A dewpoint, or condensation, hygrometer is another common way to measure the humidity.
Such an instrument has a mirror that exposed to the open air, and which can be cooled as precise track is kept of the mirror's temperature. As the mirror cools, dew (or frost if the temperature is below freezing) will form on it. The temperature at which this happens is the air's dew point (or frost point in below-freezing air). (source)
There are seven tropical cyclone "basins" where tropical cyclones form on a regular basis.
Northeast Pacific basin
Northwest Pacific basin
North Indian basin
Southwest Indian basin
Southeast Indian/Australian basin
Australian/Southwest Pacific basin
You can watch a Tropical Cyclone Formation Probability from the NOAA webpage...
The Sahara's climate consists of basically two sub-climates, a dry subtropical climate in the north and a dry tropical climate in the south. The dry tropical climate is generally characterized by mild, dry winters, a hot dry season just before the rainy season, and an annual temperature cycle.
Temperatures are high, with monthly means in the range 21–32 °C (70–90 °F). Daily temperature variations are extreme. Ranges of 35 °C (63 °F) are not unknown when daytime maxima in excess of 40 °C (104 °F). source
These desert climates are found in low-latitude deserts approximately between 18° to 28° in both hemispheres. these latitude belts are centered on the tropics of Cancer and Capricorn, which lie just north and south of the equator. The dry arid desert is a true desert climate, and covers 12 % of the Earth's land surface.
Temperature Range: 16° C
Annual Precipitation: 0.25 cm (0.1 in). All months less than 0.25 cm (0.1 in).
Latitude Range: 15° - 25° N and S.
Global Range: southwestern United States and northern Mexico; Argentina; north Africa; south Africa; central part of Australia. (source)
One of the oldest and largest deserts, the Namib stretches inland from the Atlantic Ocean, covering large swathes of Namibia and parts of Angola and South Africa. This arid hotspot surprisingly supports a diverse number of plants and animals, some of which are found nowhere else in the world. The Namib region is highlighted in yellow.
Throughout this vast and unforgiving landscape, a number of animals and plants have adapted to life here, including the mountain zebra (Equus zebra), gemsbok (Oryx Gazella), short-eared elephant shrew (Macroscelides proboscideus), Grant's golden mole (Eremitalpa granti), Karoo bustard (Eupodotis vigorsii) and Peringuey's adder (Bitis peringueyi).
There is also an extraordinary diversity of succulent plants, as well as the shrub-like Welwitschia mirabilis, which has only 2 leaves and can live for over 1,000 years!
Weather is the day-to-day state of the atmosphere, and its short-term (minutes to weeks) variation. Popularly, weather is thought of as the combination of temperature, humidity, precipitation, cloudiness, visibility, and wind. We talk about the weather in terms of "What will it be like today?", "How hot is it right now?"
Climate is defined as statistical weather information that describes the variation of weather at a given place for a specified interval. More formally it is the weather of a locality averaged over some period (usually 30 years) plus statistics of weather extremes.
Nifty definition : Climate is what you expect, weather is what you get.
Cyclone Nargis moved across southern Myanmar on the evening of May 2, 2008, leaving a trail of death and destruction before petering out the next day. It devastated much of the fertile Irrawaddy Delta and Yangon, the nation's main city. Nearly 85,000 people died.
The Government of Myanmar, the Association of Southeast Asian Nations (ASEAN) and the United Nations in the first comprehensive report inputs
- It estimates the cyclone killed over 84,530 people, with a further 53,836 still reported missing.
- The cyclone wiped out the livelihoods of families overnight, flooding over 600,000 hectares of agricultural land, killing up to 50 per cent of draught animals, destroying fishing boats and sweeping away food stocks and agricultural implements.
- in mid-June, 55 per cent reported having only one day of food stocks or less, and have relied in part on the steady flow of relief supplies.
- The total economic losses amount to about 2.7% of the projected 2008 GDP, with the effects of the cyclone concentrated on a region important for agriculture and fishing in Myanmar. source
The vast Namib Sand Sea, which covers roughly 13,125 square miles (34,000 square kilometers) along the coast of Namibia, is one of the world's oldest and largest sand deserts.
The major threats to environment and biodiversity along the coast are in particular:
At a weather station 4 thermometers are kept in a white slatted box called a Stevenson Screen.
Pressure is an idea scientists use to describe how gases and liquids "push" on things. If you imagine a column of air that is 1 inch square and goes from the Earth's surface all the way up through the atmosphere, the pressure of the air in that column is 14.7 pounds per square inch. Now that may seem like a lot of pressure pressing down on your body if you think of how many square inches it takes to cover your body!
Fact : Air pressure changes with the weather. In fact, it's one of the most important factors that determines what the weather is like. You can do some basic weather forecasting by using the wind and barometric pressure. (source)
Clouds are classified according to their height above and appearance (texture) from the ground. The following cloud roots and translations summarize the components of this classification system 1) Cirro-: curl of hair, high. 2) Alto-: mid. 3) Strato-: layer. 4) Nimbo-: rain, precipitation. 5) Cumulo-: heap.
This is the dense forest that stradddles the borders of Brunei, Indonesia and Malaysia on the island of Borneo.Here one finds such endangered species as the:
Welwitschia Mirabilis comprises of only two leaves that continue to grow from a seedling throughout its life. These leaves are leathery, broad and lie along the ground. In time the two leaves become shredded and tattered by the wind, eventually making the plant look as if it has many frayed leaves.
Welwitschia is thought to be a species of desert flora that is a living relic from the Jurassic period when gymnosperms were the dominant land plants in the age of dinosaurs. Welwitschia are certainly plant survivors in an incredibly harsh and arid desert climate
source : Suite101
Namibia is one of the world’s largest producers of gem quality diamonds, with about 98% of diamonds produced being gem quality. Namibia produced a total of 1.4 Mct in 2003. In 2003 it was estimated that onshore operations account for about 55% of production and offshore operations for 45% operations.
It is estimated that over 100 Mct have been produced since mining began in 1908. Diamonds are mined along ancient river terraces along the banks of the Orange River, palaeo beach deposits along the south western and western coast of Namibia, as well as from marine deposits situated offshore. Namibia has the richest marine diamond deposits in the world, with an estimated reserve of over 1.5 billion carats.