[Near surface CO2 concentration and its quantitative relationship with character of underlying surface in Shanghai City, China].

摘要: Land use change and fossil fuel combustion due to urbanization have a significant effect on global carbon cycle climate change. It's important an explicit understanding of the spatial distribution CO2 recognize control GHG emission, which is helpful reduce human-induced contribution The study area this project was set in city Shanghai with intensive human activity rapid urbanization. monitoring near surface concentration along 3 transects conducted across urban-rural gradient by means infrared gas analyzer Li-840A spring, 2014. Remote sensing data were also used derive underlying information. Further quantitative analysis mechanism concentration's response characteristics presented paper. results showed that average (443.4±22.0) µmol . mol-1. center 12.5% (52.5 µLmol mol-1) higher than suburban area. Also, differentiation, highest northwest, second southwest, lowest southeast, accordance level surface. revealed vegetation coverage rate (CVeg) indicator describe negative correlation, impervious (CISA) had lower explanatory power positive correlation. found determination coefficient (R2) between (CCO2) CISA or CVeg achieved its value when buffer distance 5 km, their relationships be described stepwise regression equation: CCO2=0.32CISA-0.89CVeg+445.13 (R2 =0.66, P<0.01).