Version 2 NSF network data:
Version 2 NSF network data from Summit have been introduced in the publication
Documentation for Summit
Bernhard, G., C. R. Booth, and J. C. Ehramjian. (2008). Comparison of UV irradiance measurements at
Summit, Greenland; Barrow, Alaska; and South Pole, Antarctica, Atmos. Chem. Phys., 8, 4799–4810.
The publication is available
A comprehensive uncertainty budget of the SUV-150B spectroradiometer at Summit is available
Further information on the system can be found
in the paper:
Wuttke S., G. Seckmeyer, G. Bernhard, J. Ehramjian, R. McKenzie, P. Johnston, and M. O'Neil. (2006).
New spectroradiometers complying with the NDSC standards, J. Atmos. Ocean. Tech., 23(2), 241–251.
The following remarks should be taken into consideration when using Summit data
of Volumes 14 - 16 (2004-2007):
- Influence from local smoke
Smoke from the station's power plant was sometimes moving over the instrument and
partially blocked the solar beam. This led to short-term (time constant < 1 second) variations
in measured spectra. Fluctuations in irradiance can be as high as ±20%. Most spectra affected by the smoke have been flagged,
but it is likely that some contaminated spectra are still part of the unflagged data set.
- Parameters for modeling
Model spectra complementing measurements were calculated with background aerosol conditions. Aerosol extinction was parameterized with Ångström's turbidity formula.
The parameters alpha and beta were set to 1.0 and 0.008, respectively. This translates to an aerosol
optical depth of 0.016 at 500 nm. This value is about the lowest aerosol optical depth that can be expected at Summit.
Actual values are higher most of the time.
Surface Albedo was set to 0.97.
- Ozone profiles
The vertical distribution of total ozone is based on ozone sonde measurements performed by NOAA/ESRL/GMD.
For more information contact us.