Niilo Ryti

M.D, PhD, Docent
Epidemiology and Environmental Emergency Medicine

Faculty of Biochemistry and Molecular Medicine

I am an active scientist and a clinician with a long-standing interest in environmental emergency medicine, climate change and disaster medicine.

Research interests

Researcher information

Researcher profiles

Scientific merits

Alahmad B, et al. Associations Between Extreme Temperatures and Cardiovascular Cause-Specific Mortality: Results From 27 Countries. Circulation. 2022; 146:00-00.
Nottmeyer L, et al. The association of COVID-19 incidence with temperature, humidity, and UV radiation – A global multi-city analysis. Science of the Total Environment. 2022; 854(1):158636.
Choi HM, et al. Effect modification of greenness on the association between heat and mortality: A multi-city multi-country study. eBioMedicine 2022; 84:104251.
Liu C, et al. Coarse Particulate Air Pollution and Daily Mortality: A Global Study in 205 Cities. American Journal of Respiratory and Critical Care Medicine. 2022; 206(8):999-1007.
Wu Y, et al. Global, regional, and national burden of mortality associated with short-term temperature variability from 2000–19: a three-stage modelling study. Lancet Planetary Health. 2022; 6(5):e410-e421.
Lavigne E, et al. Short-term exposure to ambient air pollution and individual emergency department visits for COVID-19: a case-crossover study in Canada. Thorax. 2022; 0:1-8.
Ryti NRI, et al. Cold Weather and Cardiac Arrest in 4 Seasons: Helsinki, Finland, 1997‒2018. American Journal of Public Health. 2022; 112(1):107-115.
Masselot P, et al. Differential Mortality Risks Associated With PM2.5 Components: A Multi-Country, Multi-City Study. Epidemiology. 2022; 33(2):167-175..
Mistry M, et al. Comparison of weather station and climate reanalysis data for modelling temperature-related mortality. Scientific Reports. 2022; 12:5178.
Tobías A, et al. Geographical Variations of the Minimum Mortality Temperature at a Global Scale: A Multicountry Study. Environmental Epidemiology. 2021; 5(5):e169.
Chen G, et al. Mortality risk attributable to wildfire-related PM2.5 pollution: a global time series study in 749 locations. Lancet Planetary Health. 2021 Sep; 5(9):e579-e587.
Vaičiulis V, et al. Association between winter cold spells and acute myocardial infarction in Lithuania 2000–2015. Scientific Reports. 2021; 11:17062.
Heibati B, et al. Weather Conditions and COVID-19 Incidence in a Cold Climate: A Time-Series Study in Finland. Frontiers Public Health. 2021; 8:605128.
Jaakkola JJK, et al. Airborne pollen concentrations and daily mortality from respiratory and cardiovascular causes. European Journal of Public Health. 2021 Oct 11; 31(4):722-724.
Zhao Q, et al. Global, regional, and national burden of mortality associated with non-optimal ambient temperatures from 2000 to 2019: a three-stage modelling study. Lancet Planetary Health. 2021; 5(7):e415-e425. [Top 10th climate paper in 2021 for news and media attention by Carbon Brief]
Vicedo-Cabrera AM, et al. The burden of heat-related mortality attributable to recent human-induced climate change. Nature Climate Change. 2021; 11(6):492-500. [Top 1st climate paper for 2021 for news and social media attention by Carbon Brief]
Sera F, et al. A cross-sectional analysis of meteorological factors and SARS-CoV-2 transmission in 409 cities across 26 countries. Nature Communications 2021; 12:5968.
Urban A, et al. Evaluation of the ERA5 reanalysis-based Universal Thermal Climate Index on mortality data in Europe. Environmental Research. 2021; 198:111227.
Chen K, et al. Ambient carbon monoxide and daily mortality: a global time-series study in 337 cities. Lancet Planet Health. 2021; 5(4):e191-e199.
Meng X, et al. Short term associations of ambient nitrogen dioxide with daily total, cardiovascular, and respiratory mortality: multilocation analysis in 398 cities. BMJ. 2021; 372:n534.
Madaniyazi L, et al. Seasonal variation in mortality and the role of temperature: a multi-country multi-city study. International Journal of Epidemiology. 2021; 51(1):122-133.
Hintsala HE, et al. Central aortic hemodynamics following acute lower and upper‑body exercise in a cold environment among patients with coronary artery disease. Scientific Reports. 2021; 11:2550.
Lee W, et al. Projections of excess mortality related to diurnal temperature range under climate change scenarios: a multi-country modelling study. Lancet Planetary Health. 2020; 4: e512–21.
Balogun HA, et al. Effects of Air Pollution on the Risk of Low Birth Weight in a Cold Climate. Appl Sci. 2020; 10(18):6399.
Ryti NRI, et al. Paradoxical home temperatures during cold weather: a proof-of-concept study. International Journal of Biometeorology. 2020; 64:2065–2076.
Siddika N, et al. Short-term prenatal exposure to ambient air pollution and risk of preterm birth - A population-based cohort study in Finland. Environmental Research. 2020; 184:109290.
Valtonen RIP, et al. Endothelial function in response to exercise in the cold in patients with coronary artery disease. Clinical Physiology and Functional Imaging. 2020; 40:245–256.
Liu C, et al. Ambient Particulate Air Pollution and Daily Mortality in 652 Cities. New England Journal of Medicine. 2019; 381(8):705-715. [Included in the New England Journal of Medicine 12 Notable Articles of 2019]
Lee JY, et al. Predicted temperature-increase-induced global health burden and its regional variability. Environment International. 2019; 131:105027.
Siddika N, et al. Synergistic effects of prenatal exposure to fine particulate matter (PM2.5) and ozone (O3) on the risk of preterm birth: A population-based cohort study. Environmental Research. 2019; 176:108549.
Ikäheimo TM, et al. Good safety practice in a randomized controlled trial (CadColdEx) involving increased cardiac workload in patients with coronary artery disease. BMC Cardiovascular Disorders. 2019; 19:69.
Sera F, et al. How urban characteristics affect vulnerability to heat and cold: a multi-country analysis. International Journal of Epidemiology. 2019; 48(4):1101-1112.
Ryti NRI, et al. Coronary stenosis as a modifier of the effect of cold spells on the risk of sudden cardiac death: a case-crossover study in Finland. BMJ Open. 2018; 8(8):e020865.
Vicedo-Cabrera AM, et al. Temperature-related mortality impacts under and beyond Paris Agreement climate change scenarios. Climatic Change. 2018; 150(3-4):391-402. [Top 5% of all research outputs ever tracked by Altmetric, measured in 2018]
Guo Y, et al. Quantifying excess deaths related to heatwaves under climate change scenarios: A multi-country time-series modelling study. PLoS Medicine. 2018; 15(7):e1002629.
Valtonen RIP, et al. Cardiovascular Responses to Cold and Submaximal Exercise in Patients with Coronary Artery Disease. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology. 2018; 315(4):R768-R776.
Gasparrini A, et al. Projections of temperature-related excess mortality under climate change scenarios. Lancet Planetary Health. 2018; 1(9):e360-e367.
Ryti NRI, et al. Cold spells and ischaemic sudden cardiac death: effect modification by prior diagnosis of ischaemic heart disease and cardioprotective medication. Scientific Reports. 2017; 7:41060.
Ryti NRI, et al. The risk of sudden cardiac death in relation to season-specific cold spells: a case-crossover study in Finland. BMJ Open. 2017; 7(11):e017398.
Ryti NRI, et al. Global Association of Cold Spells and Adverse Health Effects: A Systematic Review and Meta-Analysis. Environmental Health Perspectives. 2016; 124(1):12-22. [RECTOR'S AWARD]
Vainio L, et al. Neuronostatin, a novel peptide encoded by somatostatin gene, regulates cardiac contractile function and cardiomyocyte survival. Journal of Biological Chemistry. 2012; 287(7):4572-80.

publications

2345

citations

17.00

H-index (ResearchGate)

Contact information

E-mail

niilo.ryti@oulu.fi

Phone number

0407458484

Social media

Keywords

cardiac arrests effects of cold and heat on health and human performance epidemiology climate change