GPS roll-over

GPS roll-over the 3rd of November 2019 on the CE318-T

Important for existing CE318-T customers:

The GPS week counter will reset again the 3rd of November 2019.

Location data reports will remain correct while the date and week number will be affected. 

The CIMEL CE318-T photometer will be impacted by the GPS week counter reset.

It is necessary to use the last version of the firmware for the photometer to remain operational.

Please see the related process bellow to check and update the right firmware version before the due date.

You will need a computer and to be on site to connect on the control unit and update the firmware.

If you don’t have the opportunity before the 3rd of November 2019, you can work around it by disconnecting the GPS antenna until you update the firmware.

If you have any question or concern regarding the GPS roll-over issue, feel free to contact us.

Download the procedure here.

N.B.: If you are registered in AERONET, please contact the NASA AERONET team.

Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements

CE318-T Izaña

Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements

August 9, 2019

A comprehensive comparison of more than 70 000 synchronous 1 min aerosol optical depth (AOD) data from three Global Atmosphere Watch precision-filter radiometers (GAW-PFR), traceable to the World AOD reference, and 15 Aerosol Robotic Network Cimel radiometers (AERONET-Cimel), calibrated individually with the Langley plot technique, was performed for four common or “near” wavelengths, 380, 440, 500 and 870 nm, in the period 2005–2015.

The goal of this study is to assess whether, despite the marked technical differences between both networks (AERONET, GAW-PFR) and the number of instruments used, their long-term AOD data are comparable and consistent.

The percentage of data meeting the World Meteorological Organization (WMO) traceability requirements (95 % of the AOD differences of an instrument compared to the WMO standards lie within specific limits) is >92 % at 380 nm, >95 % at 440 nm and 500 nm, and 98 % at 870 nm, with the results being quite similar for both AERONET version 2 (V2) and version 3 (V3). For the data outside these limits, the contribution of calibration and differences in the calculation of the optical depth contribution due to Rayleigh scattering and O3 and NO2 absorption have a negligible impact. For AOD >0.1, a small but non-negligible percentage (∼1.9 %) of the AOD data outside the WMO limits at 380 nm can be partly assigned to the impact of dust aerosol forward scattering on the AOD calculation due to the different field of view of the instruments. Due to this effect the GAW-PFR provides AOD values, which are ∼3 % lower at 380 nm and 2 % lower at 500 nm compared with AERONET-Cimel. The comparison of the Ångström exponent (AE) shows that under non-pristine conditions (AOD >0.03 and AE <1) the AE differences remain <0.1. This long-term comparison shows an excellent traceability of AERONET-Cimel AOD with the World AOD reference at 440, 500 and 870 nm channels and a fairly good agreement at 380 nm, although AOD should be improved in the UV range.

Citation: Cuevas, E., Romero-Campos, P. M., Kouremeti, N., Kazadzis, S., Räisänen, P., García, R. D., Barreto, A., Guirado-Fuentes, C., Ramos, R., Toledano, C., Almansa, F., and Gröbner, J.: Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements, Atmos. Meas. Tech., 12, 4309–4337, https://doi.org/10.5194/amt-12-4309-2019, 2019.

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Ocean Obs 19

OceanObs'19

OceanObs’19 – An ocean of opportunity

September 16-20, 2019 | Honolulu, Hawaii, USA

Part of the decadal conference series, OceanObs’19 will bring together the ocean observing community ranging from scientists to end users. The conference aims to “improve response to scientific and societal needs of a fit-for-purpose integrated ocean observing system,” to help better understand the environment of the Earth, monitor climate, and inform adaptation strategies as well as the sustainable use of ocean resources.

OceanObs’19 will address the following themes: observing system governance; data and information systems; observing technologies and networks; pollution and human health; hazards and maritime safety; blue economy; discovery; ecosystem health and biodiversity; climate variability and change; and water, food and energy security.

The conference is organized with support from: the US National Aeronautics and Space Administration (NASA); the US National Oceanic and Atmospheric Administration (NOAA); the European Commission; the Global Climate Observing System – an initiative co-sponsored by the World Meteorological Organization (WMO), the Intergovernmental Oceanographic Commission of the UN Educational, Scientific and Cultural Organization (IOC-UNESCO), the UN Environment Programme (UNEP) and the International Science Council (ISC); and other partners.

We are very proud to be a part of this event and look forward to some lively and interesting discussion on a vital subject.

See more on: https://www.oceanobs19.net/

IAOOS

IAOOS – Ice Atmosphere Arctic Ocean Observing System

FEBRUARY 2011 – DECEMBER 2019

The IAOOS Project’s objective is to develop and maintain an automated observation network of ice-tethered platforms across the Arctic Ocean which will simultaneously and independently transmit via satellite, in near real time, the state of the ocean, sea ice and the lower atmosphere.

The project uses a CIMEL microlidar to monitor the atmosphere (T, conso, f optical window).

IAOOS project

The IAOOS equipment is based on 15 autonomous platforms working at any time in the Arctic Ocean, for a period of 7 years. Every platform, made up of 3 elements ocean / atmosphere / sea ice, drifts with the sea ice, the surface winds and the oceanic currents. They are designed to stay at the sea-ice surface and float on the surface of the ocean, with an autonomy of 2 years.

The IAOOS project plans the deployment of 6 platforms per year, following the plan of deployment of the first 15 platforms. Two periods of deployments are planned every year: in spring and in autumn.

Project
Observing, understanding and quantifying climate changes in the Arctic. IAOOS is specifically concerned with the potential for a significantly reduced sea ice cover, and the impacts this might have on the environment and on human activities, both regionally and globally.

Objectives

  • Deploy and maintain an integrated observing system providing simultaneous observations of the ocean, ice and lower atmosphere in real time in the Arctic
  • Complementary to satellite observations
  • Better understanding of interactions
  • Feed operational models
  • Improve predicting capabilities

Equipment on the IAOOS Platforms

  • CTD vertical profilers from 0 to 1000 m depth (conductivity, temperature, depth)
  • Ice Mass Balance (IMB)
  • Temperature and pressure sensors
  • CIMEL microlidars: T, conso, f optical window for atmosphere monitoring
  • Optical depth sensors (ODS)

Partners

IAOOS platform

References

  • Vincent Mariage, Jacques Pelon, Frédéric Blouzon, Stéphane Victori. IAOOS microlidar development and firsts results obtained during 2014 and 2015 arctic drifts . EPJ Web of Conferences, EDP Sciences, 2016, The 27th International Laser Radar Conference (IRLC 27), 119, 02005 (4 p.)(https://hal-insu.archives-ouvertes.fr/insu-01175931)
  • Vincent Mariage, Jacques Pelon, Frédéric Blouzon, Stéphane Victori, Nicolas Geyskens, Nadir Amarouche, Christine Drezen, Antoine Guillot, Michel Calzas, Magali Garracio, Nicolas Wegmuller, Nathalie Sennéchael, and Christine Provost, “IAOOS microlidar-on-buoy development and first atmospheric observations obtained during 2014 and 2015 arctic drifts,” Opt. Express 25, A73-A84 (2017) (https://doi.org/10.1364/OE.25.000A73)
  • Vincent Mariage. Développement et mise en oeuvre de LiDAR embarqués sur bouées dérivantes pour l’étude des propriétés des aérosols et des nuages en Arctique et des forçages radiatifs induits. Physique Atmosphérique et Océanique [physics.ao-ph]. Université Pierre et Marie Curie – Paris VI, 2015. Français. NNT : 2015PA066580

Sunbelt Spectra comparison with Standard ASTM G173: the Chilean case

Sunbelt Spectra comparison with Standard ASTM G173: the Chilean case

December, 2017

Two spectra of solar direct normal irradiance (including circumsolar) are estimated based on spatio-temporal averages of the relevant atmospheric parameters extracted from two different databases: MODIS satellite sensor retrievals and AERONET sun photometer network. The satellite database is used to calculate an average spectrum for the area of the Atacama Desert. The AERONET database is used for two purposes: (i) to apply bias-removal linear methods to correct the MODIS parameters over Atacama, and (ii) to calculate an average local spectrum for the Paranal station. The SMARTS radiative transfer model is used to obtain the three spectra developed in this study. Both the Atacama and Paranal spectra are compared against each other and also to the world reference, ASTM G173. In one of the cases, significant differences are found for short wavelengths. In order to quantify the relative importance of these spectral differences, the propagation of errors due to the use of each spectrum is evaluated for CSP applications over the Atacama Desert, considering twelve different scenarios involving the reflectance, transmittance or absorptance of various materials.

Citation: Marzo, Aitor & Polo, Jesus & Wilbert, Stefan & Gueymard, Chris & Jessen, Wilko & Ferrada, Pablo & Alonso-Montesinos, Joaquín & Ballestrín, Jesús. (2017). Sunbelt Spectra comparison with Standard ASTM G173: the Chilean case. AIP Conference Proceedings. 2033. 10.1063/1.5067195.

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FIREX – AQ Mission

FIREX-AQ

FIREX – AQ Mission

Approximately half of fire emissions in the US are from Northwestern wildfires and half are from prescribed fires that burn mostly in the Southeast US. Wildfires burn slightly more fuel and therefore have overall larger emissions, but prescribed fires dominate the area burned and the number of fires. FIREX-AQ will investigate both wild and prescribed fires. Wildfires generally result in exposures with larger pollution concentrations over larger areas, and cause both local and regional air quality impacts. Their emissions are often transported thousands of miles and can impact large regions of the US at a time. Prescribed fires are usually smaller and less intense than most wildfires but occur more frequently and throughout the whole year. They are usually ignited during periods that minimize population expose and air quality impacts, but can cause regional backgrounds to increase, are generally in closer proximity to populations, and are responsible for a large fraction of the US PM2.5 emissions.

This summer, NOAA and NASA are teaming up on a massive research campaign called FIREX-AQ that will use satellites, aircraft, drones, mobile and ground stations to study smoke from wildfires and agricultural crop fires across the U.S. 

Objective: To improve understanding of wildfire and agricultural fire impacts on air quality, weather, and climate.

Cimel provides a CE376 micro-LiDAR as well as its network of CE318-T photometers through AERONET. These solutions will provide detailed measurements of aerosols emitted from wildfires and agricultural fires to address science topics and evaluate impacts on local and regional air quality, and how satellite data can be used to estimate emissions more accurately.

The Primary Mission Partners are:

COBIACC campaign

COBIACC campaign

Is the rural atmosphere better than elsewhere?

For the entire month of July in Caillouël-Crépigny (France), scientists from the University of Lille and ATMO Hauts-de-France will analyze particles in the air and their impact on health in rural areas.

Since 28 June, more than twenty air pollution measuring devices deployed over 100 m² in the commune of Caillouël-Crépigny (02) may answer this question.

Objectives: To understand the formation and the composition of particles and their precursors in the air in a rural environment during the summer period.

The sensors collect dust from the countryside and nearby dust from forests, roads, buildings and industries in the distance.

The facility consists of four containers installed on 100 m² in the village square of Caillouël-Crépigny. They accommodate twenty-two observation instruments including our Cimel Sun Sky Lunar CE318-T photometer as well as our CE376 micro-LiDAR. These instruments, unique in France, measure the impact of climate change on air quality, biodiversity and health. Thirty researchers take turns night and day to study the chemical modifications of particles during periods of high heat.

This campaign was named COBIACC for Campagne d’OBservation Intensive des Aérosols et précurseurs à Caillouël-Crépigny. It is the result of a partnership between Labex CaPPA, a laboratory of excellence in Lille, CPER Climibio, an environmental project involving 16 laboratories in the Hauts-de-France and Atmo Hauts-de-France, the regional air quality observatory.

Laboratories involved:

MSc Atmospheric Environment

MSc Atmospheric Environment: international master degree

The International Master of Science 2nd year “Atmospheric Environment” at the University of Lille is providing a 1-year program in physics and chemistry of the atmosphere at the highest level.
It is supported by the French Laboratory of Excellence CaPPA (Chemical and Physical Properties of the Atmosphere).

Training is dedicated to students in physics and chemistry having validated 4 years of study (Master 1st year / Bachelor / 240 ECTS-credits), wishing to follow a specialization in atmospheric sciences to get a strong background in theory and practical works.

Students are immersed in an international environment and all courses are delivered in english.
The first semester (Sept-Jan) is dedicated to lectures/practical works, and the second semester (Feb-Jul) is a full-time research training in Laboratory

Additional documents:
Download the brochure
Presentation slides
=> request for powerpoint version, e-mail Anne Burlet-Parendel

Download the welcome booklet 2018-2019

You can also find more details about the program on the website: http://www.labex-cappa.fr/master-atmospheric-environment


 

ILRC29 – International Laser Radar Conference (Hefei – China)

ILRC29 – International Laser Radar Conference (Hefei – China)

June, 24-28 2019

After 50 years, for the first time, the 29th ILRC came to China! ILRC is held biennially under the oversight of the ICLAS, of the International Radiation Commission (IRC). The 29th ILRC was co-hosted by six institutes/universities in China and supported by the Chinese Academy of Sciences and Hefei municipal government. It is also persistently supported by the National Aeronautics and Space Administration (NASA), the European Space Agency (ESA), and many international/national partners and enterprises.

During the 29th ILRC, the new lidar technologies and techniques for profiling the aerosol and clouds, trace gases, water vapor, temperature, turbulence and 3D-wind were explored. The application of lidar networking and space-borne lidars were  investigated. Emphasis was given to weather forecasting, environmental and climate change investigations combined with multiple instruments and platforms. The lidar technologies extended to ocean, land surface and biological applications were also present.

The 29th ILRC was an excellent opportunity to share and exchange ideas. We would like to thank everyone who came at Cimel’s booth and poster presentation during ILRC29. We were pleased to welcome you all!

Paris declares itself in a “state of climatic emergency”

Paris declares itself in a “state of climatic emergency”

July 9, 2019

The City of Paris has adopted the creation of an “IPCC” (Intergovernmental Panel on Climate Change), which will bring together experts (climatologists, urban designers, sociologists, etc.). They will be able to be consulted and play a “constant role in the implementation of climate policies”.

Like many world cities or more recently the Parliaments of the United Kingdom and Ireland, the City of Paris has declared itself in a “state of climatic emergency“. This decision was taken during a vote in the Paris Council on Tuesday, July 9. We must “meet the objectives of the Paris Agreement” adopted in December 2015, argued the assistant in charge of the Environment to the mayor of Paris, Célia Blauel.

Creation of an “IPCC Paris”

During the session, the City of Paris adopted the creation of an “IPCC Paris” which will bring together experts (climatologists, urban designers, sociologists…). They will be able to be consulted and play a “constant role in the implementation of climate policies”, added Célia Blauel.

A few months before the municipal elections, the mayor of Paris Anne Hidalgo and her entourage have not ceased to multiply ecological projects: after the pedestrianisation of the roads on the banks, the Paris City Hall has, among other things, multiplied projects in favour of a complete greening of the streets and squares of the capital or announced the creation of “urban forests” in the middle of the city to fight against global warming and the effects of pollution.