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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.35 [2006] >
IJMS Vol.35(3) [September 2006] >
| Title: | North Atlantic Oscillation and northern hemispheric warming |
| Authors: | Kakade, S.B.
Dugam, S.S. |
| Keywords: | NAO
Snow-cover
Northern hemisphere temperature
SST
Warming
Land-ocean temperature
Thermal contrast |
| Issue Date: | Sep-2006 |
| Publisher: | CSIR |
| Abstract: | In this paper, the effect of Winter-NAO on northern hemispheric temperature and snow-cover is studied because North Atlantic Oscillation (NAO) fluctuations are strongest in the winter season. The correlation analysis, for the period
1973-2003, suggests that winter-NAO is inversely associated with Northern hemispheric snow-cover from winter through summer and the correlation coefficients are significant at 5% level. Moreover, NAO is showing direct relationship with northern hemispheric temperature during winter season. This relationship is also significant at 5% level. The stability of this relationship is tested and found to be stable. The correlation analysis further suggests that winter-NAO and global temperature difference between land and ocean have direct association, which is significant at 5% level. The effect of rising trend in winter-NAO may have resulted in decreasing northern hemispheric snow-cover, which ultimately results in warming of northern hemispheric temperature. The study suggests that NAO plays an important role in warming of northern hemisphere through decreasing northern hemispheric snow-cover extent. |
| Page(s): | 205-209 |
| ISSN: | 0379-5136 |
| Source: | IJMS Vol.35(3) [September 2006]
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