Diurnal Variation of Soil Heat Flux at an Antarctic Local Area during Warmer Months

Alves, Marco; Soares, Jacyra Ramos

doi:10.1155/2016/1769203

Cited by 7 publications

(7 citation statements)

References 31 publications

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“…Choi et al [13] reported that the mean monthly net radiation on an ice-free area on King George Island (KGI) was more than two-times larger than the values reported for glaciers in the AP region [9,10,14]. Unlike over ice-covered areas, ice-free ground in high latitudes can also be a heat source for the atmosphere [15]. Furthermore, coastal sites are affected by sea proximity, for instance by increased moisture availability for sublimation when the sea is free of ice [16].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, coastal sites are affected by sea proximity, for instance by increased moisture availability for sublimation when the sea is free of ice [16]. However, studies on the surface energy budget in ice-free areas have failed to agree on how the energy is portioned into turbulent and ground heat fluxes [13,15,17], which may be connected to the loss of the low-frequency fluctuation part of fluxes [18]. Thus, further research might help explain the discrepancies.…”

Section: Introductionmentioning

confidence: 99%

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The Summer Surface Energy Budget of the Ice-Free Area of Northern James Ross Island and Its Impact on the Ground Thermal Regime

2020

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Despite the key role of the surface energy budget in the global climate system, such investigations are rare in Antarctica. In this study, the surface energy budget measurements from the largest ice-free area on northern James Ross Island, in Antarctica, were obtained. The components of net radiation were measured by a net radiometer, while sensible heat flux was measured by a sonic anemometer and ground heat flux by heat flux plates. The surface energy budget was compared with the rest of the Antarctic Peninsula Region and selected places in the Arctic and the impact of surface energy budget components on the ground thermal regime was examined. Mean net radiation on James Ross Island during January–March 2018 reached 102.5 W m−2. The main surface energy budget component was the latent heat flux, while the sensible heat flux values were only 0.4 W m−2 lower. Mean ground heat flux was only 0.4 Wm-2, however, it was negative in 47% of January–March 2018, while it was positive in the rest of the time. The ground thermal regime was affected by surface energy budget components to a depth of 50 cm. The strongest relationship was found between ground heat flux and ground surface temperature. Further analysis confirmed that active layer refroze after a sequence of three days with negative ground heat flux even in summer months. Daily mean net radiation and ground heat flux were significantly reduced when cloud amount increased, while the influence of snow cover on ground surface temperature was negligible.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Summer Surface Energy Budget of the Ice-Free Area of Northern James Ross Island and Its Impact on the Ground Thermal Regime

2020

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“…Another simulation study using desert soils reported that 35% of net solar radiation may be transferred into soils (Niu et al, 1997). Additionally, soil heat flux was found to result in 7.6% of the net radiation being stored within soils during the day, acting as a heat source to the surface soil layers at night, accounting for more than 50% of the net nighttime radiation in the Antarctic during warmer months (Alves and Soares, 2016). Furthermore, long-term temperature monitoring in the Tibetan Plateau , revealed that soil temperatures were generally higher than surface air temperatures (Zhu et al, 2018).…”

Section: The Complementary Roles Of Atmospheric Air and Soil In The Gmentioning

confidence: 99%

An ignored key link in greenhouse effect: Soil and soil CO2 slow heat loss

Zhang

Shen

et al. 2020

Soil Ecol. Lett.

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The ever-increasing atmospheric CO 2 concentration is a key driver of modern global warming. However, the low heat capacity of atmosphere and strong convection processes in the troposphere both limit heat retention. Given the higher heat capacity and CO 2 concentration in soil compared to the atmosphere, the direct contributions of soil to the greenhouse effect may be significant. By experimentally manipulating CO 2 concentrations both in the soil and the atmosphere, we demonstrated that the soil-retained heat and the slower soil heat transmission decrease the amount of heat energy leaking from the earth. Furthermore, the soil air temperature was affected by soil CO 2 concentration, with the highest value recorded at 7500 ppm CO 2. This study indicates that soil and soil CO 2 , together with atmospheric CO 2 , play a crucial role in the greenhouse effect. The spatial and temporal heterogeneity of soils and soil CO 2 should be further investigated, given their potentially significant influence on global climate change.

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“…5b. The soil heat flux is the conduction of energy per unit area in response to a temperature gradient [3]. Shortwave radiation incident on the surface is the most important energy for almost all geophysical processes.…”

Section: Workhop Sobre Areias Monazíticasmentioning

confidence: 99%

Investigation of the surface-atmosphere interaction on the coastal region of the monazite sands of Meaípe, Guarapari (ES) - preliminary results

Soares¹,

Ribeiro²,

Codato³

2019

Blucher Material Science Proceedings

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Investigation of the surface-atmosphere interaction on the coastal region of the monazite sands of Meaípe, Guarapari (ES) -preliminary results RESUMOO conhecimento do comportamento das variáveis meteorológicas pode ser importante para o mapeamento do deslocamento temporal e espacial da radiação natural ionizante presente na região costeira de Meaipe. Com esse objetivo estão sendo realizadas medidas observacionais simultâneas das variáveis atmosféricas de alta e baixa frequências e da intensidade da radioatividade local, radiação gama, na camada limite superficial da região. Resultados desta pesquisa científica proporcionarão um alicerce para estudo futuro sobre o efeito biológico das doses de radiação natural associadas às areias monazíticas. Pretende-se estabelecer, em Meaípe, uma base experimental permanente para estudos físicos e biológicos da radiação ionizante local. ABSTRACTThe knowledge of the behavior of the meteorological variables may be important to map temporal and spatial displacement of the natural ionizing radiation present in the coastal region of Meaipe. With this objective, simultaneous observational measurements of the atmospheric variables of high and low frequencies and the intensity of the local radioactivity, gamma radiation, in the surface boundary layer of the region are being carried out. Results of this scientific research will provide a foundation for future study on the biological effect of natural radiation doses associated with monazite sands. It is intended to establish in Meaípe a permanent experimental basis for physical and biological studies of local ionizing radiation.

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Diurnal Variation of Soil Heat Flux at an Antarctic Local Area during Warmer Months

Cited by 7 publications

References 31 publications

The Summer Surface Energy Budget of the Ice-Free Area of Northern James Ross Island and Its Impact on the Ground Thermal Regime

The Summer Surface Energy Budget of the Ice-Free Area of Northern James Ross Island and Its Impact on the Ground Thermal Regime

An ignored key link in greenhouse effect: Soil and soil CO2 slow heat loss

Investigation of the surface-atmosphere interaction on the coastal region of the monazite sands of Meaípe, Guarapari (ES) - preliminary results

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