Monitoring of Kr and Xe isotopes in air using liquid oxygen

Dubasov, Yu. V.; Okunev, N. S.; Malimonova, S. I.

doi:10.1134/s1066362212030150

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Several models were compared with 85 Kr air concentrations in the area surrounding a nuclear processing plant in North West France where mean concentrations were estimated during steady wind conditions, although peaks were not accurately predicted under changing wind conditions [177]. Possible sources of Xe and Kr radionuclides were determined by back trajectory analysis in St. Petersburg, Russia, from Sweden and Finland [178]. Integrated effects of transport and meteorology have been observed in radionuclide activities in southern Spain and the transitional location of the Iberian Peninsula was revealed [179].…”

Section: Applications In Transport Of Hazardous Substancesmentioning

confidence: 99%

Applications of Air Mass Trajectories

Pérez

Artuso

Mahmud

et al. 2015

Advances in Meteorology

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Air trajectory calculations are commonly found in a variety of atmospheric analyses. However, most of reported research usually focuses upon the transport of pollutants via trajectory routes and not on the trajectory itself. This paper explores the major areas of research in which air trajectory analyses are applied with an effort to gain deeper insights into the key points which highlight the necessity of such analyses. Ranging from meteorological applications to their links with living beings, air trajectory calculations become important tool especially when alternative procedures do not seem possible. This review covers the reports published during last few years illustrating the geographical distribution of trajectory applications and highlighting the regions where trajectory application research proves most active and useful. As a result, relatively unexplored areas such as microorganism transport are also included, suggesting the possible ways in which successful use of air trajectory research should be extended.

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Section: Applications In Transport Of Hazardous Substancesmentioning

confidence: 99%

Applications of Air Mass Trajectories

Pérez

Artuso

Mahmud

et al. 2015

Advances in Meteorology

View full text Add to dashboard Cite

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Analysis of air mass trajectories in the northern plateau of the Iberian Peninsula

Pérez

Sánchez

García

et al. 2015

Journal of Atmospheric and Solar-Terrestrial Physics

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This paper presents: (a) results of gross primary production (GPP) 8-d estimated values using a light use efficiency model (LUE) in a non-irrigated rotating rapeseed crop in the upper Spanish plateau, and (b) inter-comparison results of observed GPP with those concurrently retrieved by MODIS. The rotation scheme over the four-year study comprised rapeseed, wheat, peas and rye. Rapeseed, peas and, in part, rye grew under well-watered conditions whereas wheat was dominated by drought. Input data for the LUE model were the fraction of PAR absorbed (FPAR) 8-d products supplied by MODIS (FPAR MODIS), in situ photosynthetic active radiation (PAR) measurements and a scalar f varying between 0 and 1, to take into account the reduction of the maximum PAR conversion efficiency (ε 0LUE) under limiting environmental conditions. In this study, f values were assumed to be dependent on air temperature (T) and the evaporative fraction which was considered a proxy of water availability. ε 0LUE , a key parameter in LUE models, which varied according to land use, was derived through the results of a linear regression fit between observed GPP and concurrent G APAR estimates defined as the product of PAR, FPAR MODIS and f. Overall, the LUE model provided satisfactory results, R 2 = 86.3%, significantly improving GPP MODIS estimates (GPP MODIS), R 2 = 71.8%. GPP MODIS uncertainties have primarily been attributed to differences in the f stress factor involved in its formulation (f MODIS) depending on vapour pressure deficit and T which did not fully describe the environmental stress conditions at the measuring site. Overall, ε 0LUE yielded 3.33 ± 0.10 g C MJ −1 although this varied depending on crop architecture, phenology and prevailing meteorological conditions. Crop-to-crop ε 0LUE ranged from 2.74 ± 0.17 to 3.95 ± 0.19 g C MJ −1 for peas and rye, respectively, yielding intermediate values for rapeseed and wheat, 2.92 ± 0.18 and 2.86 ± 0.23 g C MJ −1 , respectively. ε 0MODIS , derived from the linear fit of GPP versus GPP MODIS estimates, yielded 2.13 ± 0.10 g C MJ −1 and crop-to-crop ranged from 1.28 ± 0.17 to 2.41 ± 0.12 g C MJ −1 for wheat and rapeseed, respectively. The best linear fits corresponded to crops growing under well-watered conditions, rapeseed and peas, and the worst fits were for wheat, affected by drought. GPP annuals were 1680, 710, 730 and 1410 g C m −2 for rapeseed, wheat, peas and rye, respectively.

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Monitoring of Kr and Xe isotopes in air using liquid oxygen

Cited by 2 publications

References 5 publications

Applications of Air Mass Trajectories

Applications of Air Mass Trajectories

Analysis of air mass trajectories in the northern plateau of the Iberian Peninsula

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