Podcasts about Volcanic ash

Exploring the Journey of the Jaredites: Volcanic Ash and Ancient Navigation

AP correspondent Charles de Ledesma reports villagers on a remote Indonesian island evacuated after a deadly volcano eruption.

Today in 1982, British Airways Flight 009 made a successful landing in Jakarta, Indonesia, after ash from a nearby volcano had shut down all of the plane's engines. Plus: today in 2022, six new high school graduates in Port Jefferson, New York had to quickly duck out of the commencement ceremonies to go fight a fire. When volcanic ash stopped a Jumbo at 37,000ft (BBC) These high school seniors raced away from graduation to fight a fire (Washington Post) Help keep our show flying high as a backer on Patreon --- Send in a voice message: https://podcasters.spotify.com/pod/show/coolweirdawesome/message Support this podcast: https://podcasters.spotify.com/pod/show/coolweirdawesome/support

Dr. Don and Professor Ben talk about the risks of drinking a cocktail using ice from a core sample from your birth year. Dr. Don - not risky

Dr Chris Smith and the Naked Scientist team discover: Why we need stricter smoking and vaping controls and will they work? The remains of what's believed to be the largest reptile to have roamed our Severn Seas. A tribute to the BA pilot who saved his air passengers from a volcanic ash cloud – so why are volcanoes so disastrous for jet engines? Finally, a look at how food production will cope with climate change in the future.

Tonga's main island of Tongatapu facing power outages due to volcanic ash corroding power lines.

In the year 79 CE, Mount Vesuvius erupted and destroyed the Roman city of Pompeii. We have an eyewitness account describing the horrors of an event which certainly seemed like the end of the world. The volcanic ash preserved the city for centuries. Now most of Pompeii has been excavated and we can see how the ancient Romans lived. 

Traditional houses collapsing due to Bougainville volcanic ash.

The project takes advantage of ash from a 2021 eruption on the Caribbean island of St. Vincent. Learn more at https://www.yaleclimateconnections.org/

https://youtu.be/NDvtLaDo1J8 she comin... #2023 #art #music #movies #poetry #poem #food #photooftheday #volcano #news #weather #monkeys #climate #horse #puppy #fyp #love #instagood #onelove #eyes #getyoked #horsie #gotmilk #book #shecomin #getready 

The Salar de Atacama in Chile is a large, dry salt flat surrounded by mountain ranges and is one of the driest places on Earth. Parts of the Atacama Desert have gone without rain for as long as people have been keeping track. Water rich in dissolved salts lies beneath this flat surface and it […]

Composite materials are comprised of at least two parts: the reinforcement, which provides special mechanical properties such as stiffness or strength, and the matrix material, which holds everything together. Ceramic matrix composites (CMCs) are a special type of composite material in which both the reinforcement (refractory fibers) and matrix material are ceramics. In some cases, the same kind of ceramic is used for both parts of the structure, and additional secondary fibers may also be included.   Check out our MSE Company Database and free professional development guide for materials scientists and engineers!   In today's episode, Dr. Valerie Wiesner, a Research Materials Engineer at NASA, shares her research about high temperature ceramics with the goal of making space travel more routine, as well as her experiences working in both aeronautics and space research within NASA.   In this conversation, we discuss:  

Researchers from across the country have gathered at NASA Armstrong Flight Center in California to find a solution to the unavoidable hazard of volcanic ash.

In this Episode we got to chat with Montana Grow!  Montana Grow is a volcanic ash soil amendment, high in silicon, which has shown a reduction in biotic and abiotic stress in turfgrass.  Give it a listen, read some articles and see if this is something you might want to incorporate into your lawncare plan! www.montanagrow.com IG: @MontanagrowKeep Off The Grass Lawn of the Week is proudly Sponsored by ProPEAT Fertilizers www.Propeat.com IG:@propeat1We're happy to be supported by Simple Lawn Solutionswww.Simplelawnsolutions.comIG: @simplelawnsolutions Code "KOTG" for 5% off Join us LIVE every Tuesday night on YouTube-jump in the chat, weigh in, and try to win a giveaway!  SUBSCRIBE!!!www.youtube.com/keepoffthegrasslivecast Follow us on Instagram! www.Instagram.com/keep.off.the.grass Check out our website for more info and merchwww.KOTG.live The Keep Off The Grass Livecast is a collaborative effort of DIY lawncare enthusiasts seeking to pool our knowledge and learn from each other.  As always, be sure to research what is right for your lawn, as well as what products and application rates are acceptable and appropriate for your area, and don't forget to add .edu to ANY lawncare search for professional turf grass publications!

Ken Ridgway tells us that in order to understand how the world works, we have to be able to study sedimentary rocks, and looking at an active area now helps us see what might have happened in the past. He sets up camp in active earthquake areas of Alaska and intensively researches the sedimentary rocks to discover clues to the past and make connections to today's world. Ken Ridgway is a researcher and Professor of Geology and Geophysics in the Department of Earth, Atmospheric, and Planetary Sciences at Purdue University.

The Kingdom of Tonga in the southwestern Pacific Ocean, east of Australia and Fiji, is made up of around 170 islands. On January 15, 2022, several islands were impacted by the massive eruption of an undersea volcano. The effects this volcano had on the islands as well as on the people of Tonga are Worth Noting.Links:“Tonga undersea volcano eruption released up to 18 megatons of energy” (Space.com, Jan. 26, 2022)“Tonga Needs Rain and More Brooms After Volcano Eruption Spewed Ash” (The Wall Street Journal, Jan. 26, 2022)Sources consulted:“Dramatic Changes at Hunga Tonga-Hunga Ha‘apai“ (Earth Observatory, Apr. 10, 2022)“NASA researchers have an estimate of the power of a massive volcanic eruption that took place on Saturday near the island nation of Tonga.⁠” (@NPR, Instagram, Jan. 19, 2022) “Tonga” (Britannica, accessed Jan. 21, 2022)“Before & after images reveal impact of undersea volcano eruption and tsunami in Tonga” (USA Today, Jan. 22, 2022)“NASA Says Tonga Eruption Was More Powerful Than an Atomic Bomb” (Smithsonian Magazine, Jan. 25, 2022)“Satellite images show the aftermath of Tonga volcano's eruption” (NPR, Jan. 26, 2022)

Explosive volcanic ash is made up of microscopic silica that can scratch aircraft windshields and shut down engines in flight.

DuByne creator of the ADAPT 2030 channel on YouTube along with Mike Winner and Dr. Berre Lando from Alfa Vedic discuss changes in consciousness and frequency on Earth as the Sun moves into its 400+ year cycle affecting global crop production, the economy and everyone on our planet. Can we learn from the past and push knowledge boundaries to engage with new science? Alfa Vedic Home Page  AlfaCast Alfa Vedic Podcast  https://alfavedic.com/category/alfacast/ Alfa Vedic YouTube Channel  Support the ADAPT 2030 Mini Ice Age Conversations Podcast by Visiting my Sponsors: ADAPT 2030 (PATREON) My Patriot Supply Emergency Food Kit Hemplucid True Leaf Market Heirloom and Organic Seeds ADAPT 2030 AMAZON SHOP

Airline Jet Engines. Airline pilot theory and jet engine operation. Accident - British Airways 09, Jakarta Incident, "all four engines have failed".Visit getstripes.co or email us to say hi.Episode transcript, links, reading and notes here.Episode Outline:00:00 - Introduction00:26 - Axial Flow and Bypass size01:14 - Principle of Jet Power02:25 - History, Whittle and War06:30 - Centrifugal Engine Evolution07:52 - Jet Engine Technical Description10:42 - Components10:59 - Compressors14:32 - Combustion Chamber16:20 - Turbine18:53 - Summary of Airflow and Engineering20:02 - Pilots Point of View24:56 - Jet Engines as Hazards26:19 - Systems29:15 - Engine Failure31:58 - British Airways 0950:08 - Outro 

This question came up in the 'Lovefly Fear of Flying' Facebook Group so, Capt. Steve and Paul Tizzard discussed it.  lovefly.co.uk   Intro Music 'Fearless' Daniel King

Altitude is a monthly podcast from NATS. It's now 11 years since a huge volcanic eruption in Iceland grounded flights across the UK and much of northwest Europe. For six days in April 2010, the eruption of Eyjafjallajökull (or E-15) left millions of passengers stranded around the world. Fears over the effect of flying through clouds of ash rich in particles of glass left the industry, regulators and policy makers all struggling to grabble with what was then an event on an unprecedented scale. But what really happened behind closed doors 11 years ago and what has changed since? What lessons did the industry learn from 2010 and what will happen during the next, inevitable eruption? In this special episode of Altitude we'll hear from the controllers and pilots who worked through the crisis, learn about the changes the industry has pioneered since, and get a preview of the huge pan-industry exercise due this autumn.  Enjoy the show and find out more at nats.aero/altitude(Originally broadcast in August 2021)

Haze over Metro a Result of Icelandic Volcanic Ash - Justin Boudreau Environment Canada by VOCM

Volcanic eruptions are incredibly powerful but not well understood. When a volcano erupts it can spread ash far and wide both in the ocean and in the air. What happens when a volcano erupts underwater? How much energy does an underwater volcano unleash? Where does all the energy in an underwater volcanic eruption go? Is it possible for volcanic ash to form and spread underwater? Just like jetstream currents in the air, volcanic ash can be carried far and wide in underwater eruptions. Volcanic ash can get held up by smaller particles, to raft long distances. T. Dürig, J. D. L. White, A. P. Murch, B. Zimanowski, R. Büttner, D. Mele, P. Dellino, R. J. Carey, L. S. Schmidt & N. Spitznagel. Deep-sea eruptions boosted by induced fuel-coolant explosions. Nature Geoscience, June 2020 DOI: 10.1038/s41561-020-0603-4 Samuel S. Pegler, David J. Ferguson. Rapid heat discharge during deep-sea eruptions generates megaplumes and disperses tephra. Nature Communications, 2021; 12 (1) DOI: 10.1038/s41467-021-22439-y Eduardo Rossi, Gholamhossein Bagheri, Frances Beckett, Costanza Bonadonna. The fate of volcanic ash: premature or delayed sedimentation? Nature Communications, 2021; 12 (1) DOI: 10.1038/s41467-021-21568-8

AccuWeather Daily brings you the top trending weather story of the day - every day.

AccuWeather Daily brings you the top trending weather story of the day - every day.

In a week where: Prince Philip dies aged 99. DMX dies aged 50. St Vincent's volcano La Soufriere erupts for the first time since '79, engulfing the entire island in Volcanic Ash. Hideki Matsuyama wins the 2021 Masters and becomes the first Japanese male golfer to win a major championship. Minneapolis protests once again after 20-Year-Old Duante Wright dies at the hands of a cop who shoots him with intention of tasing him. In the first of two Life segments: (10:10) The recent finding of the body of Richard Okorogheye has shined a light on how we and the police respond to missing peoples cases. And the figures on how many of them are black are alarming.In Film/TV: (30:16) Hank Azaria, most famous for his work on The Simpsons, has recently talked about the steps he's taken since ditching the role of Apu for the reasons of... You know. He's white. And it seems the steps he has taken so far have been not too bad.In the 2nd Life segment: (41:56) It has been 40 years since the Brixton "Riots" and from the oral retrospective of a few people that were there, we can draw parallels to what is going on now for young black Brits.Lastly, in Music: (56:19) The one-of-one DMX has passed. A life that was filled with demons in many forms and a willingness to share every single one of them with the world.Thank you for listening! If you want to contribute to the show, whether it be sending me questions or voicing your opinion in any way, peep the contact links below and I'll respond accordingly. Let me know "What's Good?"Rate & Review: https://ratethispodcast.com/whatsgood5epnE-Mail: the5thelelmentpub@gmail.comTwitter & IG: @5thElement_UK5E Community Discord: https://discord.gg/QApwabPWebsite: www.the5thelement.org.ukIntro Music - "Too Much" By VanillaInterlude - "Charismatic" By NappyHighChillHop Music - (https://chillhop.bandcamp.com)

In this episode, Dr. Jones explains why even a distant volcanic eruption could impact you where you are. From the ash that impacts air travel to gases that can kill thousands, volcanos emit more than lava that can impact the entire world.

In this episode, Dr. Jones explains why even a distant volcanic eruption could impact you where you are. From the ash that impacts air travel to gases that can kill thousands, volcanos emit more than lava that can impact the entire world.

Dr. Nigma Talib joins America's Podcaster, Kurt Caceres, to divulge her secret alter ego, a Vampress, who performs Vampire Facials on her clients, taking their own blood and rubbing it all over their face. Just Kidding! Though it has taken on the moniker of "Vampire Facial", she calls it "IPL Skin Resurfacing", and it is the rave of all the celebrities and anyone wanting to look and feel younger. Men are the fastest growing segment in the Aesthetics industry, almost 400% faster than women. Dr. Nigma Talib says that men are becoming more aware and educated of the benefits and treatments available, and no longer is it only a female routine. She has created a popular cleanser made from Volcanic Ash, White Willow Bark and many other ingredients, that make her sound more Alchemist than Doctor. But after five years of laboratory research in Switzerland, she created the perfect concoction for the face. She gives us some final advice on how best to battle insomnia and anxiety, two of the biggest ailments American's battle day and night. Break out the Witches brew and Wooden stakes, it's time to enter the cauldron of Dr. Nigma Talib.XXPlease Follow and Subscribe to the Podcast. Email anytime to podcast@provenanceroom.com“Spread the Word, not the Virus”Xhttps://www.instagram.com/kurt_caceres/Xhttps://www.instagram.com/rollcall.podcast/Xhttps://www.instagram.com/provenance_room/Xhttps://www.provenanceroom.com/rollcall

Only in Hollywood would a name like "Vampire Facial" be associated with skin care and longevity. But it's a real treatment that Dr. Nigma Talib calls IPL skin resurfacing. All the actors and celebrities swear by it, and she sits with America's Podcaster, Kurt Caceres, to describe the process. She also talks about ingredients such as Volcanic Ash and White Willow Bark that she spent five years in a Swiss lab perfecting for her popular Cleanser #1. Trillions of bugs are in our gut, more than there are insects on the entire planet Earth, and she emphasizes the importance of improving our Microbiome. Hollywood is an industry of glamour and physical appearance, one of which many will do anything to get the competitive edge. The good news is that all these treatments and therapy are readily available for anyone and everyone, not just the Hollywood elite. Dr. Nigma Talib says there is "NO one size fits all", each person requires their own personal guideline catered to their individual necessities. XXPlease Follow and Subscribe to the Podcast. Email anytime to podcast@provenanceroom.comXhttps://www.youtube.com/channel/UCRF42UoBNLo9DXv5BYQQCqgXhttps://www.instagram.com/kurt_caceres/Xhttps://www.instagram.com/wyna.podcast/Xhttps://www.instagram.com/provenance_room/Xhttps://www.provenanceroom.com/wyna

Ponzi Scream Ep 60: Volcanic Ash Bracelets w/ Elsa Eli Waithe Comedian Elsa Eli Waithe (@elsajustelsa) talks about how you can be your own boss and meet new people with this one life-changing starter pack Ponzi Scream is a leftist comedy podcast looking at white collar crime, especially in the financial sector. Hosted by David Bradley Isenberg and Danny Felts Recorded and edited by Danny Felts Logo art by Morgan Pielli This week’s graphic by Shannon Manning Theme song by James Harvey Recorded February 23, 2021 #MLM #pyramidschemes #multilevelmarketing #bracelets #sexpert #herbalife

Ponzi Scream Ep 60: Volcanic Ash Bracelets w/ Elsa Eli Waithe Comedian Elsa Eli Waithe (@elsajustelsa) talks about how you can be your own boss and meet new people with this one life-changing starter pack Ponzi Scream is a leftist comedy podcast looking at white collar crime, especially in the financial sector. Hosted by David Bradley Isenberg and Danny Felts Recorded and edited by Danny Felts Logo art by Morgan Pielli This week’s graphic by Shannon Manning Theme song by James Harvey Recorded February 23, 2021 #MLM #pyramidschemes #multilevelmarketing #bracelets #sexpert #herbalife

This week, Ben Esse talks about why we monitor volcanoes and what life in the field is like. The Cosmic Cast is brought to you from the Earth and Solar System team at the University of Manchester. Follow us: Twitter: @earthsolarsystm. Facebook: @earthsolarsystem Instagram: earthandsolarsystem Blog: earthandsolarsystem.wordpress.com/

Alaska is called the last frontier. Adding to its reputation as an untamed land are more than 130 volcanoes.

Chris Smith from the Naked Scientists takes on YOUR questions. Why do you sometimes see a half moon at sunrise? Why do some body hairs never go grey? Could a coin falling from the top of the Empire State Building kill you? What is the Earth's murmur? Why do effects from nuclear disasters like Chernobyl persist for many years? Does the amount of UV from the sun vary between different countries? Why do beans and sprouts make you pass gas? If a volcanic eruption as big as Krakatoa happened today and filled the atmosphere with ash, how long would planes be unable to fly? Could a person survive in... Like this podcast? Please help us by supporting the Naked Scientists

Chris Smith from the Naked Scientists takes on YOUR questions. Why do you sometimes see a half moon at sunrise? Why do some body hairs never go grey? Could a coin falling from the top of the Empire State Building kill you? What is the Earth's murmur? Why do effects from nuclear disasters like Chernobyl persist for many years? Does the amount of UV from the sun vary between different countries? Why do beans and sprouts make you pass gas? If a volcanic eruption as big as Krakatoa happened today and filled the atmosphere with ash, how long would planes be unable to fly? Could a person survive in... Like this podcast? Please help us by supporting the Naked Scientists

David DuByne creator of the ADAPT 2030 channel on YouTube discusses societal changes as our Earth shifts to a cooler climate as the Eddy Grand Solar Minimum intensifies, a 400-year cycle in our Sun which will affect crop production, the economy and everyone on our planet. This is a timeline for what you can expect from now to 2023. USDA worst information release ever, bad numbers release Significant declines in global agriculture this year Is volcanic ash responsible for summer snows in the Northern Hemisphere VEI 4 eruption Ulawan, PNG Look for a volcanic ash shrouded winter coming up in the N. Hemisphere Turkey second summer snow 2019 Hungary coldest July monthly temperatures since 1790 Poland July snow 2019 Romania July snow 2019 Mongolia July snow 2019 Widest jet stream ever seen in the southern hemisphere 3000 miles wide Earth’s magnetic field mover 250 miles in a single week ADAPT 2030 Climate Revolution  https://payhip.com/b/3sVi Support the ADAPT 2030 Mini Ice Age Conversations Podcast by Visiting my Sponsors: True Leaf Market Heirloom and Organic Seeds My Patriot Supply Long Term & Emergency Food  ADAPT 2030 AMAZON SHOP ADAPT 2030 (PATREON) **ADAPT 2030 Social Media**  ADAPT 2030 YouTube Channel OilSeedCrops.org  HOME Page

Susan Stipp discusses her PNAS research article that reveals whether the ash cloud from the 2010 eruption of Iceland's Eyjafjallajökull volcano posed a threat to aircraft, and if the widespread airport closures in Europe were warranted.

Vikendi is coming to console!!  We cover the key features our XBOX and PS4 players will be getting to know over the coming weeks.  Most notable, the new parachuting mechanic. We discuss a variation on the Parachuting Strategy in comparison to the commonly used Wacky Jacky strategy (Link). PC players have now had a few weeks to dig into Vikendi so we launched our focused location highlight series starting with Goroka – Buildings to loot, Early and Mid-Game Strategy, and Unique features you can take advantage of those during combat. A dev report  was released an hour before the recording of this podcast.  We discuss the various changes to the ‘SMG Meta’ that the devs have planned for the test server.  Tommy Gun Aficionados will be sad. Some interesting rumors surfaced about a potential change to the Global PUBG Esports scene.  What would it be like if the EU and NA pro leagues adopt the rules currently in the Asia League? Would you enjoy Ring of Elysium?  Heathy and 1Heart try to convince Trigger to give it a shot (The conversation resulted in an interesting look at what makes BR games so appealing and what opportunities exist for PUBG development in the future - Volcanic Ash as blue zone anyone?) Join us on Discord! Here is the direct link to share with your friends: https://discord.gg/U6Ub9rr This show still features music from the fantastic Spiffy Man!  The track on this episode is “Light Runner.” Winner Winner Instagram - https://www.instagram.com/winnerpodcast/ Find Spiffy Man on Bandcamp: https://sp33fym4n.bandcamp.com And on Spotify: https://open.spotify.com/artist/14e9SQBPPvkdH1rtlHfkhb Your Hosts for this episode: The1Heart MTBtrigger twitter / twitch (Jump Scare - Clip) Grifflicious twitch / twitter / Youtube  (Why you suck at pubg v. 3 - Link) HeathyKeithy twitch

Implants made with volcanic ash are porous like real bone but would dissolve in the body within 18 months as the new bone forms and heals.

What is a volcano? No, seriously, what is a volcano? A lot of film critics at the time whiffed on this one and at least one or two of us were in the wrong too. Volcano: A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface. -Wiktionary La Brea tar pits Predator/prey capture ratios. Biological activity causing the bubbling and subsequent discovery of a bunch of different bacterai that live in there. Larger things we find fossilized there: Sabretooth tigers Mammoths Giant feline looooooooads more Fault lines The different fault types and which of them tend to manifest volcanoes. Spoiler alert: LA has a transform fault which is the kind that is really really really unlikely to sprout a volcano under normal conditions. Transform faults Volcano detection Major monitoring methods looking out for pending eruptions: Seisimic activity Gas! Groundswell - actual deformation of the landscape from the pressure Pompeii/Herculaneum Pyroclastic flow vs lava. The eruption of Mt Vesuvius in 79AD. Casting the cavities that surrounded trapped bodies. Cast of a pompeii body Volcanic dangers Volcanic ash, which is often basically just teeny tiny glass for you to breathe in. Lava temperatures: between holy shit hot and omg holy shit hot.  Lava weather systems. Gasses! Lava fountains. Measures Dams! Backwards or otherwise. The Decade List. Experiencing a volcanic shockwave: YouTube From the movie: a human being melting directly and immediately into mere inches of lava: YouTube Support the show!

The Ash Lab at the University of Canterbury is where geologists test the impact of volcanic ash on all sorts of vital infrastructure.

The Ash Lab at the University of Canterbury is where geologists test the impact of volcanic ash on all sorts of vital infrastructure.

 In this talk, Dr Taltavull will explore the importance of understanding the likelihood of a certain volcanic ash adhering into a substrate by taking into consideration both ash properties and environmental conditions.

Listen to us discuss Kim K's buns and the importance of "me" time!! Is it ok to borrow traditions from other cultures? Vegas vacation with besties and how to overcome "mom guilt". Come find out on Sit With Us. --- Support this podcast: https://anchor.fm/sit-with-us/support

A Pompeii and The Wind Rises Double Header! This week is ripe with adventure as Katey and Patches grab their swords, slip on their sandals and scale Pompeii, the latest blockbuster from vulgar auteurist Paul W.S. Anderson. Then, after hinting at talking about it for months, Patches and David finally discuss Hayao Miyazaki’s final film […]

Global experts in DNA identification are flying to the Philippines to assess whether they can help families to determine, beyond doubt, which of the hundreds of victims of Typhoon Haiyan are their relatives. The International Commission on Missing Persons in Sarajevo used DNA matching to identify the thousands killed in the former Yugoslavia and has since helped in conflict zones around the world. Now, working with Interpol, scientists from the ICMP are called on to assist in victim identification after natural disasters as well, and head of forensic services, Dr Thomas Parsons, tells Adam Rutherford that a team will be sent to the Philippines on Monday.The enormous ash cloud following the 2010 eruption of the Icelandic volcano, Eyjafjallajokell, grounded aircraft across Europe for more than a week and caused unprecedented disruption. Dr Fred Prata has invented a weather radar for ash, and off the Bay of Biscay, his AVOID infra red camera system, the Airborne Volcanic Object Imaging Detector, has just been tested after a ton of Icelandic volcanic ash was dropped by aeroplane into the sky. From France, Dr Prata describes the experiment and Dr Sue Loughlin, Head of Volcanology at the British Geological Survey in Edinburgh, tells Adam how Iceland has become the scientific "supersite" for seismic research.Show Us Your Instrument: Dr Glenn Gibson at the University of Reading with his Robo gut, a full-working model of the human large intestine.Liverpool University's Dr Julian Chantrey, and his PhD student have spent the past 4 years monitoring red squirrels in the Sefton area. Out of the 93 they trapped and blood tested, 5 had antibodies for the normally-deadly squirrel pox, suggesting they had contracted the pox and survived. It's early days but this could mean that reds are developing a level of resistance to the squirrel pox, like rabbits have to myxomatosis. We could be seeing evolution by natural selection in action.Producer: Fiona Hill.

This week in the Planet Earth Podcast - we take a closer look at tiny marine plants, which underpin the entire marine food chain and play a vital role in the Earth's climate. Also, how scientists are using volcanic ash called tefra to tell how people may have responded to rapid environmental changes in the recent past.

This week in the Planet Earth Podcast - we take a closer look at tiny marine plants, which underpin the entire marine food chain and play a vital role in the Earth's climate. Also, how scientists are using volcanic ash called tefra to tell how people may have responded to rapid environmental changes in the recent past. Like this podcast? Please help us by supporting the Naked Scientists

This week in the Planet Earth Podcast - we take a closer look at tiny marine plants, which underpin the entire marine food chain and play a vital role in the Earth's climate. Also, how scientists are using volcanic ash called tefra to tell how people may have responded to rapid environmental changes in the recent past. Like this podcast? Please help us by supporting the Naked Scientists

Aerosol particles are important constituents of the Earth's atmosphere. To quantify effects of aerosol particles, their distribution and properties need to be known. An important tool for the provision of such information is remote sensing. This thesis covers vertically-resolving remote sensing by lidar and vertically-integrating remote sensing by photometer, and thereby considers desert dust aerosols which cause a major uncertainty in climate forecasts, as well as volcanic ash aerosols which, in addition, are relevant for the flight safety of jet-driven aircrafts. Both aerosol types consist of ensembles of particles of varying size, shape, and chemical composition. This thesis aims to improve the retrieval of the physical properties of such mixtures from remote sensing observations, in particular by using Bayesian approaches and improved aerosol models. Three types of retrievals were developed. The first retrieval type applies to lidar observations, assumes spheroidal particle shapes, and is based on a Bayesian Monte-Carlo-approach. It was applied to observations of a pure volcanic ash plume from Iceland on 17 April 2010 over Maisach (Germany) for the retrieval of the mass concentration of the ash particles. The second retrieval type applies to photometer observations in the solar aureole, uses a pre-defined set of ensembles of irregularly-shaped particles, and was applied to observations of the same ash plume. Both methods consistently retrieved a maximum ash mass concentration of about 1.1 milligram per cubic meter over Maisach with an uncertainty range from 0.7 to 1.5 milligram per cubic meter. The third retrieval type searches for ensembles that agree with the observations from both remote sensing techniques; it uses a pre-defined set of ensembles derived from the aerosol database OPAC, but consisting of absorbing and non-absorbing irregularly-shaped particles. This approach was successfully applied to Saharan dust observations, which were performed during the SAMUM field campaigns in Morocco and on the Cape Verde islands. It turned out that, besides the particle shape, also the presence of non-absorbing components strongly influences the backscattering properties of the aerosols. In contrast, aureole radiances are hardly sensitive to particle shape and chemical composition, thus aureole radiances are well-suited for the retrieval of the size of ash and dust particles. It is expected that the accuracy of the retrievals further improves if all parameters observed by photometer are considered.

This week in the Planet Earth Podcast, how last year's eruption of the Eyjafjallajkull volcano in Iceland gave scientists an unparalleled opportunity for research, and why sediment from rivers like the Thames can act like time machines to bygone eras.

This week in the Planet Earth Podcast, how last year's eruption of the Eyjafjallajkull volcano in Iceland gave scientists an unparalleled opportunity for research, and why sediment from rivers like the Thames can act like time machines to bygone eras. Like this podcast? Please help us by supporting the Naked Scientists

This week in the Planet Earth Podcast, how last year's eruption of the Eyjafjallajkull volcano in Iceland gave scientists an unparalleled opportunity for research, and why sediment from rivers like the Thames can act like time machines to bygone eras. Like this podcast? Please help us by supporting the Naked Scientists

Susan Stipp discusses her PNAS research article that reveals whether the ash cloud from the 2010 eruption of Iceland's Eyjafjallajökull volcano posed a threat to aircraft, and if the widespread airport closures in Europe were warranted.

Could a comet shield the earth from the sun? How do planets form around stars? Why are planets spherical? What's the temperature in space? We tackle these astronomical questions in this weeks show as well as reveal why there isn't a cure for the common cold, why 3D glasses make some of us feel dizzy and if volcanic ash can disrupt space travel. Plus, we investigate what the Hubble Telescope sees in space! Like this podcast? Please help us by supporting the Naked Scientists

Could a comet shield the earth from the sun? How do planets form around stars? Why are planets spherical? What's the temperature in space? We tackle these astronomical questions in this weeks show as well as reveal why there isn't a cure for the common cold, why 3D glasses make some of us feel dizzy and if volcanic ash can disrupt space travel. Plus, we investigate what the Hubble Telescope sees in space! Like this podcast? Please help us by supporting the Naked Scientists

Hints and Tips for media appearances, speaking and social media. This week; Volcanic Ash; Leadership Debates; Want to be on TV?; Ebay to the Rescue; A Dozy Mayor; The Art of Debates; Grabbing a Reporter's Attention; Talk to your Customers; An Interview with Rory Cellan-Jones; Music from Georgia Wonder

A look at climatic effects that have occurred from the eruption of volcanoes through history.

Transcript -- A look at climatic effects that have occurred from the eruption of volcanoes through history.

A look at climatic effects that have occurred from the eruption of volcanoes through history.

Transcript -- A look at climatic effects that have occurred from the eruption of volcanoes through history.