วันพฤหัสบดีที่ 31 พฤษภาคม พ.ศ. 2555

Diana, Princess of Wales


Diana, Princess of Wales (Diana Frances;[N 1] née Spencer; 1 July 1961 – 31 August 1997), was the first wife of Charles, Prince of Wales, whom she married on 29 July 1981, and member of the British Royal Family[2]. She was also well known for her fund-raising work for international charities, and an eminent celebrity of the late 20th century. Her wedding to Charles, heir to the British throne and those of the 16 Commonwealth realms, was held at St Paul's Cathedral and seen by a global television audience of over 750 million. While married she bore the courtesy titles Princess of Wales, Duchess of Cornwall, Duchess of Rothesay, Countess of Chester and Baroness of Renfrew. The marriage produced two sons, the princes William and Harry,[3] currently second and third in line to the throne, respectively.




Diana was born into an aristocratic English family with royal ancestry and became a public figure with the announcement of her engagement to Prince Charles. Diana also received recognition for her charity work and for her support of the International Campaign to Ban Landmines. From 1989, she was the president of the Great Ormond Street Hospital for children, in addition to dozens of other charities. She remained the object of worldwide media scrutiny during and after her marriage, which ended in divorce on 28 August 1996. Media attention and public mourning were considerable after her death in a car crash in Paris on 31 August 1997.

วันพฤหัสบดีที่ 24 พฤษภาคม พ.ศ. 2555

Wet season




The wet season, or rainy season, is the time of year, covering one or more months, when most of the average annual rainfall in a region occurs. The term green season is also sometimes used as a euphemism by tourist authorities. Areas with wet seasons are dispersed across portions of the tropics and subtropics. Under the Koppen climate classification, for tropical climates, a wet season month is defined as a month where average precipitation is 60 millimetres (2.4 in) or more.  In contrast to areas with savanna climates and monsoon regimes, mediterranean climates have wet winters and dry summers. Tropical rainforests technically do not have dry or wet seasons, since their rainfall is equally distributed throughout the year. Some areas with pronounced rainy seasons will see a break in rainfall mid-season, when the intertropical convergence zone or monsoon trough moves poleward of their location during the middle of the warm season.
When the wet season occurs during a warm season, or summer, precipitation falls mainly during the late afternoon and early evening hours. The wet season is a time when air quality improves, freshwater quality improves, and vegetation grows substantially, leading to crop yields late in the season. Floods cause rivers to overflow their banks, and some animals to retreat to higher ground. Soil nutrients diminish and erosion increases. The incidence of malaria increases in areas where the rainy season coincides with high temperatures. Animals have adaptation and survival strategies for the wetter regime. Often, the previous dry season leads to food shortages in the wet season, as the crops have yet to mature.

Character of the rainfall
In areas where the heavy rainfall is associated with a wind shift, the wet season becomes known as the monsoon. Since rainfall during the wet season is predominantly due to daytime heating which leads to diurnal thunderstorm activity within a pre-existing moist airmass, rainfall is mainly focused during the late afternoon and early evening hours within savannah and monsoon regimes. This also leads to much of the total rainfall each day falling during the initial minutes of the downpour, before the storms mature into their stratiform stage.[8] While most locations have only one wet season, areas of the tropics can experience two wet seasons as the monsoon trough, or Intertropical Convergence Zone, can pass over locations in the tropics twice per year. Since rain forests have equitable rainfall throughout the year, they do not technically have a wet season.
The situation is different for locations within the Mediterranean climate regime. In the western United States, during the cold season from September through May, extratropical cyclones from the Pacific ocean move inland into the region due to a southward migration of the jet stream during the cold season. This shift in the jet stream brings much of the annual precipitation to the region, and also brings the potential for heavy rain and strong low pressure systems. The peninsula of Italy experiences very similar weather to the western United States in this regard



Areas affected
Areas with a savanna climate in Sub-Saharan Africa, such as Ghana, Burkina Faso, Darfur, Eritrea, Ethiopia, and Botswana have a distinct rainy season. Also within the savannah climate regime, Florida and East Texas have a rainy season. Monsoon regions include southeast Asia (including Indonesia and Philippines), northern sections of Australia's North, Polynesia, Central America,western and southern Mexico, the Desert Southwest of the United States, southern Guyana, portions of northeast Brazil.
Northern Guyana experiences two wet seasons: one in late spring and the other in early winter. In western Africa, there are two rainy seasons across southern sections with only one across the north. Within the Mediterranean climate regime, the west coast of the United States and the Mediterranean coastline of Italy, Greece, and Turkey experience a wet season in the winter months. Similarly, the wet season in the Negev desert of Israel extends from October through May. At the boundary between the Mediterranean and monsoon climates lies the Sonoran desert, which receives the two rainy seasons associated with each climate regime. The wet season is known by many different local names throughout the world. For example, the wet season period of the year in Mexico is known as storm season, with other tropical locations across the globe giving the wet season period of the year in the area they live a name in the local language of the area. Arguably, the most notable example of this is found in the list of names given to the various short "seasons" of the year by the Aboriginal tribes of Northern Australia: the name given to the wet season typically experienced in Northern Australia from December to March by the various Aboriginal tribes living in the region is Gudjewg. The precise meaning of the word is fairly disputable, although it's widely accepted to relate to the severe thunderstorms, flooding, and abundant vegetation growth commonly experienced at this time.



The wet season, or rainy season, is the time of year, covering one or more months, when most of the average annualrainfall in a region occurs. The term green season is also sometimes used as a euphemism by tourist authorities.Areas with wet seasons are dispersed across portions of the tropics and subtropics. Under the Koppen climate classification, for tropical climates, a wet season month is defined as a month where average precipitation is 60 millimetres (2.4 in) or more.  In contrast to areas with savanna climates and monsoon regimes, mediterranean climates have wet winters and dry summers. Tropical rainforests technically do not have dry or wet seasons, since their rainfall is equally distributed throughout the year. Some areas with pronounced rainy seasons will see a break in rainfall mid-season, when the intertropical convergence zone or monsoon trough moves poleward of their location during the middle of the warm season.[6]
When the wet season occurs during a warm season, or summerprecipitation falls mainly during the late afternoon and early evening hours. The wet season is a time when air quality improves, freshwater quality improves, and vegetation grows substantially, leading to crop yields late in the season. Floods cause rivers to overflow their banks, and some animals to retreat to higher ground. Soil nutrients diminish and erosion increases. The incidence of malaria increases in areas where the rainy season coincides with high temperatures. Animals have adaptation and survival strategies for the wetter regime. Often, the previous dry season leads to food shortages in the wet season, as the crops have yet to mature.