Regional Atmospheric CO[sub.2] Response to Ecosystem CO[sub.2] Budgets in China

• Published in: Remote sensing (Basel, Switzerland) Vol. 15; no. 13
• Main Authors: Li, Haixiao, Lian, Yi, Renyang, Qianqian, Liu, Le, Qu, Zihan, Lee, Lien-Chieh
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.06.2023
• Subjects: Air quality management; Ecosystems; Emissions (Pollution); Global warming; China
• ISSN: 2072-4292; 2072-4292
• DOI: 10.3390/rs15133320

The distribution of atmospheric CO[sub.2] is not homogenous, primarily due to variations in the CO[sub.2] budgets of regional terrestrial ecosystems. To formulate a comprehensive strategy to combat the increasing global CO[sub.2] levels and associated warming, it is crucial to consider both the distribution of atmospheric CO[sub.2] and the CO[sub.2] budgets of ecosystems. This study focused on analyzing the relationship between regional atmospheric CO[sub.2] and CO[sub.2] budgets in China from 2010 to 2017. Initially, a robust estimation model of net ecosystem CO[sub.2] exchange was developed to calculate CO[sub.2] budgets using collected emission data. Subsequently, Pearson correlation, redundancy analysis, and geographically weighted regression techniques were employed to examine the link between atmospheric CO[sub.2] levels, CO[sub.2] budgets, and other meteorological factors at various spatial and temporal scales. The findings from the redundancy analysis and geographically weighted regression indicated that the atmospheric CO[sub.2] content of each province could not be solely determined by the regional CO[sub.2] budgets. However, a significant and positive correlation between atmospheric CO[sub.2] levels and CO[sub.2] budgets was observed in non-coastal provinces for a period of six months (R[sup.2] ranging from 0.46 to 0.83). Consequently, it is essential to promote a balance between CO[sub.2] emissions and the CO[sub.2] uptake capacity of regional ecosystems. This balance would minimize positive CO[sub.2] budgets and effectively mitigate the increase in atmospheric CO[sub.2] levels.