18th September 2012 Clim. of the month, summer 2012 1

Climate of the monthJuly-August 2012

Isabel Andreu-Burillo

with the help of Virginie, Fabian, Mingu and Oriol

CFU

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This summer, in Barcelona

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Summer 2012 in Barcelona

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Summer 2012 in Barcelona

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http://assignmentportals.com/2012/08/06/earth%E2%80%99s-revolution-around-sun/

September 22nd 2012 @14:49 UTC

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Autumn 2012

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Autumn 2012

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Tropical Pacific

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ENSO-neutral conditions continued during August 2012

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SST, August 2012

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August 2012

Nino

Nina

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Change in regime?

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Pacific Sea Level Pressure

Nino

Nina

Nino

Nina

18th September 2012 Clim. of the month, summer 2012 15Winds 2012 (CDAS/reanalysis) 1981-2010

Easterly trade winds remained slightly enhanced over the west-central equatorial Pacific, slightly weaker than average across the east-central equatorial Pacific.no clear atmospheric response to the positive SST anomalies.

Enhanced convection across Indonesia=>the atmospheric circulation is not yet reflecting El Niño.

Oceanic and atmospheric anomalies reflect ENSO-neutral conditions.

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Niño 3

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Niño 3.4

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Some highlights

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North Atlantic and Europe

The 500-hPa circulation during August featured a continued negative phase (-1.4) of the NAO: persistent positive height anomalies over Greenland and negative height anomalies over the eastern North Atlantic.

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Precipitation 2012

above-average precipitation over Great Britain, below-average precipitation in Southern Europe

well above-average temperatures across southern Europe, anomalous warmth extending eastward into southwestern Russia

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Precipitation 2012

Dipole of precipitation in South America.

Very high temperature anomalies in Eastern South America.

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African Sahel

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African SahelMonsoon was again enhanced during August 2012: well above-average precipitation across the African Sahel and Sudan regions.West African Monsoon area-averaged precipitation totals above-average since May.

Overall, the west African monsoon system has been enhanced since 1995, in association with the warm phase of the Atlantic Multi-decadal Oscillation (AMO).

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Antarctic O3 hole

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Antarctic Ozone hole

By the end of August 2012, the ozone hole spanned only 4 million square kilometers, far smaller than the 2002-2011 mean of 18 million square kilometers.

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right now….

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Sources and Acknowledgements

• http://www.cpc.ncep.noaa.gov/products/CDB/index.shtml• http://www.ecmwf.int/products/forecasts/d/charts/season

al/forecast/seasonal_range_forecast• http://iridl.ldeo.columbia.edu/maproom/.ENSO/• http://www.nhc.noaa.gov/gtwo_atl.shtml• http://www.prh.noaa.gov/hnl/cphc/• http://www.aemet.es/es/serviciosclimaticos/vigilancia_cli

ma• http://assignmentportals.com/2012/08/06/earth%E2%80

%99s-revolution-around-sun/

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Thank you!