas were mainly determined by energy partition, water availability, and carbon sequestration rates. Our research suggests that both mean values and fluctuations in canopy surface temperature should be considered to predict the risk for plants under extreme events. Protecting mature forests, both at high and low latitudes, is critical to mitigate thermal fluctuation under extreme events.
JRC Directorate:Energy, Transport and Climate

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