Declining snowfall is changing the seasonal patterns of streamflow throughout the Northern hemisphere boosting chances of water shortages in the summer, scientists have found.
Snowy areas in in the Rocky Mountains of North America, the European Alps and northern Europe are thawing prematurely as the Earth warms. Additionally, seasonal flows in less snowy areas are delayed as warm-season rain arrives later in the year becoming a more dominant source of river flow. Precipitation over winter is reduced., suggest a higher risk of summer droughts, which could adversely impact water and food security, ecosystem health, and hydropower generation.
"However, there were conflicting reports about these changes, with some places showing earlier peaks, some not changing, and some were later in the year." "Water managers need different strategies to adapt to this, depending on their location. Future planning for water infrastructure will need to take account of these changes in seasonal river flow."
Drought Research Floods Climate Environmental Issues Ecosystems Snow And Avalanches Global Warming
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