Pompiers 13 @Pompiers_13 4 h il y a 4 heures
🔴[#Information]
Aujourdhui mercredi, les @PompiersFR effectuent un #brûlagedirigé sur @allauch secteur du Mont Julien
⚠️ des fumées seront visibles mais les #pompiers13 seront déjà sur place 🚒
L'objectif principal est de réaliser des coupures de combustible avant l'été.
NASA Compte certifié @NASA
Tomorrow, we'll hold a briefing at 2pm ET from @NASAJPL, where we'll talk about the status of our @MarsRovers Opportunity. We last heard from the rover on June 10, 2018, as a massive dust storm blanketed the Red Planet. Details:
https://go.nasa.gov/2SRRBSY Feb. 12, 2019
MEDIA ADVISORY M19-007
NASA to Share Results of Effort to Recover Mars Opportunity Rover
NASA Mars Exploration Rover Opportunity
Illustration of a NASA Mars Exploration Rover at work on Mars. Opportunity was the second of two Mars Exploration Rovers to land on the Red Planet in 2004 to search for signs of past life.
Credits: NASA/JPL-Caltech
NASA will discuss the status of its Mars Exploration Rover (MER) Opportunity in a media briefing at 2 p.m. EST (11 a.m. PST) Wednesday, Feb. 13, from the agency’s Jet Propulsion Laboratory (JPL) in Pasadena, California. The briefing will air live on NASA Television, the agency's website and YouTube.
The briefing will follow NASA’s last planned attempts to communicate with Opportunity late Tuesday evening. The solar-powered rover last communicated with Earth June 10, 2018, as a planet-wide dust storm was blanketing the Red Planet.
Briefing participants will include:
NASA Administrator Jim Bridenstine
Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate
Lori Glaze, acting director of NASA’s Planetary Science Division
Michael Watkins, JPL director
Steve Squyres, MER principal investigator at Cornell University
John Callas, MER project manager
Matt Golombek, MER project scientist
Abigail Fraeman, MER deputy project scientist
Jennifer Trosper, Mars 2020 project systems engineer
Media who would like to attend the briefing must make arrangements in advance with Elena Mejia of JPL Media Relations at
elena.mejia@jpl.nasa.gov or 818-354-5011. Valid media credentials are required, and non-U.S. citizens must bring a valid passport. To participate by phone, media should RVSP to Mejia with their name and affiliation by 1 p.m. EST (10 a.m. PST) Wednesday, Feb. 13.
The public can ask questions on social media using the hashtag #askNASA or by leaving a comment in the chat section on YouTube.
A recording of the briefing will be available shortly after its conclusion at:
http://www.ustream.tv/nasajplNASA's twin robot geologists, Spirit and Opportunity, landed on the Mars in 2004 in search of answers about the history of water on the planet. Spirit concluded its mission in 2010. JPL manages Spirit and Opportunity for NASA.
For more information about the Mars Exploration Rover program, visit:
https://www.nasa.gov/mission_pages/mer-end-
Dwayne Brown / JoAnna Wendel
Headquarters, Washington
202-358-1726 / 202-358-1003
dwayne.c.brown@nasa.gov /
joanna.r.wendel@nasa.govDC Agle / Jia-Rui Cook
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011 / 818-354-0724
agle@jpl.nasa.gov /
jccook@jpl.nasa.govLast Updated: Feb. 12, 2019
Editor: Karen Northon
Tags: Jet Propulsion Laboratory, Mars Exploration Rovers (Spirit and Opportunity), Moon to Mars
et
Antarctica.cl @Antarcticacl
13 h il y a 13 heures
#Nubes Bajas reflejan mucha RadiaciónSolar al espacio, lo q causa Señal de Enfriamiento q
compensa en algo CalentamientoGlobal. Señal de Enfriamiento depende de concentración
de gotas, q a su vez depende de cantidad de #Aerosoles (partículas en suspensión)
http://science.sciencemag.org/content/363/6427/eaav0566 …
Aerosol-driven droplet concentrations dominate coverage and water of oceanic low-level clouds
Daniel Rosenfeld1,2,*,†, Yannian Zhu3,†, Minghuai Wang2,4,*, Youtong Zheng5, Tom Goren6, Shaocai Yu7,8,9,*
See all authors and affiliations
Science 08 Feb 2019:
Vol. 363, Issue 6427, eaav0566
DOI: 10.1126/science.aav0566
Reflections on cloud effects
How much impact does the abundance of cloud condensation nuclei (CCN) aerosols above the oceans have on global temperatures? Rosenfeld et al. analyzed how CCN affect the properties of marine stratocumulus clouds, which reflect much of the solar radiation received by Earth back to space (see the Perspective by Sato and Suzuki). The CCN abundance explained most of the variability in the radiative cooling. Thus, the magnitude of radiative forcing provided by these clouds is much more sensitive to the presence of CCN than current models indicate, which suggests the existence of other compensating warming effects.
Science, this issue p. eaav0566; see also p. 580
Structured Abstract
INTRODUCTION
Human-made emissions of particulate air pollution can offset part of the warming induced by emissions of greenhouse gases, by enhancing low-level clouds that reflect more solar radiation back to space. The aerosol particles have this effect because cloud droplets must condense on preexisting tiny particles in the same way as dew forms on cold objects; more aerosol particles from human-made emissions lead to larger numbers of smaller cloud droplets. One major pathway for low-level cloud enhancement is through the suppression of rain by reducing cloud droplet sizes. This leaves more water in the cloud for a longer time, thus increasing the cloud cover and water content and thereby reflecting more solar heat to space. This effect is strongest over the oceans, where moisture for sustaining low-level clouds over vast areas is abundant. Predicting global warming requires a quantitative understanding of how cloud cover and water content are affected by human-made aerosols.
RATIONALE
Quantifying the aerosol cloud–mediated radiative effects has been a major challenge and has driven the uncertainty in climate predictions. It has been difficult to measure cloud-active aerosols from satellites and to isolate their effects on clouds from meteorological data. The development of novel methodologies to retrieve cloud droplet concentrations and vertical winds from satellites represents a breakthrough that made this quantification possible. The methodologies were applied to the world’s oceans between the equator and 40°S. Aerosol and meteorological variables explained 95% of the variability in the cloud radiative effects.
RESULTS
The measured aerosol cloud–mediated cooling effect was much larger than the present estimates, especially via the effect of aerosols on the suppression of precipitation, which makes the clouds retain more water, persist longer, and have a larger fractional coverage. This goes against most previous observations and simulations, which reported that vertically integrated cloud water may even decrease with additional aerosols, especially in precipitating clouds. The major reason for this apparent discrepancy is because deeper clouds have more water and produce rainfall more easily, thus scavenging the aerosols more efficiently. The outcome is that clouds with fewer aerosols have more water, but it has nothing to do with aerosol effects on clouds. This fallacy is overcome when assessing the effects for clouds with a given fixed geometrical thickness.
The large aerosol sensitivity of the water content and coverage of shallow marine clouds dispels another belief that the effects of added aerosols are mostly buffered by adjustment of the cloud properties, which counteracts the initial aerosol effect. For example, adding aerosols suppresses rain, so the clouds respond by deepening just enough to restore the rain amount that was suppressed. But the time scale required for the completion of this adjustment process is substantially longer than the life cycle of the cloud systems, which is mostly under 12 hours. Therefore, most of the marine shallow clouds are not buffered for the aerosol effects, which are inducing cooling to a much greater extent than previously believed.
CONCLUSION
Aerosols explain three-fourths of the variability in the cooling effects of low-level marine clouds for a given geometrical thickness. Doubling the cloud droplet concentration nearly doubles the cooling. This reveals a much greater sensitivity to aerosols than previously reported, meaning too much cooling if incorporated into present climate models. This argument has been used to dismiss such large sensitivities. To avoid that, the aerosol effects in some of the models were tuned down. Accepting the large sensitivity revealed in this study implies that aerosols have another large positive forcing, possibly through the deep clouds, which is not accounted for in current models. This reveals additional uncertainty that must be accounted for and requires a major revision in calculating Earth’s energy budget and climate predictions. Paradoxically, this advancement in our knowledge increases the uncertainty in aerosol cloud–mediated radiative forcing. But it paves the way to eventual substantial reduction of this uncertainty.
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Coverage and droplet concentrations (Nd) of shallow marine clouds over the northeast Pacific.
Smoke particles emitted from ship smokestacks form cloud droplets and elevate Nd. The smoke-free clouds (Nd < ~30 cm−3) precipitate and break up. The fraction of cloud cover increases with more Nd that suppresses precipitation. The solid cloud cover is maintained by smoke that was spread from old ship tracks, crossed by newer ones.
ainsi que,
ESA EarthObservation
Compte certifié @ESA_EO
25 minil y a 25 minutes
To love❤️your planet is to take care of it!
Moorea island's relatively still pristine coral reefs are threatened by pollution/fishing and Strobel lake waters have a very unique ecosystem: #EO satellites 🛰️ can help us help them thrive.
http://www.esa.int/Our_Activities/Observing_the_Earth/Island_love … #EarthBeMine
11 February 2019
With Valentine’s Day around the corner, we will soon be expressing our love to those nearest and dearest – and maybe that can include our beautiful home planet, after all it needs all the love and care it can get.
Satellite’s orbiting high above primarily deliver critical information to understand how Earth works, monitor how it is changing and also to make our daily lives easier through the myriad of practical applications that rely on satellite data. But images captured from space can also serve as a reminder of Earth’s beauty and, indeed, how fragile it is.
The well-known phrase beauty is in the eye of the beholder means that the perception of beauty is subjective, and with us all ‘beholders’ of our planet – we can all marvel at Earth’s splendor through images from space.
So with Valentine’s Day in mind, we bring you this Copernicus Sentinel-2 image which captures the beauty of the little heart-shaped island of Moorea in the South Pacific.
Moorea is the second largest island in the French Polynesia’s Society Archipelago, about 20 km northwest of Tahiti, the largest island. Moorea is part of a chain of islands formed by hot-spot volcanism. This means that volcanoes are created by ‘fixed’ hot areas in Earth’s mantle. Because of plate tectonics, the plate gradually moves away from over the hotspot, carrying a volcano with it while a new volcanoes form in a chain behind.
These kinds of islands are constantly changing, eroding and sinking back into the ocean over millions of years. However, changes are taking place at a much faster rate because of the marks human activity leaves on the natural landscape and because of climate change.
Moorea is a high island – rugged and mountainous with fertile soils. The image has not only been processed in red for Valentine’s Day, but the processing uses red to highlight vegetation.
Moorea’s lush vegetation is one of the qualities that gives the island its beautiful tropical appearance. However, the island’s vegetation has changed dramatically as human have shaped it for their uses over the 1200 years or so since it was first inhabited.
The island is surround by coral reef. Coral reefs are among the most fragile ecosystems in the world, threatened by fishing and pollution, and rising temperatures, which are linked to ocean acidification – a coral killer. Thankfully, Moorea’s reef is still relatively pristine and is home to an abundance of reef fish and corals that are high in diversity, indicating the robust condition of the ecosystem. However, runoff from agriculture, other pollution, ocean plastics and warming seas remain a threat.
We send our love for Valentine’s, and for that matter every other day of the year, to our beautiful planet Earth.
de plus,
NASA Compte certifié @NASA 9 h il y a 9 heures
ATTENTION! Do you love space & social media? 📸
Want to see a rocket launch, but haven't had the chance? 🚀
Apply to #NASASocial’s April event to experience the #Cygnus spacecraft leaving @NASA_Wallops in Virginia headed for the @Space_Station! Info:
https://go.nasa.gov/2N4j4eONASA
Compte certifié @NASA
9 hil y a 9 heures
ATTENTION! Do you love space & social media? 📸
Want to see a rocket launch, but haven't had the chance? 🚀
Apply to #NASASocial’s April event to experience the #Cygnus spacecraft leaving @NASA_Wallops in Virginia headed for the @Space_Station! Info:
https://go.nasa.gov/2N4j4eOExperience the launch of Northrop Grumman’s CRS-11 mission
We are inviting social media users to apply for credentials to cover the launch of Northrop Grumman's CRS-11 mission to the International Space Station. An Antares rocket carrying the Cygnus cargo spacecraft will liftoff no earlier than 4:46 p.m. EST on April 17 from Pad 0-A at the Mid-Atlantic Regional Spaceport at NASA’s Wallops Flight Facility in Virginia.
A maximum of 50 active social media users will be selected to attend the two-day event April 16-17, 2019 and will be given the same access as news media. Participants should keep in mind that due to the complexity of these launches, it is possible the Antares rocket could launch at a later date beyond its scheduled launch window.
NASA Social participants will have the opportunity to:
Get an up-close view of the launch from the Wallops Island media viewing site
Meet with rocket experts from NASA and Northrop Grumman
Go on a behind-the-scenes tour of Wallops Flight Facility
Meet fellow space enthusiasts who are active on social media
Meet members of NASA's social media teams
Registration for this event is now open. Social media users must apply by 11:59 p.m. EDT on Monday, Feb. 18, 2019. All social media accreditation applications will be considered on a case-by-case basis.
APPLY NOW
Do I need to have a social media account to register?
Yes. This event is designed for people who:
Actively use multiple social networking platforms and tools to disseminate information to a unique audience.
Regularly produce new content that features multimedia elements.
Have the potential to reach a large number of people using digital platforms.
Reach a unique audience, separate and distinctive from traditional news media and/or NASA audiences.
Must have an established history of regularly posting content on social media platforms.
Have previous postings that are highly visible, respected and widely recognized.
Users on all social networks are encouraged to use the hashtag #NASASocial during their visit to NASA’s Wallops Flight Facility.
Updates and information about the event will be shared on Twitter via @NASASocial and @NASA_Wallops, as well as posts to Facebook.
How do I register?
Registration opens on Monday, Feb. 11, 2019. All applications must be submitted by the deadline, 11:59 p.m. EDT on Monday, Feb. 18, 2019. Applications submitted after this deadline will not be reviewed. All social media accreditation applications will be considered on a case-by-case basis.
Can I register if I am not a U.S. citizen?
Yes. International social media users without U.S. citizenship may apply. Those who are selected are required to submit full legal name, date of birth, nationality and passport and visa/ESTA information. To be admitted, you will need to show two government-issued identifications (one must be your passport) that matches the name provided on the registration. Those without proper identification cannot be admitted. All registrants must be at least 18 years old.
If you have a valid permanent resident card, you will be processed as a U.S. citizen.
When will I know if I am selected?
After registrations have been received and processed, a notification email will be sent out to inform you whether or not you have been selected for NASA social media accreditation. We expect to send notifications no later than Friday, Feb. 22.
If you do not make the registration list for accreditation, you can still attend the public viewing of the launch and participate in the conversation online.
What are the registration requirements?
Registration indicates your intent to travel to NASA's Wallops Flight Facility in Virginia and attend the two-day event in person. Participants must attend both days. You are responsible for your own expenses for travel, accommodation, food and other amenities.
Some events and participants scheduled to appear at the event are subject to change without notice. NASA and Northrop Grumman are not responsible for loss or damage incurred as a result of attending. NASA and Northrop Grumman, moreover, are not responsible for loss or damage incurred if the event is canceled with limited or no notice. Please plan accordingly.
Wallops Flight Facility is a federal facility. Those who are selected will need to complete an additional registration step to receive clearance to enter the secure areas.
IMPORTANT: To be admitted, you will need to provide two forms of unexpired government-issued identification; this identification must match the name provided on the registration. Those without proper identification cannot be admitted. For a complete list of acceptable forms of ID, please visit:
http://www.nasa.gov/sites/default/files/atoms/files/i-9_poster_acceptable_documents_2014_04_23.pdfAll registrants must be at least 18 years old.
What if the launch date changes?
Hundreds of different factors can cause a scheduled launch date to change multiple times. The targeted launch date will not be confirmed until after the Flight Readiness Review. If the launch date changes, NASA and Northrop Grumman may adjust programming accordingly to coincide with the new target launch date. NASA will notify registrants of any changes by email.
Attendees are responsible for any additional costs they incur related to any launch delay. We strongly encourage participants to make travel arrangements that are refundable and/or flexible.
What if I cannot come to the event?
If you cannot come to the two-day event and attend in person, you should not register for the NASA Social. You can follow the conversation using the #NASASocial hashtag on Twitter. You can watch the event on NASA Television at
www.nasa.gov/liveNASA will provide regular updates on @NASA and @NASASocial.
If you cannot make this NASA Social, don't worry; NASA is planning many other Socials in the near future at various locations! Check back on
www.nasa.gov/social for updates.
Does registration for and/or attendance at this NASA Social qualify me for news media accreditation?
No, your registration and/or attendance does not qualify you for news media credentials at NASA now or in the future.
Last Updated: Feb. 12, 2019
Editor: Thalia Patrinos
Pompiers Moselle Compte certifié @SDIS57 2 h il y a 2 heures
[#Recrutement] Le SDIS de la Moselle #recrute 3 LT2 : 1 chef de salle - 1 chef de groupe - 1 officier RH/Formation de la 4e compagnie d'incendie et de secours Sarrebourg / Château-Salins. Plus d'informations sur :
https://www.sdis57.fr/home/sapeurs-pompiers-en-moselle/emplois-et-recrutements-spp.html …
En cas d’arrêt cardiaque, chaque minute compte. Lorsqu'une personne signale un arrêt cardiaque aux services de secours de la Moselle, notre application : géo-localise les Premiers Répondants à proximité et leur envoie une alerte afin de leur demander s'ils sont disponibles ou non ; Dès lors qu'un Premier Répondant valide sa disponibilité, l'application le guide jusqu'au lieu de l'arrêt cardiaque ; En fonction, l'application lui indiquera la proximité d’un défibrillateur public et le guidera jusqu’à celui-ci, afin que la victime bénéficie d’un choc électrique dans les plus brefs délais.
AFPR – PREMIERS REPONDANTS
EST UNE APPLICATION D'URGENCE QUI MET EN LIEN IMMÉDIAT LES SERVICES DE SECOURS AVEC LES PREMIERS REPONDANTS GEOLOCALISES A PROXIMITE LORS D’UN ARRET CARDIAQUE (500M EN ZONE URBAINE ET 1KM EN ZONE RURALE). L’APPLICATION GUIDERA LES PREMIERS REPONDANTS DISPONIBLE JUSQU’AU LIEU DE L’INTERVENTION AFIN DE PRATIQUER LES PREMIERS GESTES JUSQU'A LARRIVEE DES SECOURS.
https://www.afprappli.com/l-alerteMOSAÏQUE DU
CITOYEN TIGNARD YANIS
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