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Much of the highlands of the reserve accumulate snow that typically does not melt in the summer, but instead compacts into ice and flows down glaciers and into the Arctic Ocean. In many instances, this occurs in the form of land-based glaciers, which terminate before reaching water, with ice melting into lakes or streams as it drains away. Glaciologists can monitor these glaciers for signs that their ends (termini) are retreating, a possible indicator of regional climate warming . In other instances, the glaciers reach the sea and flow out over the water, breaking apart as icebergs. Such glaciers are known as tidewater glaciers. In these glaciers, the terminus can retreat suddenly and may not reflect short-term regional climate change. Their movement is driven by complex processes related to the thickness of the ice and the depth of the water.
Original entry was from the NASA Earth Observatory; [1]