Climate of the month July-August 2012

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Climate of the month July-August 2012. Isabel Andreu-Burillo with the help of Virginie, Fabian, Mingu and Oriol CFU. This summer, in Barcelona. Summer 2012 in Barcelona. Summer 2012 in Barcelona. September 22 nd 2012 @ 14:49 UTC. - PowerPoint PPT Presentation

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<ul><li><p>Climate of the monthJuly-August 2012Isabel Andreu-Burillowith the help of Virginie, Fabian, Mingu and OriolCFU</p><p>Clim. of the month, summer 2012</p></li><li><p>This summer, in Barcelona</p><p>Clim. of the month, summer 2012</p></li><li><p>Summer 2012 in Barcelona</p><p>Clim. of the month, summer 2012</p></li><li><p>Summer 2012 in Barcelona</p><p>Clim. of the month, summer 2012</p></li><li><p>http://assignmentportals.com/2012/08/06/earth%E2%80%99s-revolution-around-sun/September 22nd 2012 @14:49 UTC</p><p>Clim. of the month, summer 2012</p></li><li><p>Autumn 2012</p><p>Clim. of the month, summer 2012</p></li><li><p>Autumn 2012</p><p>Clim. of the month, summer 2012</p></li><li><p>Tropical Pacific</p><p>Clim. of the month, summer 2012</p></li><li><p>ENSO-neutral conditions continued during August 2012http://www.cpc.ncep.noaa.gov/products/CDB/Tropics/tropics.shtml</p><p>Clim. of the month, summer 2012</p></li><li><p>SST, August 2012 </p><p>Clim. of the month, summer 2012</p></li><li><p>August 2012NinoNina</p><p>Clim. of the month, summer 2012</p></li><li><p>OLR</p><p>Clim. of the month, summer 2012</p></li><li><p>Change in regime?</p><p>Clim. of the month, summer 2012</p></li><li><p>Pacific Sea Level PressureNinoNinaNinoNina</p><p>Clim. of the month, summer 2012</p></li><li><p>Winds 2012 (CDAS/reanalysis) 1981-2010Easterly 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.</p><p>Enhanced convection across Indonesia=&gt;the atmospheric circulation is not yet reflecting El Nio.</p><p>Oceanic and atmospheric anomalies reflect ENSO-neutral conditions. </p><p>Clim. of the month, summer 2012</p></li><li><p>Nio 3</p><p>Clim. of the month, summer 2012</p></li><li><p>Nio 3.4</p><p>Clim. of the month, summer 2012</p></li><li><p>1993-2010this monthmonths anomalies</p><p>Clim. of the month, summer 2012</p></li><li><p>Some highlights</p><p>Clim. of the month, summer 2012</p></li><li><p>North Atlantic and Europe</p><p>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.</p><p>Clim. of the month, summer 2012</p></li><li><p>Precipitation 2012above-average precipitation over Great Britain, below-average precipitation in Southern Europewell above-average temperatures across southern Europe, anomalous warmth extending eastward into southwestern Russia</p><p>Clim. of the month, summer 2012</p></li><li><p>Precipitation 2012Dipole of precipitation in South America.Very high temperature anomalies in Eastern South America.</p><p>Clim. of the month, summer 2012</p></li><li><p>Clim. of the month, summer 2012</p></li><li><p>African Sahel</p><p>Clim. of the month, summer 2012</p></li><li><p>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).</p><p>Clim. of the month, summer 2012</p></li><li><p>Antarctic O3 hole</p><p>Clim. of the month, summer 2012</p></li><li><p>Antarctic Ozone holeBy 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.</p><p>Clim. of the month, summer 2012</p></li><li><p>Clim. of the month, summer 2012</p></li><li><p>right now.</p><p>Clim. of the month, summer 2012</p></li><li><p>Clim. of the month, summer 2012</p></li><li><p>Clim. of the month, summer 2012</p></li><li><p>Sources and Acknowledgementshttp://www.cpc.ncep.noaa.gov/products/CDB/index.shtmlhttp://www.ecmwf.int/products/forecasts/d/charts/seasonal/forecast/seasonal_range_forecasthttp://iridl.ldeo.columbia.edu/maproom/.ENSO/http://www.nhc.noaa.gov/gtwo_atl.shtmlhttp://www.prh.noaa.gov/hnl/cphc/http://www.aemet.es/es/serviciosclimaticos/vigilancia_climahttp://assignmentportals.com/2012/08/06/earth%E2%80%99s-revolution-around-sun/</p><p>Clim. of the month, summer 2012</p></li><li><p>Thank you!</p><p>Clim. of the month, summer 2012</p><p>Mean (top) and anomalous (bottom) sea surface temperature (SST). Anomalies are departures from the 1981-2010 base period monthly means (Smith and Reynolds 1998, J. Climate, 11, 3320-3323).Mean (top) and anomalous (bottom) depth of the 20C isotherm averaged between 5N-5S in the Pacific Ocean. Data are derived from the NCEP's global ocean data assimilation system which assimilates oceanic observations into an oceanic GCM (Behringer, D. W., and Y. Xue, 2004: Evaluation of the global ocean data assimilation system at NCEP: The Pacific Ocean. AMS 84th Annual Meeting, Seattle, Washington, 11-15). The contour interval is 10 m. Dashed contours in bottom panel indicate negative anomalies. Anomalies are departures from the 1981-2010 base period means. </p><p>Mean (top) and anomalous (bottom) outgoing longwave radiation (NOAA 18 AVHRR IR window channel measurements by NESDIS/ORA). Anomalies are departures from the 1981-2010 base period monthly means. Time-longitude section of anomalous sea level pressure (hPa) averaged between 5N-5S (CDAS/Reanaysis). Contour interval is 1 hPa. Dashed contours indicate negative anomalies. Anomalies are departures from the 1981-2010 base period pentad means. The data are smoothed temporally using a 3-point running average.</p><p>During an El Nio, sea level pressure tends to be lower in the eastern Pacific and higher in the western Pacific while the opposite tends to occur during a La Nia. This see-saw in atmospheric pressure between the eastern and western tropical Pacific is called the Southern Oscillation, often abbreviated as simply the SOMean (top) and anomalous (bottom) 850-hPa vector wind (CDAS/Reanaysis). Anomalies are departures from the 1981-2010 base period monthly means. The equatorial low-level easterly trade winds remained slightly enhanced over the west-central equatorial Pacific and slightly weaker than average across the east-central equatorial Pacific (Table T1, Fig. T20). This pattern does not reflect a clear atmospheric response to the positive SST anomalies. Enhanced convection was seen across Indonesia (Figs. T25, E3), which is further indication that the atmospheric circulation is not yet reflecting El Nio. Collectively, these oceanic and atmospheric anomalies reflect ENSO-neutral conditions. </p><p> a) Top: Movements of drifting buoys in the tropical Pacific Ocean. The linear segments of each trajectory represent a one week displacement. Trajectories of buoys which have lost their subsurface drogues are gray; those with drogues are blue. b) Middle: Monthly mean currents calculated from all buoys 1993-2010 (gray), and currents measured by the drogued buoys this month (black) smoothed by an optimal filter. c) Bottom: Anomalies from the climatological monthly mean currents for this month. The 500-hPa circulation during August featured a continued negative phase (-1.4) of the NAO, which mainly reflected persistent positive height anomalies over Greenland and negative height anomalies over the eastern North Atlantic.</p><p>Fourth consecutive month with a negative NAO pattern, and three straight months with an NAO index below -1.3.</p><p>This overall circulation was associated with a split-flow pattern across western Europe. For much of the region between France and the Caspian Sea, monthly surface temperature departures exceeded +2C and were above the 90th percentile of occurrences.For southern Europe, area-average precipitation totals have been in the lowest 15th percentile of occurrences for the last three months (Fig. E4).</p><p>Other regions: Dipole of precipitation in South America. Very high temperature anomalies in Eastern South America. These two features are linked to high Sea Level Pressure anomalies. anomalously strong subtropical high pressure system along its westward and southwestward flanks.</p><p>Other regions: Dipole of precipitation in South America. Very high temperature anomalies in Eastern South America. These two features are linked to high Sea Level Pressure anomalies. anomalously strong subtropical high pressure system along its westward and southwestward flanks.</p><p>These two features are linked to high Sea Level Pressure anomalies. anomalously strong subtropical high pressure system along its westward and southwestward flanks.</p><p>The west African monsoon typically peaks during July-September.</p><p>Areal estimates of monthly mean precipitation amounts (mm, red lines) and precipitation percentiles (%, bars) for the most recent 13 months obtained from a merge of raingauge observations and satellite-derived precipitation estimates (Janowiak and Xie 1999, J. Climate, 12, 3335-3342). The monthly precipitation climatology (mm, blue lines) is from the 1981-2010 base period monthly means. Monthly percentiles are not shown if the monthly mean is less than 5 mm.</p><p>The Atlantic Multi-Decadal Oscillation (AMO) is a fluctuation in de-trended sea surface temperatures in the North Atlantic Ocean. It was identified in 2000 and the AMO index was defined in 2001 as the 10-year running mean of the detrended Atlantic SST anomalies north of the equator. There is a significant negative correlation with US continental rainfall with less rain during a positive AMO index.The Antarctic ozone hole typically develops during August and reaches peak aerial extent in September and October. Daily time series showing the size of the ozone hole (denoted by total ozone </p></li></ul>