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Cristina Prados-Roman

Cristina Prados-Roman
Instituto Nacional de Técnica Aeroespacial (INTA) · Department of Earth Observation and Atmosphere

PhD in Atmospheric Sciences

About

53
Publications
9,482
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Introduction
Cristina Prados-Roman currently works at the Atmospheric and Instrumentation Research Branch (Department of Earth Observation and Atmosphere) of the Spanish National Institute for Aerospace Technology (INTA). She does research in Atmospheric Chemistry, Remote Sensing and Absorption Spectroscopy.
Additional affiliations
February 2021 - present
Instituto Nacional de Técnica Aeroespacial (INTA)
Position
  • Investigador Científico de OPI
February 2016 - February 2021
Instituto Nacional de Técnica Aeroespacial (INTA)
Position
  • Científico Titular OPI
March 2013 - August 2014
Institute of Physical Chemistry Rocasolano (CSIC)
Position
  • PostDoc Position

Publications

Publications (53)
Article
Full-text available
This paper reports on ground-based validation of the atmospheric OClO data record produced within the framework of EUMETSAT's Satellite Application Facility on Atmospheric Chemistry Monitoring (AC SAF) using the Global Ozone Monitoring Experiment (GOME)-2A and GOME-2B instrument measurements, covering the 2007–2016 and 2013–2016 periods, respective...
Article
Full-text available
By studying the evolution of the color index (CI) during twilight at high latitudes, polar stratospheric clouds (PSCs) can be detected and characterized. In this work, this method has been applied to the measurements obtained by a visible ground-based spectrometer and PSCs have been studied over the Belgrano II Antarctic station for years 2018 and...
Article
Formaldehyde (CH2O) is a tracer of the photochemical activity of the atmosphere. Linked to air quality, CH2O is an ozone (O3) precursor and serves as a proxy for natural and anthropogenic reactive organic emissions. As a product of the photooxidation of methane (CH4) and other hydrocarbons (e.g., isoprene), CH2O represents an important source of ra...
Article
Full-text available
For decades, reactive halogen species (RHSs) have been the subject of detailed scientific research due to their influence on the oxidizing capacity of the atmosphere and on the climate. From the RHSs, those containing bromine are of particular interest in the polar troposphere as a result of their link to ozone-depletion events (ODEs) and to the pe...
Article
Full-text available
Naturally emitted from the oceans, iodine compounds efficiently destroy atmospheric ozone and reduce its positive radiative forcing effects in the troposphere. Emissions of inorganic iodine have been experimentally shown to depend on the deposition to the oceans of tropospheric ozone, whose concentrations have significantly increased since 1850 as...
Preprint
Full-text available
This paper reports on ground-based validation of the atmospheric OClO data record produced in the framework of EUMETSAT’s Satellite Application Facility on Atmospheric Chemistry Monitoring (AC SAF) using the GOME2-A and -B instruments over the 2007–2016 and 2013–2016 periods, respectively. OClO slant column densities are compared to correlative mea...
Article
Full-text available
This paper reports on consolidated ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by the TROPOspheric Monitoring Instrument (TROPOMI) on board of the ESA/EU Copernicus Sentinel-5 Precursor (S5P) satellite. Tropospheric, stratospheric, and total NO2 column data from S5P are compared to correlative...
Article
Full-text available
In September 2016, 36 spectrometers from 24 institutes measured a number of key atmospheric pollutants for a period of 17 d during the Second Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI-2) that took place at Cabauw, the Netherlands (51.97∘ N, 4.93∘ E). We report on the outcome of the formal semi-blind intercomp...
Article
Full-text available
For decades, reactive halogen species (RHS) have been subject of detailed scientific research due to their influence on the oxidizing capacity of the atmosphere and on the climate. From the RHS, those containing bromine are of particular interest in the polar troposphere as a result of their link to ozone depletion events (ODEs) and to the perturba...
Article
Full-text available
We present a simulation of the global present-day composition of the troposphere which includes the chemistry of halogens (Cl, Br, I). Building on previous work within the GEOS-Chem model we include emissions of inorganic iodine from the oceans, anthropogenic and biogenic sources of halogenated gases, gas phase chemistry, and a parameterised approa...
Article
Full-text available
We present a simulation of the global composition of the troposphere which includes the chemistry of halogens (Cl, Br, I). Building on previous work within the GEOS-Chem model we include emissions of inorganic iodine from the oceans, anthropogenic and biogenic sources of halogenated gases, gas phase chemistry, and a parameterised approach to hetero...
Article
Full-text available
We present a global simulation of tropospheric iodine chemistry within the GEOS-Chem chemical transport model. This includes organic and inorganic iodine sources, standard gas-phase iodine chemistry, and simplified higher iodine oxide (I2OX, X = 2, 3, 4) chemistry, photolysis, deposition, and parametrized heterogeneous reactions. In comparisons wit...
Article
Full-text available
We present a global simulation of tropospheric iodine chemistry within the GEOS-Chem chemical transport model. This includes organic and inorganic iodine sources, standard gas-phase iodine chemistry and simplified higher iodine oxide (I2OX, X = 2, 3, 4) chemistry, photolysis, deposition and parametrised heterogeneous reactions. In comparisons with...
Article
Full-text available
Emitted mainly by the oceans, iodine is a halogen compound important for atmospheric chemistry due to its high ozone depletion potential and effect on the oxidizing capacity of the atmosphere. Here we present a comprehensive data set of iodine oxide (IO) measurements in the open marine boundary layer (MBL) made during the Malaspina 2010 circumnavig...
Article
Full-text available
The absorption cross section of N2O5, sigma N2O5(lambda,T ), which is known from laboratory measurements with the uncertainty of a factor of 2 (Table 4-2 in (Jet Propulsion Laboratory) JPL-2011; the spread in laboratory data, however, points to an uncertainty in the range of 25 to 30 %, Sander et al., 2011), was investigated by balloon-borne observ...
Article
Full-text available
Naturally emitted from the oceans, iodine compounds efficiently destroy atmospheric ozone and reduce its positive radiative forcing effects in the troposphere. Emissions of inorganic iodine have been experimentally shown to depend on the deposition to the oceans of tropospheric ozone, whose concentrations have significantly increased since 1850 as...
Article
Full-text available
Emitted mainly by the oceans, iodine is a halogen compound important for atmospheric chemistry due to its high ozone depletion potential and effect on the oxidizing capacity of the atmosphere. Here we present a comprehensive dataset of iodine oxide (IO) measurements in the open marine boundary layer (MBL) made during the Malaspina 2010 circumnaviga...
Article
Full-text available
Glyoxal is an important intermediate species formed by the oxidation of common biogenic and anthropogenic volatile organic compounds such as isoprene, toluene and acetylene. Although glyoxal has been shown to play an important role in urban and forested environments, its role in the open ocean environment is still not well understood, with only a f...
Article
Full-text available
The absorption cross section of N2O5, σN2O5(λ, T), which is known from laboratory measurements with the uncertainty of a factor of 2 (Table 4-2 in (Jet Propulsion Laboratory) JPL-2011; the spread in laboratory data, however, points to an uncertainty in the range of 25 to 30%, Sander et al., 2011), was investigated by balloon-borne observations of t...
Article
Full-text available
Mercury is a contaminant of global concern. It is transported in the atmosphere primarily as gaseous elemental mercury, but its reactivity and deposition to the surface environment, through which it enters the aquatic food chain, is greatly enhanced following oxidation. Measurements and modelling studies of oxidised mercury in the polar to sub-trop...
Preprint
Full-text available
Mercury is a contaminant of global concern. It is transported in the atmosphere primarily as gaseous elemental mercury, but its reactivity and deposition to the surface environment, through which it enters the aquatic food chain, is greatly enhanced following oxidation. Measurements of oxidised mercury in the polar to sub-tropical marine boundary l...
Article
Full-text available
Observations of gas-phase iodine species were made during a field campaign in the eastern Pacific marine boundary layer (MBL). The Climate and Halogen Reactivity Tropical Experiment (CHARLEX) in the Galápagos Islands, running from September 2010 to present, is the first long-term ground-based study of trace gases in this region. Observations of gas...
Article
Full-text available
Ship-based Multi-Axis Differential Optical Absorption Spectroscopy measurements of iodine monoxide (IO) and atmospheric and seawater Gas Chromatography – Mass Spectrometer observations of methyl iodide (CH 3 I) were made in the Eastern Pa-cific marine boundary layer during April 2010 as a part of the HaloCarbon Air Sea 5 Transect-Pacific (HaloCAST-...
Article
Full-text available
Ship-based Multi-Axis Differential Optical Ab- sorption Spectroscopy measurements of iodine monoxide (IO) and atmospheric and seawater Gas Chromatography- Mass Spectrometer observations of methyl iodide (CH3I) were made in the Eastern Pacific marine boundary layer dur- ing April 2010 as a part of the HaloCarbon Air Sea Transect- Pacific (HaloCAST-P...
Presentation
Full-text available
Spatially and time-resolved observations of reactive iodine and bromine species were made during two field campaigns in the Eastern Pacific marine boundary layer (MBL) in order to improve our understanding of their sources and their impacts on ozone and aerosols. The first campaign, HaloCarbon Air Sea Transect-Pacific (HaloCAST-P), was a one-month...
Presentation
Mercury is transported in the atmosphere primarily as its less reactive elemental form, although its reactivity and deposition to the surface environment are greatly enhanced following oxidation. Measurements of oxidized mercury in the polar (1,2) to sub-tropical (3-6) troposphere and global mercury transport modelling (7,8) have suggested that pho...
Poster
Glyoxal ((CHO)2) and formaldehyde (HCHO) are important intermediates in the breakdown of many volatile organic compounds (VOCs). Glyoxal is also a possible source of secondary organic aerosol (SOA) through its condensation and coagulation. A recent study has shown the presence of high levels of glyoxal in the Pacific marine boundary layer (MBL), wh...
Presentation
Observations of reactive iodine and bromine species were made during two field campaigns in the Eastern Pacific marine boundary layer (MBL), aiming at a better understanding of their temporal and geographical distribution. The first campaign, HaloCarbon Air Sea Transect-Pacific (HaloCAST-P), was a one month ship-based study on a scientific cruise f...
Article
Full-text available
A novel limb scanning mini-DOAS spectrometer for the detection of UV/vis absorbing radicals (e.g., O3, BrO, IO, HONO) was deployed on the DLR-Falcon (Deutsches Zentrum für Luft- und Raumfahrt) aircraft and tested during the ASTAR 2007 campaign (Arctic Study of Tropospheric Aerosol, Clouds and Radiation) that took place at Svalbard (78° N) in spring...
Article
Full-text available
Theorem of optical mutuality Monte Carlo method 3D radiative transfer Jacobians a b s t r a c t A new Monte Carlo atmospheric radiative transfer model is presented which is designed to support the interpretation of UV/vis/near-IR spectroscopic measurements of scattered Sun light in the atmosphere. The integro differential equation describing the un...
Article
Full-text available
A novel limb scanning mini-DOAS spectrometer for the detection of UV/vis absorbing radicals (e.g., O3, BrO, IO, HONO) was deployed on the DLR-Falcon (Deutsches Zentrum für Luft- und Raumfahrt) aircraft and tested during the ASTAR 2007 campaign (Arctic Study of Tropospheric Aerosol, Clouds and Radiation) that took place at Svalbard (78° N) in spring...
Thesis
Reactive halogen species (i.e., RHS=X, XO, X2, XY, OXO, HOX, XONO2, XNO2, with X,Y being I, Br and Cl) are known to be key compounds for the oxidation capacity of the troposphere, affecting the lifetime of relevant species such as O3, HOx, NOx, hydrocarbons, dimethylsulfide and gaseous elementary mercury. Furthermore, recent observations link iodin...
Article
Full-text available
A novel limb scanning mini-DOAS spectrometer for the detection of UV/vis absorbing radicals (e.g., O3, BrO, IO, HONO) was deployed on the DLR-Falcon (Deutsches Zentrum für Luft- und Raumfahrt) aircraft and tested during the ASTAR 2007 campaign (Arctic Study of Tropospheric Aerosol, Clouds and Radiation) that took place at Svalbard (78° N) in spring...
Article
Full-text available
A new "Bayesian" minimization algorithm for the retrieval of the diurnal variation of UV/vis absorbing radicals (O3, NO2, BrO, OClO and HONO) from balloon-borne limb scattered skylight observations is discussed. The method evaluates spectroscopic measurements in combination with radiative transfer calculations to drive a mathematical inversion on a...
Presentation
A limb scanning mini-DOAS instrument was deployed on the DLR-Falcon aircraft during the ASTAR 2007 campaign ("Arctic Study of Tropospheric Aerosol, Clouds and Radiation", IPY 2007/8) that took place at Svalbard (78oN) in April 2007. The novel technique proved to be suitable for sensitive air-borne detection of some key radicals (e.g., BrO detection...
Article
Full-text available
A new "Bayesian" minimization algorithm for the retrieval of the diurnal variation of UV/vis absorbing radicals (O3, NO2, BrO, OClO and HONO) from balloon-borne limb scattered skylight observations is discussed. The method evaluates spectroscopic measurements in combination with radiative transfer calculations to drive a mathematical inversion on a...
Article
Full-text available
A new "Bayesian" minimization algorithm for the retrieval of the diurnal variation of UV/vis absorbing radicals (O<sub>3</sub>, NO<sub>2</sub>, BrO, OClO and HONO) from balloon-borne limb scattered skylight observations is discussed. The method evaluates spectroscopic measurements in combination with radiative transfer calculations to drive a mathe...
Poster
Within the ASTAR 2007 campaign ("Arctic Study of Tropospheric Aerosol, Clouds and Radiation", IPY 2007/8) that took place in Svalbard (78°N) in April 2007, spectroscopic limb scattered skylight measurements were performed from aboard the DLR (Deutsches Zentrum für Luft- und Raumfahrt) Falcon aircraft. By applying the Differential Optical Absorption...
Presentation
A recent study [Ravishankara et al., 2009] revealed the growing importance of N2O and the related partitioning of NOx/NOy for stratospheric ozone in the coming decades. Evidently, the related NOx/NOy photochemistry is most important in the tropical mid-stratosphere where most ozone is formed. We report on measurements of the diurnal variation of NO...
Article
Full-text available
We report upper limits of IO and OIO in the tropical upper troposphere and stratosphere inferred from solar occultation spectra recorded by the LPMA/DOAS (Limb Profile Monitor of the Atmosphere/Differential Optical Absorption Spectroscopy) payload during two stratospheric balloon flights from a station in Northern Brazil (5.1° S, 42.9° W). In the t...
Article
Full-text available
We report upper limits of IO and OIO in the tropical upper troposphere and stratosphere inferred from solar occultation spectra recorded by the LPMA/DOAS (Limb Profile Monitor of the Atmosphere/Differential Optical Absorption Spectroscopy) payload during two stratospheric balloon flights from a station in Northern Brazil (5.1° S, 42.9° W). In the t...
Poster
Within the ASTAR 2007 campaign ("Arctic Study of Tropospheric Aerosol, Clouds and Radiation") that took place in Svalbard (78˚ N) in April 2007, limb scattered skylight measurements were performed from aboard the DLR (Deutsches Zentrum für Luft- und Raumfahrt) Falcon aircraft. By applying the DOAS technique (Differential Optical Absorption Spectro...
Poster
Due to the ozone destroying capabilities of bromine bearing compounds, the stratospheric budget of inorganic bromine is of major interest for modelling ozone depletion and assessing the future evolution of the ozone layer. It has recently been shown that the contribution of very short-lived substances (VSLS) to the bromine budget enhances ozone dep...
Presentation
Due to the ozone destroying capabilities of bromine and iodine bearing compounds, the stratospheric budget of inorganic bromine and iodine is of major interest for modeling ozone depletion and assessing the future evolution of the ozone layer. In particular the contribution of very short lived substances (VSLS) to the bromine budget has recently be...

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