JY Spectrometer measurements of ozone and nitrogen dioxide from Arrival Heights
Ozone (O3) and nitrogen dioxide (NO2) are two trace gases in the stratosphere that interact to have an important effect on the radiation balance. The spatial and temporal variation in these gases (total column over time), whose quantities in the stratosphere are controlled by photochemistry and by horizontal and vertical transport processes are monitored annually with visible wavelength ... spectrometers. A spectrometer was installed at Arrival Heights and measurements are made using scattered light in the zenith sky when the solar zenith angle is between 80 and 96 degrees. A variety of instruments have been used since first measurements began and each instrument has been serviced and replaced at various intervals. The long term data set (raw data = times and recorded spectra of scattered light, derived = column amount of NO2 and O3) is analysed for trends impressed by solar cycle variability, quasi-biennial oscillation effects and volcanic perturbations. The system of scanning spectrometers at Arrival Heights was supplemented by a complete backup system (at Scott Base in January 1994) to minimise the chance of this long term record being broken.
The spectrophotometer data is submitted to the international Network for the Detection of Atmospheric Composition Change (NDACC). This public record is available through an anonymous ftp or by a clickable map linking sites with data directories.
NIWA's Antarctic atmospheric homepage
(Click for Interactive Map)
# GPS surface elevation profiles for the Amery Ice Shelf for various campaigns
# 1995, 1999, 2000, 2003, 2005/6
# The raw GPS data were collected under Australian Antarctic Science Advisory Committee (ASAC) funding
# to PI Richard Coleman.
# The data processing was as described in the paper below. Briefly, these are
# 1995: in Leica Ski software, ... relative to on ice base station, with
# coordinates determined relative to rock site at Beaver Lake
# subsequent: in Track (GAMIT/GLOBK) relative to base station with coordinates
# determined using GIPSY precise point positioning
# Coordinate files are in a format to allow easy crossover computations using the GMT supplementary routine
# x2sys_crossover using the geoz.def definition provided
# e.g., for GPS/GPS crossovers it would be
# x2sys_cross file1 file2 -TGEOZ -A0.2 -Ndk -Qe -Ia -V -2 -Ce -Wn6
# col1: time in days since 00:00 Jan 1, 2000. non-integer part of the day may just be a count by epoch rather than actual time.
# col2: lon (WGS84 deg)
# col3: lat (WGS84 deg)
# col4: height (WGS84 ellipsoidal elevation, after removal of ocean tides, ocean tide loading displacement, inverse barometer effect and permanent body tide). See note 1.
# Note 1: Corrections applied:
# 1. tides (TPXO6.2)
# 2. tidal loading displacement (TPXO6.2)
# 3. inverse barometer effect (IB corrections are relative to mean pressure (981.2hPa) at the Amery G3 AWS in 1999-2003).
# 4. permanent body tide was removed for compatibility to ICESat products (note that ICESat Release 428 products, not included here, are not conventionally on WGS84 ellipsoid so this correction may need to be applied to external datasets for compatibility). This was done by block shifting the GPS time series by -0.10 m
# Full details are provided in the paper below.
# in using these data please cite
King, M.A., R. Coleman, A. Freemantle, H.A. Fricker, R.S. Hurd, B. Legresy, L.
Padman and R. Warner 2009. A 4-decade record of elevation change of the Amery
Ice Shelf, East Antarctica. Journal of Geophysical Research, 114: F01010,
# Matt King, Dec 2012
These data are publicly available for download from the provided URL.
Data Set Progress
Excel, .llh, text
+61 3 6226 2108
+61 3 6224 0282
Richard.Coleman at utas.edu.au
Centre for Spatial Information Science
School of Geography and Environmental Studies
University of Tasmania
Private Bag 76
Province or State:
King, M.A., R. Coleman, A. Freemantle, H.A. Fricker, R.S. Hurd, B. Legresy, L. Padman and R. Warner (2009), A 4-decade record of elevation change of the Amery Ice Shelf, East Antarctica., Journal of Geophysical Research, 114, F01010, doi:doi:10.1029/2008JF001094
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