Warming-Driven Enhanced Glacial Melt Fuels Trace Metal Mobilization from Mountain Glaciers and Ice Sheets

Abstract ID: 3.8460 | Accepted as Talk | Talk | TBA | TBA

Shipika Sundriyal (1)
shipika sundriyal (1)
(1) Northwest Institute of Eco-Environment and Resources, Donggwang road, 730000 lanzhou, CN

Categories: Cryo- & Hydrosphere
Keywords: trace elements, mobility, Biogeochemical cycling

Categories: Cryo- & Hydrosphere
Keywords: trace elements, mobility, Biogeochemical cycling

Glacier retreat, a consequence of climate warming, raises concerns about the release of trace elements (TEs) previously trapped within the ice. This study investigates the differential release patterns of TEs from mountain glaciers compared to ice sheets, a critical factor for assessment downstream ecological impacts. By comparing the TEs release patterns in meltwater from both glacier types, are observed a higher TEs mobility in mountain glaciers compared to ice sheets. Himalayan meltwater, in particular exhibits with high concentrations of micronutrients like zinc (Zn), potentially alleviating nutrient limitations downstream. However, increased release of bioavailable TEs, including Zn and copper (Cu), raises concerns about metal contamination. This phenomenon is attributed to faster meltwater runoff, varied bedrock geology, and in-creased physical erosion in mountain glaciers. While some released TEs may act as ben-eficial micronutrients for downstream ecosystems, the potential for increased transport of harmful elements like cadmium (Cd) necessitates careful consideration. These find-ings highlight the critical role of geographic context in TEs release. Understanding these dynamics is crucial for developing management strategies that address both potential benefits (nutrient supply) and risks (metal contamination) associated with TEs release from retreating glaciers.

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