A. Vladimir Conde

A. Vladimir Conde

Chalmers tekniska högskola

H-index: 13

Europe-Sweden

About A. Vladimir Conde

A. Vladimir Conde, With an exceptional h-index of 13 and a recent h-index of 11 (since 2020), a distinguished researcher at Chalmers tekniska högskola, specializes in the field of Volcanoes, Industrial Emissions, Particles.

His recent articles reflect a diverse array of research interests and contributions to the field:

Results from exploratory project on NOx emissions from Ocean Going Vessels (OGV) using remote sniffer measurements

Validating CFD modelling of ship plume dispersion in an urban environment with pollutant concentration measurements

DOAS applied to shipping emission monitoring: compliance assessment and comparison to satellite measurements

Assessing Shipping Induced Emissions Impact on Air Quality with Various Techniques: Initial Results of the SCIPPER project

Modelling the evaporation and condensation of a ship exhaust emission aerosol using genetic optimization algorithm

2.21 Monitoring of ship emissions to enforce environmental regulations. The SCIPPER project.

A multi-purpose, multi-rotor drone system for long-range and high-altitude volcanic gas plume measurements

Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and …

A. Vladimir Conde Information

University

Chalmers tekniska högskola

Position

___

Citations(all)

596

Citations(since 2020)

392

Cited By

335

hIndex(all)

13

hIndex(since 2020)

11

i10Index(all)

14

i10Index(since 2020)

12

Email

University Profile Page

Chalmers tekniska högskola

A. Vladimir Conde Skills & Research Interests

Volcanoes

Industrial Emissions

Particles

Top articles of A. Vladimir Conde

Results from exploratory project on NOx emissions from Ocean Going Vessels (OGV) using remote sniffer measurements

Authors

Johan Mellqvist,Alexander Vladimir Conde Jacobo

Published Date

2024

The NOx emissions from ships are governed by the International Maritime Organization (IMO) through MARPOL's Annex VI. This annex is part of the International Convention for the Prevention of Pollution from Ships. It establishes emission limits in the form of Tiers, which vary depending on the construction date of the ships and their engines. Our study concentrates on ships classified under Tiers 0 to II, as these are currently the most common vessels navigating the waters.In the study, mass- and brake-specific emissions of NOx at different ship engine loads were determined from six years of remote sniffer measurements at the Great Belt Bridge in Denmark. This bridge is situated over the main shipping channel connecting the Baltic Sea and the North Sea, with over 25,000 ships passing through annually. The analyzed data predominantly corresponds to 721 container ships, 425 RoRo vessels, 127 Reefers (refrigerated cargo), and 892 crude oil tankers, which are highly relevant for the ship types traversing Southern California waters to call Port of Los Angeles and the Port of Long Beach. Additionally, since vessels tend to reduce speed when approaching the Great Belt Bridge, the operational profiles of these ships are also very relevant for specific areas like Southern California, where multiple federal and local programs exist to encourage ships to voluntarily adopt reduced speeds as a strategy to either avoid whale strikes or decrease total emissions by reducing fuel consumption for the same distance travelled.The finding reveal that Tier II container ships have the highest brake-specific NOx emissions among all ship types and tiers and that …

Validating CFD modelling of ship plume dispersion in an urban environment with pollutant concentration measurements

Authors

Christos Boikos,Panagiotis Siamidis,Sonia Oppo,Alexandre Armengaud,George Tsegas,Johan Mellqvist,Vladimir Conde,Leonidas Ntziachristos

Journal

Atmospheric Environment

Published Date

2024/2/15

Air pollution in urban areas constitutes a global environmental problem, with shipping being one major contributor to hazardous pollutants in harbour areas. This work concerns the application of a method using CFD modelling to study how ships affect the air quality of port areas at a microscale level. A steady RANS-CFD approach was applied to simulate the dispersion of shipping-emitted pollutants, and a spatial sensitivity analysis of the CFD modelling results was conducted. The port of Marseille was used as a case study, and the CFD predictions were compared with on-site observations from two monitoring stations for CO2, CO, NOx, SO2 and PM concentrations. Representative modelled and measured concentrations were considered at the location of the monitoring stations to facilitate one-by-one comparisons for all pollutants in three different test cases of departing vessels. The modelling predictions …

DOAS applied to shipping emission monitoring: compliance assessment and comparison to satellite measurements

Authors

Maxime Prignon,Vladimir Conde,J Smyth Timothy,Sundström Anu-Maija,Mellqvist Johan

Journal

EGU General Assembly Conference Abstracts

Published Date

2023/5

While shipping is generally the most energy-efficient freight transportation mode (in terms of gCO2 t-1 km-1), its intensive use (80% to 90% of global merchandise trade volume), coupled with high pollutant emission factors, leads to serious impact on the environment and the human health. The primary pollutants emitted by ships, nitrogen oxides (NOx= NO2+ NO), sulphur oxides (SOx, mainly SO2) and particulate matter (PM), degrade the air quality and are involved in the formation of secondary pollutants as tropospheric ozone (O3). As 70% of ship emissions occur within 400 km of coastlines, ship emissions have strong impact in harbour cities and coastal areas situated along high traffic shipping lanes. Compliance monitoring for fuel sulphur content (FSC) is usually done by the collection and the analysis of fuel samples by competent authorities from ships at berth. The complexity of the method results in very few …

Assessing Shipping Induced Emissions Impact on Air Quality with Various Techniques: Initial Results of the SCIPPER project

Authors

Sokratis Mamarikas,Volker Matthias,Matthias Karl,Lea Fink,Pauli Simonen,Jorma Keskinen,Miikka Dal Maso,Erik Fridell,Jana Moldanova,Åsa Hallquist,Johan Mellqvist,Vladimir Conde,Ruud Verbeek,Jan Duyzer,Daniëlle van Dinther,Hilkka Timonen,Jukka-Pekka Jalkanen,Anu-Maija Sundström,Elisa Majamäki,Antonios Stylogiannis,Vasilis Ntziachristos,Tim Smyth,Mingxi Yang,Anthony Deakin,Richard Proud,Johannes Oeffner,Jonathan Weisheit,Jörg Beecken,Andreas Weigelt,Simone Griesel,Hannes Schoppmann,Sonia Oppo,Alexandre Armengaud,Barbara D'Anna,Brice Temine-Roussel,Grazia-Maria Lanzafame,Bettina Knudsen,Jon Knudsen,Maria Kuosa,Matti Irjala,Leo Buckers,Jasper van Vliet,Leonidas Ntziachristos

Journal

Transportation Research Procedia

Published Date

2023/1/1

This paper presents the methods deployed by the Horizon 2O2O SCIPPER project to characterize emission performance of vessels, mainly under the perspective of checking compliance to new emissions regulations. Various on-board and remote measurement techniques have been demonstrated within five experimental campaigns conducted at Europe's main sea areas and ports. Almost a thousand of ship plumes has been measured and crossed checked with various instrumentation, revealing the emission profile of ships during actual operation Accuracy of each measurement technique was also tested. Emission measurements are further exploited to assess the impact of shipping on air quality of coastal areas, by identifying the transformations of pollutants performed in the atmosphere as plume evolves and quantifying onshore pollutants concentrations attributed to shipping activity.

Modelling the evaporation and condensation of a ship exhaust emission aerosol using genetic optimization algorithm

Authors

Oskari Kangasniemi,Pauli Simonen,Joni Kalliokoski,Asa M Hallquist,Jana Moldanova,Barbara D'Anna,Grazia Maria Lanzafame,Brice Temime-Roussel,Johan Mellqvist,Vladimir Conde,Jukka-Pekka Jalkanen,Alexandre Armengaud,M Karl,Leonidas Ntziachristos,Jorma Keskinen,Miikka Dal Maso

Published Date

2022/9/4

1Aerosol Physics Laboratory, Physics Unit, Tampere University, Tampere, 33720, Finland 2IVL Swedish Environmental Research Institute, Gothenburg, Sweden 3Aix Marseille Univ, CNRS, LCE, Marseille, France 4Department of Earth, Space and Environment, Chalmers University of Technology, Gothenburg, Sweden 5Atmospheric Composition Research, Finnish Meteorological Institute, Helsinki, 00101, Finland 6AtmoSud, Regional Network for Air Quality Monitoring of Provence-Alpes-Côte-d’Azur, Marseille, France 7Chemistry Transport Modelling, Helmholtz-Zentrum Geesthacht, Geesthacht, 21502, Germany 8Aristotle University of Thessaloniki, Thessaloniki, Greece

2.21 Monitoring of ship emissions to enforce environmental regulations. The SCIPPER project.

Authors

S Mamarikas,V Matthias,M Karl,L Fink,P Simonen,J Keskinen,M Dal Maso,E Fridell,H Winnes,J Moldanova,ÅM Hallquist,J Mellqvist,V Conde,R Verbeek,J Duyzer,D van Dinther,H Timonen,JP Jalkanen,AM Sundström,E Majamäki,A Stylogiannis,V Ntziachristos,T Smyth,Mi Yang,A Deakin10,R Proud10,J Oeffner11,VE Schneider11,J Beecken12,A Weigelt12,S Griesel12,H Schoppmann12,S Oppo13,A Armengaud13,B D'Anna14,B Temime-Roussel14,B Knudsen15,J Knudsen15,M Kuosa16,M Irjala16,L Buckers17,J van Vliet17,L Ntziachristos

Journal

Transport and Air Pollution (TAP) Conference

Published Date

2022

The present paper presents the methodological framework that has been adopted by the EU-funded project SCIPPER in order mainly to assess the potential of various shipping emission measurement techniques in monitoring the emission performance of vessels under real-world operation, as well as to provide evidence on the capacity of these techniques to be used by enforcement authorities to check the compliance of ships to emissions’ regulations and limits. Furthermore, SCIPPER intends to assess the impact of shipping emissions on air quality (AQ) under regulatory enforcement scenarios. The overall methodology is mainly concentrated around five real-world measurement campaigns at major seas and ports of Europe, where the different techniques are being tested under various operating conditions and compared regarding their accuracy, ease of implementation and cost. The techniques include on-board sensors (high-end systems and prototypes), remote techniques including sniffers and aerial means (drones). In addition, the possibility of monitoring emissions from satellites is examined. Real-world measurements also provide evidence on the AQ aspects that are being examined by the project, mainly related to the understanding of plume ageing, pollutants’ atmospheric transformation mechanisms and dispersion. The measurements are supplemented by other methodological tools as in-lab tests mainly for testing the developed methodology for plume ageing, desktop reviews for recognizing state-of-art technologies of on-board and remote sensors, as well as the development of emission factors for ships. Finally, AQ modelling …

A multi-purpose, multi-rotor drone system for long-range and high-altitude volcanic gas plume measurements

Authors

Bo Galle,Santiago Arellano,Nicole Bobrowski,Vladimir Conde,Tobias P Fischer,Gustav Gerdes,Alexandra Gutmann,Thorsten Hoffmann,Ima Itikarai,Tomas Krejci,Emma J Liu,Kila Mulina,Scott Nowicki,Tom Richardson,Julian Rüdiger,Kieran Wood,Jiazhi Xu

Journal

Atmospheric Measurement Techniques

Published Date

2021/6/9

A multi-rotor drone has been adapted for studies of volcanic gas plumes. This adaptation includes improved capacity for high-altitude and long-range, real-time SO2 concentration monitoring, long-range manual control, remotely activated bag sampling and plume speed measurement capability. The drone is capable of acting as a stable platform for various instrument configurations, including multi-component gas analysis system (MultiGAS) instruments for in situ measurements of SO2, H2S, and CO2 concentrations in the gas plume and portable differential optical absorption spectrometer (MobileDOAS) instruments for spectroscopic measurement of total SO2 emission rate, remotely controlled gas sampling in bags and sampling with gas denuders for posterior analysis on the ground of isotopic composition and halogens. The platform we present was field-tested during three campaigns in Papua New Guinea: in 2016 at Tavurvur, Bagana and Ulawun volcanoes, in 2018 at Tavurvur and Langila volcanoes and in 2019 at Tavurvur and Manam volcanoes, as well as in Mt. Etna in Italy in 2017. This paper describes the drone platform and the multiple payloads, the various measurement strategies and an algorithm to correct for different response times of MultiGAS sensors. Specifically, we emphasize the need for an adaptive flight path, together with live data transmission of a plume tracer (such as SO2 concentration) to the ground station, to ensure optimal plume interception when operating beyond the visual line of sight. We present results from a comprehensive plume characterization obtained during a field deployment at Manam volcano in May …

Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and …

Authors

Santiago Arellano,Bo Galle,Fredy Apaza,Geoffroy Avard,Charlotte Barrington,Nicole Bobrowski,Claudia Bucarey,Viviana Burbano,Mike Burton,Zoraida Chacón,Gustavo Chigna,Christian Joseph Clarito,Vladimir Conde,Fidel Costa,Maarten De Moor,Hugo Delgado-Granados,Andrea Di Muro,Deborah Fernandez,Gustavo Garzón,Hendra Gunawan,Nia Haerani,Thor H Hansteen,Silvana Hidalgo,Salvatore Inguaggiato,Mattias Johansson,Christoph Kern,Manne Kihlman,Philippe Kowalski,Pablo Masias,Francisco Montalvo,Joakim Möller,Ulrich Platt,Claudia Rivera,Armando Saballos,Giuseppe Salerno,Benoit Taisne,Freddy Vásconez,Gabriela Velásquez,Fabio Vita,Mathieu Yalire

Published Date

2020/11/3

Volcanic plumes are common and far-reaching manifestations of volcanic activity during and between eruptions. Observations of the rate of emission and composition of volcanic plumes are essential to recognize, and in some cases predict, the state of volcanic activity. Measurements of the size and location of the plumes are important to assess the impact of the emission from sporadic or localized events to persistent or widespread processes of climatic and environmental importance. These observations provide information on volatile budgets on Earth, chemical evolution of magmas and atmospheric circulation and dynamics. Space-based observations during the last decades have given us a global view of Earth’s volcanic emission, particularly of sulphur dioxide (SO2). Although none of the satellite missions were intended to be used for measurement of volcanic gas emission, specially adapted algorithms have produced time-averaged global emission budgets. These have confirmed that tropospheric plumes, produced from persistent degassing of weak sources, dominate the total emission of volcanic SO2. Although space-based observations have provided this global insight into some aspects of Earth's volcanism, it still has important limitations. The magnitude and short-term variability of lower-atmosphere emissions, historically less accessible from space, remain largely uncertain. Operational monitoring of volcanic plumes, at scales relevant for adequate surveillance, has been facilitated through the use of ground-based scanning-differential optical absorption spectrometers (ScanDOAS) since the beginning of this century, largely due to the …

Best practice report on compliance monitoring of ships with respect to current and future IMO regulation

Authors

Johan Mellqvist,Alexander Vladimir Conde Jacobo

Published Date

2021

Since 2015, new rules from the International Maritime Organization (IMO) and legislation from EU and the US allows ships to run with maximum fuel sulfur content (FSC) of 0.1 % m/m on northern European and US waters, respectively, or use appropriate abatement technique. In addition, since2020, there is a global cap of 0.5 % for the FSC. From 2021, northern Europe is a NOx emission control area, requiring at least 80 % emission reduction (Tier III) for all ships built from this year and onward, compared to ships built between 2000 and 2010 (Tier I). There is also a discussion withinIMO how to control particle emission of black carbon (BC). This report focuses on best practice in remote compliance monitoring of FSC without stepping on board of the ship. Similar measurements for NOx are also shown, with a discussion whether these can be used for compliance monitoring.Some examples of remote measurements of BC are provided. Remote measurement methods for compliance monitoring of FSC in ships have been developed during the last 10 years within national and European projects (EnviSum and Compmon) and furthermore implemented in nationalmonitoring in Belgium, Denmark, Germany the Netherlands and Sweden. The measurement methods are generally based on sniffer systems measuring the exhaust gas concentrations of SO2, NOx and particulate matter (BC), respectively, against CO2. There are systems with varying sensitivity that areoperated at different distances from the ships (50 m to 2 km) and from different platforms, i.e. fixed, shipborne and airborne (manned and unmanned). There are also optical systems measuring …

Surveillance of Sulfur Fuel Content in Ships at the Great Belt Bridge 2020

Authors

Johan Mellqvist,Alexander Vladimir Conde Jacobo

Published Date

2021

Results are reported from stack gas emission measurements of individual ships at the Great Belt Bridge in Denmark. From the data the fuel sulfur content (FSC) used by the ships has been estimated. The project has been carried out on behalf of the Danish Environmental Pro-tection Agency and this report covers the period December 2019 to November 9, 2020. The overall aim of the project was to carry out operational surveillance of ships with respect to the EU sulfur directive that was entered into force in 2015 and which is implemented in the Danish legislation. It requires the usage of low sulfur marine fuel in SECAs (0.10 %) or using abate-ment technique (e.g. scrubber), The main purpose of the surveillance was to guide further port state control of ships at the destination harbors of the ships, both in Denmark and other ports, and to gather general statistics about compliance rates.This report describes the technical systems and their performance and discusses the general compliance levels with respect to the EU sulfur directive and Danish legislation. The surveil-lance measurements were conducted by automatic gas sniffer measurements at the Great Belt Bridge, reporting in real time to a web database. The measurement systems have been developed by Chalmers University of Technology through Swedish national funding and EU projects. The measurement system at the Great Belt Bridge has been in operation since 2015.In the period December 2019 to November 9, 2020, 3910 valid sniffer measurements of indi-vidual ships were carried out at the Great Belt Bridge with medium and good quality. The pre-cision of the fixed sniffer is …

See List of Professors in A. Vladimir Conde University(Chalmers tekniska högskola)

A. Vladimir Conde FAQs

What is A. Vladimir Conde's h-index at Chalmers tekniska högskola?

The h-index of A. Vladimir Conde has been 11 since 2020 and 13 in total.

What are A. Vladimir Conde's top articles?

The articles with the titles of

Results from exploratory project on NOx emissions from Ocean Going Vessels (OGV) using remote sniffer measurements

Validating CFD modelling of ship plume dispersion in an urban environment with pollutant concentration measurements

DOAS applied to shipping emission monitoring: compliance assessment and comparison to satellite measurements

Assessing Shipping Induced Emissions Impact on Air Quality with Various Techniques: Initial Results of the SCIPPER project

Modelling the evaporation and condensation of a ship exhaust emission aerosol using genetic optimization algorithm

2.21 Monitoring of ship emissions to enforce environmental regulations. The SCIPPER project.

A multi-purpose, multi-rotor drone system for long-range and high-altitude volcanic gas plume measurements

Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and …

...

are the top articles of A. Vladimir Conde at Chalmers tekniska högskola.

What are A. Vladimir Conde's research interests?

The research interests of A. Vladimir Conde are: Volcanoes, Industrial Emissions, Particles

What is A. Vladimir Conde's total number of citations?

A. Vladimir Conde has 596 citations in total.

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