wind speed anomalies...wind trends bulletin in the ﬁ nal quarter of 2013, winds were generally...

Wind Trends Bulletin

In the fi nal quarter of 2013, winds

were generally below normal relative

to the long-term fourth quarter

average (1988 – 2012) across western

North America, Central America, the

Mediterranean and Black Seas, and

central portions of Asia and Africa.

Winds were above normal across

northwest Canada, the Arabian

Peninsula, India, and the northern

portions of South America, Europe,

and Asia.

Changes in global atmospheric

circulation drove two dominant

wind speed anomaly features of

the fourth quarter. Persistently high

pressure over the North Pacifi c was

associated with below-normal wind

speeds along the western coast of

North America. Meanwhile, the Arctic

Oscillation index transitioned from

neutral to strongly positive, indicative

of a more northerly European winter

storm track. This brought stronger

than average winds to northern

Europe and depressed winds in the

Mediterranean.

Elsewhere, strongly positive wind

speed anomalies persisted over

northern South America and areas

of the Middle East. In India, positive

wind speed anomalies spread from

the southern states to include most of

the country.

The Wind Trends Bulletin is a free report that evaluates deviations in global wind conditions from the historical norm on a quarterly basis. The maps contained in this report were derived from the ERA-Interim reanalysis dataset (Dee, D.P., et al, 2011) . The anomalies are calculated as a percent deviation from the 1988 – 2012 mean speed at 100m above ground level for the calendar quarter. For more information about customized analyses for your project portfolio, data or subscription options, please contact us at [email protected].

wind speed anomalies

Q4 2013 - Global Wind Anomalies

USA • SPAIN • INDIA • BRAZIL

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Areas with below-average winds:

• Northwest United States

• Coastal British Columbia

• The Hawaiian Islands

• Central America

• New England and the Canadian

Maritimes

• Nunavut

Areas with above-average winds:

• Interior Alaska

• Northern Yukon and the Northwest

Territories

• Isthmus of Tehuantepec, Mexico

• Eastern Caribbean



Q4 2013 - North America





• Bolivia

• Northern Patagonia


• Northern Brazil and Amazonia

• Interior Venezuela

• Southern Patagonia and the

Falkland Islands



Q4 2013 - South America





• The Balkan Peninsula

• Southern Ukraine

• Southern Italy and Sicily

• Southern Iberian Peninsula

• Much of Iceland


• Scandinavia and Finland

• The British Isles and North Sea

• The French and Italian Alps

• Southern Turkey

• Northern Iberian Peninsula



Q4 2013 - Europe





• Interior Eastern Africa

• Sahel

• Eastern Madagascar

• Northern Botswana and southern

Zambia


• Arabian Peninsula and Persian Gulf

• Egypt

• Northern Syria and Iraq

• Western Sahara

• Central DR Congo



Q4 2013 - Africa and the Middle East

USA• SPAIN • INDIA • BRAZIL




• Central China

• Much of Mongolia

• Pakistan

• Northern Philippines


• Northern Kazakhstan

• Most of India, excluding Gujarat and

western Maharashtra

• South Korea and southern Japan

• Southern Tibet

• Taiwan

• Portions of Southeast Asia



Q4 2013 - Asia

USA• SPAIN • INDIA • BRAZIL




• Much of Sumatra

• Solomon Islands and New Britain

• New Zealand, notably the North

Island


• Borneo and Java

• Southern Papua New Guinea and

the Torres Strait

• Interior eastern Australia

• Tasmania



Q4 2013 - Oceania



wind speed anomalies...wind trends bulletin in the ﬁ nal quarter of 2013, winds were generally...

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