Inventory of China’s Net Biome Productivity since the 21st Century

Abstract

Net biome productivity (NBP), which takes into account abiotic respiration and metabolic processes such as fire, pests, and harvesting of agricultural and forestry products, may be more scientific than net ecosystem productivity (NEP) in measuring ecosystem carbon sink levels. As one of the largest countries in global carbon emissions, in China, however, the spatial pattern and evolution of its NBP are still unclear. To this end, we estimated the magnitude of NBP in 31 Chinese provinces (except Hong Kong, Macau, and Taiwan) from 2000 to 2018, and clarified its temporal and spatial evolution. The results show that: (1) the total amount of NBP in China was about 0.21 Pg C/yr1. Among them, Yunnan Province had the highest NBP (0.09 Pg C/yr1), accounting for about 43% of China’s total. (2) NBP increased from a rate of 0.19 Tg C/yr1 during the study period. (3) At present, NBP in China’s terrestrial ecosystems is mainly distributed in southwest and south China, while northwest and central China are weak carbon sinks or carbon sources. (4) The relative contribution rates of carbon emission fluxes due to emissions from anthropogenic disturbances (harvest of agricultural and forestry products) and natural disturbances (fires, pests, etc.) were 70% and 9.87%, respectively. This study emphasizes the importance of using NBP to re-estimate the net carbon sink of China’s terrestrial ecosystem, which is beneficial to providing data support for the realization of China’s carbon neutrality goal and global carbon cycle research.

Accelerating the Improvement of Human Well-Being in China through Economic Growth and Policy Adjustment

“…Financial transfer investment rose from 29% in 1999 to 39.4% in 2010, marking an increase of 35.86% in the past decade. Driven by various development strategies and policies, China's infrastructure construction and ecological protection have been greatly improved [60][61][62][63][64][65][66][67][68][69][70][71][72]. Since 1995, China's economic investment has increased by 13.87 times in non-defensive public expenses on education and health, 35.02 times in the value of highways and streets, and 6.65 times in net capital growth.…”

Carbon Neutrality Goal Is Too Far Away? Residents’ Psychological Distance of Low-Carbon Policy Over Time and Space in China

“…Southwest China accounts for approximately 32% of the CO2 uptake of mainland China (Wang et al, 2020). Southwest China is the largest carbon sink region in the country (Du et al,2022;Piao et al, 2009). Therefore, it should receive more CO2 quotas (Yang et al, 2022).…”

The Spatial and Temporal Evolution Pattern and Transformation of Urban–Rural Construction Land in Karst Mountainous Areas: Qixingguan District of Guizhou, Southwest China

“…Based on the limited availability and accessibility of data in this study, the selection of driving indicators of urban-rural construction land transformation needs to be further improved, and in the selection of indicators, the categories can be further increased, such as forest cover [59], technological progress, food security [60], karst basin water re-sources [61], etc., to clarify the mechanism of the driving factors of urban-rural construction land transformation more clearly. (4) Research results on carbon peaking and carbon neutralization surge since the double carbon target was proposed [62,63], the carbon emissions of urban-rural construction have attracted more attention [64]. In order to optimize carbon neutrality in new urbanization construction, more studies should be conducted that combine the processes of carbon emission reduction and carbon trading, relying on this huge carbon sink [65] to achieve the goal of carbon neutrality [66].…”