ASIS:Data pr

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DATA: Accumulation

METHOD: Microwave remote sensing and field evidence

ORIGINAL DATA:

ASIS FORMAT DATA:

ASCII FILE:

SOURCE: http://www.antarctica.ac.uk/bas_research/data/online_resources/snow_accumulation/ (last accessed 25/07/08)

REF: Arthern, R. J., D. P. Winebrenner, and D. G. Vaughan (2006), Antarctic snow accumulation mapped using polarization of 4.3-cm wavelength microwave emission, Journal of Geophysical Research-Atmospheres, 111(D6), d06107.

DATE ACQUIRED: 03/10/2007

CONDITIONS: Freely available from download site.

UNITS: mm yr-1 (w.e.)

ORIGINAL FORMAT: lat-long point locations

ORIGINAL RESOLUTION: approx 25.075 km

ORIGINAL PROJECTION: Geographic

PROCESSING: Point data reprojected to polar stereographic projection and gridded. Ordinary kriging was used to increase the spatial coverage of the data to ice shelf areas around the Amundsen Sea etc. The original data is preserved where it exists, otherwise the data is a result of the interpolation process. The grid was then masked using a 60 km buffer around the coastline dataset. The interpolated results beyond this length do not provide a realistic distribution. The dataset was then resampled to 5 km resolution using BILINEAR interpolation in ArcGIS.

COMMENTS:

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