University of Extremadura, BADAJOZ (Spain)
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Please feel free to contact me by e.mail: mananton(at)unex.es
This thesis focuses on the analysis of the optical and microphysical properties of the atmospheric aerosol during African dust outbreaks recorded at Granada. These properties were classified according to potential source sector and also applying a cluster analysis. Additionally, the influence of the studied desert dust event on shortwave radiative forcing at the surface and the top of the atmosphere were also evaluated using a radiative transfer code fed with experimental sun-photometer data.
Major advances presented in this work are related to the implementation and application of a new methodology for deriving atmospheric columnar optical and microphysical properties using sky radiance in principal plane configuration, and considering that the particles are not spherical
This Ph.D. dissertation can be downloaded at:
Congratulations Dr. Valenzuela !!!.
More information at:
You can read the research note and see the striking photo at:
ITRAS invites applications for 11 Early Stage Researcher (ESR, 3 year PhD) positions in 7 European countries. For this purpose, the PhD projects will focus on high-end ground-based remote-sensing instrumentation, synergistic observations and/or mathematical methods. For more information please click here.
More information at:
You can see the video “Increasing ultraviolet radiation levels” at:
The project aims to significantly enhance the reliability of spectral solar UV radiation measured at the Earth surface. New methods of observation (techniques and instruments) are developed to provide traceable for solar UV irradiance measurements with an uncertainty of less than 2%.
The project will include three workshops, and a large field intercomparison campaign near the end of the project which will be opened for external collaborators.
More information on the project activities can be found in the project web pages.
- International Radiation Symposium, 6-10 August, Berlin, Germany
- Quadrennial Ozone Symposium, 27-31 August, Toronto, Canada
- European Aerosol Conference, 2-7 September, Granada, Spain
- Atmospheric Science Conference, 18-22 June, Bruges, Belgium
- EUMETSAT Meteorological Satellite Conference, 3-7 September, Sopot, Poland
- EGU General Assembly, 22-27 April, Vienna, Austria
- SPIE Remote Sensing, 24-27 September, Edinburgh, United Kingdom.
- IEEE Geoscience and Remote Sensing Symposium, 22-27 July, Munich, Germany
- International Conference on Clouds and Precipitation, July 30 - August 03, Leipzyg, Germany
- European Meeting on Atmospheric Studies by Optical Methods, 20-24 August, Sopot, Poland
- International Conference on Meteorology, Climatology and Atmospheric Physics, May 30 - 1 June, Athens, Grecee
The reconstructed hourly UVER irradiance values are in good agreement with the measurements in the seven locations, showing low RMSE values in summer (from 5% to 9%). A reconstructed 10 min UVER data set from 1991 to 2010 has been derived from the proposed method. Statistically significant UVER trends appear in summer and autumn when UVER levels increased 3.5% and 4.1% per decade, respectively.
The simulations showed that mid-latitude oceanic impacts of 1 km asteroids could produce a significant, global perturbation of upper atmospheric chemistry, including multi-year global ozone depletion comparable to ozone hole records registered in the mid-1990s. In addition, this ozone depletion would produce ultraviolet index (UVI) levels higher than 20 at the Earth’s surface during about two years in both the northern and southern hemispheres.
- providing long-term observational data relevant to climate and air quality research produced with standardized or comparable procedures;
- supporting transnational access to large infrastructures strengthening collaboration in and outside the EU and access to high quality information and services to the user communities;
- developing new integration tools to fully exploit the use of atmospheric techniques at ground-based stations, in particular for the calibration/validation/integration of satellite sensors and for the improvement of global and regional-scale climate and air quality models.
The Royal Netherlands Meteorological Institute (KNMI) has developed two retrieval algorithms to derive the total ozone data from these two European satellite instruments. These two retrieval algorithms are the Total Ozone retrieval scheme for the GOME instrument based on the OMI DOAS algorithm (TOGOMI), and the corresponding application to the SCIAMACHY instrument (TOSOMI).
A new version (2.0) of these two retrieval algorithms has been prepared by KNMI staff, and the new total ozone data are distributed via internet from the Tropospheric Emission Monitoring Internet Service (TEMIS)
Regarding the interactions between ozone and climate change, the paper analyses both the effects of the implementation of the Montreal Protocol on climate change, and the influence of the increasing greenhouse gases on ozone recovery.
The campaign is scheduled in three main phases:
* Initial calibration to assess the current calibration of the instruments.
* Servicing, adjustments and maintenance works characterization test of the instruments.
* Final calibration. In this phase the ‘UV’ calibrations against the QASUME
Specific measurements for Brewer/Dobson comparison
Detailed information is available at the RBCC-E web page.
The task of the ESA Ozone-cci project is to improve on the scientific and operational exploitation of current European and Third Party Mission ozone monitoring sensors, by creating merged multi-sensors Essential Climate Variable (ECV) ozone time series that match the requirements formulated by GCOS, and allow reducing current uncertainties on the determination of ozone trends.
The Ozone_cci project team consists of 13 European partner institutions which are experts in the area of satellite retrieval algorithms, geophysical validation, system engineering and chemistry-climate modelling.
The summary states that over the past decade, global ozone is no longer decreasing but is not yet increasing. Using numerical models of the Earth’s atmosphere, the report predicts that the stratospheric ozone layer will fully recover within the next 50 years.
Regarding the influence of ozone changes on ultraviolet radiation, the executive summary says that large UV levels in Antarctica continue to be seen when the springtime ozone hole is large. For instance, the Antarctic spring erythemal irradiance is approximately twice that measured in the Arctic for the same season. In addition, it is reaffirmed that at mid-latitudes, surface UV radiation has been about constant over the last decade, consistent with total ozone column observations over this period.
This UV forecast data is harnessed from NOAA UV Index forecasting which uses the TUV radiative transfer code for deriving the erythemally weighted downwelling UV fluxes. This NOAA UV Index is computed using forecasted ozone data, and cloud amounts. In addition, climatological aerosol loading, variable snow and constant bare earth albedo, and elevation are used in the model.
The report has been written by leader authors, but it is a result of the collective efforts of the members of the four Working Groups, coming from 23 countries. CONGRATULATIONS!!!!!
Access selected content from the web focus free online:
the 25 anniversary of the discovery of the Antarctic ozone hole
The atlas is free for non-comercial use, and it can be downloaded in the following web:
- EGU (European Geosciences Union, General Assembly 2010), 2-7 May, Vienna, Austria.
- 37th Annual European Meeting on Atmospheric Studies by Optical Methods , 23-27 August, Valladolid, Spain.
- IAC (International Aerosol Conference) , 29 August- 3 September, Helsinki, Finland.
- SPIE Remote Sensing, 20-23 September, Toulouse, France.
- EUMETSAT Meteorological Satellite Conference, 20-24 September, Cordoba, Spain.
More information in:
Detailed information about this product can be found at:
OMO3PR README File
Full OMO3PR data, as well as subsets of these data over many ground stations and along Aura validation aircraft flights paths are available through the Aura Validation Data Center (AVDC) website
The link to this page is the following: http://calvalportal.ceos.org/cvp/web/guest/cal/val-wiki
The specific objetives of this project are:
1. Development of a satellite data processing system to generate a standard reference multi-year global aerosol product (GAP) over land and water.
2. Production of the GAP covering 1995–2007.
3. Validation of the GAP using independent ground-based measurements.
4. Intercomparison of the GAP with other satellite-based aerosol data sets.
Detailed information in: http://www.globaerosol.info/
View/Download this Publication (PDF, 3 MB)
• Extend and reinforce the actions of EARLINET (European Aerosol Research Lidar Network to Establish an Aerosol Climatology).
• The formation of a nucleus for the development of the Spanish and Portuguese lidar community.
• Promote the participation of new groups for improving the spatial coverage of aerosol vertical measurements on the Iberian Peninsula territory.
If altitude is higher than 1 km the following correction should be applied: AOT=AOT / (altitude[km])^1.65
Angstrom coefficient: 1
Single scattering albedo: 0.94
Asymmetry factor: 0.75
This climatology is free for non-comercial use.
The full text can be downloaded in the following link:
EORCU currently coordinates the Stratospheric-Climate Links with Emphasis on the Upper Troposphere and Lower Stratosphere (SCOUT-O3) Project.
COST Action 726 - Report of the “El Arenosillo”/INTA-COST Calibration and Intercomparison Campaign of UVER Broadband Radiometers
View/Download this Publication (pdf, 4 MB)
- The FOURTH INTERCOMPARISON CAMPAIGN OF THE REGIONAL BREWER CALIBRATION CENTER-EUROPE (RBCC-E) in a joint intercomparison campaign with the Regional Dobson Calibration Center-Europe (RDCC-E) will be held at the El Arenosillo Atmospheric Sounding Station - INTA (Huelva) during the period September 7th-17th, 2009
- The ATMOSPHERIC SCIENCE CONFERENCE, organised by the European Space Agency in Barcelona, 7-11 September 2009.
The NEUBrew website is:
Krzyscin, J.W., Statistical Reconstruction of Daily Total Ozone over Europe 1950 to 2004, Journal of Geophysical Research, Vol.113, D07112, doi: 10.1029/2007JD008881, 2008
The most up-to-date information can be found from the web page:
The meeting will be hosted by the Aosta Valley Regional Environmental Protection Agency (ARPA), Aosta (Italy), 20-26 September 2009.
More information in the meeting web site.
The OMI satellite instrument is a contribution of the Netherlands's Agency for Aerospace Programs (NIVR) in collaboration with the Finnish Meteorological Institute (FMI), and it is onboard NASA EOS/Aura platform launched in July 2004. This remote sensing UV spectrometer continues currently with the measurements recorded by the NASA Total Ozone Mapping Spectrometer (TOMS) instrument which was operative on board of two satellites: Nimbus-7 (1978-1993) and Earth Probe (EP) (1996-2005).
The total ozone column over many locations (in Spain: Badajoz, El Arenosillo, Madrid and Valencia ) can be obtained in the following ftp site:
More information in the web of COST Action 726
More information in the following link:
- The greenhouse gases produces near-surface global warming. This fact is expected to cool the stratosphere, and in turn, it is expected to produce a relative increase in stratospheric ozone depletion.
- Conversely, ozone is a radiative forcing of the climate system. There are two opposing effects. On the one hand, ozone increases in the troposphere from pollution associated with human activities leads to a warming of Earth’s surface. In contrast, stratospheric ozone depletion represents a small negative forcing, which leads to cooling of Earth’s surface.
There are several interesting links which detail this subject:
EUFAR is organizing its 2nd Summer School on Airborne Cloud and AerosolScience (ACAS) open to PhD students and Post Docs. This school will take place in Utrecht, The Netherlands from April 14th to April 25th 2008. The aim of the school is to train students in airborne research focused on aerosols and clouds.
The project "Ozone layer and UV radiation in a changing climate evaluated during the IPY (ORACLE-O3)" deals with experimental and modelling research on the ozone layer, UV radiation and the effects of personal UV exposure during the International Polar Year 2007-2008 (IPY). This project is divided into 7 main activities:
- Ozone loss (detection and impact on UV radiation)
- PSC and cirrus
- Atmospheric chemistry
- UV radiation
- Ozone and climate change and feedback
- Data management
- Education, outreach and communication
ORACLE-O3 project has contributions from 67 research institutions in 22 countries. Spanish constribution is summarized in this presentation:
Sandra's web-page contains two very interesting lists about aerosol science:
The main scientific objectives of the VAS are:
- Definition of a large scale validation area for low-spatial resolution missions.
- Definition and characterisation of a large scale reference pixel.
- Study of scaling issues. Time Interpolation and Spatial Averaging.
VAS takes part in validation and calibration activities of satellite sensors corresponding to several missions such as EarthCARE (Earth Clouds, Aerosols and Radiation Explorer) and CERES (Clouds and the Earth’s Radiant Energy System).More information in its web:
- provide real-time information from a core-operational and quality controlled dust monitoring and forecasting system.
- maintain a web portal with both research and near-real information and links to available dust forecasting and monitoring systems within the region.
- implement a web-oriented modelling and observational historical data base available for case-study and climatological analysis.
More information in the following link:
After many hard working days in the last couple of weeks, "Gabriel de Castilla" Antarctic Base is completely operative. At all, 14 Spaniards and 1 Mexican will stay during three months in this far place. My colleages Antonio Serrano (row of down, second by the left) and Maria Luisa Cancillo (row of above, second by the right) have already started their research works about the radiative budget in the permafrost (frozen ground) . Good Luck!!!!
The Global Ozone Monitoring Experiment-2 (GOME-2) is one of the new-generation European instruments carried on MetOp-A (launched in October 2006). It continues the long-term monitoring of atmospheric trace gases started by GOME on ERS-2 and SCIAMACHY on Envisat.
- Ozone depletion in a historical perspective
- Observations – total ozone, vertical distribution, analysis and evaluation
- UV changes
- Tropospheric ozone – trends, precursors, emissions
- Climate ozone interaction
- Ozone recovery
Carlos focuses his research on the study of atmospheric aerosols with optical methods. He did his Ph.D. thesis at Atmospheric Optics Group from University of Valladolid (Spain).
Information about topics, deadlines, etc, in the following link:
AIRE research group (University of Extremadura) is participating since 2004 with a Cimel photometer located at Cáceres.
More information about RIMA Network in its web (in Spanish):
This research stay is a continuation of a O3-SAF VS Activity carried out the past year which was summarized in this report: