| dbo:abstract |
The historical and ongoing droughts in California result from various complex meteorological phenomena, some of which are not fully understood by scientists. Drought is generally defined as “a deficiency of precipitation over an extended period of time (usually a season or more), resulting in a water shortage.” A lack of rainfall (or snowfall) or precipitation in meager quantities, higher than average temperatures and dry air masses in the atmosphere commonly underlie drought conditions; these natural factors are further complicated by increases in populations and water demands. Since the California water supply is attained from numerous sources, fulfilled by varied and intricate weather patterns, there is no one cause of drought. California is not only the most populous state and largest agricultural producer in the United States, it is also the most biodiverse; as such, drought in California can have a far reaching economic and environmental impacts. There are five major categories of drought: (1) Meteorological, (2) Agricultural, (3) Hydrological, (4) Socioeconomic, and (5) Ecological. A meteorological drought may be short lived without causing disturbance; but when longer lasting may enter other categories according to its impacts. Precipitation in California occurs from November to May, with the vast majority of rain and snowfall occurring in the winter months across the state. This delicate balance means that a dry rainy season can have lasting consequences. (en) Tout au long de l'histoire, la Californie a connu de nombreuses sécheresses, telles 1841, 1864, 1924, 1928–1935, 1947–1950, 1959–1960, 1976–1977, 1986–1992, 2006–2010 et 2011–2019. État le plus peuplé des États-Unis et producteur agricole majeur, la sécheresse en Californie peut avoir un impact économique et environnemental grave. La sécheresse peut être due uniquement ou associée à des conditions météorologiques; des actions économiques ou politiques; la population et l'agriculture. (fr) |
| rdfs:comment |
Tout au long de l'histoire, la Californie a connu de nombreuses sécheresses, telles 1841, 1864, 1924, 1928–1935, 1947–1950, 1959–1960, 1976–1977, 1986–1992, 2006–2010 et 2011–2019. État le plus peuplé des États-Unis et producteur agricole majeur, la sécheresse en Californie peut avoir un impact économique et environnemental grave. La sécheresse peut être due uniquement ou associée à des conditions météorologiques; des actions économiques ou politiques; la population et l'agriculture. (fr) The historical and ongoing droughts in California result from various complex meteorological phenomena, some of which are not fully understood by scientists. Drought is generally defined as “a deficiency of precipitation over an extended period of time (usually a season or more), resulting in a water shortage.” There are five major categories of drought: (1) Meteorological, (2) Agricultural, (3) Hydrological, (4) Socioeconomic, and (5) Ecological. A meteorological drought may be short lived without causing disturbance; but when longer lasting may enter other categories according to its impacts. (en) |
