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South Pole Site Characteristics. Altitude: 2,800m (9,300 ft) Surface pressure: 650-680 mb Average winter time temperature: -58 C (-72F) Average winter time windspeed: 6m/s (12 kts) Peak recorded windspeed: 22m/s (45 kts) Median winter time precipitable water vapor column: 0.28mm
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SouthPole Site Characteristics Altitude: 2,800m (9,300 ft) Surface pressure: 650-680 mb Average winter time temperature: -58 C (-72F) Average winter time windspeed: 6m/s (12 kts) Peak recorded windspeed: 22m/s (45 kts) Median winter time precipitable water vapor column: 0.28mm Deep inversion layer is common in winter 1 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Raw data from May 17, 1995 Radiosonde ascent 2 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Water Vapor Column Annual Cycle From T indications assuming saturation From RH indications Data averaged from years 1961-1999 Ref: Chamberlin, R. A. 2001, JGR-Atmos. 106, 20101 3 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Water vapor column from three submm-sites Ref: Lane, A.P. 1998, in ASP Conf. Ser. 141, 289 4 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Opacity from skydips (492GHz) Increasing Water Vapor Tsky(K) = T0 + h*Tatm(1-exp(-to*Airmass)) Ref: Chamberlin, R.A., Lane A. P., Stark, A. A. 1997, ApJ, 476, 428 5 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Comparison of water vapor column to opacity Winter time interannual variation Ref: Chamberlin, R. A. 2002, in ASP Conf Ser. 266, 172 6 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Comparison of mm-wave opacity at three sites (225 GHz) Cumulative distribution Ref: Radford S. J. & Chamberlin, R. A. 2000, ALMA Memo 334.1 7 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Comparison of submm-wave opacity at three sites (~860GHz) Ref: Peterson J. B, Radford, S. J., et al. 2003, PASP, 115, 383 8 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
Comparison of submm-wave opacity stability at three sites (860 GHz) 9 Ref: Peterson J. B, Radford, S. J., et al. 2003, PASP, 115, 383 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.
THz atmospheric transmission Ref: Chamberlin, R. A., et al. 2003, in Proc. of SPIE 4885, 609 Chamberlin, R. A., Martin, C. L. 2003, in Proc of AMOS, MEDB, Kihei, Maui, HI 96753 10 mm/submm site properties. RAChamberlin, CSO. May 3, 2004.