The fusion of multiple scale data indicates that the carbon sink function of the Qinghai-Tibet Plateau is substantial,Carbon Balance and Management

当前位置： X-MOL 学术 › Carbon Balance Manag. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

The fusion of multiple scale data indicates that the carbon sink function of the Qinghai-Tibet Plateau is substantial
Carbon Balance and Management ( IF 3.8 ) Pub Date : 2023-09-11 , DOI: 10.1186/s13021-023-00239-9
Jingyu Zeng _{1,

2} , Tao Zhou _{1,

2} , Yixin Xu _{1,

2} , Qiaoyu Lin _{1,

2} , E Tan _{1,

2} , Yajie Zhang _{1,

2} , Xuemei Wu _{1,

2} , Jingzhou Zhang _{1,

2} , Xia Liu _{1,

2}

Affiliation

The Qinghai-Tibet Plateau is the “sensitive area” of climate change, and also the “driver” and “amplifier” of global change. The response and feedback of its carbon dynamics to climate change will significantly affect the content of greenhouse gases in the atmosphere. However, due to the unique geographical environment characteristics of the Qinghai-Tibet Plateau, there is still much controversy about its carbon source and sink estimation results. This study designed a new algorithm based on machine learning to improve the accuracy of carbon source and sink estimation by integrating multiple scale carbon input (net primary productivity, NPP) and output (soil heterotrophic respiration, Rh) information from remote sensing and ground observations. Then, we compared spatial patterns of NPP and Rh derived from the fusion of multiple scale data with other widely used products and tried to quantify the differences and uncertainties of carbon sink simulation at a regional scale. Our results indicate that although global warming has potentially increased the Rh of the Qinghai-Tibet Plateau, it will also increase its NPP, and its current performance is a net carbon sink area (carbon sink amount is 22.3 Tg C/year). Comparative analysis with other data products shows that CASA, GLOPEM, and MODIS products based on remote sensing underestimate the carbon input of the Qinghai-Tibet Plateau (30–70%), which is the main reason for the severe underestimation of the carbon sink level of the Qinghai-Tibet Plateau (even considered as a carbon source). The estimation of the carbon sink in the Qinghai-Tibet Plateau is of great significance for ensuring its ecological barrier function. It can deepen the community’s understanding of the response to climate change in sensitive areas of the plateau. This study can provide an essential basis for assessing the uncertainty of carbon sources and sinks in the Qinghai-Tibet Plateau, and also provide a scientific reference for helping China achieve “carbon neutrality” by 2060.

更新日期：2023-09-14

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文

全部期刊列表>>