Climatology of extreme downslope windstorms in the Russian Arctic

Шестакова, А. А.; Toropov, P. A.; Matveeva, Tatiana

doi:10.1016/j.wace.2020.100256

Cited by 13 publications

(23 citation statements)

References 40 publications

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“…We also considered a case study of strong winds on the W coast of Novaya Zemlya Island on 10 October 2012, as observed at Malye Karmakuly station. We had noted before that the highest wind speeds over the Eurasian Arctic are observed at Novaya Zemlya [96,97]. This region is characterized by the presence of bays, bights, rugged shores, and a 700 m + mountain range standing a few km inland.…”

Section: Discussionmentioning

confidence: 93%

High-Resolution COSMO-CLM Modeling and an Assessment of Mesoscale Features Caused by Coastal Parameters at Near-Shore Arctic Zones (Kara Sea)

Platonov

Kislov

2020

Atmosphere

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Coastal Arctic regions are characterized by severe mesoscale weather events that include extreme wind speeds, and the rugged shore conditions, islands, and mountain ranges contribute to mesoscale event formation. High-resolution atmospheric modeling is a suitable tool to reproduce and estimate some of these events, and so the regional non-hydrostatic climate atmospheric model COSMO-CLM (Consortium for Small-scale Modeling developed within the framework of the international science group CLM-Community) was used to reproduce mesoscale circulation in the Arctic coast zone under various surface conditions. Mid-term experiments were run over the Arctic domain, especially over the Kara Sea region, using the downscaling approach, with ≈12 km and ≈3 km horizontal grid sizes. The best model configuration was determined using standard verification methods; however, the model run verification process raised questions over its quality and aptness based on the high level of small-scale coastline diversity and associated relief properties. Modeling case studies for high wind speeds were used to study hydrodynamic mesoscale circulation reproduction, and we found that although the model could not describe the associated wind dynamic features at all scales using ≈3 km resolution, it could simulate different scales of island wind shadow effects, tip jets, downslope winds, vortex chains, and so on, quite realistically. This initial success indicated that further research could reveal more about the detailed properties of mesoscale circulations and extreme winds by applying finer resolution modeling.

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Section: Discussionmentioning

confidence: 93%

High-Resolution COSMO-CLM Modeling and an Assessment of Mesoscale Features Caused by Coastal Parameters at Near-Shore Arctic Zones (Kara Sea)

Platonov

Kislov

2020

Atmosphere

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“…This happened during the Novaya Zemlya bora with wind gusts up to 32 m s −1 . Vessel icing was also observed during downslope windstorms in Svalbard [27], despite the frequently occurring temperature rise (see Figure 1b and [13]), which should reduce possible icing.…”

Section: Introductionmentioning

confidence: 94%

“…A review on satellite observations of these winds is given in [11]. The climatology of these winds is summarized in [12,13]. According to station observations, the strongest downslope windstorms are observed on Novaya Zemlya and in Pevek (with gusts up to 50 m s −1 ), and the weakest on Svalbard [13].…”

Section: Introductionmentioning

confidence: 99%

“…The climatology of these winds is summarized in [12,13]. According to station observations, the strongest downslope windstorms are observed on Novaya Zemlya and in Pevek (with gusts up to 50 m s −1 ), and the weakest on Svalbard [13]. Downslope windstorms on Svalbard and Novaya Zemlya frequently occur with an easterly background flow (Figure 1a,d), although there are also downslope windstorms on the east coasts [4].…”

Section: Introductionmentioning

confidence: 99%

“…These downslope windstorms have not previously been considered in detail in terms of the accompanying weather hazards for transport, such as vessel icing and turbulence causing aviation hazards. Study areas: wind speed (color) composite maps for 5 episodes of strong downslope windstorms according to simulations (see Section 2.5) (a,d,g,j,m); topography cross-sections with the graphs showing temperature tendency frequency during downslope windstorms according to observations at stations (adopted from [13]) (b,e,h,k,n); mean potential temperature profile (ratio of potential temperature to potential temperature at the lowest level) in the incoming flow in the lowest 3-km layer according to CFSR reanalysis (see details in [13]) (c,f,i,l,o). Weather stations are shown with white points; empty arrows show the direction of the incoming flow.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the Risks of Vessel Icing and Aviation Hazards during Downslope Windstorms in the Russian Arctic

Шестакова

2021

Atmosphere

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Downslope windstorms are known sources of hazardous weather, such as severe gusty winds, rapid temperature changes, ship icing, strong turbulence and others, posing a great danger to people and infrastructure. This paper investigates the risks of ship icing and aviation hazards (rapid changes in the angle of attack and gust load factor) during downslope windstorms in five regions in the Russian Arctic based on observational data, reanalysis, and mesoscale numerical modeling. The highest frequency of ship icing was found during downslope windstorms downstream from Svalbard and Novaya Zemlya. Icing is rare during Tiksi and Wrangel Island downslope windstorms due to almost permanent sea ice cover during the cold season, while icing is absent during very warm Pevek downslope windstorm even in the ice-free conditions. Conditions for heavy icing are rather frequent (up to 5% of cases in winter) during Novaya Zemlya downslope windstorms and less frequent (up to 0.5% in spring) during Svalbard windstorm. The presence of downslope windstorms in those regions causes an increase in the maximum icing rate by about 2 times. Strong aviation turbulence hazardous for light aircraft is typical for all considered regions with downslope windstorms; it is observed mainly at an altitude of 1 to 4 km above the surface. Hazardous turbulence for jet aircraft like Boeing 737 on its cruising flight levels was found on Svalbard and in Tiksi region in 10–15% of cases during strong downslope windstorms.

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Integrating climate, air, and health goals: the impact of efficient cooling policies in India

Agarwal,

Phore,

Singh

et al. 2024

J Environ Stud Sci

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Climatology of extreme downslope windstorms in the Russian Arctic

Cited by 13 publications

References 40 publications

High-Resolution COSMO-CLM Modeling and an Assessment of Mesoscale Features Caused by Coastal Parameters at Near-Shore Arctic Zones (Kara Sea)

High-Resolution COSMO-CLM Modeling and an Assessment of Mesoscale Features Caused by Coastal Parameters at Near-Shore Arctic Zones (Kara Sea)

Assessing the Risks of Vessel Icing and Aviation Hazards during Downslope Windstorms in the Russian Arctic

Integrating climate, air, and health goals: the impact of efficient cooling policies in India

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