Mika Rantanen

Mika Rantanen
Finnish Meteorological Institute · Weather and Climate Change Impact Research

Doctor of Philosophy

About

14
Publications
5,099
Reads
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193
Citations
Citations since 2017
12 Research Items
193 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
January 2016 - December 2019
University of Helsinki
Position
  • PhD Student

Publications

Publications (14)
Article
Full-text available
The Arctic is the region on Earth that is warming at the fastest rate. In addition to rising means of temperature-related variables, Arctic ecosystems are affected by increasingly frequent extreme weather events causing disturbance to Arctic ecosystems. Here, we introduce a new dataset of bioclimatic indices relevant for investigating the changes o...
Article
Full-text available
In recent decades, the warming in the Arctic has been much faster than in the rest of the world, a phenomenon known as Arctic amplification. Numerous studies report that the Arctic is warming either twice, more than twice, or even three times as fast as the globe on average. Here we show, by using several observational datasets which cover the Arct...
Article
Full-text available
Strong historical and predicted future warming over high-latitudes prompt significant effects on agricultural and forest ecosystems. Thus, there is an urgent need for spatially-detailed information of current thermal growing season (GS) conditions and their past changes. Here, we deployed a large network of weather stations, high-resolution geospat...
Preprint
Full-text available
Simultaneous heavy precipitation with high sea level can lead to more severe flooding than if the hazards occur individually. In recent years, the significance of compound flooding has gained attention in many coastal areas, but studies on compound flooding in Finland are still lacking. In this paper, we investigate the co-occurrence of heavy preci...
Preprint
Full-text available
In recent decades, the warming in the Arctic has been much faster than in the rest of the world, a phenomenon known as Arctic amplification (AA). Numerous studies report that Arctic is warming either twice, more than twice, or even three times as fast as the globe on average. However, the lack of consensus of AA definition precludes its precise qua...
Article
Full-text available
Satellite image of storm Aila on 17 September 2020 at 0900 utc. Storm Aila was a high‐impact autumn storm in Finland which was well predicted by medium‐range forecasts. The extreme winds caused by Aila established new Finnish records for the month of September. (Source: Finnish Meteorological Institute/EUMETSAT.)
Article
Full-text available
Little is known about how the structure of extra-tropical cyclones will change in the future. In this study aqua-planet simulations are performed with a full-complexity atmospheric model. These experiments can be considered an intermediate step towards increasing knowledge of how, and why, extra-tropical cyclones respond to warming. A control simul...
Article
Full-text available
Hurricane Ophelia was a category 3 hurricane which underwent extratropical transition and made landfall in Europe as an exceptionally strong post-tropical cyclone in October 2017. In Ireland, Ophelia was the worst storm in 50 years and resulted in significant damage and even loss of life. In this study, the different physical processes affecting Op...
Article
Full-text available
Little is known about how the structure of extra-tropical cyclones will change in the future. In this study aquaplanet simulations are performed with a full complexity atmospheric model. These experiments can be considered as an intermediate step towards increasing knowledge of how, and why, extra-tropical cyclones respond to warming. A control sim...
Article
Full-text available
In this article we investigate the heatwave of summer 2018 with a focus on Finland, using surface observations, radio soundings and reanalysis data. May and July 2018 were exceptionally warm, with both months setting new records for the highest national mean temperature. By contrast, June was not abnormally warm. In May 2018, the temperature anomal...
Article
Full-text available
The sensitivity of idealised baroclinic waves to different atmospheric temperature changes is studied. The temperature changes are based on those which are expected to occur in the Northern Hemisphere with climate change: (1) uniform temperature increase, (2) decrease of the lower level meridional temperature gradient, and (3) increase of the upper...
Article
Full-text available
A software package (OZO, Omega–Zwack– Okossi) was developed to diagnose the processes that af- fect vertical motions and geopotential height tendencies in weather systems simulated by the Weather Research and Forecasting (WRF) model. First, this software solves a gen- eralised omega equation to calculate the vertical motions as- sociated with diffe...
Article
Full-text available
A software package (OZO, Omega-Zwack-Okossi) was developed to diagnose the processes that affect vertical motions and geopotential height tendencies in weather systems simulated by the Weather Research and Forecasting (WRF) model. First, this software solves a generalized omega equation to calculate the vertical motions associated with different ph...

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