Western Finland Research Articles

Rural Inferno

This article addresses the impact of wildfires on rural peasant communities during the pre-modern period. It demonstrates how and when wildfires started, what was done to limit their occurrence, what economic and environmental consequences followed, and what social safety-nets existed. By using the case of Lower Satakunta (Western Finland) during the seventeenth century, the article reveals that the occurrence of wildfires was strongly correlated with agricultural methods, climate variability, and weather conditions. The environmental consequences often led to substantial loss of forest and agricultural lands and the economic consequences were often such that, without aid from the local community, the future existence of peasant households was impossible. Nevertheless, through the renewed medieval laws on fire support (Sw. brandstod), peasant communities were able to create socio-economic safety nets that helped them withstand and recover from fire disasters.

Characterization of Groundwater Geochemistry in an Esker Aquifer in Western Finland Based on Three Years of Monitoring Data

This study investigated the hydrogeochemistry of a shallow Quaternary sedimentary aquifer in an esker deposition in western Finland, where distinct spatial and temporal variability in groundwater hydrogeochemistry has been observed. Field investigation and hydrogeochemical data were obtained from autumn 2010 to autumn 2013. The data were analyzed using the multivariate statistical methods principal component analysis (PCA) and hierarchical cluster analysis (HCA), in conjunction with groundwater classification based on the main ionic composition. The stable isotope ratios of δ18O and δD were used to determine the origin of the groundwater and its connection to surface water bodies. The groundwater geochemistry is characterized by distinct redox zones caused by the influence of organic matter, pyrite oxidation, and preferential flow pathways due to different hydrogeological conditions. The groundwater is of the Ca-HCO3 type and locally of the Ca-HCO3-SO4 type, with low TDS, alkalinity, and pH, but elevated Fe and Mn concentrations, KMnO4 consumption, and, occasionally, Ni concentrations. The decomposition of organic matter adds CO2 to the groundwater, and in this study, the dissolution of CO2 was found to increase the pH and enhance the buffering capacity of the groundwater. The mobility of redox-sensitive elements and trace metals is controlled by pH and redox conditions, which are affected by the pumping rate, precipitation, and temperature. With the expected future increases in precipitation and temperature, the buffering capacity of the aquifer system will enhance the balance between alkalinity from bioactivity and acidity from recharge and pyrite oxidation.

No evidence of early life resource pulse effects on age-specific variation in survival, reproduction and body mass of female Siberian flying squirrels.

Understanding the diversity and causes of senescence patterns in the wild remains a challenging task, in particular among fast-living species for which senescence patterns have been poorly studied. Early life environmental conditions can shape senescence by influencing trade-offs between early and late life performance (disposable soma theory) or individual fitness through lifelong positive effects (silver spoon effects). Using a 23-year-long monitoring dataset of two populations of Siberian flying squirrels (Pteromys volans L.) in western Finland, we analysed the occurrence, onset and rate of senescence in female survival, body mass and reproductive performance. We also examined how early life pulsed resources (tree masting during the year of birth) influence age-specific variations in these traits. Our results indicate that survival senescence occurs after sexual maturity from 3 years of age. Females experiencing high resource availability at birth tended to survive better, but the age-specific trend was not affected by early life resource conditions. Maternal body mass declined slightly with age, starting at 4 years, regardless of early resource conditions. Similarly, among reproductive traits, we showed late-onset senescence in both litter size and annual reproductive probability, with no evidence supporting an effect of early life resources on these trends. We found no decline in juvenile body mass or in the juvenile size-number trade-off with maternal age. Our findings suggest that pulsed resources experienced at birth have a limited long-lasting impact on the life-history traits of this fast-living rodent, with no significant effect on senescence patterns.

Health screening and its association with emergency department visits and related costs among home-dwelling older adults

Background The aim of this study was to evaluate the effectiveness of the health screening procedure for home-dwelling older adults in reducing emergency department visits and associated costs. Methods Data were derived from health screenings from 2020 to 2021 for 75-year-old home-dwelling residents of Western Finland. The study compared emergency department visits and associated costs between older adults who participated in the health screening (intervention group) and those who did not (non-intervention group). For each older adult, three non-intervention controls were matched according to age, sex, health screening year and wellbeing service county. Emergency department visits and International Classification of Diseases (ICD)-10 codes from one year before to two years after health screening were analyzed. Results In the non-intervention group, a 19% increase in emergency visit rates was seen (457–564 per 1000 person-years), while the intervention group showed a 67% decrease (165–23). Annual costs for the non-intervention group increased from 148 euros (€) to €183, a mean ratio increase of 1.24 per person-year (range 1.08–1.40). In contrast, the intervention group’s costs decreased from €53 to €8, a mean reduction ratio of 0.15 per person-year (range 0.10–0.71). The intervention group had lower frequency of visits for respiratory and circulatory diseases but higher for digestive and metabolic diseases, unlike the non-intervention group. Conclusions The implementation of the health screening is an effective strategy for reducing both the frequency of emergency department visits and associated costs in home-dwelling older adults in good condition.

Simulating controlled drainage and hydrological connections in a cultivated peatland field

AbstractCultivated peatlands are increasingly regarded as hot spots due to climate change and other environmental concerns. Flexible water management, such as controlled drainage, is proposed to optimize cultivation and reduce environmental risks in peatland fields. The hydrological and environmental implications of controlled drainage depend on site‐specific variables, and it is unclear how controlled drainage should be implemented in various conditions. Simulation models are a promising approach to systemically study the field hydrology, as models can capture the complete water balance, which is difficult through experimental studies alone. We calibrated and validated the spatially distributed model FLUSH to describe the hydrology of a field block with a shallow peat cover and controlled drainage in central western Finland. The objectives were to analyze the hydrological effects of controlled drainage and detect hydrological connections between the field and an adjacent upslope forest area. The results showed how inflow from the forest can induce high observed drain discharge but impacted the block groundwater tables only in the proximity of the forest (distance <25 m). The effect of controlled drainage on groundwater tables was on average 0.15 m and seasonally varying. Controlled drainage reduced drain discharge, and the reduction was larger with the forest area included in the model. While controlled drainage effects on groundwater levels and soil moisture were insensitive to groundwater influxes from adjacent areas, the water balance impact highlights the role of hydrological connections in the hydrology of cultivated peatlands under controlled drainage.

Venesection conducted by physicians, barber-surgeons, bell-ringers and indigenous healers in Finland over 500 years. A narrative literature review with a limited genealogical search

Venesection was was a common medical procedure from ancient times to the 19th century, frequently performed by physicians and barber-surgeons. In Finland, priests, church bell-ringers, and indigenous healers also performed venesection for a variety of diseases, although without a medical basis. Venesection and its complications may have caused a number of deaths. The treatment was discredited due to increased criticism, which was substantiated by statistical evidence. Today, medical venesection performed by physicians is only an exceptional treatment for a few number of disorders. The purpose of this article is to is to shed light on the long and fascinating history of venesection in Finland from 1488 to 1976, as well as its role in the evolution of medical procedures. This will be achieved through a review of the literature, the introduction of some neglected sources, a register-based search, and an investigation into who conducted the surgery and why venesection persisted for so long in Finland. The sources consist of church records and scholarly literature. The novel and main finding of this study was that there were a large number of professionals doing venesection when there were few physicians. This study discovered 2,341 bell-ringer-phlebotomists in Finland between 1755 and 1877 who constituted the bulk of people conducting venesection as compared to barber-surgeons and physicians. This former group was made up of predominantly Swedish-named guys who lived in western Finland. Another novel finding was that patient safety legislation effectively reduced the indigenous practice of venesection by quacks.

Stable excess mortality in a multiple sclerosis cohort diagnosed 1970-2010.

Multiple sclerosis (MS) is associated with excess mortality. The use of disease-modifying treatments (DMTs) has recently been associated with survival benefits. A regional MS database was linked with national registries. People with MS (pwMS) diagnosed in 1971-2010 were included and followed up until the end of the year 2019. Five matched controls were acquired for every person with MS. DMTs included in the analyses were interferon and glatiramer acetate. Median follow-up time of the 1795 pwMS was 20.0 years (range 0.1-48.7 years). Survival did not differ between decades of diagnosis (p = 0.20). Amongst pwMS, male sex (adjusted hazard ratio [aHR] 1.70; 95% confidence interval [CI] 1.41-2.06), higher age at diagnosis (aHR 1.83; 95% CI 1.65-2.03 per 10-year increment) and primary progressive disease course (aHR 1.29; 95% CI 1.04-1.60) were independently associated with poorer survival. DMT use was associated with better survival (p < 0.0001) and better survival during follow-up (aHR 0.56; 95% CI 0.38-0.81). Compared to matched controls, median life expectancy was 8-9 years shorter in pwMS with survival diverging from controls during the first decade after diagnosis, more clearly in men than women. Despite DMT use being associated with better survival, relative life expectancy of pwMS did not change over five decades in Western Finland. Male sex was an independent risk factor for death amongst pwMS, but excess mortality was higher in women. More work and methods are needed to improve survival in pwMS.

Green hydrogen and wind synergy: Assessing economic benefits and optimal operational strategies

Volatile electricity prices have raised concerns about the economic feasibility of wind projects in Finland. This study assesses the economic viability and optimal operational strategies for integrating wind-powered green hydrogen production systems. Utilizing modeling and optimization, this research evaluates various wind farms in Western Finland over electricity market scenarios from 2019 to 2022, with forecasts extending to 2030. Key economic metrics considered include internal rate of return, future value, net present value (NPV), and the levelized cost of hydrogen (LCOH). Results indicate that integration of hydrogen production with wind farms shows economic benefits over standalone wind projects, potentially reducing LCOH to €2.0/kgH2 by 2030 in regular and low electricity price scenarios, and to as low as €0.6/kgH2 in high-price scenarios. The wind farm with the highest capacity factor achieves 47% reductions in LCOH and 22% increases in NPV, underscoring the importance of strategic site selection and operational flexibility.

Understanding the Intergenerational Impact of Migration: An Adult Mortality Advantage for the Children of Forced Migrants?

Children of immigrants often have excess mortality rates, in contrast to the low mortality typically exhibited by their parents' generation. However, prior research has studied children of immigrants who were selected for migration, thereby rendering it difficult to isolate the intergenerational impact of migration on adult mortality. We use semiparametric survival analysis to carry out a total population cohort study estimating all-cause and cause-specific mortality among all adult men and women from age of 17 years among all men and women born in 1953-1972 and resident in Finland in 1970-2020. We compare children of forced migrants from ceded Karelia, an area of Finland that was ceded to Russia during the Second World War, with the children of parents born in present-day Finland. Children with two parents who were forced migrants have higher mortality than children with two parents born in Northern, Southern, and Western Finland, but similar or lower mortality than the subpopulation of children whose parents were born in the more comparable areas of Eastern Finland. For women and men, a mortality advantage is largest for external causes and persists after controlling for socioeconomic factors. Our findings suggest that forced migration can have a beneficial impact on the mortality of later generations, at least in the case where forced migrants are able to move to contextually similar locations that offer opportunities for rapid integration and social mobility. The findings also highlight the importance of making appropriate comparisons when evaluating the impact of forced migration.

Agreement between self-reported and registered age at asthma diagnosis in Finland

IntroductionIn epidemiological studies, the age at asthma onset is often defined by patients’ self-reported age at diagnosis. The reliability of this report might be questioned. Our objective was to evaluate the agreement between self-reported and registered age at asthma diagnosis and assess features contributing to the agreement.MethodsAs part of the FinEsS respiratory survey in 2016, randomly selected population samples of 13,435 from Helsinki and 8000 from Western Finland were studied. Self-reported age at asthma diagnosis was compared to age at asthma diagnosis registered in the Finnish register on special reimbursement for asthma medication. The reimbursement right is based on lung function criteria according to GINA and Finnish guidelines. If the difference was less than 5 years, self-reported diagnosis was considered reliable. Features associated with the difference between self-reported and registered age at asthma diagnosis were evaluated.ResultsAltogether 197 subjects from Helsinki and 144 from Western Finland were included. Of these, 61.9% and 77.8%, respectively, reported age at diagnosis reliably. Median difference between self-reported and registered age at diagnoses was − 2.0 years (IQR − 9.0 to 0) in Helsinki and − 1.0 (IQR − 4.3 to 0) in Western Finland indicating earlier self-reported age at diagnosis. More reliable self-report was associated with non-allergic subjects and subjects who reported having asthma diagnosis more recently.ConclusionsAgreement between self-reported and registered age at asthma diagnosis was good especially with adult-onset asthma patients. Poor agreement in early-onset asthma could be related to delay in registration due to reimbursement criteria.

Interactive effects of agricultural landscape heterogeneity and weather conditions on breeding density and reproductive success of a diurnal raptor.

Agricultural intensification and climate change are serious threats toward animal populations worldwide. Agricultural intensification reduces the heterogeneity of agricultural habitats by diminishing crop variation and destroying microhabitats, such as small woody features, whereas the effects of climate change range from the growing frequency of weather extremes to disrupted prey-predator dynamics. We collected long-term ringing data from a population of Eurasian kestrels (Falco tinnunculus) located amidst agricultural areas in western Finland during 1985-2021, which we combined with density indices of their main prey species (voles), spatial data consisting of land cover classification of kestrel territories, and weather data, to study the effects of different environmental drivers on breeding density and success. We found that the density of inhabited nests rose with vole abundance and springtime snow depth, with the overall trend of population growth being stronger in areas with more heterogeneous landscapes. Clutch size was influenced negatively by the age of male parent and landscape heterogeneity, and positively by vole abundance, with rainfall having a negative influence conditional to other variables. Likewise, the number of produced fledglings was affected by male age, but it was additionally positively associated with landscape heterogeneity and its interaction with rainfall, with greater fledgling output in heterogeneous landscapes during high precipitation. The discrepancy between factors predicting large clutches and high numbers of fledglings suggests that while kestrels do not prefer heterogeneous landscapes when prospecting for territories, heterogeneous habitats provide better circumstances for foraging during the nestling period, which ensures nestling survival, particularly during adverse environmental conditions. Therefore, breeding in areas under intense agricultural use is more suboptimal to kestrels than their territory preferences would indicate. As changing climate may reduce prey availability and heighten the probability of weather extremities, agricultural intensification may lead to weaker reproductive success in densely populated farmland habitats.

Discharge of potentially toxic elements from acid sulfate soils in western Finland: Conflict between water protection and land use?

Acid sulfate soils (ASS) are commonly found in many coastal areas worldwide and typically develop from artificial draining of sulfidic sediments, which release acidity and metals, causing unfavuorable effects on recipient watercourses. This study estimates the actual amounts of metals and elements carried to the Gulf of Bothnia and the Baltic Sea by stream water yearly. The combined load from the many small streams and ditches was found to be proportionally high related to the size of their catchment, emphasizing the importance of including numerous small streams in the understanding of pollution in fresh water and marine environments. This study shows that Cd concentrations in the majority of the studied rivers exceed the Environmental Quality Standard set by the European Union (EU). This causes lowered ecological and chemical status according to the European classification system. Many potentially toxic elements discharge yearly to the Baltic Sea in large quantities from the study area: Thousands of tons of Al and Mn, tens of tons of Co, Cu and Ni, and hundreds of kg of Cd. A challenge for the estimation was irregular, or even missing, data for many rivers, which highlights careful planning of monitoring programs. While the current land use on ASS requires efficient drainage, the national and European strategies and legislation aim towards improved status in water bodies and forbid pollution of the environment. Therefore, the land use and water protection policy conflict.

Chemical and isotopic evidence to clarify the salinity of the bedrock groundwater at Finnish mining site

Study regionLithium mine in Ostrobothnia, Western Finland. Study focusClear anomalous electrical conductivity horizons and high salinity (Cl, Na, Ca) of groundwater were identified in several exploration boreholes. As these could not be explained thoroughly with geological variations, further studies on the origin of the anomalies were suggested. It was speculated that the abrupt rise in electrical conductivity shows a horizon of waters of different ages, the lower being either old brine, or having ancient marine origin. To understand the processes controlling the hydrochemistry and the evolution of the salinity of the groundwater, the hydrogeochemistry and isotopic composition (δ2H, δ18O, 87 Sr/86 Sr, 3 H, 14 C, δ13C) was analysed in 13 boreholes, two lakes, a test pit and a stream. New Hydrological insights for the regionThe isotope and geochemistry results indicate long residence times (up to 10,000 years BP), but no strong water-rock interaction and a typical Litorina SO4 layer is missing. The mismatching results could be explained by 1) the fact that even a small amount of ancient brine or ancient sea water mixing with fresh groundwater would affect water geochemistry, while the isotopic composition would stay immutable, or 2) the salinity originates from pre-Litorina SO4-poor brackish groundwater due to an earlier uplift from the Baltic Sea. Therefore, the groundwaters of the site are interpreted as a mixture of modern meteoric and fresh HCO3 water, brackish pre-Litorina subglacial groundwater, and glacial melt water.

Evaluation of the productivity and costs of excavator-based mechanized tree planting in Finland based on automated data collection

The poor cost-effectiveness of mechanized planting (MECP) is the main reason for the low mechanization rate of planting. In this study, we investigated the productivity of the mechanized excavator-based planting of Norway spruce (Picea abies [L.] H. Karst.) seedlings based on data collected by the Risutec Asta documentation system. We also compared the costs of a MECP chain with two different manual planting (MAP) chains, where mounding was carried out by a crawler excavator (EXC) or a continuously advancing mounder (CONT). The MECP of seedlings was carried out using an EXC equipped with a Risutec PM-1 60 planting device. Generally, the nine study sites in western Finland contained few surface obstacles (e.g., the logging residues had mainly been harvested), which made the conditions very suitable for MECP. The average production time taken by the MECP was 9 h ha-1. The operating hour (G15-h) productivity averaged 215 seedlings G15-h-1 , with the mean planting time being 13.8 s seedling-1. Loading 160 seedlings into the seedling cassette took approximately 10 min (3.8 s seedling-1). Overall, the cost of the MECP was about 5% lower than for the EXC + MAP. However, when productivity was set at &lt;200 seedlings G15-h-1 , the cost of the MECP was higher than that of the EXC + MAP. Based on our findings, the most cost-efficient planting chain was CONT + MAP. However, based on our results, the required level of productivity can be achieved if the sites are suitable for MECP and the machine operators are skilled.

Combining Residue and Macroscopic Use-wear Analysis of Quartz Objects in Kraakanmäki 3 Late Neolithic Settlement Site, Western Finland

Microscopic remains of plants, hairs, blood, bone, and sinew have been detected on Stone Age implements as evidence of the ways the tools were used. Together with use-wear analysis, microresidues enable us to obtain additional information of artefact biographies. However, the preservation of residues is not a straightforward issue. Although bones, plant matter, and wood have a tendency to decompose rapidly in acidic podzol soils, the acidity favours the preservation of keratinous tissues such as hairs and feathers. Because the analysis of microresidues has not been applied on Finnish quartz artefacts, this paper presents a preliminary testing of the method in a Late Stone Age settlement site in Kraakanmäki 3, western Finland. As a result, we found microscopic remains of hairs, feathers, and plants, which enable us to speak for the careful handling of quartz and stone tools at the excavations for further analyses.

Development of a Preventive Health Screening Procedure Enabling Supportive Service Planning for Home-Dwelling Older Adults (PORI75): Protocol for an Action Research Study.

In Finland, at least 1 in 4 residents will be >75 years of age in 2030. The national aging policy has emphasized the need to improve supportive services to enable older people to live in their own homes for as long as possible. This study aimed to develop a preventive health screening procedure for home-dwelling older adults aged 75 years to enable the use of clinical patient data for purposes of strategic planning of supportive services in primary care. The action research method was applied to develop the health screening procedure with selected validated health measures in cooperation with the local practicing interprofessional health care teams from 10 primary care centers in the Social Security Center of Pori, Western Finland (99,485 residents, n=11,938, 12% of them >75 years). The selection of evidence-based validated health measures was based on the national guide to screen factors increasing fall risk and the national functioning measures database. The cut-off points of the selected health measures and laboratory tests were determined in consecutive consensus meetings with the local primary care physicians, with decisions based on internationally validated measures, national current care guidelines, and local policies in clinical practice. The health screening procedure for 75-year-old residents comprised 30 measures divided into three categories: (1) validated self-assessments (9 measures), (2) nurse-conducted screenings (14 measures), and (3) laboratory tests (7 measures). The procedure development process comprised the following steps: (1) inventory and selection of the validated health measures and laboratory tests, (2) training of practical nurses to perform screenings for the segment of 75-year-old residents and to guide them to possible further medical actions, (3) creation of research data from clinical patient data for secondary use purposes, (4) secondary data analysis, and (5) consensus meeting after the pilot test of the health screening procedure for 75-year-old residents procedure in 2019 based on the experiences of health care professionals and collected research data. The developed preventive health screening procedure for 75-year-old residents enables the use of clinical patient data for purposes of strategic planning of supportive services in primary care if the potential bias by a low participation rate is controlled. DERR1-10.2196/48753.

After-use of cutover peatland from the perspective of landowners: Future effects on the national greenhouse gas budget in Finland

Recently, increased attention has been drawn to the greenhouse gas emissions of the Land use, Land use Change and Forestry (LULUCF) sector. In the Finnish LULUCF sector, the soil-originated emissions from the after-use of cutover peatland have become a more relevant question. This is due to the rapid increase in the number of former peat-harvesting sites, caused by the decline in the combustion of energy peat due to its high CO2 emissions. We conducted a nationally representative survey to study which after-use options of cutover peatlands are preferred by landowners. Based on the preferred after-use options, we estimated their impact on the national greenhouse gas emissions in the Finnish regions in 2035, and what factors influence the landowners’ choice of after-use options. We found that the four most popular after-use options for landowners were afforestation (71%), agriculture (24%), production of wind and solar power (22%) and rewetting (18%) when the respondent chose the three most attractive options. However, there were clear regional differences in the preferred after-use options, which might lead, if realized, to different soil-originated emissions at the regional level. The preferred after-use options could produce emissions of 0.35 million tonnes of carbon dioxide equivalent a year (Mt CO2 eq y−1) by 2035 in Finland. Most of these emissions (30.1%) would come from South Ostrobothnia in western Finland, mainly due to the indicated high interest in agricultural after-use. Most landowners prefer financially profitable after-use options, such as forestry, agriculture, as well as wind and solar energy production in cutover peatlands. However, environmentally oriented landowners favour many kinds of actions to support biodiversity, carbon sequestration, and water protection in cutover peatlands. It is crucial that economic productivity and the greenhouse gas sinks of cutover peatlands be considered simultaneously to meet the climate targets of the LULUCF sector in Finland.

Case Fatality of Aneurysmal Subarachnoid Hemorrhage Varies by Geographic Region Within Finland: A Nationwide Register-Based Study.

Previous studies have reported a substantial between-country variation in the case fatality rates (CFRs) of aneurysmal subarachnoid hemorrhage (SAH). However, contrary to comparisons among countries, nationwide comparisons within countries that focus on populations with equal access to health care and include out-of-hospital deaths in analyses are lacking. Thus, we aimed to investigate whether the SAH CFRs vary between geographic regions within Finland. We identified all hospitalized and nonhospitalized (sudden-death) cases with aneurysmal SAH in Finland during 1998-2017 through 2 externally validated nationwide registers. According to the municipality of residence, we divided the cases with SAH into 5 geographic regions: Southern, Central, Western, Northern, and Eastern Finland, each served by a University Central Hospital with a neurosurgical service. In addition to overall 30-day CFRs, we computed sudden death rates and 30-day CFRs after hospitalization for each region. Using logistic and Poisson regression models, we calculated regional age-adjusted, sex-adjusted, and year-adjusted odds ratios and annual percent changes with 95% CIs for CFRs. During 1998-2017, we identified a total of 9,443 cases with SAH, of which 3,484 (36.9%) occurred in Southern Finland. In comparison with the overall 30-day CFR of Southern Finland (35.1%), the age-adjusted, sex-adjusted, and study year-adjusted odds of SAH death were 32% (16%-50%) higher in Central Finland (42.7%), 39% (23%-58%) higher in Eastern Finland (43.4%), and 52% (33%-74%) higher in Western Finland (47.1%). The regional differences were present among both sexes, in all age groups, in sudden death rates, and in 30-day CFRs after hospitalization. Between 1998 and 2017, the overall 30-day CFRs decreased in Central (2.4% [1.0%-3.8%] per year) and Southern (1.2% [0.2%-2.2%] per year) Finland, whereas CFRs remained stable in the other regions. In the last 4 years of the study period (2014-2017), Southern Finland had the lowest 30-day CFR (16.5%) among hospitalized patients. SAH CFRs seem to vary significantly even within a country with relatively equal access to health care. Future studies with detailed individual-level data are needed to explore whether health inequities explain the reported findings.

Value of Spatially Distributed Rainfall Design Events—Creating Basin-Scale Stochastic Design Storm Ensembles

Current design storms used in hydrological modeling, urban planning, and dimensioning of structures are typically point-scale rainfall events with a steady rainfall intensity or a simple temporal intensity pattern. This can lead to oversimplified results because real rainfall events have more complex patterns than simple design series. In addition, the interest of hydrologists is usually in areal estimates rather than point values, most commonly in river-basin-wide areal mean rainfall estimates. By utilizing weather radar data and the short-term ensemble prediction system pySTEPS, which has so far been used for precipitation nowcasting, ensembles of high-resolution stochastic design storms with desired statistical properties and spatial structure evolving in time are generated. pySTEPS is complemented by adding time-series models for areal average rainfall over the simulation domain and field advection vectors. The selected study area is the Kokemäenjoki river basin located in Western Finland, and the model parametrization is carried out utilizing the Finnish Meteorological Institute’s weather radar data from the years 2013 to 2016. The results demonstrate how simulated events with similar large-scale mean areal rainfall can produce drastically different total event rainfalls in smaller scales. The sampling method, areal vs. gauge estimate, is also shown to have a prominent effect on total event rainfall across different spatial scales. The outlined method paves the way towards a more thorough and wide-spread assessment of the hydrological impacts of spatiotemporal rainfall characteristics.

P- and S-wave Seismic Imaging of a Complex Aquifer System in Kurikka, Western Finland

P- and S-wave Seismic Imaging of a Complex Aquifer System in Kurikka, Western Finland