Encarna SERRANO

Encarna SERRANO
Complutense University of Madrid | UCM · Department of Physics of the Earth and Astrophysics

PhD in Physics

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45
Publications
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692
Citations

Publications

Publications (45)
Article
Full-text available
This study analyses quality controlled and homogenized near-surface wind speed series (SWS) at 87 meteorological stations distributed across Spain and Portugal for 1961–2019. Multidecadal variability analysis of both mean and gusts SWS confirms for the first time in the region the cessation of the stilling (decline of SWS) and a possible weak rever...
Article
Full-text available
The dynamical variability of the boreal stratospheric polar vortex has been usually analysed considering the extended winter as a whole or only focusing on December, January and February. Yet recent studies have found intra-seasonal differences in the boreal stratospheric dynamics. In this study, the intra-seasonal variability of anomalous wave act...
Article
Full-text available
Temperature anomalies in the lower stratosphere (namely, at 50-hPa) poleward of 30°N (hereafter, T50) are analysed from reanalysis daily products (i.e. ERA-40 and NCEP/NCAR) in order to detect those regions with statistically significant trends of T50 during the common 1957–2002 period. We also analyse radiosonde data in order to validate the reana...
Article
Full-text available
Upwelling across the tropical tropopause exhibits strong subseasonal variability superimposed on the well-known annual cycle, and these variations directly affect temperature and tracers in the tropical lower stratosphere. In this work, the dynamical forcing of tropical upwelling on subseasonal time scales is investigated using the European Centre...
Article
Full-text available
The zonal mean transport of ozone and carbon monoxide (CO) near the tropical tropopause is investigated using the Whole-Atmosphere Community Climate Model version 4 (WACCM4). The variability in temperature, ozone and CO in the model shows good agreement with satellite and balloon observations. Modeled temperature and tracers exhibit large and close...
Article
Full-text available
We aim to reconcile the recently published, apparently contrasting results regarding the relative importance of tropical upwelling versus horizontal transport for the seasonality of ozone above the tropical tropopause. Different analysis methods in the literature (Lagrangian versus Eulerian, and isentropic versus pressure vertical coordinates) yiel...
Article
Full-text available
The trajectories in the lower stratosphere of isopycnic balloons released from Antarctica by Vorcore and Concordiasi field campaigns during the southern springs of 2005 and 2010 showed events of latitudinal transport inside the stratospheric polar vortex, both away from and toward the poleward flank of the polar-night jet. The present paper applies...
Article
Full-text available
We aim to reconcile the recently published, apparently contrasting results regarding the relative importance of tropical upwelling versus horizontal transport for the seasonality of ozone above the tropical tropopause. Different analysis methods in the literature (Lagrangian versus Eulerian, and isentropic versus pressure vertical coordinates) yiel...
Article
Full-text available
The zonal mean transport of ozone and carbon monoxide (CO) near the tropical tropopause is investigated using the Whole-Atmosphere Community Climate Model version 4 (WACCM4). The variability in temperature, ozone and CO in the model shows good agreement with satellite and balloon observations. Modeled temperature and tracers exhibit large and close...
Conference Paper
The transport ozone and carbon monoxide (CO) near the tropical tropopause and in the tropical lower stratosphere is investigated using output from the Whole Atmosphere Community Climate Model (WACCM). We study temporal variability of the different zonal mean tracer transport terms on seasonal and sub-seasonal timescales. The results identify vertic...
Conference Paper
The trajectories in the lower stratosphere of isopycnic balloons released from Antarctica by international field campaigns during the southern springs of 2005 and 2010 showed events of latitudinal transport inside the stratospheric polar vortex, both away and towards the poleward flank of the polar night jet. The present work applies trajectory-bas...
Article
Full-text available
Temporal variability of the upwelling near the tropical tropopause on daily to annual timescales is investigated using three different estimates computed from the ERA-Interim reanalysis. These include upwelling archived by the reanalysis, plus estimates derived from thermodynamic and momentum balance calculations. Substantial variability in upwelli...
Article
Full-text available
Temporal variability of the upwelling near the tropical tropopause on daily to annual timescales is investigated using three different estimates computed from the ERA-Interim reanalysis. These include upwelling archived by the reanalysis, plus estimates derived from thermodynamic and momentum balance calculations. Substantial variability in upwelli...
Article
Full-text available
Transport in the lower stratosphere over Antarctica has been studied in the past by means of several approaches, such as contour dynamics or Lyapunov exponents. This paper examines the problem by means of a new Lagrangian descriptor, which is referred to as the function M. The focus is on the southern spring of 2005, which allows for a comparison w...
Conference Paper
Despite the well-known relevance of the tropical upwelling for stratospheric dynamics and chemistry, there are still basic uncertainties regarding its properties. A deeper understanding of the variability of this wave-induced mass flux across the tropical tropopause is crucial for clearly identifying its - still controversial - specific dynamical f...
Conference Paper
Quasi-horizontal transport in the lower stratosphere over Antarctica has been studied in the past by means of several approaches, such as contour dynamics or Lyapunov exponents. In this work the problem is explored by means of a new Lagrangian descriptor M, which has already been shown to be a powerful technique to studies of ocean flows. Specifica...
Conference Paper
In the last decades, several studies have identified how the sea surface temperature (SST) variability in the Tropical North Atlantic (TNA) area is linked with relevant phenomena, in particular the El Niño Southern Oscillation (ENSO). Some mechanisms have been proposed to explain this connection that involves atmospheric circulation anomalies in th...
Article
In January 2009 and 2010, two major stratospheric warmings (MSWs) took place in the boreal polar stratosphere. Both MSWs were preceded by nearly the strongest injection of tropospheric wave activity on record since 1958 and their central date was almost coincident. However, the typical external factors that influence the occurrence of MSWs (the Qua...
Conference Paper
The stratospheric circulation has been recently proposed to play an important role in transmitting the ENSO signal to the Euro-Atlantic region, which projects on annular-like patterns. In this context, the influence of the ENSO polarity on the winter circulation modes in the stratosphere-troposphere system over the Northern Hemisphere is studied. P...
Article
The relation between the ozone and the polar vortex in the stratosphere has an outstanding role in climate studios, and also a large repercussion in the improvement of the climate models. This importance is due to the combination of two reasons: the key role of the stratospheric ozone in the Earth climate due to its radiative properties, and that t...
Conference Paper
The Tropical Tropopause Layer (TTL) is currently a region of interest in climate studies, not only because it represents the interface between two different dynamical regimes, but also because it is the "gate" from the troposphere to the stratosphere for many atmospheric tracers. Although great progress has been recently made in understanding the T...
Article
In January 2009 a very intense major midwinter warming (MMW) took place in the boreal polar stratosphere. This MMW was unexpected since all the typical external factors that influence the occurrence of this kind of events (QBO phase, sunspot cycle or ENSO) were in favor of an undisturbed and strong polar vortex for the 2008/09 winter. In this work,...
Article
In recent decades, there has been a growing interest in the study of a possible active role of the stratosphere on the tropospheric climate. However, most studies have focused on this connection in wintertime. This paper deals with the possible relationship between variations in the timing of stratospheric final warmings (SFWs, observed in springti...
Article
Full-text available
An Atmospheric Boundary Layer campaign was developed in Spain along June 2008 at the CIBA (Research Centre for the Lower Atmosphere) site which is placed on a fairly homogeneous terrain in the centre of an extensive plateau (41°49' N, 4°56' W). Different instrumentation at several levels was available on a new 10m meteorological mast, including tem...
Article
The northern stratosphere in wintertime is characterized by a large interannual variability, particularly the occurrence of large stratospheric warmings. This phenomenon consists of a rapid increase of temperature in the polar stratosphere, which leads to an abrupt weakness of the intensity of the stratospheric polar vortex (cyclonic circulation in...
Article
The 1960–1996 patterns of monthly anomalous winter precipitation in Europe and North Africa (ENA) and their connection with the North Atlantic SST are studied. A lag Singular Value Decomposition analysis has been applied to monthly SST and precipitation data to define the most influential Atlantic oceanic areas on the winter ENA rainfall. The resul...
Article
Full-text available
Con objeto de ayudar a identificar los mecanismos físicos que ayuden a explicar la teleconexión entre las SSTs anómalas en el Atlántico subtropical y la variabilidad climática en el sector euro-atlántico, en este trabajo se analiza el comportamiento del viento horizontal anómalo (divergencia y viento zonal) en la atmósfera (desde 1000 a 10 hPa), qu...
Article
Full-text available
En el presente trabajo se analiza la influencia de la variabilidad atmosférica de baja frecuencia de la región del Atlántico Norte sobre las anomalías extremas de ozono total registradas en la estación ártica de Reikiavik en dos periodos estacionales (febrero-marzo-abril y agosto-septiembre-octubre) a lo largo de los años 1978-2002. Para ello, en p...
Article
The leading European winter precipitation anomalous pattern, connected to a NAO-like structure, has been related to a sea surface temperature structure which subtropical branch presents a significant persistence from the previous five months, having an important predictive value. Also, the Northern polar vortex presents a significant predictive ski...
Article
Recently, several studies have pointed out the seasonal predictability of the winter anomalous precipitation in Europe and North of Africa from the Subtropical North Atlantic summer Sea Surface Temperature (SST) anomalies with five months lag. This work analyses the anomalous SST cases in the Subtropical North Atlantic area associated with the extr...
Article
Recent studies give evidence of a potential predictability of the Northern Hemisphere (NH) mid-high latitude climate from the stratospheric circulation variability. These studies show that the quasi-biennial oscillation (QBO) in the equatorial stratosphere forces the Arctic Oscillation (AO), in such a way that zonal wind anomalies tend to propagate...
Article
Ten-day winter anomalous precipitation variability in the Iberian Peninsula (IP), related to the North Atlantic atmospheric general circulation, is analyzed using 24-h forecast ECMWF precipitation data over 1979-96. The three main modes that explain the 10-day winter precipitation variability are described using the empirical orthogonal function (E...
Article
In 1982 the Council of the city of Madrid undertook a series of measures aimed at reducing emissions of pollutants from domestic heating. By means of a statistical procedure designed to filter meteorological influences, trends in SO2 and particulate matter emissions are updated on the basis of monthly measured concentration values. It may be apprec...
Article
None of the numerous referenced experiments carried out since the 1940s for the study of the characteristic ozone-induced cracking that occurs on the surface of rubber materials subjected to strain, are appropriate for the estimation of moderate to low ozone concentrations in air over 24-h periods. Given this situation, a methodology based on the i...
Article
This paper deals with an attempt to obtain the annual trend in SO2 and particulate matter (PM) emission levels by means of a meteorological filter technique on analyzing the daily concentration levels in urban Madrid. As the region where Madrid is located is an area with large climatological “variability” from year to year, it has been necessary to...
Article
Full-text available
SUMMARY The influence of the North Atlantic atmospheric low frequency variability on the ozone extreme events in the Arctic station of Reykjavik (Iceland) is analyzed for February, March and April through 1978-2005. The EOF analysis was used to obtain the main geopotential modes over the Atlantic region in seven pressure levels (1000-10 hPa) from m...
Article
Full-text available
In this work it has been analysed the treatment given to Meteorology and Climatology in the Compulsory Secondary Education in Spain (ESO). Textbooks from different publishers have been used in order to have the closest idea to reality. The two cycles of Secondary Education (given in four years) have been revised through the next subjects: Natural S...

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