Annually, the United Nations celebrates March 22nd as World Water Day. World Water Day celebrates water and raises awareness of the 2.2 billion people living without access to safe water. The day is about taking action to tackle the global water crisis, and remembering what a vital role water plays for all of humanity. This year, the theme of World Water Day is “SAVE OUR GLACIERS,” with a focus on glacier preservation. Therefore, no matter where we live, glaciers are critical to our water future.
“I don’t live near a glacier. Why should I care about glaciers?”
Glacier Facts: 70% of the Earth’s fresh water exists as snow or ice. Around 10% of the Earth’s land area is covered by glaciers or ice sheets.
Glaciers are part of the “cryosphere” which impacts every living being on the planet. The word “cryosphere” originates from the Greek word ‘kryos’ for frost or ice cold. The cryosphere extends across the globe and can appear seasonally (like snow in Iowa) or be permanently present in most parts of the world. The snow, glacier, permafrost, and frozen ground are significant storage and sources of freshwater, sustaining ecosystems and supporting livelihoods in and far beyond the regions where these are located. While you watch the video below you will learn about the cryosphere and how it’s changing.
Undeniably, all living beings depend directly or indirectly on the cryosphere. For example, as all major rivers originate from mountains, the mountain cryosphere plays an important role in providing and regulating freshwater resources for around half of the world’s population. Furthermore, alterations and loss of critical snow and ice are increasing the risk of other hazards.
The state of cryosphere is also a useful indicator for climate variability and change. Therefore, improved monitoring is critical to understand Earth’s weather, climate, and water cycles. The cryosphere, its changes, and its impacts have received increased attention in recent years, creating a demand for authoritative information on the state of the world’s snow and ice resources.
As shown above in the video, glaciers are extremely important to help regulate the earth’s temperature. Glaciers, snow, and ice reflect much of the sun’s radiation into space (keeping those areas cooler), unlike the bare ground or open ocean water, which absorb the radiation (making them warmer). Glaciers also store freshwater and are an essential part of the water cycle.
