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Sources of hydrochemistry and chemical weathering rate at Urumqi Glacier No.1 catchment in central Asia

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Názov: Sources of hydrochemistry and chemical weathering rate at Urumqi Glacier No.1 catchment in central Asia
Autori: Qin Yang, Xiangying Li, Donghui Shangguan, Tianding Han
Zdroj: Journal of Hydrology: Regional Studies, Vol 57, Iss , Pp 102107- (2025)
Informácie o vydavateľovi: Elsevier, 2025.
Rok vydania: 2025
Zbierka: LCC:Physical geography
LCC:Geology
Predmety: Meltwater runoff, Hydrochemistry, Cation denudation rate, Urumqi Glacier No.1, Physical geography, GB3-5030, Geology, QE1-996.5
Popis: Study area: Urumqi Glacier No.1 Catchment in central Asia. Study focus: Chemical weathering at the basin scale is important process for understanding the feedback mechanism of the carbon cycle and climate change. This study mainly used the actual sampling data in 2013, 2014, and 2016, and the first collection from the literature in same catchment to analyze the seasonal and interannual characteristics of meltwater runoff, as well as cation denudation rate (CDR). New hydrological insights for the study region: The dominant ions of meltwater runoff are Ca2 +, HCO3-, and SO42-, which are mainly derived from calcite dissolution, feldspar weathering and sulfide oxidation. Meltwater runoff at Urumqi Glacier No.1 has higher concentrations of Ca2+ and lower concentrations of HCO3- than that from glaciers in Asia. Compared to 2006 and 2007, cation concentrations increased in 2013 and 2014, while SO42- concentration decreased. The daily ion concentration has seasonality and exhibits a negative relationship with discharge. Daily CDR is positively related to discharge and temperature. Annual CDR values range from 12.34 to 19.04 t/km2/yr in 2013, 2014, and 2016, which are 1–1.7 times higher than those in 2006 and 2007 and higher than some glaciers in Asia. These results indicate that chemical weathering rate in the Urumqi Glacier No.1 catchment has increased with climate warming, and it is stronger than that of some glaciers in the Tibetan Plateau and surroundings.
Druh dokumentu: article
Popis súboru: electronic resource
Jazyk: English
ISSN: 2214-5818
Relation: http://www.sciencedirect.com/science/article/pii/S2214581824004567; https://doaj.org/toc/2214-5818
DOI: 10.1016/j.ejrh.2024.102107
Prístupová URL adresa: https://doaj.org/article/a640e047e5e14b49838c2ba2d6225243
Prístupové číslo: edsdoj.640e047e5e14b49838c2ba2d6225243
Databáza: Directory of Open Access Journals
Popis
Abstrakt:Study area: Urumqi Glacier No.1 Catchment in central Asia. Study focus: Chemical weathering at the basin scale is important process for understanding the feedback mechanism of the carbon cycle and climate change. This study mainly used the actual sampling data in 2013, 2014, and 2016, and the first collection from the literature in same catchment to analyze the seasonal and interannual characteristics of meltwater runoff, as well as cation denudation rate (CDR). New hydrological insights for the study region: The dominant ions of meltwater runoff are Ca2 +, HCO3-, and SO42-, which are mainly derived from calcite dissolution, feldspar weathering and sulfide oxidation. Meltwater runoff at Urumqi Glacier No.1 has higher concentrations of Ca2+ and lower concentrations of HCO3- than that from glaciers in Asia. Compared to 2006 and 2007, cation concentrations increased in 2013 and 2014, while SO42- concentration decreased. The daily ion concentration has seasonality and exhibits a negative relationship with discharge. Daily CDR is positively related to discharge and temperature. Annual CDR values range from 12.34 to 19.04 t/km2/yr in 2013, 2014, and 2016, which are 1–1.7 times higher than those in 2006 and 2007 and higher than some glaciers in Asia. These results indicate that chemical weathering rate in the Urumqi Glacier No.1 catchment has increased with climate warming, and it is stronger than that of some glaciers in the Tibetan Plateau and surroundings.
ISSN:22145818
DOI:10.1016/j.ejrh.2024.102107