The 2004 year confirms global warming
Keywords: global warming, global warming, greenhouse effect, pollution, CO2.
The World Meteorological Organization has just published a first state of the global climate for the year 2004, which will be completed in March 2005 when the December data are known.
According to the international organization, the global warming continues, because the average temperature at the Earth's surface has increased 0,44 ° C compared to an average of 14 ° C (determined between 1961 and 1990). These features make 2004 the fourth warmest year since 1861, 2003 just behind (+ 0,49 ° C).
The 1998 year remains in the forefront with a temperature of 0,54 ° C above the average. In general, the last ten years (1995 2005 to) - with the exception of 1996 - are among the hottest known since the existence of weather records.
However, on our planet, disparities remain law. Meteorologists have observed heat waves in June and July on the south of Spain, Portugal and Romania, with temperatures that reached 40 ° C.
Japan and Australia also experienced very high temperatures. In contrast, abnormal cold that occurred in July in the Andes of southern Peru has killed people 92
2004 has also seen its attendant droughts and floods. Earlier this year, the very dry weather continued to affect eastern South Africa, Mozambique, Lesotho and Swaziland.
The rainy season from March to May was shorter with less precipitation compared to normal in the greater Horn of Africa, which led to a water shortage in the region. So some parts of Uganda experienced the worst drought in 1961, and Kenya, early end of the rains increased again endemic drought resulting from several years of poor rains. Thus, agricultural production in the country decreased by about 40%. Furthermore, a severe drought continues to plague Afghanistan, southern China, southern and eastern Australia.
Yet 2004 of rainfall was above average, since 2004 year is the wettest year since 2000. The Asian monsoon from June to September and has led to heavy rains and flooding in northern India, Nepal and Bangladesh,
leaving millions of people homeless and killing 1 800 of them. The east and south China have also experienced flooding and landslides that resulted in the deaths of over a thousand Chinese.
Heavy rainfall also hit Brazil, Angola, Botswana, Namibia and some Australian states. The responsibility for these disasters is not the El Niño weather phenomenon. The latter began to spring up between July and November. But it looks pretty placid.
For cons, the number and intensity of storms and tropical cyclones that originate in the Atlantic between July and November was particularly important. During this period, five tropical storms have developed, instead of ten on average, eight focused on the month of August, which is a record for this period. Six tropical cyclones with winds over 300 km / h crossed the Caribbean and the southern United States.
During his visit to Haiti, tropical storm Jeanne caused flooding and landslides that killed three thousand people. In contrast, the tropical storm season in the eastern north Pacific was calmer. Only twelve storms have arisen, as he creates an average of over sixteen each year.
Amid this catalog Prévert, good news: the ozone hole that installs every year the Antarctic was the smallest since a decade. It reached its maximum size (19,6 million km2) in late September and disappeared earlier than usual, in mid-November.
More heat, but less excess
According to the latest figures provided by Météo France, 2004 looks in metropolitan France as slightly warmer than normal of about 0,5 ° C. Although none months do not appear exceptional anomaly, June and October, however, are those where the temperature differences are most pronounced, as they were hotter than normal of about 1,5 and 1,7 degrees. With an average temperature should be around 12,2 ° C, the 2004 year will, in France, at eighth among the hottest years of the last decade. Regarding rainfall, cumulative records are pretty close to normal over most of the country rather excess of Brittany, the Centre and the Roussillon, and rather deficient elsewhere, particularly in the Southeast. In total, 2004 year is as calmer than the previous year as it experienced no weather event of the magnitude of the heat wave and drought observed in 2003.
Christiane Galus, Source: Le Monde