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UV products
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lakkala
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March 8, 2016 - 9:17 am
Member Since: October 1, 2013
Forum Posts: 1
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Dear all,
Please find attached the summary of the answers of the UV product questionnaire.
Best regards,
Kaisa

We got 12 answers. Summary from Kaisa Lakkala 21.1.2015.

1. Are you interested in
a) UV doses, unit J/m²
2 yes
b) dose rates, unit W/m²
3 yes
CIE erythemally-weighted UV
c) spectra, unit W/m²/nm
8 yes
d) something else?
3 for daily integrals J/m2/nm
-integrals J/m2/nm divided in two:
sun rise ->midday
midday ->sun set

2. What would be the good time resolution
for
a) spectral data
- at least hourly
- 15-30 min
- continuous measurements

b) dose rates
-at least hourly

c) doses
-hourly
-one per day
-sun rise ->midday
-midday ->sun set

d) something else?
-all data available
-Minimum is 15 minute time resolution, but we could specify a more objective criterium from SZA changes in the morning/afternoon and the UV changes from that

-include midday UV measurement for each station into the schedule of the Brewers

3. Which action spectra would you like to use for the dose rates?
6 for -CIE erythemal
3 for -Vitamin D
2 for -new CIE 1998 action spectrum for erythema
-Generalized Plant (Caldwell 1971)
-DNA damage
-UVB
-UVA

-Here is our list of action spectra that we use: http://uv.biospherical.com/log.....ducts.html

-The action spectra that we apply to spectra submitted to NDACC include:
290-315 nm UVB (W m-2)
315-400 nm UVA (W m-2)
Erythemal UV (W m-2), CIE according to McKinlay and Diffey (1987)
DNA-weighted UV (W m-2), Bernhard and Seckmeyer (1997) formulation of Setlow (1974)
Generalised Plant (W m-2), Green et al. (1974) formulation of Caldwell (1971), normalized to 1 at 300 nm
Vitamin D production (W m-2), Bouillon et al. (2006), truncated at 315 nm
So if these spectra could be also part of the EUBREWNET database, that would be nice

We could maybe provide different action spectra through the database and let the users decide if and which one they would like to use. Then the database could maybe perform the weighting?

4. Do you need spectra, which are weighted with an action spectra (but not integrated over the wavelengths)?
2 No
2 Yes

5. Do you need some other UV quantities?
-Cloud modification factor
-Diffuse component
-Direct component
-summaries
-monthly means of 1a-b
-monthly and yearly sums of 1a-b

6. Something else?
- SZA for each wavelength
- cosine correction factor
- slit function of each instrument
- info of applied corrections, and how they are made
- Time step for each wavelength
- uncertainties in spectral values
- time available for every spectral measurement
- QA spectral state at the highest time available, and time-stamped for each data point

-Have a look at what we provide: http://uv.biospherical.com/Ver.....oducts.asp
Quality control information (see “Flags”), model spectra, direct measurements in addition to global measurements, plus data from ancillary sensors would all be useful.

-One important question is whether the spectral data could be made available for the UV plus VIS range (up to around 800 nm). Of course this goes out of the "UV scope" but it is well known that the effect of UV radiation on most organisms depends on interactions with UV-A and VIS radiation. So having the UV + VIS spectrum available would make it much more useful, say even, if the main data corpus is only UV, having at least some locations with data that includes VIS would be extremely useful.

-I am developing R packages for photobiology, we are using them in house and with a few collaborators, but the long-tern plan is to advertise them when they have been fully written and tested. If you are interested you can have a look at http://r4photobiology.wordpress.com/

-I like to download data from ftp sites, and I like ASCII data

-Freely available access to the data for scientific use

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