Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica
Abstract Heat transfer process in the soil active layer is important for the knowledge of its thermal properties linked with climate issues. The objective of this work was to analyze the energy flux in different soil profiles by estimating the apparent soil thermal diffusivity ($ATD$). The study was...
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ftdoajarticles:oai:doaj.org/article:c6e53b29bd73474c998714cb3ea597a5 2023-05-15T13:38:48+02:00 Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica DANIELA A. CHAVES GUSTAVO B. LYRA MÁRCIO R. FRANCELINO LEONARDO D.B. DA SILVA CARLOS E.R.G. SCHAEFER ANDRÉ THOMAZINI 2022-02-01T00:00:00Z https://doi.org/10.1590/0001-3765202220200458 https://doaj.org/article/c6e53b29bd73474c998714cb3ea597a5 EN eng Academia Brasileira de Ciências http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201102&lng=en&tlng=en http://www.scielo.br/pdf/aabc/v94s1/0001-3765-aabc-94-s1-e20200458.pdf https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202220200458 https://doaj.org/article/c6e53b29bd73474c998714cb3ea597a5 Anais da Academia Brasileira de Ciências, Vol 94, Iss suppl 1 (2022) heat flow freezing index seasonal temperature and soil moisture degree days of soil freezing Science Q article 2022 ftdoajarticles https://doi.org/10.1590/0001-3765202220200458 2022-12-31T00:45:54Z Abstract Heat transfer process in the soil active layer is important for the knowledge of its thermal properties linked with climate issues. The objective of this work was to analyze the energy flux in different soil profiles by estimating the apparent soil thermal diffusivity ($ATD$). The study was carried out in Keller Peninsula, located at King George Island in four different sites differing by soil characteristics, as well as vegetation coverage and landscape setting. The $ATD$ was estimated in function of the long-term hourly temperature records at different soil depths. In addition, we estimated the seasonal mean of the $ATD$ and the freezing $N$-factor. Results showed that $ATD$ values were smaller at shallow depths and increased with depth. The diffusivity values presented lower variability in colder conditions, especially at deeper soil layers. Water content was the main factor affecting soil thermal diffusivity at sites $1$ and $3$ (more than $70$ and $63\%$ of probability). At sites $3$ and $4$ lower $N$-factors were observed, suggesting higher snow pack and permafrost closer to the soil surface. Hence, positive $ATD$ appears in the summer due to thawing increases soil moisture, while negative $ATD$ appears during the freeze of the snow pack and precipitation. Article in Journal/Newspaper Antarc* Antarctica Ice King George Island permafrost Directory of Open Access Journals: DOAJ Articles King George Island Keller ENVELOPE(-58.406,-58.406,-62.073,-62.073) Keller peninsula ENVELOPE(-58.406,-58.406,-62.073,-62.073) Anais da Academia Brasileira de Ciências 94 suppl 1 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
heat flow freezing index seasonal temperature and soil moisture degree days of soil freezing Science Q |
spellingShingle |
heat flow freezing index seasonal temperature and soil moisture degree days of soil freezing Science Q DANIELA A. CHAVES GUSTAVO B. LYRA MÁRCIO R. FRANCELINO LEONARDO D.B. DA SILVA CARLOS E.R.G. SCHAEFER ANDRÉ THOMAZINI Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
topic_facet |
heat flow freezing index seasonal temperature and soil moisture degree days of soil freezing Science Q |
description |
Abstract Heat transfer process in the soil active layer is important for the knowledge of its thermal properties linked with climate issues. The objective of this work was to analyze the energy flux in different soil profiles by estimating the apparent soil thermal diffusivity ($ATD$). The study was carried out in Keller Peninsula, located at King George Island in four different sites differing by soil characteristics, as well as vegetation coverage and landscape setting. The $ATD$ was estimated in function of the long-term hourly temperature records at different soil depths. In addition, we estimated the seasonal mean of the $ATD$ and the freezing $N$-factor. Results showed that $ATD$ values were smaller at shallow depths and increased with depth. The diffusivity values presented lower variability in colder conditions, especially at deeper soil layers. Water content was the main factor affecting soil thermal diffusivity at sites $1$ and $3$ (more than $70$ and $63\%$ of probability). At sites $3$ and $4$ lower $N$-factors were observed, suggesting higher snow pack and permafrost closer to the soil surface. Hence, positive $ATD$ appears in the summer due to thawing increases soil moisture, while negative $ATD$ appears during the freeze of the snow pack and precipitation. |
format |
Article in Journal/Newspaper |
author |
DANIELA A. CHAVES GUSTAVO B. LYRA MÁRCIO R. FRANCELINO LEONARDO D.B. DA SILVA CARLOS E.R.G. SCHAEFER ANDRÉ THOMAZINI |
author_facet |
DANIELA A. CHAVES GUSTAVO B. LYRA MÁRCIO R. FRANCELINO LEONARDO D.B. DA SILVA CARLOS E.R.G. SCHAEFER ANDRÉ THOMAZINI |
author_sort |
DANIELA A. CHAVES |
title |
Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
title_short |
Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
title_full |
Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
title_fullStr |
Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
title_full_unstemmed |
Apparent thermal diffusivity of soil in ice-free areas of Keller peninsula in maritime Antarctica |
title_sort |
apparent thermal diffusivity of soil in ice-free areas of keller peninsula in maritime antarctica |
publisher |
Academia Brasileira de Ciências |
publishDate |
2022 |
url |
https://doi.org/10.1590/0001-3765202220200458 https://doaj.org/article/c6e53b29bd73474c998714cb3ea597a5 |
long_lat |
ENVELOPE(-58.406,-58.406,-62.073,-62.073) ENVELOPE(-58.406,-58.406,-62.073,-62.073) |
geographic |
King George Island Keller Keller peninsula |
geographic_facet |
King George Island Keller Keller peninsula |
genre |
Antarc* Antarctica Ice King George Island permafrost |
genre_facet |
Antarc* Antarctica Ice King George Island permafrost |
op_source |
Anais da Academia Brasileira de Ciências, Vol 94, Iss suppl 1 (2022) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201102&lng=en&tlng=en http://www.scielo.br/pdf/aabc/v94s1/0001-3765-aabc-94-s1-e20200458.pdf https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202220200458 https://doaj.org/article/c6e53b29bd73474c998714cb3ea597a5 |
op_doi |
https://doi.org/10.1590/0001-3765202220200458 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
94 |
container_issue |
suppl 1 |
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1766111208448983040 |