The numbers are in – we have the final results from the laboratory for the ISOSCAN citizen science snow and water sampling in 2025 (see result table at the bottom of the page). We are looking at 43 samples in total, and 42 of those have relevant information about time and location with them that makes the data useful for our scientific analysis.
The samples have been taken over a wide range of locations, from the region around Tromsø, to the border regions between Norway and Sweden, to Finse in Southern Norway, and Lillehammer. Elevation ranges from close to sea level up to 1537 m above sea level. One sample was even taken on the top of Gråtinden mountain, only accessible by narrow ridges! Dear ISOSCAN’ers, please sample responsibly and don’t take any risk during the sampling that you would not take anyways!
The water isotopes we measured in the sample also shows a wide range, from relatively small numbers of about -25 permil for δD to a quite negative value of around -150 permil. The smaller number is typical for snow that forms close to the coast, while the lowest values are found after the clouds have already lost a lot of water on the way inland.
Lastly, it is interesting to look at the d-excess parameter, which shows some pretty high numbers of around 30 permil from a number of samples. The high numbers for that parameter are typical for a ocean source of the water in the snow that is located close to the ice edge. It is interesting to see that there are no negative numbers in the d-excess of any of the measured samples. We consider this as a sign of the overall good quality of the samples, since negative values often indicate that samples have been leaking in some way, for example due to a cap that has not been properly closed.
We thank all ISOSCAN’ers for their great effort in collecting snow samples. Congratulations on getting in a first set of ISOSCAN samples with good quality. We’re now getting ready to scale up our efforts to a larger geographical region, and a longer time scale over the coming winter season (March-April 2026).
Snow (and runoff) samples from ISOSCAN sampled in March-August 2025 and analysed at FARLAB in 2025
| ISOSCAN'er | δD | δ18O | d-excess | Sampling time | Location | Lat | Lon | Elevation (m) | Type | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ISOSCAN-014 | -149.7 | -19.57 | 6.8 | 2024-04-15 15:00 | Kvitbergfjellet | 69.56342 | 18.55325 | 458 | snow | ||
| ISOSCAN-026 | -38.6 | -6.72 | 15.2 | 2025-04-06 19:45 | Setermoen | 68.85847 | 18.30344 | 95 | snow | ||
| ISOSCAN-037 | -41.9 | -7.57 | 18.7 | 2025-04-25 17:30 | Engenes | 69.5251 | 18.26712 | 8 | snow | ||
| ISOSCAN-038 | -67.1 | -9.91 | 12.1 | 2025-04-21 13:51 | Utstrand | 68.80934 | 16.10915 | 114 | snow | ||
| ISOSCAN-055 | -66 | -9.25 | 8 | 2025-04-18 13:45 | Hemavan | 65.81567 | 15.08551 | 460 | snow | ||
| ISOSCAN-065 | -51.6 | -8.27 | 14.5 | 2025-04-21 13:37 | Nakken | 68.81129 | 16.11466 | 128 | snow | ||
| ISOSCAN-073 | -84.2 | -12.04 | 12.1 | 2025-08-24 12:59 | Flakvassnutane | 60.63709 | 7.511966 | 1537 | water | ||
| ISOSCAN-077 | -39.9 | -8.66 | 29.4 | 2025-04-12 15:00 | Middagsskaret | 69.68222 | 18.68361 | 151 | snow | ||
| ISOSCAN-093 | -142.5 | -18.3 | 3.9 | 2025-04-19 16:10 | Røtinden | 69.70219 | 18.75254 | 474 | snow | ||
| ISOSCAN-101 | -50.6 | -9.69 | 27 | 2025-04-05 12:00 | Galggojavri | 69.1388 | 20.74616 | 505 | snow | ||
| ISOSCAN-108 | -37.8 | -8.61 | 31.1 | 2025-04-22 15:08 | Prestvannet | 69.65897 | 18.93517 | 95 | snow | ||
| ISOSCAN-128 | -24.1 | -4.95 | 15.5 | 2025-04-05 15:22 | Botnfjellet | 69.64398 | 18.65197 | 590 | snow | ||
| ISOSCAN-135 | -79 | -10.98 | 8.9 | 2025-08-24 10:32 | Finse | 60.61217 | 7.507118 | 1365 | water | ||
| ISOSCAN-152 | -78.3 | -10.39 | 4.8 | 2025-08-23 15:59 | Finsefetene | 60.58186 | 7.52967 | 1229 | water | ||
| ISOSCAN-162 | -122.8 | -16.71 | 10.9 | 2025-04-18 12:05 | Sjusjøen | 61.151729 | 10.727688 | 818 | |||
| ISOSCAN-165 | -75.3 | -11.92 | 20.1 | 2025-04-17 10:00 | Botnfjellet | 69.64258 | 18.6327 | 769 | snow | ||
| ISOSCAN-176 | -88.3 | -12.03 | 7.9 | 2024-04-10 19:17 | Storbogtinden | 69.71031 | 18.7376 | 543 | snow | ||
| ISOSCAN-177 | -75.1 | -11.04 | 13.2 | 2025-04-05 00:47 | Hattu | 69.271376 | 19.942423 | 6 | |||
| ISOSCAN-178 | -84 | -12.65 | 17.1 | 2025-05-04 08:55 | Tromsoøya | 69.6667 | 18.94881 | 117 | snow | ||
| ISOSCAN-180 | -69.4 | -9.82 | 9.1 | 2025-04-18 13:50 | Hemavan | 65.81456 | 15.08582 | 460 | snow | ||
| ISOSCAN-188 | -56.8 | -10.11 | 24.1 | 2024-04-09 22:15 | Straumsbukta | 69.57742 | 18.62999 | 3 | snow | ||
| ISOSCAN-195 | -29 | -5.67 | 16.4 | 2025-04-04 00:00 | Skibotn | 69.345492 | 20.331795 | 80 | |||
| ISOSCAN-200 | -56.7 | -10.67 | 28.6 | 2025-04-12 10:52 | Ullstinden | 69.77574 | 19.61798 | 683 | snow | ||
| ISOSCAN-204 | -24.2 | -6.6 | 28.6 | 2025-03-21 13:20 | Nakken | 68.80736 | 16.1117 | 128 | snow | ||
| ISOSCAN-207 | -77.8 | -10.83 | 8.8 | 2025-04-19 13:00 | Gråtinden | 69.57435 | 18.49244 | 862 | snow | ||
| ISOSCAN-211 | -57.8 | -8.86 | 13 | 2025-05-15 08:15 | Lomvasshaugen | 69.68152 | 18.73848 | 28 | snow | ||
| ISOSCAN-214 | -122.9 | -16.11 | 5.9 | 2025-04-20 14:15 | Golddajarvri | 69.05993 | 20.54704 | 490 | snow | ||
| ISOSCAN-234 | -32.7 | -5.37 | 10.2 | 2025-04-13 10:57 | Mellafjellet | 69.7196 | 18.86532 | 451 | snow | ||
| ISOSCAN-238 | -43.7 | -8.96 | 28.1 | ||||||||
| ISOSCAN-241 | -23.4 | -4.45 | 12.2 | 2025-06-04 17:21 | Bukkemyrvatnet | 68.66546 | 17.84294 | 420 | |||
| ISOSCAN-247 | -53.9 | -8.83 | 16.7 | 2025-05-08 14:00 | Storklova | 69.78926 | 18.53838 | 141 | snow | ||
| ISOSCAN-022 | -96.8 | -12.99 | 7.1 | 2025-04-26 14:30 | Dyptjørne | 60.54675 | 7.94533 | 1325 | snow | ||
| ISOSCAN-239 | -45.5 | -8.33 | 21.1 | 2025-04-04 10:45 | Hestefjellet | 69.70574 | 18.81717 | 498 | snow | ||
| ISOSCAN-240 | -116 | -15.67 | 9.3 | 2025-04-19 17:00 | Monsbunuten | 60.45541 | 7.93081 | 1214 | snow | ||
| ISOSCAN-118 | -46.8 | -7.1 | 10 | 2025-04-26 15:53 | Totland | 60.32075 | 5.40883 | 134 | water | ||
| ISOSCAN-127 | -86.5 | -12.18 | 10.9 | 2025-09-09 12:00 | Valdresflye | 61.39036 | 8.79235 | 1381 | water | ||
| ISOSCAN-090 | -82 | -11.72 | 11.7 | 2025-09-06 15:00 | Gilafjellet | 61.06751 | 8.7064 | 1125 | water | ||
| ISOSCAN-084 | -85.3 | -11.19 | 4.2 | 2025-07-07 00:00 | Bukono | 61.16356 | 9.20165 | 909 | water | ||
| ISOSCAN-236 | -86.2 | -12.09 | 10.6 | 2025-09-09 12:00 | Beitostølen | 61.27208 | 8.86179 | 1051 | water | ||
| ISOSCAN-057 | -78.1 | -11.11 | 10.8 | 2025-09-07 16:30 | Valtjernstølen | 60.93703 | 8.98637 | 992 | water | ||
| ISOSCAN-139 | -81.9 | -11.54 | 10.5 | 2025-09-09 10:08 | Bygdin | 61.3306 | 8.79136 | 1057 | water | ||
| ISOSCAN-182 | -82.4 | -11.3 | 8 | 2025-09-07 00:00 | Rabalen | 61.14197 | 9.244 | 923 | water | ||
| ISOSCAN-096 | -74.9 | -10.15 | 6.3 | 2025-09-07 17:30 | Valtjernstølen | 60.94996 | 8.98575 | 1001 | water |