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@article{2291239,
author = {Kučera, Jiří and Hájek, Josef and Barták, Miloš and Šrámek, Vít},
article_location = {Brno},
article_number = {2},
doi = {http://dx.doi.org/10.5817/CPR2022-2-21},
keywords = {alpine ecosystems; thermal regime; grassland; Nardus sp; Pinus mugo},
language = {eng},
issn = {1805-0689},
journal = {Czech Polar Reports},
title = {Interannual variation of soil heat flux in a grass-dominated alpine tundra. Preliminary study from the Jeseníky Mts.},
url = {https://doi.org/10.5817/CPR2022-2-21},
volume = {12},
year = {2022}
}
TY - JOUR
ID - 2291239
AU - Kučera, Jiří - Hájek, Josef - Barták, Miloš - Šrámek, Vít
PY - 2022
TI - Interannual variation of soil heat flux in a grass-dominated alpine tundra. Preliminary study from the Jeseníky Mts.
JF - Czech Polar Reports
VL - 12
IS - 2
SP - 280-290
EP - 280-290
PB - Masaryk University
SN - 18050689
KW - alpine ecosystems
KW - thermal regime
KW - grassland
KW - Nardus sp
KW - Pinus mugo
UR - https://doi.org/10.5817/CPR2022-2-21
N2 - Soil heat flux (G) is an important component of the surface energy balance of terrestrial ecosystems. In polar and alpine tundra, G enters the subsurface layers during summer and relatively high G is released from soil during winter. Measuring of energy cycle in polar and alpine treeless ecosystems is challenging due to complex physics of seasonal changes associated with freeze-thaw cycle. That is why field data on G are much less abundant compared to the other World regions. In our 2 year study, we quantified soil heat flux in two alpine plots differing in the characteristics of vegetation cover. The first one was a wind-swept alpine grassland, while the other one was the same vegetation cover localized in a close neighbourhood of a patchy Pinus mugo stand. Our results suggest that both sites had similar yearly time courses of G with peak values of the heat flux to the soil recorded in spring season after the snow melt (April/May). Maxima of heat flux from the soil were found in the December-January period. In summer season (April-October), proportion of G to global radiation (R) reached low values, typically below 10%. Regression analysis revealed that in spite of similar vegetation cover and microrelief of the two study plots, the site neighbouring to the P. mugo stand responded to R more sensitively than the open plot dominated by a grassland community exclusive-ly. Data recorded and the relationships presented in the paper are discussed with the results of similar studies performed in polar and treeless alpine regions.
ER -
KUČERA, Jiří, Josef HÁJEK, Miloš BARTÁK a Vít ŠRÁMEK. Interannual variation of soil heat flux in a grass-dominated alpine tundra. Preliminary study from the Jeseníky Mts. \textit{Czech Polar Reports}. Brno: Masaryk University, 2022, roč.~12, č.~2, s.~280-290. ISSN~1805-0689. Dostupné z: https://dx.doi.org/10.5817/CPR2022-2-21.
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