Column | Name | Description |
---|---|---|
1 | Date |
Date and time assigned to the daily dose values. Date and time refer to
Greenwich Mean Time (GMT) and are encoded into a single number where the
integer part is the day number relative to January 1, 1900 (day 1
corresponds to 1/1/1900). The fractional part is the time of day. (For
example, the fractional part multiplied with 24 gives the hour of the
measurement). Time refers to approximate local solar noon (01:00z for
McMurdo Station; 16:00z for Palmer Station; 12:00z for South Pole
Station; 17:00z for Ushuaia; 20:00z for San Diego, and 21:00z for
Barrow). Integration boundaries for daily dose calculations are the
given time +/- 12 hours. For example: The daily dose for McMurdo
assigned to the Date/Time stamp 36826.04167 (i.e. 10/27/00 01:00 GMT) is
the integral of spectral irradiance between 10/26/00 13:00 GMT and
10/27/00 13:00 GMT.
Note: When the file is decoded by Microsoft Excel, the date value will automatically be translated into a correct date/time string, if the box "1904 date system" of the "Tools -> Options -> Calculation"-menu is unchecked. |
2 | Site | Site identifier: 1 = McMurdo Station; 2 = Palmer Station; 3 = South Pole Station; 4 = Ushuaia; 5 = San Diego; 6 = Barrow |
3 | Volume | Volume of data. Published data that has undergone full quality control is labeled by a single digit. The volume label of recent data, which has to be regarded as preliminary, includes the words "alpha" or "beta." |
4 | Minimum_Zenith | Minimum solar zenith angle occurring during solar scans of the integration period. |
5 | Maximum_Time_Gap | Maximum time gap in solar measurements during the integration period between sunrise and sunset in seconds. If the time-gap is larger than 15000 seconds, no doses are published. Gaps smaller than this limit are filled by spline interpolation. A description of the procedure can be found in Section 4.2.4 of Chapter 4, Volume 9 Operations Report. If the gap is larger than 7200 seconds (i.e. two hour) the data has to be treated with caution because the interpolated values may deviate significantly from the actual radiation levels. |
6 | E290to315 | Daily dose for the spectral integral 290 - 315 nm |
7 | E290to320 | Daily dose for the spectral integral 290 - 320 nm |
8 | E320to360 | Daily dose for the spectral integral 320 - 360 nm |
9 | E360to400 | Daily dose for the spectral integral 360 - 400 nm |
10 | E400to600 | Daily dose for the spectral integral 400 - 600 nm |
11 | E289_855to294_118 | Daily dose for the spectral integral 289.855 - 294.118 nm. Data is affected by noise and should not be used uncritically. |
12 | E294_118to298_507 | Daily dose for the spectral integral 294.118 - 298.507 nm |
13 | E298_507to303_03 | Daily dose for the spectral integral 298.507 - 303.03 nm |
14 | E303_03to307_692 | Daily dose for the spectral integral 303.03 - 307.692 nm |
15 | E307_692to312_5 | Daily dose for the spectral integral 307.692 - 312.5 nm |
16 | E312_5to317_5 | Daily dose for the spectral integral 312.5 - 317.5 nm |
17 | E317_5to322_5 | Daily dose for the spectral integral 317.5 - 322.5 nm |
18 | E322_5to327_5 | Daily dose for the spectral integral 322.5 - 327.5 nm |
19 | E327_5to332_5 | Daily dose for the spectral integral 327.5 - 332.5 nm |
20 | E332_5to337_5 | Daily dose for the spectral integral 332.5 - 337.5 nm |
21 | E337_5to342_5 | Daily dose for the spectral integral 337.5 - 342.5 nm |
22 | E342_5to347_5 | Daily dose for the spectral integral 342.5 - 347 .5 nm |
23 | Dose1 | Daily dose calculated from irradiance spectra that were weighted with the action spectrum for erythema defined by Komhyr, W.D., and L. Machta, "The Perturbed Troposphere of 1990 and 2020, 28 Feb - 3 March 1973", Vol. IV, CIAP, Dept. of Transportation, Wash. DC., 1973. |
24 | Dose2 | Daily dose calculated from irradiance spectra that were weighted with the action spectrum for erythema defined by Diffey, B.L., "A comparison of dosimeters used for solar ultraviolet radiometry," Photochemistry and Photobiology, 46, 55-60, 1987. |
25 | Dose3_CIE_Erythema | Daily dose calculated from irradiance spectra that were weighted with the action spectrum for erythema defined by McKinlay, A.F., and B.L. Diffey, CIE Research Note, 6, No.1, 1987). |
26 | Setlow | Daily dose calculated from irradiance spectra that were weighted with the action spectrum quantifying the potential of UV irradiance to cause damage to DNA as suggested by R. B. Setlow in "The wavelengths in sunlight effective in producing skin cancer: a theoretical analysis", Proc. Nat. Acad. Sci., USA, 71 , No. 9, pp. 3363-3366, 1974. |
27 | Hunter | Daily dose calculated from irradiance spectra that were weighted with the "Hunter"-action spectrum (Hunter, J.H., J.H. Taylor, and H.G. Moser, "The effect of ultraviolet irradiation on eggs and larvae of the northern anchovy, Engraulis mordax, and the pacific mackerel, Scomber japonicus, during the embryonic stage", Photochemistry and Photobiology, 29, 325-338, 1979). |
28 | Caldwell | Daily dose calculated from irradiance spectra that were weighted with the "Caldwell"-action spectrum (Caldwell, M. M., "Solar UV irradiation and the growth and development of higher plants," Photophysiology, 6, 131-177, 1971.) |