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Measurement of the characteristics of the intensity and polaristion of skylight at two different sites in Antarctica, differeing in albedo
Entry ID: K041_1992_1993_NZ_1


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Summary
Abstract: The enhancement of UVB radiation falling onto the different land surfaces was investigated. Previous measurements (in the 1990 season) found low maximum polarisation of sky light and strong low azimuth back scattered light as two characteristic features of the Antarctic skies. Analyses of these features suggested that this occurs by multiple reflections from the snow-ice surfaces surrounding the Tent Island measuring site (and most of Antarctica). To test the theory that the distinctive features of skylight over ice (and snow) is due to the high albedo environment, two sites at essentially the same latitude and the same unpolluted air were measured to determine if the land surface was what was affecting the results. Enhanced UVB radiation was measured, and hence the properties of Antarctic skies, at two sites, one near Tent Island and the other at Lake Vanda, the first site being surrounded by sea ice, while the second site was surrounded over a substantial distance by bare rock. Using a sky monitor and polarisation spectrometer, the polarisation and sky light distribution was measured at both sites.
Geographic Coverage
 N: -77.6833 S: -77.6833  E: 166.3833  W: 166.3833
 N: -77.53 S: -77.53  E: 161.55  W: 161.55

Temporal Coverage
Start Date: 1992-10-26
Stop Date: 1992-11-06


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > LAKE VANDA
CONTINENT > ANTARCTICA > WRIGHT VALLEY
CONTINENT > ANTARCTICA > TENT ISLAND
CONTINENT > ANTARCTICA > MCMURDO SOUND
GEOGRAPHIC REGION > POLAR


Science Keywords
ATMOSPHERE >ATMOSPHERIC RADIATION >TRANSMITTANCE    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >ULTRAVIOLET RADIATION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
GROUND STATIONS    [Information]


Data Set Progress
COMPLETE


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
DAVID BEAGLEHOLE
Role: INVESTIGATOR
Phone: +64 4 473 7749
Fax: +64 4 473 2686
Email: david.beaglehole at beaglehole.com
Contact Address:
Beaglehole Instruments Ltd
32 Salamanca Road
Kelburn
City: Wellington
Postal Code: 6012
Country: New Zealand


CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Publications/References
Beaglehole, D. And Carter, G.G. 1992. Antarctic skies I: Diurnal variations of the sky irradiance, and UV efects of the ozone hole, spring 1990. JGR Atmosphere D2, 97: 2589-2596.

Beaglehole, D. And Carter, G.G. 1992. Antarctic skies II: Characterisation of the intensity and polarisation of skylight in a high albedo environment. JGR Atmospheres D2, 97: 2597-2600.

Ryan, K. G., Beaglehole, D., Ultraviolet radiation and bottom-ice algae: laboratory and field studies from McMurdo Sound, Antarctica, in Ultraviolet Radiation in Antarctica: Measurements and Biological Effects Weiler, C. S. and Penhale, P. A., eds., American Geophysical Union, 1994, pp. 229-242.

Beaglehole, D. Wilson, P.W. 1993 Thickness and anisotropy of the ice-water interface. Journal of physical chemistry 97(42): 11,053-11,055

Beaglehole, D. Wilson, P. 1994 Extrinsic pre-melting at the ice-glass interface. Journal of physical chemistry 98(33): 8096-8100

Creation and Review Dates
DIF Creation Date: 2009-05-21
Last DIF Revision Date: 2009-06-06


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