Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

IF 2.3 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Yiying Zhu , Hesong Wang , Anzhi Zhang
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引用次数: 0

Abstract

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake; however, frequently occurring climate extremes and human activities have considerably threatened the stability of forests. At the same time, detailed accounts of disturbances and forest responses are not yet well quantified in Asia. This study employed the Breaks For Additive Seasonal and Trend method—an abrupt-change detection method—to analyze the Enhanced Vegetation Index time series in East Asia, South Asia, and Southeast Asia. This approach allowed us to detect forest disturbance and quantify the resilience after disturbance. Results showed that 20 % of forests experienced disturbance with an increasing trend from 2000 to 2022, and Southeast Asian countries were more severely affected by disturbances. Specifically, 95 % of forests had robust resilience and could recover from disturbance within a few decades. The resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance magnitude. In summary, this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two decades. The authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in 2022. The findings of this study underscore the complex relationship between disturbance and resilience, contributing to comprehension of forest resilience through satellite remote sensing.
摘要
目前对于亚洲森林在应对气候变化和人类活动干扰方面的研究相对较少. 本研究利用BFAST突变检测方法, 分析了东亚, 南亚和东南亚的增强植被指数 (EVI) 长时间序列中检测到的森林扰动和恢复情况. 结果显示, 2000年至2022年期间, 约20%的森林经历了扰动, 且受到扰动的森林面积呈增加趋势, 东南亚国家受扰动的影响更为严重. 在扰动事件发生后, 95%的森林具有较好的恢复能力, 能够在受到扰动后的一段时间后恢复过来, 其中约有三分之二的森林在2022年时已经恢复到了较扰动前更好的状态.

Abstract Image

卫星遥感揭示了亚洲森林受干扰后的巨大恢复力
森林生态系统通过增强碳吸收,在减缓人为引起的气候变化方面发挥关键作用;然而,频繁发生的极端气候和人类活动已经严重威胁到森林的稳定性。与此同时,亚洲对干扰和森林反应的详细描述尚未得到很好的量化。本研究采用一种突变检测方法——累加季节和趋势断裂法,对东亚、南亚和东南亚的植被指数增强时间序列进行了分析。这种方法使我们能够检测森林扰动并量化扰动后的恢复力。结果表明:2000 - 2022年,20 %的森林受到干扰,并呈增加趋势,其中东南亚国家受干扰的影响更为严重。具体而言,95% %的森林具有强大的恢复能力,可以在几十年内从干扰中恢复。扰动较大的森林恢复力往往比扰动较小的森林更强。总之,本研究调查了过去二十年来亚洲中低纬度地区森林的恢复力。作者发现,大多数森林在受到干扰后表现出良好的恢复能力,大约三分之二的森林在2022年恢复到更好的状态。本研究的发现强调了干扰与恢复力之间的复杂关系,有助于通过卫星遥感了解森林的恢复力。本研究利用BFAST突变检测方法,分析了东亚,南亚和东南亚的增强植被指数(以)长时间序列中检测到的森林扰动和恢复情况。结果显示, 2000年至2022年期间, 约20%的森林经历了扰动, 且受到扰动的森林面积呈增加趋势, 东南亚国家受扰动的影响更为严重. 在扰动事件发生后, 95%的森林具有较好的恢复能力, 能够在受到扰动后的一段时间后恢复过来, 其中约有三分之二的森林在2022年时已经恢复到了较扰动前更好的状态.
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来源期刊
Atmospheric and Oceanic Science Letters
Atmospheric and Oceanic Science Letters METEOROLOGY & ATMOSPHERIC SCIENCES-
CiteScore
4.20
自引率
8.70%
发文量
925
审稿时长
12 weeks
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