摘要
近年来新疆经济发展迅速,区域生态系统碳氧循环负荷加大,粗放的经济发展形势下生态系统碳氧平衡状态发生变化,生态环境质量出现下滑。本文利用土地变更数据和统计年鉴数据,结合相关研究的成熟模型,对新疆1999—2014年碳氧平衡状态进行估算与分析。结果表明:(1)土地变更中耕地、林地与牧草地面积变动对整体土地格局具有更强影响力,除牧草地外,各土地类型面积逐年稳定增加,其中园地与交通用地变化幅度较大。(2)新疆地区截止2014年末净CO2排放量占总固定量的36.04%。(3)截止2014年末净O2消耗量占总释放量的32.06%,自2003年以来氧消耗量已大于释放量,碳循环自1999年以来一直处于不平衡状态。(4)生态补偿机制表现出积极作用,CO2固定量增长4.56%,O2释放量增长13.81%。目前,新疆碳氧循环系统已处不平衡状态,虽然目前产生的负面影响仍很微弱,但长期以往势必对该区生态系统稳定造成不良影响,值得对其展开长期的连续观测。
With the recent rapid urbanization in China, the carbon and oxygen cycling load in urban ecosystem had been increasing. It is very important to estimate the balance of carbon and oxygen. In this study, we used the data of land use and land cover change （LUCC） and the date from the statistical yearbooks, based on the carbon dioxide emissions model by Chinese Academy of Sciences, we estimated the carbon oxygen balance in Xinjiang, China from 1999-2014. The result showed as follows： （1） the change of cultivated land, forest land and grass- land area has a greater influence on the overall land allocation, and the area of every land type was increased steadily annually except the grassland. The areas occupied by the gardens and the land areas for transportation were changed the most; （2） by the end of 2014, the net CO2 emission accounted for 36.04% of the total fixed amount of carbon dioxide; （3） by the end of 2014, the net O2 consumption accounted for 32.06% of the total release of O2; （4） the ecological compensation mechanism has shown a positive effect. The fixed amount of CO2 was increased by 4.56%, and O2 emissions were increased by 13.81%. The carbon and oxygen cycle system was in a state of overloaded and unbalanced. Although the negative impact was still weak, but in the long run, it is bound to affect the stability of the ecosystem adversely.
作者
姬盼盼
高敏华
JI Pan-pan;GAO Min-hua(Key laboratory Oasis Ecology,Urumqi 830046,Xinjiang,China;Institute of Resource and Environment Science,Xinjiang University,Urumqi 830046,Xinjiang,China)
出处
《干旱区地理》
CSCD
北大核心
2018年第3期608-615,共8页
Arid Land Geography
关键词
碳氧平衡
模型
土地变更
碳释放量
氧消耗量
新疆
carbon oxygen balance
model
land change
carbon emission
oxygen consumption
Xinjiang
