Micrometeorological measurements during the total solar eclipse of August 11, 1999

Foken, Thomas; Wichura, Bodo; Klemm, Otto; Gerchau, Jörg; Winterhalter, Martin; Weidinger, Tamás

doi:10.1127/0941-2948/2001/0010-0171

Cited by 60 publications

(56 citation statements)

References 11 publications

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“…10 cm below the surface), the energy storage in the canopy and the soil was often discussed as a reason for the unclosed energy balance. Foken et al (2001) reported for the total solar eclipse over Europe in 1999 that there is a time shift between the irradiation and the turbulent fluxes of up to 30 min, which has an influence on the energy balance closure. Kukharets et al (2000) also found that the soil heat flux and the energy balance closure are closely related due to the energy storage in the upper soil layer.…”

Section: Introductionmentioning

confidence: 99%

Some aspects of the energy balance closure problem

et al. 2006

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Abstract. After briefly discussing several reasons for the energy balance closure problem in the surface layer, the paper focuses on the influence of the low frequency part of the turbulence spectrum on the residual. Changes in the turbulent fluxes in this part of the turbulence spectrum were found to have a significant influence on the changes of the residual. Using the ogive method, it was found that the eddy-covariance method underestimates turbulent fluxes in the case of ogives converging for measuring times longer than the typical averaging interval of 30 min. Additionally, the eddy-covariance method underestimates turbulent fluxes for maximal ogive functions within the averaging interval, both mainly due to advection and non-steady state conditions. This has a considerable influence on the use of the eddy-covariance method.

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Section: Introductionmentioning

confidence: 99%

Some aspects of the energy balance closure problem

et al. 2006

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“…(Fabian, et al 2001) The solar eclipse also causes almost complete darkness for a shorter duration. (Nishanth, et al, 2011;Fabian, et al, 2001;Foken, et al, 2001) An illustration of phases occurring during the solar eclipse phenomenon is depicted in Figure 2. There are three types of solar eclipses depending on the distance of the Moon from the Earth: (Tiwari, 2015) (i) Total solar eclipse occurs when the Moon obscures the Sun (see Figure 2a).…”

Section: Solar Eclipse Phenomenonmentioning

confidence: 99%

“…In fact, when the solar eclipse occurs, the Sun is masked by the Moon and this causes the darkness for a shorter duration. (Fabian et al, 2001;Foken et al, 2001;Nishanth et al, 2011) The solar intensity, light spectrum, and UV irradiation decrease, (Fabian et al, 2001;Foken et al, 2001;Koepke et al, 2001;Zerefos et al, 2001;Nishanth et al, 2011) and this disturbs the light-dependent chemical reaction in the Earth, such as photosynthesis process. (Abram et al, 2000) Solar eclipse phenomenon has attracted researchers from various fields.…”

Section: Introductionmentioning

confidence: 99%

Photodecomposition Profile of Organic Material during the Partial Solar Eclipse of 9 March 2016 and Its Correlation with Organic Material Concentration and Photocatalyst Amount

Nandiyanto

Sofiani

Permatasari

et al. 2016

IJOST

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The present study investigated the photodecomposition of an organic material during the partial (88.76%) solar eclipse phenomenon of 9 March 2016 in Bandung, Indonesia. Curcumin and anatase titanium dioxide (TiO 2 ) particles were used as models of organic material and photocatalyst, respectively. The influence of the process parameters (i.e., curcumin concentration and the amount of TiO 2 ) on the photodecomposition process was also investigated. The results showed that the curcumin was decomposed along with the solar light irradiation time. During the solar eclipse, the photodecomposition rate is suddenly down. The partial solar eclipse provided a slower photodecomposition process than the process under sunny days (conducted on 8 and 10 March 2016). The concentration of curcumin and the amount of TiO 2 also have played an important role in the photodecomposition, in which the lower concentration of curcumin and the higher amount of TiO 2 have a correlation to the obtainment of higher photodecomposition rate.

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“…[2,5,7,9,11,12,15,19,25]) and are usually attributed to the increase in near-surface stability which reduces turbulent mixing, sometimes allowing near-surface flow to decouple from the geostrophic flow. Segal et al [15] showed that NSAT decreases were more rapid following the decoupling of winds at low levels.…”

Section: (G) Topographymentioning

confidence: 99%