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Continentality and Oceanity in the Mid and High Latitudes of the Northern Hemisphere and Their Links to Atmospheric Circulation
- Source :
- Advances in Meteorology, Vol 2018 (2018), Advances in meteorology, London : Hindawi LTD, 2018, vol. 2018, art no 574619, [p. 1-12]
- Publication Year :
- 2018
- Publisher :
- Hindawi Limited, 2018.
-
Abstract
- The climate continentality or oceanity is one of the main characteristics of the local climatic conditions, which varies with global and regional climate change. This paper analyzes indexes of continentality and oceanity, as well as their variations in the middle and high latitudes of the Northern Hemisphere in the period 1950–2015. Climatology and changes in continentality and oceanity are examined using Conrad’s Continentality Index (CCI) and Kerner’s Oceanity Index (KOI). The impact of Northern Hemisphere teleconnection patterns on continentality/oceanity conditions was also evaluated. According to CCI, continentality is more significant in Northeast Siberia and lower along the Pacific coast of North America as well as in coastal areas in the northern part of the Atlantic Ocean. However, according to KOI, areas of high continentality do not precisely correspond with those of low oceanity, appearing to the south and west of those identified by CCI. The spatial patterns of changes in continentality thus seem to be different. According to CCI, a statistically significant increase in continentality has only been found in Northeast Siberia. In contrast, in the western part of North America and the majority of Asia, continentality has weakened. According to KOI, the climate has become increasingly continental in Northern Europe and the majority of North America and East Asia. Oceanity has increased in the Canadian Arctic Archipelago and in some parts of the Mediterranean region. Changes in continentality were primarily related to the increased temperature of the coldest month as a consequence of changes in atmospheric circulation: the positive phase of North Atlantic Oscillation (NAO) and East Atlantic (EA) patterns has dominated in winter in recent decades. Trends in oceanity may be connected with the diminishing extent of seasonal sea ice and an associated increase in sea surface temperature.
- Subjects :
- Atmospheric Science
Humid continental climate
Article Subject
010504 meteorology & atmospheric sciences
Atmospheric circulation
0208 environmental biotechnology
Northern Hemisphere
Climate change
02 engineering and technology
lcsh:QC851-999
continentality
atmospheric circulation
climate change
01 natural sciences
Pollution
020801 environmental engineering
Sea surface temperature
Geophysics
Geography
Arctic
North Atlantic oscillation
Climatology
lcsh:Meteorology. Climatology
0105 earth and related environmental sciences
Teleconnection
Subjects
Details
- Language :
- English
- ISSN :
- 16879317 and 16879309
- Volume :
- 2018
- Database :
- OpenAIRE
- Journal :
- Advances in Meteorology
- Accession number :
- edsair.doi.dedup.....c82286d92fb686d73f1e9d76f4859c8e