| World Meteorological Day | |
|---|---|
 Afghan stamps issued for the 1963 event | |
| Significance | support for environmental protection |
| Begins | 23 March 1961 |
| Date | 23 March |
| Next time | 23 March 2024 |
| Frequency | annual |
World Meteorological Day was established in 1951 to commemorate the establishment of the World Meteorological Organization on 23 March 1950. This organization announces a slogan for World Meteorological Day every year, and this day is celebrated in all member countries. [1] [2] [3] [4]
The World Meteorological Organisation (WMO), an organization of the United Nations, was created on 23 March 1950 to replace the International Meteorological Organization. It began operations in 1951 to coordinate member nation in the fields of meteorology, operational hydrology, and Earth sciences for the security of their population. The first World Meteorological Day was held on 23 March 1961. [5] [6]
Under are a few of the themes of recent years: [6]
Climate is the long-term weather pattern in a region, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteorological variables that are commonly measured are temperature, humidity, atmospheric pressure, wind, and precipitation. In a broader sense, climate is the state of the components of the climate system, including the atmosphere, hydrosphere, cryosphere, lithosphere and biosphere and the interactions between them. The climate of a location is affected by its latitude, longitude, terrain, altitude, land use and nearby water bodies and their currents.
The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics.
A radiosonde is a battery-powered telemetry instrument carried into the atmosphere usually by a weather balloon that measures various atmospheric parameters and transmits them by radio to a ground receiver. Modern radiosondes measure or calculate the following variables: altitude, pressure, temperature, relative humidity, wind, cosmic ray readings at high altitude and geographical position (latitude/longitude). Radiosondes measuring ozone concentration are known as ozonesondes.
Tropical cyclones and subtropical cyclones are named by various warning centers to simplify communication between forecasters and the general public regarding forecasts, watches and warnings. The names are intended to reduce confusion in the event of concurrent storms in the same basin. Once storms develop sustained wind speeds of more than 33 knots, names are generally assigned to them from predetermined lists, depending on the basin in which they originate. Some tropical depressions are named in the Western Pacific, while tropical cyclones must contain a significant amount of gale-force winds before they are named in the Southern Hemisphere.
The Bureau of Meteorology is an executive agency of the Australian Government responsible for providing weather services to Australia and surrounding areas. It was established in 1906 under the Meteorology Act, and brought together the state meteorological services that existed before then. The states officially transferred their weather recording responsibilities to the Bureau of Meteorology on 1 January 1908.
The climate in Greece is predominantly Mediterranean. However, due to the country's geography, Greece has a wide range of micro-climates and local variations. The Greek mainland is extremely mountainous, making Greece one of the most mountainous countries in Europe. To the west of the Pindus mountain range, the climate is generally wetter and has some maritime features. The east of the Pindus mountain range is generally drier and windier in summer. The highest peak is Mount Olympus, 2,918 metres (9,573 ft). The northern areas of Greece have a transitional climate between the continental, the Mediterranean and the humid subtropical climate. There are mountainous areas that have an alpine climate. Also, various areas of Greece have semi-arid climates.
The climate of Italy is highly diverse. In most of the inland northern and central regions, the climate ranges from humid subtropical to humid continental and oceanic. The climate of the Po valley geographical region is mostly humid subtropical, with cool winters and hot summers. The coastal areas of Liguria, Tuscany and most of the South experience a Mediterranean climate according to the Köppen climate classification.
The climate of Romania is continental, transitioning into humid subtropical on the eastern coast, influenced by polar intrusions, and therefore characterized by harsh winters. The mountain ranges of the Carpathian arc have a cool mountain climate with high humidity throughout the year.
The climate of Ecuador is generally tropical and varies with altitude and region, due to differences in elevation and, to a degree, in proximity to the equator.
Malta has a Subtropical-Mediterranean climate according to the Köppen climate classification (Csa), with very mild winters and warm to hot summers. Rain occurs mainly in winter, with summer being generally dry. According to the Troll-Paffen climate classification and the Siegmund/Frankenberg climate classification, Malta lies within the subtropical zone, being at 35ºN latitude.
The climate of Norway is more temperate than could be expected for such high latitudes. This is mainly due to the North Atlantic Current with its extension, the Norwegian Current, raising the air temperature; the prevailing southwesterlies bringing mild air onshore; and the general southwest–northeast orientation of the coast, which allows the westerlies to penetrate into the Arctic. The January average in Brønnøysund is 15.8C (28.6F) higher than the January average in Nome, Alaska, even though both towns are situated on the west coast of the continents at 65°N. In July the difference is reduced to 3.2C (5.8F). The January average of Yakutsk, in Siberia but slightly further south, is 42.3C (76.1F) lower than in Brønnøysund.
Almost all of Uruguay has a humid subtropical climate. It is fairly uniform nationwide, since the country is located entirely within the temperate zone. Seasonal variations do exist, but extremes in temperature are rare. As would be expected by its abundance of water, high humidity and fog are common. The absence of mountains and other weather barriers makes all locations vulnerable to high winds and rapid changes in weather as fronts or storms sweep across the country. Weather is sometimes humid.
Lia Cruz is a Filipina television host, news and weather anchor, sportscaster, podcaster, writer and producer based in the Philippines.