Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau
The slope aspect effect is widely distributed on the Qinghai-Tibet Plateau and has an important impact on the permafrost environment. The differences in surface heat exchange characteristics of different slope aspects in the permafrost region of Gu Mountain in the Beiluhe Basin were compared and ana...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6556dc71052448229b558d705e8361c9 2023-05-15T17:57:08+02:00 Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau Xingwen Fan Zhanju Lin Fujun Niu Aiyu Lan Miaomiao Yao Wenjiao Li 2022-10-01 https://doi.org/10.3389/fenvs.2022.1037331 https://doaj.org/article/6556dc71052448229b558d705e8361c9 en eng Frontiers Media S.A. 2296-665X doi:10.3389/fenvs.2022.1037331 https://doaj.org/article/6556dc71052448229b558d705e8361c9 undefined Frontiers in Environmental Science, Vol 10 (2022) permafrost energy balance soil heat flux slope effect slope aspect geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.3389/fenvs.2022.1037331 2023-01-22T18:19:11Z The slope aspect effect is widely distributed on the Qinghai-Tibet Plateau and has an important impact on the permafrost environment. The differences in surface heat exchange characteristics of different slope aspects in the permafrost region of Gu Mountain in the Beiluhe Basin were compared and analyzed based on observations of the south slope (sunny slope) and north slope (shadowy slope) from 2019 to 2021. The air-ground heat transfer process on the slopes was simulated using the Monin-Obukhov similarity theory. Then, the simulation results of the sensible and latent heat fluxes on the slopes were corrected and analyzed using the Bowen ratio correction method. The results show that under the influence of the solar altitude angle and subsurface conditions, the downward shortwave radiation (DR), upward shortwave radiation (UR), and upward longwave radiation (ULR) were higher on the sunny slope than those on the shadowy slope, whereas the downward longwave radiation (DLR) was lower than that on the shadowy slope. Jointly, the net radiation energy on the sunny slope was smaller than that on the shadowy slope, and the annual average net radiation difference reached 16.7 W·m−2. The annual and daily variations in soil heat flux on the sunny slope were higher than those on the shadowy slope. The energy closure rate on the sunny slope was high with a confinement rate of 0.85, whereas that on the shadowy slope was poor with a confinement rate of 0.51. The air-ground energy transfer patterns on the sunny and shadowy slopes showed obvious seasonal differences. Both slopes are dominated by the sensible heat exchange transfer mode in the cold season, whereas the shadowy slope is dominated by latent heat exchange in the warm season. This study improves our understanding of the distribution, development, and environmental effects of permafrost, under the influence of local factors. Article in Journal/Newspaper permafrost Unknown Frontiers in Environmental Science 10 |
institution |
Open Polar |
collection |
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language |
English |
topic |
permafrost energy balance soil heat flux slope effect slope aspect geo envir |
spellingShingle |
permafrost energy balance soil heat flux slope effect slope aspect geo envir Xingwen Fan Zhanju Lin Fujun Niu Aiyu Lan Miaomiao Yao Wenjiao Li Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
topic_facet |
permafrost energy balance soil heat flux slope effect slope aspect geo envir |
description |
The slope aspect effect is widely distributed on the Qinghai-Tibet Plateau and has an important impact on the permafrost environment. The differences in surface heat exchange characteristics of different slope aspects in the permafrost region of Gu Mountain in the Beiluhe Basin were compared and analyzed based on observations of the south slope (sunny slope) and north slope (shadowy slope) from 2019 to 2021. The air-ground heat transfer process on the slopes was simulated using the Monin-Obukhov similarity theory. Then, the simulation results of the sensible and latent heat fluxes on the slopes were corrected and analyzed using the Bowen ratio correction method. The results show that under the influence of the solar altitude angle and subsurface conditions, the downward shortwave radiation (DR), upward shortwave radiation (UR), and upward longwave radiation (ULR) were higher on the sunny slope than those on the shadowy slope, whereas the downward longwave radiation (DLR) was lower than that on the shadowy slope. Jointly, the net radiation energy on the sunny slope was smaller than that on the shadowy slope, and the annual average net radiation difference reached 16.7 W·m−2. The annual and daily variations in soil heat flux on the sunny slope were higher than those on the shadowy slope. The energy closure rate on the sunny slope was high with a confinement rate of 0.85, whereas that on the shadowy slope was poor with a confinement rate of 0.51. The air-ground energy transfer patterns on the sunny and shadowy slopes showed obvious seasonal differences. Both slopes are dominated by the sensible heat exchange transfer mode in the cold season, whereas the shadowy slope is dominated by latent heat exchange in the warm season. This study improves our understanding of the distribution, development, and environmental effects of permafrost, under the influence of local factors. |
format |
Article in Journal/Newspaper |
author |
Xingwen Fan Zhanju Lin Fujun Niu Aiyu Lan Miaomiao Yao Wenjiao Li |
author_facet |
Xingwen Fan Zhanju Lin Fujun Niu Aiyu Lan Miaomiao Yao Wenjiao Li |
author_sort |
Xingwen Fan |
title |
Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
title_short |
Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
title_full |
Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
title_fullStr |
Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
title_full_unstemmed |
Near-surface heat transfer at two gentle slope sites with differing aspects, Qinghai-Tibet Plateau |
title_sort |
near-surface heat transfer at two gentle slope sites with differing aspects, qinghai-tibet plateau |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fenvs.2022.1037331 https://doaj.org/article/6556dc71052448229b558d705e8361c9 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Environmental Science, Vol 10 (2022) |
op_relation |
2296-665X doi:10.3389/fenvs.2022.1037331 https://doaj.org/article/6556dc71052448229b558d705e8361c9 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3389/fenvs.2022.1037331 |
container_title |
Frontiers in Environmental Science |
container_volume |
10 |
_version_ |
1766165506654470144 |