Simulations of the 2005, 1910, and 1876 Vb  cyclones over the Alps – sensitivity  to model physics and cyclonic moisture flux

Stucki, Peter; Froidevaux, Paul; Zamuriano, Marcelo; Isotta, Francesco Alessandro; Messmer, Martina; Martynov, Andrey

doi:https://doi.org/10.5194/nhess-20-35-2020

Articles | Volume 20, issue 1

Nat. Hazards Earth Syst. Sci., 20, 35–57, 2020

https://doi.org/10.5194/nhess-20-35-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Nat. Hazards Earth Syst. Sci., 20, 35–57, 2020

https://doi.org/10.5194/nhess-20-35-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 1

Research article

07 Jan 2020

Research article | 07 Jan 2020

Simulations of the 2005, 1910, and 1876 Vb cyclones over the Alps – sensitivity to model physics and cyclonic moisture flux

Peter Stucki et al.

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Feb 2020	76	9	3	88
Mar 2020	25	5	2	32
Apr 2020	25	8	1	34
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Nov 2020	14	8	1	23
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Jan 2021	27	10	0	37
Feb 2021	20	12	1	33
Mar 2021	14	9	0	23
Apr 2021	23	7	1	31
May 2021	16	7	1	24
Jun 2021	11	8	1	20
Jul 2021	12	9	0	21
Aug 2021	8	10	2	20
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Apr 2022	11	2	2	15
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Jul 2022	22	1	0	23
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Cumulative views and downloads (calculated since 06 Jun 2019)

Month	HTML	PDF	XML	Total
Jun 2019	149	32	1	182
Jul 2019	50	11	0	61
Aug 2019	20	6	0	26
Sep 2019	14	9	0	23
Oct 2019	10	5	1	16
Nov 2019	4	4	0	8
Dec 2019	13	6	0	19
Jan 2020	156	49	6	211
Feb 2020	76	9	3	88
Mar 2020	25	5	2	32
Apr 2020	25	8	1	34
May 2020	30	6	0	36
Jun 2020	38	12	1	51
Jul 2020	36	16	1	53
Aug 2020	51	8	4	63
Sep 2020	43	5	0	48
Oct 2020	39	8	1	48
Nov 2020	14	8	1	23
Dec 2020	10	13	0	23
Jan 2021	27	10	0	37
Feb 2021	20	12	1	33
Mar 2021	14	9	0	23
Apr 2021	23	7	1	31
May 2021	16	7	1	24
Jun 2021	11	8	1	20
Jul 2021	12	9	0	21
Aug 2021	8	10	2	20
Sep 2021	12	11	0	23
Oct 2021	18	42	0	60
Nov 2021	23	35	2	60
Dec 2021	13	8	2	23
Jan 2022	6	7	1	14
Feb 2022	14	4	1	19
Mar 2022	10	7	0	17
Apr 2022	11	2	2	15
May 2022	14	6	3	23
Jun 2022	7	6	3	16
Jul 2022	22	1	0	23
Aug 2022	94	4	0	98
Sep 2022	4	3	2	9
Oct 2022	7	2	0	9
Nov 2022	22	7	1	30
Dec 2022	14	6	1	21
Jan 2023	7	8	1	16

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Short summary

In 1876, 1910, and 2005, Switzerland was impacted by extreme rainfall and floods. All events were linked to a Vb cyclone. We test a range of weather model setups (short spinup and standard physics are best) to understand the sensitivity of atmospheric dynamics. The simulated Vb cyclones are (not) well defined for 2005 and 1910 (1876). To reproduce the events, intense moisture flux from the right direction is needed. Storms that slightly deviate from an ideal path produce erroneous precipitation.

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