摘要
针对中国草原、荒漠草原生态系统承载的温室气体量在区域大尺度上无法有效量化的问题,本研究通过生态系统温室气体值(green-house gas value,GHGV)模型,利用国内1990–2015年共6期的草原、荒漠草原的土地利用数据,开展草原时空变化分析,结合全球和中国本地化后的两套模拟参数分别模拟分析中国草原、荒漠草原近25年来对3类主要温室气体(CO2、CH4、N2O)的封存潜力。结果显示,研究时段内,草原、荒漠草原的面积呈下降趋势,对温室气体的封存潜力有所减弱,封存的温室气体减少了1.93 Pg·CO2-eq–1。通过对比参数本地化和模型自带参数的模拟结果发现,本地化参数后草原、荒漠草原生态系统的温室气体模拟值均大于使用全球参数的模拟值。本研究同时发现,从草原面积到草地的碳储量,当前研究均面临量值差异的挑战,亟待开展更多深入的研究。
Since the amount of greenhouse gases carried by China's steppe and desert steppe ecosystems cannot be effectively quantified on a large scale in the region, this study utilized the greenhouse gas value (GHGV) model and land-use data to analyze spatiotemporal changes in steppe data. The two sets of simulation parameters (global and localized) were combined to simulate the storage potential of three major types of greenhouse gases (CO2, CH4, N2O) in China's steppe and desert steppe ecosystems in the past 25 years. During the study period, the area of the steppe and desert steppe showed a downward trend, and the storage potential of greenhouse gases was weakened. The stored greenhouse gas was reduced by 1.93 Pg·CO2-equivalent–1. Comparing the localization parameter with the simulation results of the model's own parameters, revealed that the simulated greenhouse gas values for the steppe and desert steppe ecosystems with localization parameters were larger than the simulated values using global parameters. Furthermore, this study found that the current research is faced with the challenge of quantitative difference from steppe area to steppe carbon storage, and additional in-depth research is urgently needed.
作者
李楠
崔耀平
张帅帅
刘素洁
付一鸣
LI Nan;CUI Yaoping;ZHANG Shuaishuai;LIU Sujie;FU Yiming(Collaborative Innovation Center for the “Three Modernization” Harmonious Development of CentralPlains Economic Region / Key Laboratory of Geospatial Technology for the Middle and LowerYellow River Regions,Kaifeng 475004,Henan,China)
出处
《草业科学》
CAS
CSCD
2019年第2期324-334,共11页
Pratacultural Science
基金
国家自然科学基金(41671425
41401504)
关键词
草原
荒漠草原
气候调节
温室气体值模型
固碳
百年尺度模拟
steppe
desert steppe
climate regulation
greenhouse gas value
carbon fixation
century-scale simulation
