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Conference Paper

Glacier feedback on Himalayan climate under global warming

Authors

Franco,  Salerno
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Guyennon,  Nicolas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Colombo,  Nicola
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Romano,  Emanuele
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Francesca,  Pellicciotti
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Franco, S., Guyennon, N., Colombo, N., Romano, E., Francesca, P. (2023): Glacier feedback on Himalayan climate under global warming, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2435


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018316
Abstract
Understanding Himalayan glacier’s response to a changing climate is vital because of their role as a water tower of the Asian sub-continent; however, great uncertainties still exist on the climate drivers of the past and present glacier changes and their dynamics across scales. We analyse the world’s longest time-series of climate station data at a glacierised elevation (Pyramid, Mt Everest) together with ground observations and climate reanalysis. We show that a cooling and drying in response to global warming occurred during the last three decades in the glacierised areas of the Himalaya. The counter-intuitive cooling is caused by enhanced katabatic winds resulting from higher ablation rates, which have also lowered the elevation of the local wind convergence diminishing precipitation in glacial areas, causing a further negative effect on glacier mass balance. While local cooling does not preserve glaciers from melting, it will protect the periglacial environment through this local negative feedback.