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ArtikelAn Active Subglacial Water System in West Antarctica Mapped from Space  
Oleh: Fricker, Helen Amanda ; Scambos, Ted ; Bindschadler, Robert ; Padman, Laurie
Jenis: Article from Bulletin/Magazine
Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 315 no. 5818 (Mar. 2007), page 1544.
Topik: Climate Change
  • Perpustakaan FK
    • Nomor Panggil: S01.K.2007.03
    • Non-tandon: 1 (dapat dipinjam: 0)
    • Tandon: tidak ada
    Lihat Detail Induk
Isi artikelSatellite laser altimeter elevation profiles from 2003 to 2006 collected over the lower parts of Whillans and Mercer ice streams, West Antarctica, reveal 14 regions of temporally varying elevation, which we interpret as the surface expression of subglacial water movement. Vertical motion and spatial extent of two of the largest regions are confirmed by satellite image differencing. A major, previously unknown subglacial lake near the grounding line of Whillans Ice Stream is observed to drain 2.0 cubic kilometers of water into the ocean over -3 years, while elsewhere a similar volume of water is being stored subglacially. These observations reveal a widespread, dynamic subglacial water system that may exert an important control on ice flow and mass balance.
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