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gulkana glacier mass balance

The trends of climate change indicate that glacier melt will continue to increase. During 1997-2001, Gulkana Glacier showed a continued and accelerated negative mass balance trend, especially below the equilibrium line altitude where thinning was pronounced. 4A) was relocated at 2,020-m altitude in the eastern cirque of Gulkana Glacier. how glacier mass balance processes impact streamflow, ultimately improving our conceptual understanding of the future evolution of glacier runoff in continental and maritime climates. The Jarvis Glacier is located north of the Gulkana Glacier; a drilling project was conducted on the glacier in April 2017 (Miner et al., 2018). This map is of the same glacier depicted in the photos attached later in the lesson. West Gulkana Glacier is located in the eastern Alaska Range, only 8 km east of the Richardson Highway and Isabel Pass. [2] A glacier with a sustained negative balance is out of equilibrium and will retreat, while one with a sustained positive balance is out of equilibrium and will advance. Gulkana Glacier is located on the south side of the Alaska Range about 10 miles north of Paxson, along the Richardson Highway. water balance of Gulkana and Woverine Glaciers, Alaska, and South Cascade Glacier, Washington, 1965 and 1966 water years. The net mass balance on Gulkana Glacier, Alaska, U.S.A., has been measured since 1966 by the glaciological method, in which seasonal balances are measured at three index sites and extrapolated over large areas of the glacier. It is imperative that we understand and quantify how this will affect freshwater river runoff and downstream hydrology in order to better inform local response, policy, and resource management. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. 1). Will the glacier grow, or shrink? Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. These glaciers have the longest continuous mass-balance records in North America, with winter balance B w, summer balance B s, and annual balance B a data available from 1959 to 2011 for South Cascade Glacier (World Glacier Monitoring Service 2012, 2013) and from 1966 to 2015 for Wolverine and Gulkana Glaciers (O’Neel et al. K. Echelmeyer, M. Stuefer, and R. Flanders were instrumental in maintaining the mass balance program on Black Rapids Glacier during the 1990s and 2000s. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Tuesday, August 3, 2010. 2.1 Mass Balance Observations. C. For example, the balance year at Gulkana Glacier starts and ends in September of each year. Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. USGS began biannual measurements of glacier mass balance and meteorology at Alaska's Wolverine and Gulkana glaciers in … These glaciers have the longest continuous mass-balance records in North America, with winter balance Bw, summer balance Bs, and annual balance … S. O'Neel is acknowledged for providing the Gulkana Glacier mass balances, M. Huss for the Black Rapids ice thicknesses, and A. Arendt for computational resources and funding. Episodes of positive glacier-wide mass balance (greater than uncertainty) have modulated mass loss at Wolverine Glacier several times since the observations began (Fig. Systematic errors can accumulate linearly with time in this method. The net mass balance on Gulkana Glacier, Alaska, U.S.A., has been measured since 1966 by the glaciological method, in which seasonal balances are measured at three index sites and extrapolated over large areas of the glacier. The USGS has measured the mass balance on Gulkana Glacier since 1967 as part of a program to document long-term glacier and climate trends. of the Gulkana Glacier (from USGS database) Balance Year Winter Balance Summer Balance Net Balance 1966 0.93 1.03 -0.1 Results from South Cascade Glacier in Washington and Gulkana and Wolverine glaciers in Alaska provide the longest continuous record of North American glacier mass balance.

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