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المشاركة الأصلية بواسطة : برق الربيع فى نجد |
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وش اخر الاخبار
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أخر الاخبار للأسف غير جيدة:
La Niña remains moderate to strong
لانينا مابين قوية إلى متوسطه
Moderate to strong La Niña conditions remain in place across the tropical Pacific. Long-range models surveyed by the Bureau suggest that this La Niña event will persist into at least early 2011.
All ENSO indicators continue to exceed La Niña thresholds. The tropical Pacific Ocean remains significantly cooler than average for this time of year, with NINO indices recording their lowest October values since the La Niña event of 1988. Below the Pacific Ocean surface, temperatures are up to 4°C cooler than normal. The SOI remains very high, equalling its record October monthly value of +18. Trade winds remain stronger than average across the central and western equatorial Pacific and cloudiness near the date-line continues to be suppressed.
La Niña periods are generally associated with above normal rainfall during the second half of the year across large parts of Australia, most notably eastern and northern regions. The 2010 event has contributed to Australia’s wettest August to October period on record. Night time temperatures are historically warmer than average and Tropical Cyclone occurrence for northern Australia is typically higher than normal during the cyclone season (November-April). The first Australian Tropical Cyclone of this season (TC Anggrek) formed in late October, east of the Cocos (Keeling) Islands.
The Indian Ocean Dipole is following its normal cycle of decay in the late spring/early summer period, and is currently close to zero.
10-24-2010, 01:26 AM
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