Inorganic Chemistry in the Mountain Critical Zone

Roux, Gaël Le; Hansson, Sophia V.; Claustres, Adrien

doi:10.1016/b978-0-444-63787-1.00003-2

Cited by 11 publications

(4 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Residue from the activities of these industries could contribute to the sources of these influential heavy metals in the area. The sources of Zn, As and Cd in the southern part of the study area may be link to transportation related sources (human impact) such as brake pads, wear of tires, and dispersion of lubricants oil, coal, and incineration of industrial and household waste ( Yatkin and Bayram 2008 ; Cannon and Horton 2009 ; Le Roux et al. 2016 ).…”

Section: Resultsmentioning

confidence: 99%

Geographically weighted principal component analysis for characterising the spatial heterogeneity and connectivity of soil heavy metals in Kumasi, Ghana

Aidoo¹,

Appiah²,

Awashie³

et al. 2021

Heliyon

View full text Add to dashboard Cite

Geographically weighted principal component analysis for characterising the spatial heterogeneity and connectivity of soil heavy metals in Kumasi, Ghana, HELIYON, https://doi.org/10.1016/ j.heliyon.2021.e08039. This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Section: Resultsmentioning

confidence: 99%

Geographically weighted principal component analysis for characterising the spatial heterogeneity and connectivity of soil heavy metals in Kumasi, Ghana

Aidoo¹,

Appiah²,

Awashie³

et al. 2021

Heliyon

View full text Add to dashboard Cite

show abstract

“…Wind colliding with mountains causes dynamic lifting of moisture laden air to higher altitudes (creating orographic clouds). This process favors precipitation (Houze, ; Le Roux et al, ), and the steepness of the terrain produces high kinetic energy runoff. Both of these parameters induce a high stream discharge potential and reactivity in the watershed (Jeong et al, ).…”

Section: Discussionmentioning

confidence: 99%

Peatland Contribution to Stream Organic Carbon Exports From a Montane Watershed

et al. 2019

Self Cite

View full text Add to dashboard Cite

Mountains contain many small and fragmented peatlands within watersheds. As they are difficult to monitor, their role in the water and carbon cycle is often disregarded. This study aims to assess the stream organic carbon exports from a montane peatland and characterizes its contribution to the water chemistry in a headstream watershed. High frequency in situ monitoring of turbidity and fDOM were used to quantify respectively particulate organic carbon (POC) and dissolved organic carbon (DOC) exports at the inlet and outlet of a peatland over three years in a French Pyrenean watershed (1,343 m.a.s.l.). The DOC and POC signals are both highly dynamic, characterized by numerous short peaks lasting from a few hours to a few days. Forty-six percent of the exports occurred during 9% of the time corresponding to the highest flows monitored at the outlet. Despite its small area (3%) within the watershed, the peatland contributes at least 63% of the DOC export at the outlet. The specific DOC flux ranges from 16.1 ± 0.4 to 34.6 ± 1.5 g m 2 year −1 . POC contributes 17% of the total stream organic carbon exports from the watershed. As the frequency of extreme climatic events is expected to increase in the context of climate change, further studies should be conducted to understand the evolution of underestimated mountainous peatland carbon fluxes and their implication in the carbon cycle of headwaters. Plain Language SummarySince the last glacial period, peatlands have accumulated large stocks of organic carbon. Despite representing only 3% of global continental surfaces, they store about 22% of the continental soil carbon stock. In the context of global change, peatland carbon sequestration capacity needs to be carefully monitored. In addition to greenhouse gas exchanges with the atmosphere, determining this capacity requires the quantification of aquatic organic carbon exports. Aquatic organic carbon exports have rarely been investigated at mountainous peatlands. Moreover, global change is expected to drastically modify mountain hydrology, influencing aquatic carbon exports and carbon balance of mountainous peatlands. Using high frequency in situ instrumentation, this study shows the annual quantity of aquatic organic carbon exported from a montane peatland in the French Pyrenees is in the same range as Northern lowland peatlands. These highly variable exports mainly occur during high discharge events due to snowmelt or rainfalls. Despite its restricted area, this montane peatland is the main contributor of aquatic organic carbon in the watershed. Peatlands influence headwater chemistry and further study must be conducted to monitor the evolution of these mountainous carbon stocks.

show abstract

“…Emission of N r can travel long and borderless distances, being transported thousands of kilometers before being deposited, sometimes reaching the most remote areas of the globe, exposing worldwide forest ecosystems to anthropogenic pressure (Le Roux et al, 2016). On ecosystems, additional N r from deposition can trigger a wide range of consequences, described by Galloway et al (2003) as the Ncascade effect.…”

Section: Introductionmentioning

confidence: 99%

“…The deposition dynamics involve a complex suite of processes divided in dry deposition (mainly driven by air turbulence and wind speed, (Ould-Dada, 2002)), wet deposition (connected to and controlled by wet precipitation events) and occult deposition (i.e. cloud droplets and fog, intermediate between the previous two pathways) (Le Roux et al, 2016). The deposition rates are variable as they depend on the chemistry of the pollutant, topography, predominant wind directions, and vegetation composition and type (Le Roux et al, 2020).…”

Section: Introductionmentioning

confidence: 99%