摘要
以MODIS数据产品为数据源,采用ERDAS和GIS等软件,在运用C-FIX模型估算绿色植物净初级生产力(NPP)、净生态系统生产力(NEP)的基础上,以光合作用产生的碳氧质量比为理论依据,结合ARCGIS空间分析手段,实现了基于栅格数据的氧气净生产量估算及空间分布和差异性的分析。分析了黑龙江省2000年、2005年和2010年氧气净生产量、变化量以及其空间分异情况。结果表明:黑龙江省2000年、2005年和2010年净氧气产量分别为3.907×108t、3.562×108t和3.241×108t,2010年总氧气净生产量比2000年减少6.662×107t,年均减少率为1.71%;黑龙江省氧气净生产量空间分布以东南部、西北部、中部偏北地区及三江平原的东北部为高值区,西南部为低值区;不同土地类型的氧气净生产量差异显著,产氧量从高到低为林地、湿地、草地、旱地、其他;黑龙江省氧气净生产量在2000—2010年间呈减少趋势,且减少趋势逐渐增大,净氧气量减少主要是因为植被覆盖率减少所致。从行政区的划分来看,哈尔滨、伊春等地区植被退化明显,同时,这些地区氧气产量减少也最为严重,其余地区的植被也有不同程度的退化;从空间分布上来看,黑龙江省中部、东南部和西部2000—2010年间净氧气产量变化率较大,减少率普遍在20%以上,其中,小兴安岭地区净氧气产量减少最为严重,减少率超过40%,而东北部和北部变化相对较小。
This study aims to present the results of our estimation of the regional initial oxygen production, oxygen consumption in the plant respiration, NPP, NEP of the vegetation and net oxygen production by taking Heilongjiang Province as our case study sample. We have accomplished our estimation by using the C-FIX model based on the principle of photosynthesis and respiration of vegetation, along with the spatial analysis function of ArcGIS and the GPP of MODIS as data source, with such kinds of software as ERDAS and GIS. In proceeding with our research, we have conducted our estimation in terms of monthly, seasonal, and annual regional oxygen production volume based on the raster data while analyzing the difference of spatial distribution of regional oxygen production with our focus analysis of the net production of oxygen, variation and its spatial difference in the Province during the years of 2000, 2005 and 2010. Some results of our estimation can be shown as follows： （1） The net oxygen production of vegetation photosynthesis in the Province in 2000 was estimated at about 390.6957 million tons, and that in 2005 was 356.19 million tons whereas that of 2010 was 324.0705 million tons. The total net oxygen production in 2010 was found reduced to 66.6252 million tons as compared with that of 2000. Thus, the reduction rate was reduced by 1.17% in terms of annual average. （2） And the net oxygen production has been found distributed in such spatial way that the highest amount has been found in the southeastern, northwestern, central north and the northeast of SanJiang（the three river） plain area, in contrast to the lowest distribution in the southwest area of the province. In addition, much difference has been found between the different land-covers, except for meadow and dry-farming districts. On the whole, the net oxygen production has been found in the following： woodlands〉wetlands〉meadow〉dry-farming areas. （3） Our long-lasting measuring practice helps us to find that the net oxygen production
出处
《安全与环境学报》
CAS
CSCD
北大核心
2013年第2期130-135,共6页
Journal of Safety and Environment
基金
黑龙江省自然基金项目(F201041)
国家科技部"973"项目(2010CB950903)
关键词
地理学
区域氧气生产量
估算
空间分异
黑龙江省
geography
oxygen production of areas
estimation
spatial difference
Heilongjiang Province
