globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.01.002
Scopus记录号: 2-s2.0-85012994444
论文题名:
Sedimentary record of recent climate impacts on an insular coastal lagoon in the Gulf of California
作者: Cuellar-Martinez T.; Ruiz-Fernández A.C.; Sanchez-Cabeza J.-A.; Alonso-Rodríguez R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 160
起始页码: 138
结束页码: 149
语种: 英语
英文关键词: 210Pb dating ; Anthropocene ; Climate variability ; Coastal lagoon sediments ; Gulf of California ; Inorganic geochemistry
Scopus关键词: Carbon ; Catchments ; Climatology ; Geochemistry ; Grain size and shape ; Lakes ; Lead ; Multivariant analysis ; Organic carbon ; Sedimentology ; Sediments ; Stratigraphy ; Trace elements ; <sup>210</sup>Pb dating ; Anthropocene ; Climate variability ; Coastal lagoons ; Gulf of California ; Inorganic geochemistries ; Climate change ; accumulation rate ; air temperature ; Anthropocene ; anthropogenic effect ; cesium isotope ; climate change ; climate variation ; coastal lagoon ; coastal landform ; coastal sediment ; fine grained sediment ; geochemistry ; lead-lead dating ; soil erosion ; trace element ; Baja California Sur ; Gulf of California ; Mexico [North America] ; Pacific Ocean ; San Jose Island
英文摘要: Sedimentary records are useful to evaluate environmental changes, either from natural or anthropogenic causes, such as global and climate change. The recent changes in accumulation rates and geochemical characteristics (grain size distribution, elemental composition, organic carbon and carbonate concentrations) recorded in a sediment core from San Jose Island Lagoon (SJIL, Gulf of California) were evaluated to determine its relationship with anthropogenic impacts and climatic variability. The 210Pb-derived chronology was corroborated with 239+240Pu and 137Cs stratigraphic markers. The mass accumulation rate increased up to ∼3 times during the past ∼100 years (0.16 ± 0.03 to 0.51 ± 0.06 g cm−2 yr−1). The contents of terrigenous and marine (salinity) indicator elements, as well as fine-grained sediments, also increased considerably, although no anthropization evidences were observed; indeed, the enrichment factor of trace elements indicated that the ecosystem is still a pristine environment. By using multivariate statistical techniques, we inferred that the larger input of fine-grained terrigenous sediments could be related to the enhancement of soil erosion from the catchment, under the influence of higher rainfall rates, especially during the last 20 years. In addition, the higher concentrations of salinity indicator elements most likely resulted from higher evaporation rates in the lagoon, caused by higher minimum atmospheric temperatures. We concluded that recent climate variability has become the main driver for sedimentary geochemical changes in San Jose Island Lagoon. These observations confirmed the usefulness of 210Pb-dated geochemical sediment records to study the impacts of recent climate variability where long-term environmental data is scarce or non-existent. © 2017 Elsevier Ltd
资助项目: This work was supported by the grants CONACYT 153492, PAPIIT-UNAM IN203313, IN112914 and PROMEP/103.5/13/9335, IAEA-ARCAL RLA/7/014. CONACYT provided the PhD fellowship to TCM (307783). The authors thank L Morquecho, E Calvillo Espinoza, J Angulo Calvillo, A González Peralta for their help during sampling work ; LH Pérez-Bernal, PG López-Mendoza and M Díaz-Asencio for their support in laboratory analysis ; G Ramírez Reséndiz, C Suárez, E Cruz Acevedo for data management and art work ; G. Cardoso-Mohedano and Eduardo de la Peña Gómez for retrieval of evaporation reanalysis data ; and D Oviedo and H Rojas for bibliographic research assistance.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59292
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作者单位: Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Unidad Académica Mazatlán, Mazatlán, Sinaloa, Mexico; Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán, Sinaloa, Mexico; Unidad Académica Procesos Oceánicos y Costeros, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, DF, Mexico

Recommended Citation:
Cuellar-Martinez T.,Ruiz-Fernández A.C.,Sanchez-Cabeza J.-A.,et al. Sedimentary record of recent climate impacts on an insular coastal lagoon in the Gulf of California[J]. Quaternary Science Reviews,2017-01-01,160
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