Summer pCO2 dynamics based on autonomous surface vehicles in eastern Bering Sea and Chukchi Sea
Abstract
The Pacific Arctic Region (PAR) attracts both scientific and public interest given the regional sensitivity to climate change and importance to the global carbon cycle. However, the limited infrastructure and hazardous conditions creates a paucity of data that hinders the scientific understanding of the carbon cycle in high-latitude areas, where complicated physical and biogeochemical processes from rapid climate changes are ongoing. The novel Autonomous Surface Vehicle CO2 (ASVCO2) system deployed on autonomous platforms such as the novel saildrone provides a unique opportunity to collect high-resolution spatiotemporal surface pCO2 data in this region. In this study, we present ASVCO2 pCO2 data collected in summer of 2017 and 2018 in the Bering and Chukchi Seas. According to comparison with concurrent underway/discrete measurements made from USCGC Healy during the Distributed Biological Observatory missions, moored pCO2 data collected from the M2 time series station and other well-established atmospheric CO2 time series measurements in high-latitude areas, we note that the ASVCO2 system performs well. For example, preliminary results show that the difference between ASVCO2 air xCO2 and Pt. Barrow atmospheric xCO2 was -0.05 ± 1.79 μatm (N = 421). We will also investigate the contributions of thermal and nonthermal processes to surface pCO2 variability. Results from this study will help elucidate carbon system dynamics in summer and provide important insight into the impacts of future climate change on the high-latitude coastal carbon cycle.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMC045.0004W
- Keywords:
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- 3349 Polar meteorology;
- ATMOSPHERIC PROCESSES;
- 0750 Sea ice;
- CRYOSPHERE;
- 1627 Coupled models of the climate system;
- GLOBAL CHANGE;
- 4540 Ice mechanics and air/sea/ice exchange processes;
- OCEANOGRAPHY: PHYSICAL