Time scale and conditions of weathering under tropical climate: Study of the Amazon basin with U-series

Dosseto, Anthony; Bourdon, Bernard; Gaillardet, Jérôme; Allègre, C. J.; Filizola, Naziano

doi:10.1016/j.gca.2005.06.033

Cited by 127 publications

(63 citation statements)

References 60 publications

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“…However, the dominant factors have different controlling mechanisms under different climates, as reported by previous authors (Riebe et al, 2001;Dosseto et al, 2006;Liu et al, 2012). Within the study area, chemical weathering rates of silicate and carbonate in the 2nd Songhuajiang River Basin are much higher than that of the Nenjiang River Basin.…”

Section: Climate (Temperature and Runoff) As A Main Control On Chemicsupporting

confidence: 50%

“…The dominant factor differs under different climates. For example, weathering may respond rapidly to high-frequency climatic fluctuations under a tropical climate (Dosseto et al, 2006). Liu et al (2012) showed that temperature and precipitation were the principal factors while tectonics was only a subordinate factor controlling the chemical weathering in tropical SE Asia.…”

Section: Introductionmentioning

confidence: 99%

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Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Liu

Zhang

et al. 2013

Applied Geochemistry

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Section: Climate (Temperature and Runoff) As A Main Control On Chemicsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Liu

Zhang

et al. 2013

Applied Geochemistry

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“…The Curuaí floodplain is formed by quaternary sandy sediments with more than 30 lakes interconnected with each other and permanently connected to the Amazon River by channels (Moreira-Turcq et al, 2004;Dosseto et al, 2006). Flooding extension can vary from 1,340 to 2,000 km² depending on the water level.…”

Section: Study Areamentioning

confidence: 99%

Water quality changes in floodplain lakes due to the Amazon River flood pulse: Lago Grande de Curuaí (Pará)

Affonso¹,

Barbosa²,

Novo³

2011

Braz. J. Biol.

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Assurance of water quality for human consumption is essential for public health policies. In the Amazon floodplain, the seasonal water level variation causes periodic flooding of marginal areas that are usually used for settlements, agriculture and livestock. Therefore, the exchange of materials between the terrestrial and aquatic ecosystem affects the proportion of suspended and dissolved components in water and its physical-chemical characteristics, and consequently the quality of the water used by local people. Following this approach, the aim of this study is to evaluate changes in water quality in Lago Grande de Curuaí floodplain, Óbidos, Pará in response to the flood pulse, during one hydrological year from 2003 to 2004, based on water use classes (according to National Water Agency 357/2005 resolution) using chlorophyll-a and dissolved oxygen concentration as parameters and the eutrophication index. Ordinary kriging was applied to interpolate chlorophyll-a and dissolved oxygen and to predict values at non sampled locations. Each location was then classified according to water use acceptable parameters and to Carlson Trophic State Index modified by Toledo to map lake water classes and trophic status. The result showed that Lago Grande de Curuaí floodplain is a supereutrophic system, with levels of dissolved oxygen and chlorophyll-a not suitable for human supply during the receding water phase. These areas are located near the riverine communities, which can cause health problems due to the presence of potentially toxic algae. Therefore, monitoring water quality in Amazon lakes is essential to ensure the availability has appropriate quality for human and animal supplies.Keywords: Amazon várzea, chlorophyll-a, dissolved oxygen, eutrophication index, seasonality.Mudanças na qualidade da água nos lagos de planície de inundação em função do pulso de inundação do rio Amazonas: lago Grande de Curuaí, Pará ResumoA garantia da qualidade da água para consumo humano é essencial para as políticas de saúde pública. Na planície Amazônica a variação sazonal do nível de água provoca inundações periódicas das áreas marginais que são normalmente utilizadas para os assentamentos humanos, a agricultura e a pecuária. Portanto, a troca de materiais entre os ecossistemas terrestres e aquáticos afeta a proporção de componentes em suspensão e dissolvidos na água e suas características físico-químicas, o que, consequentemente, afeta a qualidade da água utilizada pela população local. Seguindo essa abordagem, o objetivo deste trabalho é avaliar as mudanças na qualidade da água na planície de inundação do lago Grande de Curuaí, Óbidos, Pará, em função do pulso de inundação, durante um ano hidrológico de 2003 a 2004, tendo por base tanto as classes de uso da água (de acordo com a Resolução nº 357/2005 da Agência Nacional de Água), usando como parâmetros tanto a concentração de clorofila-a e o oxigênio dissolvido, quanto o índice de eutrofização. Utilizou-se o método de krigagem para interpolar os dados de clorofila-a e de oxig...

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“…The dry and wet seasons are clearly separated in southern Taiwan, with precipitation being sparse from November to April (NE monsoon season), and only when SW monsoon prevails from May to October that precipitation is elevated in southern Taiwan. This may have an effect on changing the water chemistry of river waters, as weathering and erosion rates vary with different precipitation rates and river discharge (Dosseto et al 2006;Moon et al 2007). As a result of the distinct regional precipitation pattern, the variability of river discharge in each of the rivers in northern Taiwan is less than that in the central and southern parts of the island.…”

Section: Hydrology and Nutrientsmentioning

confidence: 99%

Spatial and Temporal Distribution of Trace Metals (Cd, Cu, Ni, Pb, and Zn) in Coastal Waters off the West Coast of Taiwan

Jiann¹,

Wen²,

Wei³

2014

Terr. Atmos. Ocean. Sci.

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Surface water samples were collected along the west coast of Taiwan during two expedition cruises which represent periods of different regional climatic patterns. Information on hydrochemical parameters such as salinity, nutrients, suspended particulate matter (SPM), and Chlorophyll a concentrations were obtained, and dissolved and particulate trace metal (Cd, Cu, Ni, Pb, and Zn) concentrations were determined. Spatial variations were observed and the differences were attributed to (1) influence of varying extents of terrestrial inputs from the mountainous rivers of Taiwan to the coast, and (2) urbanization and industrialization in different parts of the island. Geochemical processes such as desorption (Cd) and adsorption to sinking particles (Pb) also contributed to the variability of trace metal distributions in coastal waters. Results showed temporal variations in chemical characteristics in coastal waters as a consequence of prevailing monsoons. During the wet season when river discharges were higher, the transport of particulate metals was elevated due to increased sediment loads. During the dry season, lower river discharges resulted in a lesser extent of estuarine dilution effect for chemicals of anthropogenic sources, indicated by higher dissolved concentrations present in coastal waters associated with slightly higher salinity.

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Time scale and conditions of weathering under tropical climate: Study of the Amazon basin with U-series

Cited by 127 publications

References 60 publications

Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Water quality changes in floodplain lakes due to the Amazon River flood pulse: Lago Grande de Curuaí (Pará)

Spatial and Temporal Distribution of Trace Metals (Cd, Cu, Ni, Pb, and Zn) in Coastal Waters off the West Coast of Taiwan

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