TY - JOUR AU - Kristóf, Erzsébet AU - Ács, Ferenc AU - Zsákai, Annamária TI - On the Human Thermal Load in Fog JF - METEOROLOGY J2 - METEOROLOGY VL - 3 PY - 2024 IS - 1 SP - 83 EP - 96 PG - 14 SN - 2674-0494 DO - 10.3390/meteorology3010004 UR - https://m2.mtmt.hu/api/publication/34565336 ID - 34565336 LA - English DB - MTMT ER - TY - JOUR AU - Ács, Ferenc AU - Szalkai, Zsófia AU - Kristóf, Erzsébet AU - Zsákai, Annamária TI - Thermal resistance of clothing in human biometeorological models JF - GEOGRAPHICA PANNONICA J2 - GEOGRAPHICA PANNONICA VL - 27 PY - 2023 IS - 2 SP - 83 EP - 90 PG - 8 SN - 0354-8724 DO - 10.5937/gp27-40554 UR - https://m2.mtmt.hu/api/publication/34074750 ID - 34074750 AB - Three different clothing thermal resistance (r cl) schemes are compared using meteorological and human data collected in Martonvásár. Model 1 is the most complex, it is energy balance based. Model 3 is the simplest, it is the UTCI-clothing model used as submodel in the UTCI (Universal Thermal Climate Index) scheme. It uses air temperature as sole input. Model 2 uses more data than model 3, the data used are the thermal insulation values of the clothing worn. Meteorological data refer to the town Martonvásár. The data were collected in the period August 9, 2016-May 23, 2018. The main result is that the r cl values obtained by model 1 differ significantly in most of the cases from the results obtained by models 3 or 2. The fact that the results of model 1 rarely match the results of model 3 or model 2 suggests that the energy balance between human body and environment is rarely achieved, merely this is the case in approximately 10 percent of the cases. LA - English DB - MTMT ER - TY - CONF AU - Szabó, Amanda Imola AU - Breuer, Hajnalka AU - Michal, Belda AU - Ács, Ferenc TI - Studying the process of climate change using the continuous form of the Feddema climate classification T2 - EGU General Assembly 2023: Abstracts PB - European Geosciences Union (EGU) C1 - München PY - 2023 SP - 1 UR - https://m2.mtmt.hu/api/publication/33891368 ID - 33891368 LA - English DB - MTMT ER - TY - JOUR AU - Ács, Ferenc AU - Kristóf, Erzsébet AU - Zsákai, Annamária TI - Individual local human thermal climates in the Hungarian lowland: Estimations by a simple clothing resistance‐operative temperature model JF - INTERNATIONAL JOURNAL OF CLIMATOLOGY J2 - INT J CLIMATOL VL - 43 PY - 2023 IS - 3 SP - 1273 EP - 1292 PG - 20 SN - 0899-8418 DO - 10.1002/joc.7910 UR - https://m2.mtmt.hu/api/publication/33249109 ID - 33249109 N1 - First published: 31 October 2022 AB - Human thermal climate in the Hungarian lowland is investigated by using a clothing resistance-operative temperature model performing individual, local, and long-term concurrent observations of weather and human thermal perception. Human thermal load is characterized in terms of clothing resistance r(cl) and operative temperature T-o. The model is also used as a tool to analyse the relationship between r(cl) and the structural parameters of the body (relative fat mass index (fatBMI) and relative muscle mass index (muscleBMI)). This analysis works with data collected on more than 1,000 occasions of weather and thermal perception observation and uses body structure data of more than 3,000 adults and children. By analysing the data, the following human thermal climate characteristics have been established. (a) T-o of about 80 degrees C can be considered as the upper limit of heat stress in the Hungarian lowland, similarly, T-o of about -35 to -37 degrees C can be taken as the lower limit of cold stress. (b) Interpersonal thermal load variations increase with increasing of cold stress; these variations are the smallest within the "thermoneutral" zone. (c) In cold stress situations, there is a significant sexual dimorphism in the relationship between r(cl) and fatBMI. (d) In night time period of the day, T-o can vary between 25 degrees C and the lower limit of cold stress. In this range of T-o, thermal perception types "neutral," "cool," "cold," and "very cold" occurred. Based on the results, it can be seen that interpersonal thermal load variations cannot be neglected in extreme cold weather conditions, and that interpersonal variations of fatBMI index are determinant in the formation of individual clothing resistance. LA - English DB - MTMT ER - TY - JOUR AU - Ács, Ferenc AU - Kristóf, Erzsébet AU - Szabó, Amanda Imola AU - Zsákai, Annamária TI - New statistical deterministic method for estimating human thermal load and sensation — application in the Carpathian region JF - THEORETICAL AND APPLIED CLIMATOLOGY J2 - THEORET APPL CLIMAT VL - 151 PY - 2022 IS - 1-2 SP - 691 EP - 705 PG - 15 SN - 0177-798X DO - 10.1007/s00704-022-04297-w UR - https://m2.mtmt.hu/api/publication/33290239 ID - 33290239 N1 - Faculty of Science, Institute of Geography and Earth Sciences, Department of Meteorology, Eötvös Loránd University, Budapest, 1117, Hungary Department of Human Anthropology, Faculty of Science, Eötvös Loránd University, Budapest, 1117, Hungary Export Date: 2 January 2023 Correspondence Address: Ács, F.; Faculty of Science, Hungary; email: acs@caesar.elte.hu AB - A new statistical deterministic model is presented for estimating human thermal load and sensation. Human thermal load is simulated in terms of clothing resistance ( r cl ) and operative temperature ( T o ). The model’s input data are wind speed, air temperature, mass of the human body, body length, sex, age, and the latitude of the site. T o is statistically linked to potential evapotranspiration, whilst human thermal perception to r cl . The model has been validated in the Carpathian Mountains region for the period 1971–2000 comparing it with the original deterministic r cl model. Thermal perceptions of the representative Hungarian male and female are estimated by using individual thermal perception– r cl point clouds. Metabolic heat flux density differences between persons are less than 15 Wm −2 . Human thermal perception area distribution has a topography-based configuration. The prevailing annual perception of Hungarians (for both men and women) in lowland and hilly areas is “cool,” although “neutral” may also occur; in mountains, perception is mostly “cool” or “cold,” with “very cold” being also possible. In the month of July, the perception type in mountains is “neutral” or “cool” depending on the person. In lowland areas, the methodology cannot be applied since the energy balance is not met. The model can also be applied in other heat-deficient regions if the region-specific operative temperature–potential evapotranspiration and the human-specific thermal perception - r cl statistical relationships are determined for the new region. LA - English DB - MTMT ER - TY - CHAP AU - Ács, Ferenc AU - Kristóf, Erzsébet AU - Szalkai, Zsófia AU - Rátz-Sulyok, Fanny Zselyke AU - Zsákai, Annamária ED - Oláh, Róbert TI - Humán termikus klíma vizsgálatok: a UTCI és a ruházati ellenállás index modellek összehasonlító vizsgálata T2 - „... születtem, elvegyültem és kiváltam." - Tanulmánykötet Dr. Makra László professzor 70. születésnapjára / „... I was born, received and found individuation.” - Volume of Studies in Honor of 70-year-old Prof. Dr. László Makra PB - Magánkiadás (nemzetközi) CY - Nagykőrös SN - 9786150140186 PY - 2022 SP - 1 EP - 13 PG - 13 UR - https://m2.mtmt.hu/api/publication/33244004 ID - 33244004 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Ács, Ferenc AU - Kristóf, Erzsébet AU - Szabó, Amanda Imola AU - Breuer, Hajnalka AU - Szalkai, Zsófia AU - Zsákai, Annamária TI - New Air Temperature- and Wind Speed-Based Clothing Thermal Resistance Scheme—Estimations for the Carpathian Region JF - CLIMATE J2 - CLIMATE VL - 10 PY - 2022 IS - 9 SN - 2225-1154 DO - 10.3390/cli10090131 UR - https://m2.mtmt.hu/api/publication/33078193 ID - 33078193 N1 - Department of Meteorology, Faculty of Science, Institute of Geography and Earth Sciences, Eötvös Loránd University, Budapest, 1117, Hungary Department of Human Anthropology, Faculty of Science, Eötvös Loránd University, Budapest, 1117, Hungary Export Date: 28 November 2022 Correspondence Address: Ács, F.; Department of Meteorology, Hungary; email: acs@caesar.elte.hu AB - A new clothing thermal resistance scheme is presented and verified for the Carpathian region and for the time period 1971–2000. The scheme is as simple as possible by connecting operative temperature to air temperature, which allows for it to only use air temperature and wind speed data as meteorological inputs. Another strength of the scheme is that a walking person’s metabolic heat flux density is also simply simulated without having to regard any thermoregulation processes. Human thermal load in the above region is characterised by a representative adult Hungarian male and female with a body mass index of 23–27 kgm−2. Our most important findings are as follows: (1) human thermal load in the Carpathian region is relief dependent; (2) the scheme cannot be applied in the lowland areas of the region in the month of July since the energy balance is not met; (3) in the same areas but during the course of the year, clothing thermal resistance values are between 0.4 and 1 clo; (4) clothing thermal resistance can reach 1–1.2 clo in the mountains in the month of July, but during the course of the year this value is 1.8 clo; and (5) the highest clothing thermal resistance values can be found in January reaching about 2.5 clo. The scheme may be easily applied to any another region by determining new, region-specific, operative temperature–air temperature relationships. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Amanda Imola AU - Breuer, Hajnalka AU - Ács, Ferenc AU - Belda, Michal AU - Feddema, Johannes TI - Projected changes in Feddema climate characteristics in the Larger Carpathian Region by the end of the 21 st century JF - INTERNATIONAL JOURNAL OF CLIMATOLOGY J2 - INT J CLIMATOL VL - 42 PY - 2022 IS - 11 SP - 5732 EP - 5747 PG - 16 SN - 0899-8418 DO - 10.1002/joc.7558 UR - https://m2.mtmt.hu/api/publication/32671624 ID - 32671624 N1 - Funding Agency and Grant Number: Canadian Urban Environmental Health Research Consortium (CANUE); Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences; Eotvos Lorand University Funding text: Canadian Urban Environmental Health Research Consortium (CANUE); Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences; Eotvos Lorand University LA - English DB - MTMT ER - TY - BOOK AU - Szabó, Amanda Imola AU - Breuer, Hajnalka AU - Ács, Ferenc TI - A Kárpát-régióban jellemző éghajlati típusok és azok eloszlásának változása különböző éghajlati forgatókönyvek esetén. PY - 2021 UR - https://m2.mtmt.hu/api/publication/33891348 ID - 33891348 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Szabó, Amanda Imola AU - Breuer, Hajnalka AU - Michal, Belda AU - Ács, Ferenc ED - [Nemzetstratégiai, Kutatóintézet] TI - Az évi és szezonális hő- és vízellátottság várható változásai a Kárpát-régióban a 21. század végére Feddema alapján. T2 - III. Interdiszciplináris Konferencia a Kárpát-medencei Magyarság Társadalmi és Gazdasági Helyzetéről : absztraktkötet PB - Nemzetstratégiai Kutatóintézet CY - Budapest SN - 9786155639388 PY - 2021 SP - 1 EP - 1 PG - 1 UR - https://m2.mtmt.hu/api/publication/33891318 ID - 33891318 LA - Hungarian DB - MTMT ER -