Connection between NAO, weather types and precipitation in León, Spain (1948–2008)

Fernández‐González, Sergio; Río, Sara del; Castro, Amaya; Penas, Ángel; Fernández‐Raga, María; Calvo, Ana; Fraile, Roberto

doi:10.1002/joc.2431

Cited by 51 publications

(46 citation statements)

References 63 publications

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“…The Mean Precipitation, Percentage Contribution, and the Precipitation Intensity were first introduced by Trigo and DaCamara (2000) and where also measured by Fernández-González et al (2012), who in the same paper presented the Precipitation Efficiency index for the key series of Leon (NW Spain). In particular the Area of Influence index, to the best of our knowledge, was never presented before in literature.…”

Section: Precipitation Indicesmentioning

confidence: 99%

Circulation weather types and spatial variability of daily precipitation in the Iberian Peninsula

2014

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The relationships between atmospheric circulation patterns and daily Iberian rainfall are here explored at high spatial resolution (0.2 • ) using the Jenkinson and Collison automated classification scheme with 26 Weather Types (WTs). The WTs were computed by means of the daily EMULATE Mean Sea Level Pressure dataset (EMSLP) while the high resolution precipitation database corresponds to the recent Iberia02 daily gridded precipitation dataset over the 1950-2003 period. Six monthly indexes relating the WTs and precipitation were analyzed: their Frequency, the Mean Precipitation, the Percentage Contribution, the Area of Influence, the Precipitation Intensity, and Efficiency. Except for the Frequency of the WTs, all other indexes were evaluated studying their spatial distribution over the Iberian Peninsula, focusing on a WT and a month at time. A small number of WTs (7) was found to capture a high percentage (∼70%) of monthly Iberian precipitation. The Westerly WT is the most influent one, followed by the Cyclonic, the Northwesterly and the Southwesterly WTs. Westerly flows, however, do not affect the Mediterranean fringe or the Cantabrian coast, which are dominated by the Easterly and Northerly WTs, respectively. Rainfall along the Mediterranean coastline and the Ebro basin depends on a variety of WTs, but their effects are confined to narrow areas and short temporal intervals, suggesting that local factors such as convective processes, orography and the proximity to a warm water body could play a major role in precipitation processes. We show that the use of daily gridded precipitation dataset holds the advantage of measuring the daily rainfall amount due to each WT directly instead to relying on the predicted values of the regression model as done in previous works.

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Section: Precipitation Indicesmentioning

confidence: 99%

Circulation weather types and spatial variability of daily precipitation in the Iberian Peninsula

2014

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“…This paper has presented the results obtained by analyzing the association between daily weather types and hospital admissions due to respiratory diseases in Castilla-La Mancha along seven years (2000)(2001)(2002)(2003)(2004)(2005)(2006). The objective weather type classification by Lamb (1972) has been used, which has also recently been applied to rainfall patterns in the Iberian Peninsula (Fernandez-Gonzalez et al, 2012). Other authors like Hanna et al (2011) have found that certain synoptic air masses (dry tropical, transitional and extreme moist tropical) in conjunction with ambient ozone air levels were associated with increased asthma hospitalizations.…”

Section: Discussionmentioning

confidence: 99%

“…The same classification has been used before to study rainfall patterns and air pollution in the Iberian Peninsula (Trigo and DaCamara, 2000;Calvo et al, 2012;Fernandez-Gonzalez et al, 2012).…”

Section: Daily Cwt Classificationmentioning

confidence: 99%

Influence of Meteorological Parameters and Air Pollutants onto the Morbidity due to Respiratory Diseases in Castilla-La Mancha, Spain

Monsalve

Tomás

Fraile

2013

Aerosol Air Qual. Res.

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This study considers the relationship between the risk of hospital admission due to respiratory diseases, the daily weather, and the air pollution conditions between 2000 and 2006. A synoptic climatological approach is used to investigate the links between weather types and all hospital admissions due to respiratory diseases in Castilla-La Mancha (CLM), Spain. The main circulation weather types (CWTs) were determined for winter and spring, the seasons with the highest percentage of hospital admissions, and the frequency distribution of these types was also analyzed. The study includes a summary of the main characteristics of the hospital admission series and their distribution over the study period of seven years, as well as the frequency distributions of the admissions classified by gender and age, for each season, month and day of the week. In addition, an admission index was used to compare CWTs and hospital admissions due to respiratory diseases. The results show distinctly different responses of daily respiratory disease admission rates (RD) to the eight CWTs identified in winter and in spring. In winter, three CWTs (southwesterly (SW), anticyclonic (A) and hybrid anticyclonic southwesterly (HASW)) present values 1.5 times above the average admission rates. In contrast, there are no significant differences in spring. Finally, the results of Principal Component Analysis applied to the daily series of meteorological parameters, atmospheric pollutants and morbidity data revealed that in winter the decrease in RD is related to increases in temperature and pressure. These results represent an important step in identifying reliable connections between weather-air pollutants and human health.

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“…Following Trigo and DaCamara (2000) in their study for Portugal, this study does not have a separate class for unclassified days, but has opted for disseminating the fairly few cases with possible unclassified situations (< 2%) among the retained classes. This classification has been used previously for the Iberian Peninsula with a number of different applications, such as the study of lightning (Tomas et al, 2004), splash erosion , aerosol size distribution in precipitation events Calvo et al, 2012) or in studies on precipitation (Fernandez-Gonzalez et al, 2012).…”

Section: Measurement Equipmentmentioning

confidence: 99%

Impact of Biomass Burning on Aerosol Size Distribution, Aerosol Optical Properties and Associated Radiative Forcing

Alonso‐Blanco

Calvo

Pont

et al. 2014

Aerosol Air Qual. Res.

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The influence of biomass burning on aerosol size distributions, particle number and radiative forcing has been studied at a rural site in Spain. It has been found that air contaminated by aerosols from biomass burning presents four times the total number of particles registered in non-contaminated air. In the case of the smallest fraction of the fine mode, between 0.1 and 0.2 µm, the increase soars to over seven times the total number of particles. An analysis of the evolution of the count mean diameter in the fine mode (CMD f ) in the 8 daily measurements has revealed a decrease of over 25% in this parameter in the modified measurements when compared with measurements that were not contaminated by aerosols from biomass burning. In contrast, when the aerosol transport time is long, the increases detected in CMD f range between 15% and 100% when compared with measurements of air by non-aged aerosol from biomass burning. Shortwave radiative forcings have been calculated for these high loads of fine aerosols with GAME (Global Atmospheric Model) software. For the August event, the daytime average of surface radiative forcing is -66 (±30) W/m 2 , and at the top of the atmosphere the forcing is -32 (±12) W/m 2 . Induced daytime average of atmospheric radiative forcing reaches 34 (±20) W/m 2 . The study demonstrates that wildfires affect not only the number of particles and the size distribution, causing a clear increase in the number of aerosols in the atmosphere, but they are also responsible for altering the local radiative balance.

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Connection between NAO, weather types and precipitation in León, Spain (1948–2008)

Cited by 51 publications

References 63 publications

Circulation weather types and spatial variability of daily precipitation in the Iberian Peninsula

Circulation weather types and spatial variability of daily precipitation in the Iberian Peninsula

Influence of Meteorological Parameters and Air Pollutants onto the Morbidity due to Respiratory Diseases in Castilla-La Mancha, Spain

Impact of Biomass Burning on Aerosol Size Distribution, Aerosol Optical Properties and Associated Radiative Forcing

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