Cloudwater studies at a high elevation site in the Vosges Mountains (France)

Herckès, Pierre; Wendling, R.; Sauret, Nathalie; Mirabel, Philippe; Wortham, Henri

doi:10.1016/s0269-7491(01)00139-7

Cited by 15 publications

(4 citation statements)

References 39 publications

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“…Though many researchers have observed concentrations in fog that are higher than precipitation for a site [e.g., Jordan et al, 2000;Vong et al, 1997], results from this study indicate that in Hawaii, high fog water fluxes combine with several strong, sporadic chemical sources to result in higher deposition rates of several species than might be expected for a remote, marine environment. High deposition rates for chemical species in fog have been observed in many polluted environments and are a concern with regard to acid and metal deposition [e.g., Dollard et al, 1983;Harvey and McArthur, 1989;Herckes et al, 2002;Igawa et al, 1998]. Our study area is unusual in that the chemical sources determined for our sites are largely natural.…”

Section: Discussionmentioning

confidence: 98%

Atmospheric deposition of inorganic and organic nitrogen and base cations in Hawaii

Carrillo¹,

Hastings

Sigman

et al. 2002

Global Biogeochemical Cycles

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Section: Discussionmentioning

confidence: 98%

Atmospheric deposition of inorganic and organic nitrogen and base cations in Hawaii

Carrillo¹,

Hastings

Sigman

et al. 2002

Global Biogeochemical Cycles

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“…Compared to this value, a 20% contribution at high alpine sites in Europe seems rather low, but can be explained by (a) higher wet precipitation in Achenkirch (1900-2300 mm at Christlumkopf vs. 1400 mm at Whiteface), (b) a higher liquid water content of the clouds at Whiteface (0.44 g m )3 vs. 0.12 g m )3 at Christlumkopf) and (c) higher cloud frequency at Whiteface (28% vs. 12% at Christlumkopf). These results on the contribution of occult deposition to total deposition in an Alpine area were supported by findings for the locations Hoher Peißenberg (980 m a.s.l., about 30 km north of Garmisch-Partenkirchen, Germany) (Pahl et al, 1994) and Aubure (1146 m a.s.l., Vosges Mountains, France) (Herckes et al, 2001) and highlight the importance of taking occult deposition into account in assessing whether the CLs are exceeded, especially for mountainous ecosystems close to the timber line.…”

Section: Importance Of the Occult Impact On Total Depositionmentioning

confidence: 99%

An Overview of Atmospheric Deposition Chemistry over the Alps: Present Status and Long-term Trends

Rogora¹,

Mosello²,

Arisci³

et al. 2006

Hydrobiologia

120

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Several research programs monitoring atmospheric deposition have been launched in the Alpine countries in the last few decades. This paper uses data from previous and ongoing projects to: (i) investigate geographical variability in wet deposition chemistry over the Alps; (ii) assess temporal trends of the major chemical variables in response to changes in the atmospheric emission of pollutants; (iii) discuss the potential relationship between the status of atmospheric deposition and its effects on forest ecosystems in the alpine and subalpine area, focusing particularly on nitrogen input. We also present results of studies performed at a local level on specific topics such as long-term changes in lead deposition and the role of occult deposition in total nitrogen input. The analysis performed here highlights the marked geographical variability of atmospheric deposition in the Alpine region. Apart from some evidence of geographically limited effects, due to local sources, no obvious gradients were identified in the major ion deposition. The highest ionic loads were recorded in areas in the foothills of the Alps, such as the pre-alpine area in North-Western Italy and the area of Canton Ticino, Switzerland. Trend analysis shows a widespread decrease in the acidity of precipitation in the last 15-20 years as a consequence of the reduced emission of S compounds. On the other hand, nitrate concentrations in rain have not changed so much, and ammonium has decreased significantly only at the Austrian sampling sites. The deposition of N is still well above the estimated critical loads of nutrient N at some forest sites in the alpine and subalpine areas, thus confirming the critical situation of both terrestrial and aquatic ecosystems regarding N inputs. Existing data highlights the importance of continuously monitoring atmospheric deposition chemistry in the Alpine area, taking account of acidifying elements, nutrients and other pollutants such as heavy metals and organic compounds. There is also a need for unifying sampling and analytical methods in order to obtain comparable data from the different regions of the Alps.

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“…In particular, fog deposition significantly contributes to hydrological, nutrient and pollutant inputs in such mountainous regions. This is because high concentrations of solutes in fog water lead to fog deposition of these substances that can be as high as or higher than dry or wet deposition [ Igawa et al , 2002; Herckes et al , 2002; Lange et al , 2003]. The quantification of fog deposition onto forest canopies in mountainous areas is, therefore, of interest in terms of its effect on forest health and decline.…”

Section: Introductionmentioning

confidence: 99%

A method for simple and accurate estimation of fog deposition in a mountain forest using a meteorological model

Katata

Kajino²,

Hiraki

et al. 2011

J. Geophys. Res.

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[1] To apply a meteorological model to investigate fog occurrence, acidification and deposition in mountain forests, the meteorological model WRF was modified to calculate fog deposition accurately by the simple linear function of fog deposition onto vegetation derived from numerical experiments using the detailed multilayer atmosphere-vegetation-soil model (SOLVEG). The modified version of WRF that includes fog deposition (fog-WRF) was tested in a mountain forest on Mt. Rokko in Japan. fog-WRF provided a distinctly better prediction of liquid water content of fog (LWC) than the original version of WRF. It also successfully simulated throughfall observations due to fog deposition inside the forest during the summer season that excluded the effect of forest edges. Using the linear relationship between fog deposition and altitude given by the fog-WRF calculations and the data from throughfall observations at a given altitude, the vertical distribution of fog deposition can be roughly estimated in mountain forests. A meteorological model that includes fog deposition will be useful in mapping fog deposition in mountain cloud forests.Citation: Katata, G., M. Kajino, T. Hiraki, M. Aikawa, T. Kobayashi, and H. Nagai (2011), A method for simple and accurate estimation of fog deposition in a mountain forest using a meteorological model,

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Cloudwater studies at a high elevation site in the Vosges Mountains (France)

Cited by 15 publications

References 39 publications

Atmospheric deposition of inorganic and organic nitrogen and base cations in Hawaii

Atmospheric deposition of inorganic and organic nitrogen and base cations in Hawaii

An Overview of Atmospheric Deposition Chemistry over the Alps: Present Status and Long-term Trends

A method for simple and accurate estimation of fog deposition in a mountain forest using a meteorological model

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