IR Home
CR
Home
Editors
Forthcoming
Information
Subscribe
CR SPECIAL 1
CR SPECIAL 2
CR SPECIAL 3
CR SPECIAL 4
CR SPECIAL 5
CR SPECIAL 6
CR SPECIAL 7
CR SPECIAL 8
CR SPECIAL 9
CR SPECIAL 10
CR SPECIAL 11
Journals
Home
MEPS
AME
CR
DAO
ESEP
ESR
Search
Subscribe
Book Series
EE Books
Top Books
ESEP Books
Order
EEIU Brochures
(pdf format)
Discussion Forums
Home
Research
IR Research
Institutions
International Ecology Institute
Eco-Ethics International Union
Foundation
Otto Kinne Foundation
 | |
CR 28:221-228 (2005)
|
Abstract
|
Thermal effects of the North Atlantic Oscillation on the cold period of the year in Lithuania
Arunas Bukantis1,*, Galina Bartkeviciene2
1Department of Hydrology and Climatology, Vilnius University, M. K Ciurlionio 21, 03101 Vilnius-9, Lithuania
2Department of Terrestrial Ecosystems, Institute of Ecology, Vilnius University, Akademijos 2, 08412 Vilnius-21,
Lithuania
*Email: arunas.bukantis@gf.vu.lt
ABSTRACT: The impact of the North Atlantic Oscillation (NAO) on long-term air temperature fluctuations in Lithuania was studied for the period 1865 to 2000. Mean monthly values of 2 NAO indices (NAO-1, NAO-2) and air temperatures at 9 Lithuanian
meteorological stations were used as references. Synoptic situations, as well as the mean sea level pressure (SLP) and 500 hPa geopotential height field of a total of 265 months, were analysed. NAO conditions were classified as positive, negative or
neutral. air temperature fluctuations in Lithuania during the cold period of the year (November to March) are positively correlated with fluctuations of the NAO indices. During periods of extreme NAO indices (| I | > ±1.5σ),
a negative NAO phase is usually correlated (75 to 88% of the cases) to negative temperature anomalies, whereas a positive NAO phase is correlated to positive temperature anomalies. In the other cases, reserve impact of positive and negative NAO patterns,
the relation between NAO phases and regional temerature anomalies is opposite or not detectable . Also, this study includes the analysis of atypical periods of NAO like circulation: when positive NAO phase was related to negative temperature anomalies and
negative NAO phaase to positive temperature anomalies in Lithuania.
KEY WORDS: NAO · Indices · temperature anomaly · Lithuania · synoptic climatology
Full text in pdf format
Published in CR Vol.
28, No. 3
(2005) on May 24
Print ISSN: 0936-577X; Online ISSN: 1616-1572.
Copyright © Inter-Research, Oldendorf/Luhe, 2005
|
