Forests buffer thermal fluctuation better than non-forests

Lin, Hua, Tu, Chengyi, Fang, Junyong, Gioli, Beniamino, Loubet, Benjamin, Gruening, Carsten, Zhou, Guoyi, Beringer, Jason, Huang, Jianguo, Dusek, Jiri, Liddell, Michael, Buysse, Pauline, Shi, Peili, Song, Qinghai, Han, Shijie, Magliulo, Vincenzo, Li, Yingnian, and Grace, John (2020) Forests buffer thermal fluctuation better than non-forests. Agricultural and Forest Meteorology, 288-289. 107994.

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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.

Item ID: 63587
Item Type: Article (Research - C1)
ISSN: 1873-2240
Keywords: Deforestation, Global warming, Extreme temperature, Temperature mitigation, Thermal effects, Vegetation index
Copyright Information: © 2020 Elsevier B.V.
Funders: National Natural Science Foundation of China, CAS 135 Program, Open Fund of State Key Laboratory of Remote Sensing Science, Open Fund of Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences
Projects and Grants: National Natural Science Foundation of China 31870386, CAS 135 Program 2017XTBG-F01, Open Fund of State Key Laboratory of Remote Sensing Science OFSLRSS201805, Open Fund of Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences 09KF001B04, National Natural Science Foundation of China (NSCF-TRF project, grant number 4186114401
Date Deposited: 24 Jun 2020 07:51
FoR Codes: 37 EARTH SCIENCES > 3701 Atmospheric sciences > 370199 Atmospheric sciences not elsewhere classified @ 50%
37 EARTH SCIENCES > 3702 Climate change science > 370299 Climate change science not elsewhere classified @ 50%
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