Precisious Observations of Atmospheric Carbon Dioxide and Methane Mole Fractions in the Polar Belt of Near-Yenisei Siberia

The paper presents a new monitoring station DIAMIS for continuous precisious observations of atmospheric carbon dioxide (CO 2 ) and methane (CH 4 ) mole fractions over the Yenisei Gulf, on the southwestern coast of the Taimyr Peninsula at the edge of the Dikson settlement. Here, we summarize technical details of the instrumental setup, give an overview of calibration and data processing algorithms, describe local environments of the study area, and analyze the seasonal footprint of the measurement station. Based on the observations in September 2018–February 2020, a comparative analysis of the atmospheric CO 2 and CH 4 annual variations in the polar belt (DIAMIS) and middle-taiga subzone (ZOTTO observatory) of near-Yenisei Siberia is presented.