From the invention of the barometer in 1643 to modern climate models, this timeline traces key milestones in meteorology and climate science, including the discovery of atmospheric circulation, the greenhouse effect, and international efforts to understand and address global warming.
Evangelista Torricelli creates the first mercury barometer, demonstrating that air has weight and establishing the principle of atmospheric pressure. This invention is fundamental to weather forecasting. #meteorology #science
Robert Hooke devises a wind gauge, an early anemometer, to measure wind speed. This tool becomes essential for meteorological observations. #weather #technology
Edmond Halley publishes the first meteorological chart showing the global distribution of trade winds, linking solar heating to atmospheric circulation. #meteorology #history
Daniel Gabriel Fahrenheit proposes the Fahrenheit temperature scale, providing a standard for thermometric measurements. This scale is still used in the U.S. #temperature #science
George Hadley describes the Hadley cell, explaining how solar heating at the equator drives trade winds and the general circulation of the atmosphere. #climate #science
Anders Celsius proposes a centigrade temperature scale, later adopted globally as the Celsius scale. It becomes the standard for scientific work. #temperature #science
Luke Howard publishes a classification of cloud types (cirrus, cumulus, stratus, nimbus), establishing a systematic nomenclature still used today. #meteorology #clouds
Francis Beaufort creates a scale to estimate wind speed based on sea conditions. The Beaufort scale becomes a standard for maritime and meteorological use. #wind #navigation
Heinrich Wilhelm Brandes publishes the first synoptic weather map, using data from 1783 to analyze atmospheric pressure patterns. This lays groundwork for modern weather analysis. #meteorology #maps
Gaspard-Gustave de Coriolis mathematically describes the deflective force caused by Earth's rotation, crucial for understanding atmospheric circulation and cyclones. #physics #meteorology
Lucien Vidie invents the aneroid barometer, a portable device that measures atmospheric pressure without mercury. It becomes widely used for altimetry and weather forecasting. #invention #science
Urbain Le Verrier charts the course of a storm using telegraph data, producing the first operational synoptic weather map. This heralds modern real-time meteorology. #meteorology #history
Admiral Robert FitzRoy issues the first daily weather forecast in the Times (London), using barometric data. The pioneering service is soon taken over by the UK Met Office. #weather #forecast
The India Meteorological Department (IMD) is founded, becoming one of the first national meteorological services in Asia. It greatly improves monsoon forecasting and disaster preparedness. #meteorology #India
Svante Arrhenius publishes a paper calculating that doubling atmospheric CO2 could raise global temperature by 5–6°C, laying the foundation for climate science. #climate #greenhouse
Vilhelm Bjerknes establishes the Bergen School, which develops the concepts of air masses, fronts, and cyclones, forming the basis of modern synoptic meteorology. #weather #science
Wilson A. Bentley photographs thousands of snowflake crystals, revealing their unique hexagonal symmetry and advancing cloud physics. His work is published in 1931. #snow #science
Milutin Milankovitch theorizes that variations in Earth's orbit and axial tilt drive long-term climate changes, including ice ages. His theory is later validated. #climate #iceages
Lewis Fry Richardson publishes a method for weather prediction using numerical calculations, but his manual computation yields unrealistic results. It later becomes feasible with computers. #weather #computation
Carl-Gustaf Rossby identifies large-scale atmospheric waves that influence jet streams and weather patterns, now known as Rossby waves. #atmosphere #climate
Wartime radar technology is adapted for weather observation, allowing detection of precipitation and storms. This leads to the first weather radar networks. #weather #technology
Jule Charney and a team use the ENIAC computer to produce the first successful numerical weather prediction, a milestone in computational meteorology. #computing #weather
The International Geophysical Year (IGY) promotes global scientific cooperation, leading to extensive meteorological data collection and the discovery of the jet stream's structure. #science #cooperation
Charles David Keeling starts continuous CO2 monitoring at Mauna Loa Observatory, producing the famous Keeling Curve that shows rising atmospheric carbon dioxide. #climate #CO2
NASA launches TIROS-1, the first successful weather satellite, providing global cloud images and revolutionizing weather forecasting and climate monitoring. #space #weather
Edward Lorenz finds that small changes in initial conditions can lead to vastly different weather outcomes, coining the 'butterfly effect' and founding chaos theory. #chaos #weather
Syukuro Manabe and Kirk Bryan develop the first coupled ocean-atmosphere general circulation model (GCM), enabling long-term climate simulations. #climate #modeling
Jacob Bjerknes explains the connection between El Niño warming and the Southern Oscillation, forming the basis for ENSO theory and seasonal forecasting. #ENSO #climate
The World Climate Conference in Geneva recognizes climate change as a global issue and calls for international collaboration, leading to the World Climate Programme. #climate #policy
British Antarctic Survey scientists publish evidence of a dramatic thinning of the ozone layer over Antarctica, prompting global action to phase out CFCs. #ozone #environment
The Intergovernmental Panel on Climate Change (IPCC) is founded by the WMO and UNEP to assess climate science and inform policy. #climate #science
The IPCC releases its First Assessment Report, concluding that human-caused greenhouse gas emissions are likely to warm the planet, setting the stage for climate negotiations. #climate #report
The United Nations Framework Convention on Climate Change (UNFCCC) is signed in Rio de Janeiro, establishing a framework for international climate action. #climate #treaty
Nations adopt the Kyoto Protocol, the first legally binding agreement to reduce greenhouse gas emissions, though its impact is limited by non-participation of major emitters. #climate #policy
The Coupled Model Intercomparison Project (CMIP) begins, providing a framework for comparing and improving climate models worldwide. #climate #modeling
The IPCC and Al Gore jointly receive the Nobel Peace Prize for their efforts to disseminate knowledge about human-caused climate change and to lay the foundations for countermeasures. #climate #peace
196 countries adopt the Paris Agreement, committing to limit global temperature rise to well below 2°C above pre-industrial levels and pursue efforts for 1.5°C. #climate #agreement
The IPCC releases a special report outlining the impacts of global warming of 1.5°C and the need for rapid, far-reaching reductions in greenhouse gas emissions. #climate #science
The IPCC Sixth Assessment Report (AR6) provides the most comprehensive assessment of climate change, stating that human influence has warmed the atmosphere, ocean, and land unequivocally. #climate #report
July 2023 is confirmed as the hottest month ever recorded globally, with average temperatures exceeding previous records, highlighting the urgency of climate action. #climate #record
