| 释义 |
La Niña, n. Oceanogr. and Climatol.
Brit. |la ˈniːnjə|, U.S. |lɑ ˈninjə|
[‹ Spanish la niña the girl (> n.), after El Niño n.]
A period of sustained lower-than-normal sea-surface temperatures across the central and eastern equatorial Pacific, occurring at irregular intervals; the climatic and ecological phenomena which occur during such a period.
La Niña events often occur (but not always) in association with El Niño events.
1981O. Guillen et al. in M. H. Glantz & J. D. Thompson Resource Managem. & Environmental Uncertainty ix. 266 Negative anomalies of less than 2°C have also negative effects on the primary production (‘La Niña’?). 1985G. Philander in Jrnl. Atmospheric Sci. 42 2652 The term La Niña is apposite for these cold periods because oceanographic and meteorological conditions during El Niño and La Niña are highly complementary. 1989New Scientist 11 Feb. 33/2 During La Niña events, the normal winds and currents of the Pacific operate with extra vigour and the main body of water in the ocean cools. 1990Reader's Digest June 147/2 Scientists..have begun linking the flood cycles to a system of air and sea currents known as La Niña. 2002G. Bankoff Cultures of Disaster vii. 137 Rainfall from October till the end of 1998 was near normal but continued and intensified into the following year consistent with a La Niña cold episode. 2003Chicago Tribune (Midwest ed.) 13 June ii. 10/4 Chicago may be in for a significant summer temperature turnaround if trends observed in previous La Niña years over more than half a century repeat. |