基于PLUS-InVEST模型吐哈盆地陆地生态系统碳储量时空变化及多情景模拟  

Spatiotemporal variation and multiscenario simulation of carbon storage in terrestrial ecosystems in the Turpan-Hami Basin based on PLUS-InVEST model

作　　者：韩楚翘 郑江华[1,2] 王哲 于雯婕[1] HAN Chuqiao;ZHENG Jianghua;WANG Zhe;YU Wenjie(College of Geography and Remote Sensing Sciences,Xinjiang University,Urumqi 830017,Xinjiang,China;Xinjiang Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi 830017,Xinjiang,China)

机构地区：[1]新疆大学地理与遥感科学学院,新疆乌鲁木齐830017 [2]新疆绿洲生态重点实验室,新疆乌鲁木齐830017

出　　处：《干旱区地理》2024年第2期260-269,共10页Arid Land Geography

基　　金：吐哈盆地水资源调查和承载力评估——吐哈盆地地表水文水资源要素调查项目(2021xjkk1001)资助。

摘　　要：土地覆盖变化能够改变区域碳储存能力,从而引起全球气候变化。研究土地覆盖变化对碳储量的影响,预测未来不同土地覆盖情景下的碳储量,对实现区域“碳中和”战略目标具有重要意义,然而目前针对中国西部生态脆弱区的研究仍有待探究。以新疆吐哈盆地为研究区,基于土地覆盖产品数据,结合PLUS模型和InVEST模型,探讨了土地覆盖变化与区域碳储量的时空变化关系,预测和评估了2025、2030年可持续发展情景,维持现状发展情景,经济优先发展情景下土地覆盖和碳储量的时空动态特征。结果表明:(1)近20 a来,吐哈盆地耕地和裸土地面积增加最大,其次是建设用地,而草地表现出最大的减少趋势,草地转为耕地和建设用地是最主要的转移类型。(2)2000、2010年和2020年吐哈盆地平均碳储量分别为26.01 t·hm~(-2)、25.68 t·hm~(-2)、25.73 t·hm~(-2),呈现出先降低后增加的趋势,平均碳储量累计减少了0.28 t·hm~(-2),其中土壤有机质碳储量占比最高,约占总碳储量的94%,裸土地、草地贡献了最多的碳储量。(3)2030年3种情景下,森林、灌木林、湿地几乎无明显变化,裸土地呈现出减少的趋势,而建设用地呈现增加的趋势。(4)到2030年可持续发展情景下吐哈盆地总碳储量较2020年增加了0.18×10~6t,维持现状发展情景和经济优先发展情景下分别减少了0.30×10~6t、1.01×10~6t,经济优先发展情景下碳储量损失最大。研究结果可为吐哈盆地土地利用优化以及制定生态系统可持续发展措施提供依据。Land cover variations can change regional carbon storage capacity,thereby affecting global climate change.Investigating the impact of land cover changes on carbon stocks and predicting the carbon stocks under different land cover scenarios are crucial in the future for achieving the regional strategic goal of“carbon neutrali-ty”.However,ecologically fragile(such as land degradation and desertification)areas in western China remain to be explored.This study selected the Turpan-Hami Basin in Xinjiang as the study area based on the land cover product data,PLUS model,and InVEST model.Furthermore,this paper discusses the spatiotemporal relationship between land cover changes and regional carbon storage and predicts and evaluates their spatiotemporal dynamic characteristics under sustainable development scenarios,maintaining the status quo development scenario,and economic priority development scenarios in 2025 and 2030.The results showed that:(1)In the last 20 years,the Turpan-Hami Basin has the most significant increase in cultivated land and bare land areas among its various land use types,followed by construction land.Conversely,grasslands have exhibited the most notable decreasing trend.Additionally,the conversion of grassland to cultivated and construction lands was the main transfer type.(2)In 2000,2010,and 2020,the average carbon storage in the Turpan-Hami Basin was 26.01 t·hm-2,25.68 t·hm-2,and 25.73 t·hm-2,respectively,indicating a trend of first decreasing and then increasing.The cumulative average carbon storage decreased by 0.28 t·hm-2,of which the carbon storage of soil organic matter accounted for the highest proportion,approximately 94%of the total carbon storage.Bare land and grassland contributed the most to carbon storage.(3)Under the three scenarios in 2030,no noticeable change was observed in forests,shrubbery,and wetlands;moreover,bare land showed a decreasing trend,while construction land showed an increasing trend in land cover.(4)By 2030,the total carbon storage of Turpan-Hami Basin und

关 键 词：土地覆盖变化 情景模拟 碳储量 吐哈盆地 

分 类 号：P467[天文地球—大气科学及气象学] X171.1[环境科学与工程—环境科学]