Table 3. Diffuse attenuation coefficients (K d) at 305, 320, 340, and 380 nm wavelengths and for photosynthetically active radiation (PAR) in Hairlachersee (HAI), Oberer Plenderlesee (OPL), Schwarzsee ob Sölden (SOS), and, Rifflsee (RIF). Chl-a = specific seston MAAs in μg [μg Chl-a]−1 and the relative contribution of the different seston MAAs in % from HAI and RIF (study measurements) and from Laurion et al. (2002)1 for OPL and SOS. MG = mycosporine-glycine, SH = shinorine, PR= porphyra-334, PI = palythine, AS = asterina-330, US = usujirene, PE = palythene, n.d. = not determined.
| Lake | Date | Kd 305 (m−1) | Kd 320 (m−1) | Kd 340 (m−1) | Kd 380 (m−1) | Kd PAR (m−1) | Chl-a–specific seston MAAs (μg [μg Chl-a]−1) | MG (%) | SH (%) | PR (%) | PI (%) | AS (%) | US (1MAA-357) (%) | PE (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HAI | 21 Sep 2011 | 0.54 | 0.48 | 0.43 | 0.25 | 0.25 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. |
| 30 Sep 2010 | n.d. | n.d. | n.d. | n.d. | n.d. | 20.0 ± 4.5 | traces | 86 ± 0 | traces | 1±0 | 13 ± 0 | traces | traces | |
| OPL | 28 Jul 2004 | 0.29 | 0.24 | 0.17 | 0.12 | 0.15 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. |
| 121 Jul, 10 Oct 1998 | n.d. | n.d. | n.d. | n.d. | n.d. | 0.12–3.65 | — | 87–93 | — | 3-7 | traces–10 | — | — | |
| SOS | 5 Sep 2005 | 0.43 | 0.39 | 0.34 | 0.24 | 0.18 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. |
| 130 Jul 1998 | n.d. | n.d. | n.d. | n.d. | n.d. | 3.45 | traces | 71 | — | 22 | traces | 7 | traces | |
| RIF | 23 Aug 2010 | n.d. | n.d. | n.d. | n.d. | n.d. | 0.13 ± 0.1 | — | 49 ± 33 | 18 ± 13 | 1 ± 2 | — | 5 ± 12 | — |