气候变化领域集成服务门户(CCPortal): Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests

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DOI	10.1029/2023JG007848
	Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests
	Zhu, Qingsong; Chen, Jiquan; Charles P.-a., Bourque; Sonnentag, Oliver; Montagnani, Leonardo; O'Halloran, Thomas L.; Scott, Russell L.; Forsythe, Jeremy; Song, Bo; Zou, Huimin; Duan, Meihui; Li, Xianglan
发表日期	2024
ISSN	2169-8953
EISSN	2169-8961
起始页码	129
结束页码	3
卷号	129 期号:3
英文摘要	Forest disturbances can result in very different canopies that carry elevated albedo, thus causing substantial cooling effects on the climate. Unfortunately, the resulting dynamic global warming potential from altered albedo (GWP Delta alpha) is poorly understood. We examined and modeled the changes in albedo over time after disturbances (i.e., forest age) by forest type, disturbance type and geographic location using direct measurements from 107 sites in temperate and boreal regions. Albedo in undisturbed forests was used as the reference to calculate albedo changes (Delta alpha) and GWP Delta alpha after a disturbance. We found that age is a significant factor for predicting albedo amid the obvious regulations from forest type and geographic locations. We found the strongest cooling GWP Delta alpha in the first 10 years after a disturbance, but it decreased rapidly with time. The changes in GWP Delta alpha were very different from the chronosequence of net ecosystem production (NEP). In the first decade after disturbances, GWP Delta alpha was negative (i.e., cooling) and surprisingly larger in magnitude, with an average of -0.609 kg CO2 m-2 yr-1, compared to NEP of -0.166 kg CO2 m-2 yr-1. Albedo continued to decrease and approached pre-disturbance levels until around 50 years, resulting in a nearly zero GWP Delta alpha. This research illustrates that many forests in temperate and boreal regions can be considered significant cooling agents by taking into account the high albedo of young forests following disturbances. After forest disturbances, the removal of dense canopies exposes brighter surfaces, leading to higher surface albedo. Changes in albedo, which affect the reflection of solar energy from the Earth's surface, can have different climate impacts of greenhouse gases emissions like CO2. In this study, we used in situ observations to model how albedo changes over time following forest disturbances. We also assessed the climate impacts of these albedo changes, taking into account their temporal dynamics. Our results show that the age of the forest is the most significant factor influencing albedo dynamics after disturbances. However, the trajectory of albedo dynamics also depends on the forest types and disturbance types. We found that the elevated albedo in forests after disturbances accounts for substantial cooling effects in the first 20 years that is comparable to the effect of net ecosystem production (NEP). Understanding the dynamic of albedo following forest disturbances is essential for quantifying the climate impacts, especially as more forests are experiencing disturbances induced by human activities. Age, forest type, and disturbance type significantly influence post-disturbance albedo dynamics, with age having the most substantial impact Elevated albedo in forests after disturbances exerts a dominant cooling effect within the first 20 years of succession Quantifying the climate impact of changing albedo post-disturbance should consider the successional trajectory, as its effects are highly time-sensitive
英文关键词	albedo; forest disturbance; chronosequence; NEP; GWP
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:001183520100001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306653
作者单位	Beijing Normal University; Beijing Normal University; Michigan State University; University of New Brunswick; Universite de Montreal; Free University of Bozen-Bolzano; Clemson University; Clemson University; United States Department of Agriculture (USDA)
推荐引用方式 GB/T 7714	Zhu, Qingsong,Chen, Jiquan,Charles P.-a., Bourque,et al. Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests[J],2024,129(3).
APA	Zhu, Qingsong.,Chen, Jiquan.,Charles P.-a., Bourque.,Sonnentag, Oliver.,Montagnani, Leonardo.,...&Li, Xianglan.(2024).Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,129(3).
MLA	Zhu, Qingsong,et al."Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 129.3(2024).