基于OCO-2卫星观测连云港市二氧化碳特征分析

Analysis of Carbon Dioxide Characteristics in Lianyungang Based on OCO-2 Satellite Observation

本文基于OCO-2卫星观测数据和四队温室气体地基监测点数据,分析连云港市二氧化碳柱浓度时空分布特征。结果表明,连云港二氧化碳平均柱浓度区域分布总体上呈现东部和西部区域浓度较高、中部区域偏低态势。连云港市二氧化碳柱浓度保持逐年上升趋势。从二氧化碳柱浓度季节分布来看,冬季浓度最高,夏季浓度最低。从不同年度的季节分布来看,最高浓度均在冬季,但最低浓度并不相同。连云港市植被平均分布总体呈现沿海植被覆盖率较低、内陆覆盖率较高的态势。地基温室气体监测点二氧化碳浓度季节变化与卫星观测的二氧化碳柱浓度季节变化存在明显差异。四队地基监测点的二氧化碳浓度季节变化为夏季最高、秋季最低。

This article analyzes the spatio-temporal distribution characteristics of carbon dioxide column concentration in Lianyungang based on OCO-2 satellite observation and greenhouse gas monitoring station in Sidui.The results indicate that the regional distribution of average carbon dioxide column concentration in Lianyungang generally shows higher concentration in the eastern and western regions,while lower concentration in the central region.The carbon dioxide column concentration in Lianyungang has maintained an increasing trend year by year.From the seasonal distribution of carbon dioxide,the concentration is highest in winter and lowest in summer.From the seasonal distribution of different years,the highest concentration is in winter,but the lowest concentration is not the same.The average distribution of vegetation in Lianyungang generally shows that low coastal vegetation coverage and high inland vegetation coverage.There is a significant difference between the seasonal variation of carbon dioxide at ground greenhouse gas monitoring points and observed by satellite.The seasonal variation of carbon dioxide at ground monitoring points in Sidui is highest in summer and lowest in autumn.