Progress on inorganic chemistry of glacial meltwater in the world
Glacial meltwater is a major carrier of nutrients and bioactive compounds,and meltwater chemistry is an important way to study the glacier drainage system and its dynamic characteristics to gain insights into the biogeochemical cycling process and explore the relationship between deglaciation and climate change.With accelerated melting of glaciers and increases in erosion and weathering,meltwater chemistry has undergone significant changes,which may have significant impacts on downstream water quality,the water environment,and ecosystems.In this study,the contents of inorganic chemical components and their spatial and temporal variations,solute sources and their proportions,and the relationship between chemical weathering and carbon cycling in global glacial meltwater were reviewed.The results indicated that meltwater chemistry is affected by various factors,such as the nature of the bedrock,the drainage system,the physical chemistry,and the topography and geomorphology.To provide references for future research on the relationships among the cryosphere,carbon cycle,and climate change,it is essential to strengthen simultaneous and continuous monitoring of hydrometeorological parameters and inorganic and organic chemical components in meltwater,evaluate the ecological and environmental effects of solutes sourced from glaciers,and examine the relationships among the coupled mechanisms of chemical weathering in glacial regions,solute mobilisation,and atmospheric CO2 balance.
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