SEPA - Сербская нацыянальная сетка маніторынгу паветра (Дзяржаўная сетка аўтаматычнага кантролю якасці паветра)
Сетка датчыкаў якасці паветра ў рэжыме рэальнага часу
падзяліцца: “SEPA - Serbian National Air Monitoring network (Državna mreža za automatski monitoring kvaliteta vazduha): сетка датчыкаў якасці паветра ў рэжыме рэальнага часу”
https://aqicn.org/network/rs-amskv/be/

Стужка якасці паветра ў рэжыме рэальнага часу забяспечваецца:

SEPA - Сербская нацыянальная сетка маніторынгу паветра (Дзяржаўная сетка аўтаматычнага кантролю якасці паветра)

SEPA - Serbian National Air Monitoring network (Državna mreža za automatski monitoring kvaliteta vazduha)

Некаторыя з самых забруджаных станцый кантролю якасці паветра:

Пераклад на іншыя мовы:

Шукаеце іншы горад?

Увядзіце назву горада
↓ ↓ ↓
або дазвольце нам знайсці бліжэйшую станцыю маніторынгу якасці паветра
Наведаныя раней станцыі:


Ці ведаеце вы якія-небудзь станцыі кантролю якасці паветра ў вашым раёне?
чаму б не прыняць удзел у карце са сваёй уласнай станцыяй якасці паветра?

Нашы маніторы якасці паветра GAIA вельмі простыя ў наладжванні: вам спатрэбіцца толькі кропка доступу WIFI і блок харчавання, сумяшчальны з USB.

Пасля падключэння вашы ўзроўні забруджвання паветра ў рэжыме рэальнага часу будуць імгненна даступныя на картах і праз API.

Станцыя пастаўляецца з 10-метровым воданепранікальным кабелем харчавання, блокам харчавання USB, мантажным абсталяваннем і дадатковай сонечнай панэллю.

Націсніце для атрымання дадатковай інфармацыі

Сеткавыя каналы Airnet

🇹🇭AirGradient Co. Ltd. 2463 stations Dubai Municipality- Environment Department - Environmental Planning And Studies Section 8 stations 🇳🇬Abuja SERLCAR Space Environment Research Laboratory, Center for Atmospheric Research, Abuja1 stations 🇦🇪AED - Environment Agency – Abu Dhabi ( هيئة البيئة - أبو ظبي) 57 stations 🇲🇪Agencija Za Zaštitu Prirode I životne Sredine - Montenegro Environement Protection Agency 10 stations 🇨🇦Air Quality Ontario - The Ontario Ministry Of The Environment And Climate Change 38 stations 🇩🇪Air Quality, Saxon State Office (Luftqualität Sächsisches Landesamt Für Umwelt, Landwirtschaft Und Geologie) 50 stations 🇫🇷Airbreizh - Qualité De L'air En Bretagne 13 stations 🇧🇴 🇨🇱 🇲🇽 🇪🇨 🇵🇪 🇺🇸 🇲🇽 🇦🇷Aire Ciudadano Ciencia ciudadana por la Calidad del Aire654 stations 🇰🇿AirKaz.org 249 stations 🇫🇷AirParif - Association De Surveillance De La Qualité De L'air En Île-de-France 39 stations 🇹🇷Airqoon 8 stations Alaska DEC- Division Of Air Quality Information, Alaska Department Of Enviromental Protection 56 stations 🇨🇦Alberta Environment And Sustainable Resource Development - Air Quality Monitoring 64 stations 🇬🇹Ambente 4 stations 🇱🇹Aplinkos Monitoringas Vilniaus 21 stations 🇺🇸AQMD NASA 69 stations AQSEA Air Quality Monitoring Capacity in Southeast Asia84 stations 🇫🇷ATMO Bourgogne-Franche-Comté - Surveillance De La Qualite De L’air 23 stations 🇫🇷Atmo En Hauts-de-France - Pas-de-Calais 38 stations 🇫🇷AtmoGE - La Qualité De L’air Dans Le Grand Est 50 stations 🇫🇷AtmoNAQ - La Qualité De L’air En Nouvelle Aquitaine 46 stations AUPP Liger Leadership Academy 11 stations 🇦🇺Australian National University (ANU) 38 stations 🇲🇽Ayuntamiento De Mexicali 116 stations 🇮🇩Balai Besar Standardisasi Dan Pelayanan Jasa Pencegahan Pencemaran Industri (BBSPJPPI) 4152 stations 🇮🇩Bandung Institute Of Technology (ITB) 1 stations 🇧🇩Bangladesh University Of Engineering And Technology 10 stations 🇩🇪Bayern State Office For The Environment (Bayerisches Staatsministerium Für Umwelt Und Verbraucherschutz) - LfU 46 stations 🇩🇪Berlin Air Quality - (Luftqualität In Berlin) 14 stations 🇮🇩BMKG | Badan Meteorologi, Klimatologi Dan Geofisika 28 stations 🇨🇦British Columbia, Canada Air Quality Monitoring Agency 77 stations 🇺🇸California EDCAQMD El Dorado County Air Quality Management District66 stations 🇺🇸California FRAQMD The Feather River AQMD1 stations 🇺🇸California RIVR Riverside County Air Quality Management District16 stations 🇺🇸California SBCAPCD Santa Barbara County Air Pollution Control District64 stations 🇺🇸California SCSB Sonoma Coast State Beach40 stations 🇨🇴 🇪🇸Canair.io Citizen network for monitoring air quality29 stations 🇺🇸CCA California Coalition for Clean Air220 stations CCA Colorado Citizens for Clean Air40 stations 🇺🇸CCST Crow Creek Sioux Tribe10 stations 🇲🇳Central Laboratory Of Environment And Metrology (CLEM) 9 stations Central Philippine University 4 stations 🇲🇬Centre National De Recherches Sur L'Environnement 8 stations 🇧🇷CETESB - Companhia Ambiental Do Estado De São Paulo 63 stations 🇺🇸City Of Minneapolis Community Air Monitoring Project 105 stations Clarity Clarity Movement Co.2379 stations 🇺🇸Clean Air Carolina 100 stations 🇧🇷Clean Air For All African Cities | AirQo 741 stations 🇬🇧Clean Air Nottingham 13 stations 🇺🇸Clean Air Now Kansas (CANK) 33 stations 🇺🇸CleanAIRE NC 151 stations 🇹🇭Cmu Ccdc 3319 stations 🇺🇸College Of Food Agricultural and Natural Resource Sciences1 stations 🇺🇸Colorado APCD Colorado Air Pollution Control Division79 stations 🇺🇸Colorado Department Of Environmental Protection 46 stations 🇨🇦Columbia Shuswap Regional District Air Monitoring Project 35 stations Communities Against Pollution (CAP) 9 stations 🇪🇸Consejería De Educación, Universidades Y Sostenibilidad - Gobierno De Canarias 49 stations 🇪🇸Conselleria De Infraestructuras, Territorio Y Medio Ambiente (Calidad Del Aire - CALIDAD AMBIENTAL) 23 stations 🇮🇪Cork City Council CCC Cork City Council Air Monitoring Project53 stations 🇭🇷Croatian Environment Agency - Agencija Za Zaštitu Okoliša 59 stations 🇦🇺CSIRO Commonwealth Scientific and Industrial Research Organisation35 stations 🇨🇿Czech Hydrometeorological Institute (Český Hydrometeorologický ústav) 188 stations 🇦🇩Departament De Medi Ambient D'Andorra - Qualitat De L'Aire A Andorra 4 stations 🇪🇸Departamento De Medio Ambiente, Planificación Territorial Y Vivienda · Gobierno Vasco 62 stations 🇧🇩Department Of Environment-Government Of The People's Republic Of Bangladesh পরিবেশ অধিদপ্তর-গণপ্রজাতন্ত্রী বাংলাদেশ সরকার 17 stations 🇪🇸Direccion General Medio Ambiente, Comunidad Autónoma De La Región De Murcia 11 stations 🇳🇬EdoState Edo State Nigeria3 stations 🇺🇸EJCAN Environmental Justice Community Action Network28 stations 🇦🇺Environment Protection Authority | EPA Victoria 30 stations 🇨🇦Environnement Au Québec 41 stations 🇨🇦EnvironnementQc Environnement Québec4 stations EPA Ghana 7 stations 🇨🇭EPFL-LAPI Laboratory of atmospheric processes and their impacts7 stations Federalni Hidrometeorološki Zavod 25 stations 🇺🇸Florida Department Of Environmental Protection 68 stations 🇱🇰Foundation For Environment Climate and Technology (FECT)11 stations 🇺🇸FRESSCA Filtration for Respiratory Exposure to wildfire Smoke from Swamp Cooler Air47 stations Galapagos UNC/USFQ Galapagos Science Center0 stations 🇵🇪GeoHealthPeru Regional GEOHealth Hub in Peru184 stations Ghana AQ The Ghana Urban Air Quality Project (GHAir)13 stations 🇳🇵Government Of Nepal, Ministry Of Population And Environment, Department Of Environment Air Quality Monitoring 24 stations 🇫🇷GWAD'AIR, L’Association Agréée De Surveillance De La Qualité De L'Air En Guadeloupe 6 stations HabitatMap 1886 stations 🇺🇸Hawaii State Department Of Health 2 stations Hong Kong Environmental Protection Department - 空氣質素健康指數單張及海報 18 stations 🇺🇸Houston AAH Air Alliance Houston99 stations 🇭🇺Hungarian Air Quality Network (Maďarský Systém Na Meranie Znečistenia Vzduchu) 62 stations 🇧🇷IEMA - Instituto Estadual De Meio Ambiente E Recursos Hídricos 14 stations IFRO Karolinska Institutet3 stations 🇫🇮Ilmanlaatu - Air Quality In Finland 90 stations 🇯🇪Information And Public Services For The Island Of Jersey (L'înformâtion Et Les Sèrvices Publyis Pouor I'Île Dé Jèrri) 2 stations 🇽🇰Instituti Hidrometeorologjik I Kosovës 12 stations 🇦🇴Instituto Superior Politécnico Tundavala 8 stations 🇧🇪IRCEL-CELINE - Belgian Interregional Environment Agency 86 stations 🇮🇪Ireland Environmental Protection Agency (EPA) 111 stations 🇯🇵Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) 37 stations 🇯🇵Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) 86 stations 🇯🇵Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) 118 stations 🇦🇷Jujuy Municipio de San Salvador de Jujuy0 stations 🇮🇩Kementerian Lingkungan Hidup Dan Kehutanan 158 stations 🇺🇦Kievoblast Ecology 13 stations 🇫🇷L'observatoire De La Qualité De L'air En Région Sud Provence-Alpes-Côte D'Azur 57 stations 🇬🇹Laboratorio ECOQUIMSA Guatemala 11 stations 🇭🇳Laboratorio ECOQUIMSA Honduras 1 stations Lamont-Doherty Earth Observatory 5 stations 🇩🇪Landesamt Für Umwelt, Naturschutz Und Geologie - LUNG 17 stations 🇩🇪Landesamt Für Umwelt- Und Arbeitsschutz 9 stations 🇩🇪Landesamt Für Umweltschutz Sachsen-Anhalt 25 stations 🇩🇪LANUV - State Agency For Nature, Environment And Consumer Protection Of North Rhine Westphalia (Landesamt Für Natur, Umwelt Und Verbraucherschutz NRW) 61 stations 🇬🇷LAPUP Laboratory of Atmospheric Physics of the University of Patras8 stations 🇸🇳LASOMED Université Gaston Berger1 stations 🇸🇳LPAOSF Laboratoire de Recherche dans le domaine du Climat, de l'Atmosphére et de l'Océanographie2 stations 🇩🇪Luftqualität In Schleswig-Holstein 15 stations 🇩🇪Luftqualität | Nds. Ministerium Für Umwelt, Energie Und Klimaschutz 28 stations 🇩🇪Luftreinhaltung Rheinland-Pfalz 25 stations 🇺🇦LUN City Air (ЛУН Місто Air) 203 stations 🇫🇷Madininair La Qualité De L’air En Martinique 7 stations 🇲🇾Malaysia Department Of Environment (DOE); Air Polluant Index Management System 65 stations 🇺🇸Massachusetts MASSDEP Massachusetts Department of Environmental Protection85 stations 🇪🇸Medi Ambient. Generalitat De Catalunya 62 stations Meechai Bamboo Schools 30 stations Meteo Lausanne 1 stations 🇲🇬Meteo Madagascar 9 stations 🇺🇸Methow Valley Citizens Council 31 stations 🇪🇨Metropolitan Air Monitoring Network Of Quito Managed By Secretaria De Ambiente DMQ. 9 stations 🇵🇦MiAmbiente Ministerio de Ambiente de Panamá5 stations 🇺🇸Michigan Department Of Environmental Quality 40 stations 🇺🇸Mid-Ohio MORPC Mid-Ohio Regional Planning Commission138 stations 🇺🇾Ministerio De Ambiente De La República Oriental Del Uruguay 6 stations 🇶🇦Ministry Of Environment And Climate Change, State Of Qatar 8 stations 🇲🇰Ministry Of Environment And Physical Planning – Republic Of North Macedonia 22 stations Moenv.mv Ministry of Climate Change, Environment and Energy, Maldives1 stations 🇪🇸Monitorización Red De Calidad Del Aire Del Principado De Asturias 23 stations 🇺🇸MPCA Minnesota Pollution Control Agency27 stations 🇨🇦MSC / UNBC AQMap 1014 stations 🇺🇸Multnomah MULTCO Multnomah County Climate and Health16 stations 🇨🇭NABEL / FOEN - Switzerland Federal Office For The Environment 14 stations Nafas 60 stations NASA CSESP / RTI 207 stations National Agency For Meteorology And Environmental Monitoring (Цаг уур орчны шинжилгээний газар ) 21 stations 🇵🇪National University Of San Agustin Of Arequipa 0 stations 🇸🇪Natur Vårdsverket - Swedish Environmental Protection Agency 68 stations 🇺🇸NCC New Castle County Air Quality5 stations 🇫🇷NebuleAir 148 stations 🇳🇵Nepal Health Research Council 7 stations 🇺🇸Nevada NDEP Nevada Division of Environmental Protection215 stations 🇨🇦New Foundland And Labrador Department Of Environment And Conservation 7 stations 🇺🇸New York State Department Of Environmental Conservation (NYSDEC) 42 stations Northwest Clean Air Agency 6 stations 🇨🇦Nova Scotia Environment 8 stations 🇦🇺NSW Department Of Planning And Environment 131 stations 🇨🇦NWT Air Quality Monitoring Network 7 stations 🇨🇴OAB - El Observatorio Ambiental De Bogotá 19 stations 🇫🇷Observatoire Agréé Pour Assurer La Surveillance De La Qualité De L’air Sur Le Territoire De La Région Occitanie 42 stations 🇫🇷Observatoire De La Qualité De L'air En Auvergne-Rhône-Alpes 81 stations 🇫🇷Observatoire De La Qualité De L'Air à Mayotte - Association Agréée Pour La Surveillance De La Qualité De L'Air De Mayotte 4 stations 🇦🇺Office Of Environment And Heritage - NSW 97 stations 🇴🇲Oman Environment Authority 45 stations 🇨🇦Ontario MECP Ontario Ministry of the Environment, Conservation and Parks27 stations Open Sense 671 stations 🇫🇷ORA - L'Observatoire Réunionnais De L’Air 15 stations 🇫🇷ORA Guyane - Observatoire Régional De L'Air De Guyane 5 stations 🇺🇸Oregon CTUIR Confederated Tribes of the Umatilla Indian Reservation38 stations 🇺🇸Oregon Department Of Environmental Quality (DEQ) 81 stations Osc.lk The Overseas School of Colombo4 stations 🇨🇭OSTLUFT - Die Luftqualitätsüberwachung Der Ostschweizer Kantone Und Des Fürstentums Liechtenstein 16 stations 🇬🇭Oxygen City Environmental Protection Agency in Ghana2 stations Pai Air 20 stations 🇮🇳Paljor Naygyal Girls School 1 stations 🇬🇷PANACEA PANhellenic infrastructure for Atmospheric Composition and climatE chAnge113 stations 🇵🇪PCUP Pontificia Universidad Católica del Perú5 stations 🇺🇸Physicians For Social Responsibility Pennsylvania 97 stations 🇱🇺Portail De L'Environnement Du Grand-duché De Luxembourg 5 stations 🇵🇹Portugal -Agencia Portuguesa Do Ambiente - Qualidade Do Ar 69 stations 🇧🇷Projeto EDUC.AIR Programa de Educação em Qualidade do Ar30 stations Purple Air 69038 stations 🇫🇷Qualitair Région Corse - Surveillance De La Qualité De L'air En Corse 7 stations 🇮🇹Qualità Dell’aria | Agenzia Provinciale Per L'ambiente | Provincia Autonoma Di Bolzano - Alto Adige 14 stations 🇨🇦Québec CEAEQ Centre d'expertise en analyse environnementale du Québec95 stations 🇲🇽Red De Monitoreo De Calidad Del AireDel Estado De Guanajuato 179 stations 🇧🇷Rede Manual De Partículas Sedimentadas Da Região Sul 6 stations 🇮🇳Respirer Living Sciences 74 stations 🇨🇦Revolv'Air, Outil De Analyse De L'air Du Québec 74 stations RIVM - Rijksinstituut Voor Volksgezondheid En Milieum, Landelijk Meetnet Luchtkwaliteit 112 stations SAMOSA Sensor-based Air measurement Observatory for South Asia337 stations 🇹🇭Sansiri 58 stations 🇺🇦Save Dnipro 1792 stations SEEN 14 stations 🇧🇷SEMA_AM Secretaria de Estado de Meio Ambiente62 stations 🇵🇪SENAMHI Servicio Nacional de Meteorología e Hidrología del Perú6 stations 🇩🇪 🇫🇷 🇪🇸 🇳🇱 🇩🇰 🇧🇪 🇫🇮 🇬🇷 🇦🇺 🇮🇹 🇵🇱 🇻🇳Sensor Community formerly luftdaten.info34405 stations 🇸🇷SEPA - Serbian National Air Monitoring Network (Državna Mreža Za Automatski Monitoring Kvaliteta Vazduha) 89 stations 🇸🇨Seychelles Air Monitoring 12 stations 🇬🇩SGU-GND St. George’s University13 stations 🇨🇱Sistema Nacional De Calidad Del Aire En Chile 131 stations SJVAir.com 9 stations 🇸🇰Slovak Hydrometeorological Institute (Slovenský Hydrometeorologický ústav) 65 stations 🇸🇮Slovenian Environment Agency (Agencija RS Za Okolje) 25 stations 🇿🇦South African Air Quality Information System - SAAQIS 190 stations 🇨🇦Southeast Saskatchewan - Airshed Association 6 stations 🇺🇸State Of Hawaii, Department Of Health, Clean Air Branch 15 stations 🇫🇷Surveillance De La Qualité De L'air Dans La Région Centre 23 stations Sustenta Honduras 11 stations 🇺🇸Texas Commission On Environmental Quality (TCEQ) 140 stations 🇺🇸Texas UNT-GEO University of North Texas, Department of Geography and the Environment99 stations 🇩🇰The Department Of Environmental Science At Aarhus University - Institut For Miljøvidenskab 5 stations 🇮🇸The Environment Agency Of Iceland 19 stations 🇱🇰The Environmental Division Of NBRO 16 stations 🇬🇱The School In Qaanaaq 1 stations The Urban Unit 147 stations 🇩🇪Thüringer Landesamt Für Umwelt, Bergbau Und Naturschutz 20 stations 🇯🇵Tokyo, Japan Environment Agency (東京都環境局) 89 stations U.S. Department Of State 66 stations 🇸🇳UASZ Université Assane Seck de Ziguinchor2 stations 🇺🇸UCM University of California Merced378 stations 🇬🇧UK-AIR, Air Quality Information Resource - Defra, UK 33 stations 🇬🇧UK-AIR, Air Quality Information Resource - Defra, UK 73 stations 🇦🇹Umweltbundesamt 183 stations 🇩🇪Umweltbundesamt | Für Mensch Und Umwelt 7 stations UNICEF Laos AQM Project 120 stations 🇳🇬UNILAG AQMRG University of Lagos Air Quality Monitoring Research Group7 stations 🇨🇴Universidad De Los Llanos 1 stations 🇵🇪Universidad Nacional Intercultural Juan Santos Atahualpa 3 stations 🇵🇪Universidad Peruana Cayetano Heredia (UPCH) 4 stations 🇧🇴Universidad Privada Boliviana 3 stations 🇳🇦University Of Namibia 1 stations 🇲🇺UoM University of Mauritius1 stations 🇷🇴 🇮🇱URad Monitor 3756 stations 🇸🇳USSEIN Université du Sine Saloum El-hâdj ibrahima NIASS2 stations 🇺🇸Utopia Fiber UTOPIA Fiber powered air quality monitoring program197 stations 🇻🇳Vietnam Center For Environmental Monitoring Portal (cổng Thông Tin Quan Trắc Môi Trường) 68 stations 🇨🇦Ville De Montreal - Réseau De Surveillance De La Qualité De L'air 20 stations Waqi World Air Quality Index data feed21 stations 🇺🇸Washington SCSB Northwest Clean Air Agency74 stations 🇺🇸Washington State Department Of Ecology 167 stations 🇺🇸WE ACT For Environmental Justice West Harlem Environmental Action, Inc11 stations 🇦🇺Western Australia DWER Western Australia Department of Water and Environmental Regulation20 stations 🇺🇸Wisconsin Department Of Natural Resources 36 stations 🇿🇲Zambia CEEEZ Centre for Energy, Environment and Engineering1 stations 🇨🇴Área Metropolitana Del Valle De Aburrá 21 stations 🇬🇷ΥΠΟΥΡΓΕΙΟ ΠΕΡΙΒΑΛΛΟΝΤΟΣ ΚΑΙ ΕΝΕΡΓΕΙΑΣ - Greek Ministry Of Environment And Energy 14 stations 🇰🇿Қазгидромет - Kazhydromet 178 stations 🇹🇭ยักษ์ขาว Yakkaw (White Giant) 416 stations 🇺🇸საქართველოს გარემოს დაცვისა და სოფლის მეურნეობის სამინისტრო - Ministry Of Environment Protection And Agriculture Of Georgia 15 stations

Рэйтынг якасці паветра па краінах

Пра якасць паветра і вымярэнне забруджвання:

Пра ўзровень якасці паветра

- Значэнні індэкса якасці паветра (AQI).Узроўні занепакоенасці здароўем
0 - 50 добра Якасць паветра лічыцца здавальняючым, і забруджванне паветра ўяўляе мала або няма рызыкі
51 -100 ўмераны Якасць паветра з'яўляецца прымальным; Аднак, для некаторых забруджвальных рэчываў можа быць умераным турботай здароўя для вельмі невялікай колькасці людзей, якія незвычайна адчувальныя да забруджвання паветра.
101-150 Нездаровы для адчувальных груп Члены адчувальных груп могуць адчуваць наступствы для здароўя. Шырокая грамадскасць, хутчэй за ўсё, будуць закрануты няма.
151-200 нездаровы Кожны можа пачаць адчуваць ўздзеянне на здароўе; Члены адчувальных груп могуць адчуваць больш сур'ёзныя наступствы для здароўя
201-300 Вельмі Нездаровы папярэджання для здароўя надзвычайных сітуацый. Усё насельніцтва, хутчэй за ўсё, будуць закрануты.
300+ небяспечны Небяспечна для здароўя: кожны можа адчуваць больш сур'ёзныя наступствы для здароўя

Каб даведацца больш пра якасць паветра і забруджванне, азнаёмцеся з тэмай Вікіпедыі «Якасць паветра» або кіраўніцтвам airnow «Якасць паветра і ваша здароўе» .

Вельмі карысныя парады па здароўі ад доктара медыцынскіх навук з Пекіна Рычарда Сэн-Сіра глядзіце ў блогу www.myhealthbeijing.com .


Апавяшчэнне аб выкарыстанні: Усе дадзеныя па якасці паветра з'яўляюцца неправеранымі на момант публікацыі, і ў сувязі з забеспячэннем якасці гэтых дадзеныя могуць быць зменены без папярэдняга паведамлення ў любы час. World Air Індэкс якасці Праект ажыццяўляецца ўсе разумныя навыкі і сыход пры складанні зместу гэтай інфармацыі і ні пры якіх абставінах не World Air Індэкс якасці каманда праекта або яго агенты нясуць адказнасць у кантракце, деликта ці іншым чынам за любыя страты, пашкоджанні або шкоду, прама ці ўскосна ад крыніцы гэтых дадзеных.



Settings


Language Settings:


Temperature unit:
Celsius