The global climate of March-May 1991: Anomalous low-frequency fluctuations domiante the midlatitudes; ENSO becomes established in the tropics

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Journal of Climate; (United States)

OSTI ID:5522569

Bell, G D; Halpert, M S ^[1]

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1. NWS/NMC/NOAA, Washington, DC (United States)

Positive sea surface temperatures (SST) anomalies increased and spread throughout the central and eastern equatorial Pacific during April and May 1991, the largest since the 1986-87 ENSO event and accompanied by sharp decreases in the ENSO index during March-May 1991. All atmospheric and oceanic indices indicated the initial stages of ENSO by the end of the season. Persistent circulation anomalies were observed in both the Northern and Southern hemispheres extratropics. Mean seasonal temperatures were above normal over many land regions, continuing a trend of warmer than normal March-May globally that began in the early 1980's. 6 refs., 26 figs., 1 tab.

• OSTI ID: 5522569
• Journal Information: Journal of Climate; (United States), Journal Name: Journal of Climate; (United States) Vol. 6:7; ISSN JLCLEL; ISSN 0894-8755
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
540310 -- Environment
Aquatic-- Basic Studies-- (1990-)
AMBIENT TEMPERATURE
ANNUAL VARIATIONS
ATMOSPHERIC CIRCULATION
CLIMATES
GLOBAL ASPECTS
OCEANIC CIRCULATION
SEASONAL VARIATIONS
SOUTHERN OSCILLATION
VARIATIONS