Research ReportDiurnal global ocean surface p CO 2 and air-sea CO 2 flux reconstructed from spaceborne LiDAR data.

Autor: Zhang S; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Nansha District, Guangzhou 511458, China.; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China., Chen P; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Nansha District, Guangzhou 511458, China., Hu Y; National Aeronautics and Space Administration Langley Research Center, Hampton, VA 23681, USA., Zhang Z; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Nansha District, Guangzhou 511458, China., Jamet C; Laboratoire d'Océanologie et de Géosciences (LOG), Université Littoral Côte d'Opale, CNRS, Université Lille, 62930 Wimereux, France., Lu X; National Aeronautics and Space Administration Langley Research Center, Hampton, VA 23681, USA., Dionisi D; Institute of Marine Sciences (ISMAR), Italian National Research Council (CNR), Rome - Tor Vergata 700185, Italy., Pan D; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Nansha District, Guangzhou 511458, China.; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Jazyk: angličtina
Zdroj: PNAS nexus [PNAS Nexus] 2023 Dec 14; Vol. 3 (1), pp. pgad432. Date of Electronic Publication: 2023 Dec 14 (Print Publication: 2024).
DOI: 10.1093/pnasnexus/pgad432
Abstrakt: The ocean absorbs a significant amount of carbon dioxide (CO 2 ) from the atmosphere, helping regulate Earth's climate. However, our knowledge of ocean CO 2 sink levels remains limited. This research focused on assessing daily changes in ocean CO 2 sink levels and air-sea CO 2 exchange, using a new technique. We used LiDAR technology, which provides continuous measurements during day and night, to estimate global ocean CO 2 absorption over 23 years. Our model successfully reproduced sea surface partial pressure of CO 2 data. The results suggest the total amount of CO 2 absorbed by oceans is higher at night than during the day. This difference arises from a combination of factors like temperatures, winds, photosynthesis, and respiration. Understanding these daily fluctuations can improve predictions of ocean CO 2 uptake. It may also help explain why current carbon budget calculations are not fully balanced-an issue scientists have grappled with. Overall, this pioneering study highlights the value of LiDAR's unique day-night ocean data coverage. The findings advance knowledge of ocean carbon cycles and their role in climate regulation. They underscore the need to incorporate day-night variability when assessing the ocean's carbon sink capacity.
(© The Author(s) 2023. Published by Oxford University Press on behalf of National Academy of Sciences.)
Databáze: MEDLINE
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