. Ecological investigations of the tundra biome in the Prudhoe Bay region, Alaska . Temp ^C -10 Density, g cm-' 020 030 £ 40 4 20 A A ^ A A "'^: Fig. 7. Combined photo and data plot, 200 m east of pingo, M April 1972. the examples shown here, they are most com- monly at the top of the depth hoar layer. Later in the melt season ice layers form at the base of the depth hoar layer; at Prudhoe Bay in 1972 this did not occur until the end of May and during the first week of June. Similar timing for the formation of ice masses at the base of the snow was observed at Barrow and Prudhoe Bay
. Ecological investigations of the tundra biome in the Prudhoe Bay region, Alaska . Temp ^C -10 Density, g cm-' 020 030 £ 40 4 20 A A ^ A A "'^: Fig. 7. Combined photo and data plot, 200 m east of pingo, M April 1972. the examples shown here, they are most com- monly at the top of the depth hoar layer. Later in the melt season ice layers form at the base of the depth hoar layer; at Prudhoe Bay in 1972 this did not occur until the end of May and during the first week of June. Similar timing for the formation of ice masses at the base of the snow was observed at Barrow and Prudhoe Bay during the spring of 1973. "Unfortunately, a Rammsonde penetrometer was not available during these measurements. Typical Rammsonde profiles in tundra snow are available (Benson 1969), and a detailed study of the snow at Barrow using Ram hardness profiles was carried out during the 1972-1973 winter by Melchior and Benson.
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
