2000～2020年青海湖流域草地生态系统碳储量及碳汇量时空变化研究
RESEARCH ON THE SPAIOTEMPORAL VARIATIONS OF CARBON STORAGE AND CARBON SEQUESTRATION IN THE GRASSLAND ECOSYSTEM OF THE QINGHAI LAKE BASIN FROM 2000 TO 2022
金显玲 1安杰才仁 2孙丰海 1俞君贤 1高君元3
作者信息
- 1. 青海省海北牧业气象试验站,青海海晏 812200
- 2. 海北藏族自治州气象局,青海海晏 812200
- 3. 海晏县气象局,青海海晏 812200
- 折叠
摘要
青海湖流域位于青藏高原东北部,是维系该地区生态平衡的重要屏障.利用MODIS NPP长时间序列遥感数据,结合土壤有机碳数据分析了2000～2020年青海湖流域的草地生态系统单位面积碳储量及其时空变化特征,同时基于MODISGPP数据及草地生态系统呼吸估算模型统计分析了草地生态系统单位面积碳汇量及其变化特征.结果表明:(1)青海湖流域草地生态系统总碳储量为349.96Tg,单位面积碳储量为13.83kg·m-2,整体呈环带特征,大致以辐射状分布.(2)近21a来,青海湖流域草地生态系统碳汇量多年平均值为17.14Tg,单位面积碳汇量为0.16kg·m-2·a-1,表明该地区草地生态系统是一个碳汇.
Abstract
The Qinghai Lake Basin,located in the northeastern part of the Qinghai-Tibet Plateau,is an essential barrier for maintaining the ecological balance in the region.By utilizing mODIS NPP long-term remote sensing data,combined with soil organic carbon data,the carbon storage per unit area of the grassland ecosystem in the Qinghai Lake Basin and its spatiotemporal variation characteristics from 2000 to 2020 were analyzed.Additionally,based on MODIS GPP data and a grassland ecosystem respiration estimation model,the carbon sequestration per unit area of the grassland ecosystem and its change characteristics were statistically analyzed.The results indicate:(1)The total carbon storage of the grassland ecosystem in the Qinghai Lake Basin is349.96Tg,with a unit area carbon storage of 13.83 kg·m-2,showing a zonal characteristic and radiating distribution pattern.(2)Over the past 21 years,the multi-year average carbon sequestration of the grassland ecosystem in the Qinghai Lake Basin is 17.14 Tg,with a unit area carbon sequestration rate of 0.16kg·m2·a-1,indicating that the grassland ecosystem in this area acts as a carbon sink.
关键词
青海湖流域/草地生态系统/碳储量/碳汇量/碳汇Key words
Qinghai Lake Basin/Grassland ecosystem/Carbon storage/Carbon sequestration/Carbon sink引用本文复制引用
出版年
2024
NETL
NSTL
万方数据