Nighttime analysis of the mechanisms that control CO2 and H2O gradients in a coastal region

Authors

DOI:

https://doi.org/10.5902/2179460X46923

Keywords:

CO2 gradient, H2O gradient, Thermeletric

Abstract

Understanding the water and carbon exchange in the soil-atmosphere system and the mechanisms that control these exchanges are fundamental to have a real and adequate representation of the physical processes involved. Under stable night conditions, carbon transfer processes such as respiration and water transfer processes such as dew deposition are more difficult to study by the eddy covariance method. Thus, the aim of this study is to investigate the mechanisms that control the exchange of water and carbon dioxide near a thermal power plant and the ocean, through the gradients of concentration of these quantities at different levels in the atmosphere. Data from the experimental site located in Linhares - ES - Brazil (19° 31'53 "S, 39° 48'03" W), 4 km from the coast and about 250 m from Linhares Geração SA thermeletric, were used. The concentrations of CO2 and H2O are measured by the AP200-Campbell system, which consists of vertically arranged chambers that pull gas flow at the following levels 1, 2, 5, 9, 15 and 20 m. In this study, a total of 67 nights (from 9 pm to 5 am), from 2017, were selected. The wind direction was from the north so that there was no interference from the thermal plant's feathers in the data analysis.

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Author Biographies

Maria Eduarda Oliveira Pinheiro, Universidade Federal de Santa Maria, Santa Maria, RS

Possui graduação em Física Bacharelado e Mestrado em Física pela Universidade Federal de Santa Maria. Atualmente faz Doutorado em Física pela Universidade Federal de Santa Maria

Otávio Costa Acevedo, Universidade Federal de Santa Maria, Santa Maria, RS

Possui graduação em Meteorologia pela Universidade Federal de Pelotas, mestrado em Meteorologia pela Universidade de São Paulo e doutorado em Ciências Atmosféricas pela State University of New York. Atualmente é professor associado da Universidade Federal de Santa Maria

Pablo Eli Soares de Oliveira, Universidade Federal de Santa Maria, Santa Maria, RS

Possui graduação, mestrado e doutorado em Meteorologia pela Universidade Federal de Santa Maria. Atualmente é meteorologista da Universidade Federal de Santa Maria

References

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Published

2020-08-28

How to Cite

Pinheiro, M. E. O., Acevedo, O. C., & Oliveira, P. E. S. de. (2020). Nighttime analysis of the mechanisms that control CO2 and H2O gradients in a coastal region. Ciência E Natura, 42, e22. https://doi.org/10.5902/2179460X46923

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