EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Carbon dioxide and methane fluxes measurement for tundra ecosystem with ponds in High Arctic

Namyi Chae1, Hyewon Hwang2, Taejin Choi2, and Bang Yong Lee2
Namyi Chae et al.
  • 1Korea University, Institute of Life Science and Natural Resources, Seoul, Korea, Republic of (
  • 2Korea Polar Research Institute, Incheon, South Korea

In this study, CO2 and CH4 fluxes were measured in the tundra ecosystem in order to evaluate the potential future sensitivity of the carbon cycle to climate change using chamber systems and eddy covariance methods during summer in 2019 and 2022 in Canada. The study site is located on dry tundra with ponds in high-arctic near Cambridge Bay, Nunavut, Canada (69°7'47.7"N, 105°3'35.3"W). The vegetation cover around the site is mainly covered with dwarf-shrubs, graminoids, and lichens. CO2 and CH4 fluxes were examined to understand the mechanism of the carbon cycle over the tundra ecosystems with the pond. From chamber methods, the variability of net CO2 exchange was more sensitive to grass of wet condition than vegetation of dry condition and the variability and magnitude of CH4 emission near the pond was larger than that of dry condition. The emission CO2 and CH4 fluxes were examined positive relationship at almost bare soil of wet condition and negative relationship at various vegetation at dry condition. Net ecosystem exchange, ecosystem respiration, and gross primary production were measured or calculated using the both methods to investigate the influence of the ecosystem with ponds in the tundra carbon cycle. This study was supported by a National Research Foundation of Korea grant from the Korean government (MSIP) (NRF-2021M1A5A1065679 and NRF-2021R1I1A1A01053870).  

How to cite: Chae, N., Hwang, H., Choi, T., and Lee, B. Y.: Carbon dioxide and methane fluxes measurement for tundra ecosystem with ponds in High Arctic, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-1744,, 2023.