Evaluating tree-ring proxies for representing the ecosystem productivity in India.

IF 3 3区 地球科学 Q2 BIOPHYSICS International Journal of Biometeorology Pub Date : 2024-10-30 DOI:10.1007/s00484-024-02799-y
Aharna Sarkar, Pinaki Das, Sandipan Mukherjee, Pramit Kumar Deb Burman, Supriyo Chakraborty
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Abstract

Terrestrial ecosystems are one of the major sinks of atmospheric CO2 and play a key role in climate change mitigation. Forest ecosystems offset nearly 25% of the global annual CO2 emissions, and a large part of this is stored in the aboveground woody biomass. Several studies have focused on understanding the carbon sequestration processes in forest ecosystems and their response to climate change using the eddy covariance (EC) technique and remotely sensed vegetation indices. However, very few of them address the linkage of tree-ring growth with the ecosystem-atmosphere carbon exchange, and nearly none have tested this linkage over a long-term (> 100 years) - limited by the short-term (< 50 years) availability of measured ecosystem carbon flux. Nevertheless, tree-ring indices can potentially act as proxies for ecosystem productivity. We utilise the Coupled Climate Carbon Cycle Model Intercomparison Project (C4MIP) model outputs for its 140-year-long simulated records of mean monthly gross primary productivity (GPP) and compare them with the tree-ring growth indices over the northwestern Himalayan region in India. In this study, we examine three coniferous tree species: Pinus roxburghii and Picea smithiana wall. Boiss and Cedrus deodara and find that the strength of the correlation between GPP and tree ring growth indices (RWI) varies among the species.

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评估代表印度生态系统生产力的树环代用指标。
陆地生态系统是大气二氧化碳的主要吸收汇之一,在减缓气候变化方面发挥着关键作用。森林生态系统抵消了全球每年近 25% 的二氧化碳排放量,其中很大一部分储存在地上木质生物量中。一些研究利用涡度协方差(EC)技术和遥感植被指数,重点了解森林生态系统的碳封存过程及其对气候变化的响应。然而,其中很少有研究涉及树环生长与生态系统-大气碳交换的联系,几乎没有研究对这种联系进行长期(> 100 年)的测试--这受到短期(> 100 年)的限制。
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来源期刊
CiteScore
6.40
自引率
9.40%
发文量
183
审稿时长
1 months
期刊介绍: The Journal publishes original research papers, review articles and short communications on studies examining the interactions between living organisms and factors of the natural and artificial atmospheric environment. Living organisms extend from single cell organisms, to plants and animals, including humans. The atmospheric environment includes climate and weather, electromagnetic radiation, and chemical and biological pollutants. The journal embraces basic and applied research and practical aspects such as living conditions, agriculture, forestry, and health. The journal is published for the International Society of Biometeorology, and most membership categories include a subscription to the Journal.
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