Quantifying CO<sub>2</sub> Uptakes Over Oceans Using LIDAR: A Tentative Experiment in Bohai Bay
Tianqi Shi, Ge Han, Xin Ma, Wei Gong, Weibiao Chen, Jiqiao Liu, Xingying Zhang, Zhipeng Pei, Hailong Gou, Lingbing Bu
Abstract
Abstract Oceans are widely regarded as major offsets for anthropogenic carbon emissions, leading to an evident lower measured atmospheric CO 2 concentration than expected. It is thus of great significance to develop effective means to monitor CO 2 fluxes over oceans globally. In this work, we utilized observations obtained by an airborne CO 2 ‐IPDA LIDAR to evaluate the potential of such means in estimating sea‐air CO 2 flux. During a flight experiment in 2019, we have estimated the CO 2 exchange rate, −1.5 ± 0.18 mmol/m 2 /h, between the Bohai Bay and the atmosphere using equilibrium atmospheric boundary layer theory. These findings indicated that the forthcoming space‐borne CO 2 ‐IPDA LIDAR is capable of identifying CO 2 uptakes over oceans qualitatively, which would be a novel means and a basis for monitoring CO 2 fluxes over global oceans.