Observations of a deep-mixing event in Crater Lake, Oregon Public Deposited

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  • We present observations of the evolution of a deep-mixing event in a deep, temperate lake. The observations were obtained from thermistors mounted on a long-term mooring in the lake. The event seems to have originated near 150-m depth and resulted in a plume or layer of cold water from the upper half of the lake that descended to the lake bottom (590 m) over a 3-d period. Net mixing associated with this event resulted in an overall vertical heat exchange of nearly lO 15 J and a volume exchange of 0.7–3.2 km 3 (4–18% of the lake volume) between the upper and lower portions of the lake. The deep water displaced during the event is estimated to have carried 0.3–2.5 X l0 6 mol of nitrate to the upper lake, which accounts for a significant portion of the average annual nitrate flux (-2-4 X 10 6 mol yr-1) thought to be upwelled in this highly oligotrophic system.
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  • Crawford, G.B., and R.W. Collier. 1997. Observations of a deep-mixing event in Crater Lake, Oregon. Limnol. Oceanogr., 42(2), 299-306.
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  • Background; Methods; Results; Discussion
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  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2009-11-11T19:24:39Z No. of bitstreams: 1 LimnolOceanogr_42(2)_1997_299-306.pdf: 1512848 bytes, checksum: b31965140ccaa0c82badee3f0d8d868a (MD5)
  • description.provenance : Made available in DSpace on 2009-11-11T20:06:12Z (GMT). No. of bitstreams: 1 LimnolOceanogr_42(2)_1997_299-306.pdf: 1512848 bytes, checksum: b31965140ccaa0c82badee3f0d8d868a (MD5) Previous issue date: 1997
  • description.provenance : Approved for entry into archive by Linda Lamb(llamb@coas.oregonstate.edu) on 2009-11-11T20:06:12Z (GMT) No. of bitstreams: 1 LimnolOceanogr_42(2)_1997_299-306.pdf: 1512848 bytes, checksum: b31965140ccaa0c82badee3f0d8d868a (MD5)
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  • 0024-3590

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