Partitioning of net CO exchanges at the city-atmosphere interface into biotic and abiotic components.

Eddy covariance (EC) method has been used to measure CO fluxes over various ecosystems. Recently, the EC method has been also deployed in urban areas to measure CO fluxes. Urban carbon cycle is complex because of the additional anthropogenic processes unlike natural ecosystems but the EC method only measures the net sum of all CO sources and sink.

Comparative assessment of net CO exchange across an urbanization gradient in Korea based on eddy covariance measurements.

Background: It is important to quantify changes in CO sources and sinks with land use and land cover change. In the last several decades, carbon sources and sinks in East Asia have been altered by intensive land cover changes due to rapid economic growth and related urbanization. To understand impact of urbanization on carbon cycle in the monsoon Asia, we analyze net CO exchanges for various land cover types across an urbanization gradient in Korea covering high-rise high-density residential, suburban, cropland, and subtropical forest areas.

Temporal dynamics of urban heat island correlated with the socio-economic development over the past half-century in Seoul, Korea.

Urban heat island (UHI), an iconic consequence of anthropogenic activities and climate condition, affects air pollution, energy use, and health. Therefore, better understanding of the temporal dynamics of UHI is required for sustainable urban planning to mitigate air pollution under a changing climate. Here, we present the evolution of UHI intensity (UHIi) and its controlling factors in the Seoul metropolitan area, Korea, over the last 56 years (1962-2017), which has experienced unique compressed economic growth and urban transformation under monsoon climate.

Aerodynamic roughness variation with vegetation: analysis in a suburban neighbourhood and a city park.

Local aerodynamic roughness parameters (zero-plane displacement, , and aerodynamic roughness length, ) are determined for an urban park and a suburban neighbourhood with a new morphometric parameterisation that includes vegetation. Inter-seasonal analysis at the urban park demonstrates determined with two anemometric methods is responsive to vegetation state and is 1-4 m greater during leaf-on periods. The seasonal change and directional variability in the magnitude of is reproduced by the morphometric methods, which also indicate can be more than halved during leaf-on periods.