Ground-based atmospheric measurements at the Onsala Space Observatory (Sweden): data &amp; trends (2009–2025)

Mascaut, Faustine; Hammargren, Roger; Forkman, Peter

doi:10.5194/essd-18-2265-2026

Articles | Volume 18, issue 3

https://doi.org/10.5194/essd-18-2265-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-18-2265-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 3

Data description article

|

26 Mar 2026

Data description article |

| 26 Mar 2026

Ground-based atmospheric measurements at the Onsala Space Observatory (Sweden): data & trends (2009–2025)

Faustine Mascaut, Roger Hammargren, and Peter Forkman

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Cumulative views and downloads (calculated since 24 Oct 2025)

Month	HTML	PDF	XML	Total
Oct 2025	136	15	3	154
Nov 2025	59	20	12	91
Dec 2025	43	50	8	101
Jan 2026	81	34	10	125
Feb 2026	23	43	4	70
Mar 2026	45	37	7	89
Apr 2026	227	191	18	436
May 2026	244	50	9	303
Jun 2026	20	11	3	34
Jul 2026	65	25	3	93
Aug 2026	49	22	4	75
Sep 2026	104	46	55	205
Oct 2026	183	77	33	293
Nov 2026	38	19	7	64

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Short summary

We collected detailed weather measurements at the Onsala Space Observatory in Sweden from 2009 to 2025. The data show a clear warming, especially in winter, and less rainfall over time. Notable events include very cold winters in 2009–2011 and a warm winter in 2019–2020. This long record helps understand local climate change and supports future environmental research.