Archief OMI Nieuws
Overzicht van alle nieuws berichten (inclusief Engelstalige berichten)
2006
Ozongat groter dan ooit gemeten
Date: 4 oktober 2006Het ozongat boven het Zuidpoolgebied is dit jaar groter dan ooit werd gemeten. Dit volgt uit de meetreeks van de satellietinstrumenten GOME, SCIAMACHY en OMI.
In de analyse van het KNMI was op 1 oktober het ozonverlies groter dan het record in het jaar 2000. Ook de Wereld Meteorologische Organisatie maakt hier nu melding van. Het ozonverlies is de maat voor de hoeveelheid ozon die is afgebroken in het ozongat, en wordt bepaald door zowel het oppervlak als de diepte van het ozongat. Lees verder.
Live OMI measurements of UV radiation on the Earth's surface
Date: 25 July 2006The Finnish Meteorological Institute (FMI) delivers almost live OMI measurements of the amount of UV radiation on the Earth's surface (as UV-index and erythemally weighted dose) and the total amount of ozone in the atmosphere above Central and North Europe. The measurements of these so-called Very Fast Delivery (VFD) products are on-line within 30 minutes after observation.
During several overpasses per day, OMI has direct contact with FMI's Satellite Data Center at Sodankylä in Northern Finland. During those periods, OMI measurements are broadcasted directly to this data center and directly processed, using processing software from KNMI for cloud and ozone products and the software from FMI for UV processing. Read More and see the images at FMI's VFD site.
Hittegolf en vervuiling Groot Brittannië vanuit de ruimte
Datum: 25 juli 2006Terwijl Groot Brittannië zucht onder de hittegolf registreren sensoren in de ruimte (AATSR op ESA's ENVISAT en OMI op NASA's EOS-Aura) een dramatische toename in temperatuur en luchtvervuiling, vooral in de grote steden. Aldus bijgaand persbericht van de University of Leicester.
De Britse meteorologische dienst rapporteerde dat de temperatuur op 19 juli een record maximum heeft bereikt voor de maand juli. Ook de luchtvervuiling als gevolg van stikstofdioxide (NO2) is aanzienlijk gestegen. Lees meer in het door het KNMI vertaalde persbericht.
UK Record Heatwave and Rising Pollution Observed by Eyes in the Sky
Date: 25 July 2006As the UK bakes during this summer's heatwave, sensors in space (AATSR on ESA's ENVISAT and OMI op NASA's EOS-Aura) have been recording dramatic increases in both UK land temperature and in air pollution, particularly in major cities.
During a period of persistent stable summer weather from 15th and 19th July, temperatures rose to record highs for the U.K. and pollution due to nitrogen dioxide (NO2), a respiratory inhibitor, appears to have risen considerably too; the Met Office reported that temperatures on July 19th reached a record maximum for July. Read More in this press release from the University of Leicester.
Satellietmissie Luchtkwaliteit en Klimaat geselecteerd door ESA
Datum: 7 juli 2006De Europese Ruimtevaart Organisatie ESA heeft een satellietmissie, geleid door het KNMI, ten behoeve van luchtkwaliteit en klimaat geselecteerd voor verdere studie. Daarmee is de kans dat deze missie gerealiseerd wordt een stuk groter geworden. In dit z.g. TRAQ voorstel (TRopospheric Composition and Air Quality werkt het KNMI internationaal samen met als belangrijkste partner Frankrijk. SRON en de Nederlandse ruimtevaartindustrie zijn nauw betrokken bij het ontwerp van één van de TRAQ instrumenten (TROPOMI).
Lees meer in het persbericht van het KNMI.
ANTARCTIC OZONE HOLE TO RECOVER LATER THAN EXPECTED
Date: 30 June 2006Scientists from NASA and other agencies have concluded that the ozone hole over the Antarctic will recover around 2068, nearly 20 years later than previously believed. Their findings, with lead author Paul Newman (OMI science team member from NASA-GSFC) have been published today in Geophysical Research Letters (Vol. 33, No. 12.)
For the first time, a model combines estimates of future Antarctic chlorine and bromine levels based on current amounts as captured from TOMS and OMI satellite observations, NOAA ground-level observations, NCAR airplane-based observations, with anticipated future emissions, the time it takes for the transport of those emissions into the Antarctic stratosphere, and assessments of future weather patterns over Antarctica. Read more ...
OMI Measures Volcanic Gas Cloud (quicktime movie 3,2 Mb)
Date: 29 June 2006; update 20 July 2006On May 20, 2006 a major lava dome collapse at the Soufriere Hills volcano on Montserrat (West Indies) triggered an explosive emission of volcanic gases. The resulting gas cloud penetrated the stratosphere, reaching an altitude of ~20 km. Sulfur dioxide (SO2) in this cloud was tracked by OMI for 3 weeks as it moved westwards across the Pacific, before finally dissipating below detection limits over the Indian Ocean on June 11. Read more ...
See also (shorter but with Calipso measurements of same event).
SO2 Emissions from Smelters
Date: 28 June 2006The Peruvian copper smelters are among the world's largest industrial point sources of sulfur dioxide (SO2). OMI is sensitive enough to be able to identify the copper being emitted from the La Oroya and Ilo smelters even though these produce less SO2 than the volcanoes.
In addition to air quality applications, these data provide insights into the different lifetimes, dispersal etc of volcanic vs. industrial emission plumes. Read more ...
First global tropospheric maps show streams of tropospheric ozone crossing the oceans
Date: 28 June 2006The monthly mean maps by the Aura instruments OMI and MLS of tropospheric ozone show pollution streaming from the U.S., Europe and China to the west in summer and pollution from biomass burning in the equatorial zone.
The tropospheric ozone measurements were made by subtracting the MLS stratospheric ozone from OMI column ozone. Read more ...
Asian Dust Storms (movie)
Date: 15 April 2006Asia is suffering through the worst dust storm season in at least five years. The eighth major storm this year clogged the air over China, Korea, and Japan with sand from the Taklamkan and Gobi deserts. The sand picks up a toxic mix of heavy metals and carcinogens as the clouds pass over China's industrial areas, exacerbating health problems due to these storms. Read more ...
Dust Storm over Eastern China
Date: 15 March 2006A large dust storm spread aerosols (airborne particles) over Asia and the Pacific starting on March 9, 2006. The storm reached the Beijing region on March 10, and the tiny particles remained aloft for several more days. The dust cloud remained intense as it migrated eastward from China over Korea and Japan. OMI captured these images on March 9, 11, and 13. Read more ...
2005
Europe's pollution hotspots shown
Date: 9 December 2005Dutch OMI scientists are putting together remarkable maps showing pollution over Europe and other regions of the globe.
One map presented at the AGU conference, pulling together data gathered from May to September this year, showed expected high emissions over some of Europe's cities, and in particular over Antwerp, Rotterdam and the Ruhr. Read more ...
NASA Satellite Eyes Atmosphere to Improve Pollution and Climate Forecasting
Date: 8 December 2005Thanks to the latest sophisticated, satellite-based instruments, local and regional air pollution and their sources can now be observed closely from space. Researchers using new, nearly up-to-the-hour data from NASA's Aura satellite are now tracking important pollutants such as ozone and nitrogen oxide. What's more, the satellite's first global observations of ice in clouds will provide climatologists, weather forecasters and public officials around the world the ability to make better predictions of future climate change. Read more ...
NASA's Aura Satellite Peers Into Earth's Ozone Hole
Date: 7 December 2005NASA researchers determined the seasonal ozone hole that developed over Antarctica this year is smaller than in previous years. NASA's 2005 assessment of the size and thickness of the ozone layer was the first based on observations from the Ozone Monitoring Instrument on the agency's Aura spacecraft Read more ...
Sierra Negra Sulfur Dioxide Emissions
Date: 10 November 2005On October 22, 2005, one of the six volcanic summits on Isla Isabela in the Galapagos Islands archipelago began erupting. The Sierra Negra Volcano continued to emit ash clouds and lava through the end of the month. This image shows the average concentration of sulfur dioxide over the Sierra Negra Volcano from October 23-November 1 measured by OMI. Read more ...
OMI-satellietmetingen luchtvervuiling direct op internet
Datum: 18 oktober 2005Iedere belangstellende kan vanaf vandaag de actuele metingen van de luchtvervuiling op deze site volgen. De metingen van het vorig jaar gelanceerde satelliet meetinstrument OMI zijn nu on-line beschikbaar. Lees meer ...
Daily on-line measurements by OMI of tropospheric NO2 above Europe
Date: 18 October 2005Since Tuesday 18 October everyone can check today's measurements of air pollution by nitrogen dioxide. Tropospheric NO2 amounts derived from measurements of the satellite instrument OMI are available on the KNMI web site within three hours after the observation. Read more ...
OMI meet luchtvervuiling van bosbranden in Portugal
Datum: 26 augustus 2005Portugal wordt al wekenlang geteisterd door grote bosbranden. Bij deze branden komen ook luchtvervuilende gassen als stikstofdioxide en fijne deeltjes (aërosolen) vrij. Op OMI metingen zijn die goed te zien. Lees meer ...
Black Carbon in Smoke over Alaska
Date: 24 August 2005OMI measures smoke by tracking black carbon particles, or soot, that absorb ultraviolet (UV) radiation, even if the smoke is mixed with or floating above clouds. By measuring how much UV radiation the soot absorbs, OMI provides estimates of the amount of black carbon aerosol in the smoke layer. Measurements of how much radiation aerosols absorb are important for scientists trying to calculate the net effect of aerosols on Earth's energy budget and climate. Read more ...
New Measurements of Arctic Ozone
Date: 21 June 2005The winter of 2004-2005 saw the second highest chemical ozone destruction ever observed over the Arctic. Despite this, the lowest total column ozone values in polar regions were slightly higher in March than in January, on average. Stratospheric winds carried the ozone north into the Arctic, compensating for the significant chemical loss. And even though ozone values appeared to be near normal on average throughout March, some regions experienced much lower ozone levels -- and therefore, a greater exposure to UV light -- on an individual day. Read more ...
Gegevens Ozonmeetinstrument OMI actueel op internet
Datum: 26 mei 2005De actuele ozonmeetgegevens van het nieuwe Nederlands-Finse ozonmeetinstrument OMI zijn vanaf vandaag voor iedereen dagelijks via internet te volgen. De ruimtevaartorganisatie NASA heeft na grondig onderzoek naar de kwaliteit van de ozonmeetgegevens groen licht gegeven voor publicatie van de metingen. Op de NASA website http://toms.gsfc.nasa.gov zijn zowel data als beelden beschikbaar. Lees meer ...
Mondiale luchtvervuiling nauwkeuriger in kaart gebracht
Datum: 9 mei 2005Metingen van luchtvervuiling met satellieten geven tegenwoordig een betrouwbaar beeld van de luchtkwaliteit, maar kunnen verder worden verbeterd. Op donderdag 12 mei a.s. verdedigt Folkert Boersma van het KNMI aan de Technische Universiteit Eindhoven (TU/e) zijn proefschrift over het meten van stikstofdioxiden met satellietinstrumenten. Lees meer ...
Explosive eruption of Anatahan volcan
Date: 4 May 2005Explosive volcanic eruptions inject gases and ash into the Earth's atmosphere, creating hazardous conditions for passing aircraft and the potential for climate effects.
The above image of Anatahan shows sulfur dioxide concentrations in the atmosphere on April 7, 2005, over 30 hours after the eruption, as measured by EOS-Aura OMI and MLS instruments. Read more ...
Weerbericht van de luchtkwaliteit
Datum: 2 May 2005Verbeterde satellietmetingen van luchtvervuiling bieden de mogelijkheid voor nieuw soort weerbericht, zoals een dagelijkse verwachting voor de luchtkwaliteit. Lees meer ...
OMI Sees the Soot Within Smoke
Date: 13 April 2005In the summer of 2004, more than 6.7 million acres went up in flames in Alaska. Smoke spread as far as Texas and Newfoundland. On August 21, 2004, two NASA satellites observed thick layers of soot-laced smoke billowing from the fires: Aqua's Moderate Resolution Imaging Spectroradiometer (MODIS) and Aura's Ozone Monitoring Instrument (OMI). Read more ...
Eruption of Anatahan volcano
Date: 31 January 2005A long plume of sulfur dioxide extends northeast and southwest of the Anatahan volcano in the Northern Mariana Islands in the western Pacific Ocean. The volcano has been erupting almost continuously since January 5, 2005, when it started its third eruption in recorded history.
This image, collected by the Ozone Monitoring Instrument on NASA's Aura satellite, shows sulfur dioxide concentrations in the atmosphere between January 31 and February 4, 2005. Read more ...
Continued eruption of Manam volcano
Date: 28 January 2005When the Manam volcano erupted explosively in the middle of the night on January 27, 2005, it sent a cloud of ash and sulfur dioxide over New Guinea. The large eruption killed at least one person, injured several others, and destroyed the volcano monitoring station on the small volcanic island. About 12 hours after the eruption (January 28), the Ozone Monitoring Instrument (OMI) flew over on NASA's new Aura satellite. This image was produced from preliminary, uncalibrated data provided by OMI. Read more ...
Dutch schools help scientists validate aerosol measurements via GLOBE project
Date: 25 January 2005What if, every day, a global network of students collected and shared measurements of small solid and liquid particles suspended in the atmosphere? Known as "aerosols" these tiny particles are important because some of them cool Earth's climate, and some of them impair human health. Read more ...
Up In The Air
Date: 12 January 2005An interview in the Illinois Wesleyan Magazine with Richard Cebula, manager of the NASA-contracted team responsible for OMI's data processing system, and member of the U.S. OMI Science Team. Read more ...
2004
Satellietwaarnemingen van luchtvervuiling
Date: 31 December 2004Het is medio oktober als de relatieve rust in de afdeling Atmosferische Samenstelling van het KNMI abrupt verstoord wordt. Gedurende bijna een week staat het onderzoek even stil. Onderzoekers rennen van de microfoon van Radio-1 naar de telefoon waar de schrijvende pers uiteenlopend van NRC Handelsblad tot en met de Apeldoornse Courant aan de lijn hangt. Ook het NOS- en RTL-journaal komen polshoogte nemen. Zelfs de grote oliemaatschappijen tonen veel belangstelling. Wat is er aan de hand? Is de ozonlaag ineens verdwenen? Zijn er oorzaken van plotselinge klimaatverandering vastgesteld? Lees meer ...
NASA Eyes Effects of a Giant 'Brown Cloud' Worldwide
Date: 15 December 2004NASA scientists recently announced that a giant, smoggy atmospheric "brown cloud" that forms over South Asia and Indian Ocean has intercontinental reach, and has effects around the world.
Scientists studied the intercontinental smog or ozone processes associated with the "brown cloud" using a new NASA technique to combine data acquired by satellites with ozone data measured by instruments on special weather balloons. The brown cloud is a persistent, but moving, air mass characterized by a mixed-particle haze, typically brown in color. It also contains other pollution, such as ozone. Read more ...
NASA's Aura Satellite Sheds New Light on Air Quality and Ozone Hole
Date: 14 December 2004Launched in July of 2004, the EOS-Aura satellite research platform is already providing the first-ever daily, direct global measurements of low altitude or tropospheric ozone and many other pollutants that affect our air quality. Moreover, Aura delivers its results with unprecedented clarity over a region. The instruments onboard will help scientists monitor pollution production and transport around the world.
Measurements taken from the satellite also offer the potential for new insights into how climate changes influence the recovery of the stratospheric or upper ozone layer, the protective region that shields the Earth from ultra-violet radiation. Read more ...
Eerste OMI resultaten laten grote dagelijkse variatie luchtvervuiling zien
Datum: 23 november 2004Dankzij satellieten is voor het eerst mogelijk om iedere dag de luchtvervuiling in Nederland en de rest van de wereld te zien tot op stadsniveau. Het blijkt dat in Nederland het verschil in luchtvervuiling van dag tot dag maar ook van plaats tot plaats sterk varieert. Dat zijn verrassende resultaten van het nieuwe satellietinstrument OMI, het Ozone Monitoring Instrument. Inmiddels stromen de eerste meetgegevens bij het KNMI in De Bilt binnen. Lees meer ...
Protecting our planet's ozone layer
Date: 3 October 2004Monitoring our planet's atmosphere has become an international priority. As successive world summits have stressed, our future on Earth could depend on safeguarding our environment. EuroNews 'Space' magazine reports today from the Royal Netherlands Meteorological Institute (KNMI) which is using instruments on several satellites to follow the evolution of ozone around the planet.
Read more ...
OMI met succes gelanceerd
Date: 15 juli 2004De Amerikaanse klimaatsatelliet AURA met aan boord het Nederlands-Finse Ozon Monitoring Instrument (OMI) is donderdagmiddag om 12.02 Nederlandse Tijd na een derde poging succesvol gelanceerd. Bij het KNMI, waar een kleine honderd genodigden de spannende lancering volgden, zijn daarna de champagneflessen ontkurkt.
Alle hobbels waar de lancering de vorige 2 dagen op bleef steken werden nu zonder problemen genomen en om 2 minuten over 12 vertrok de Delta II raket met NASA's EOS-Aura satelliet van de lanceerbasis Vandenberg Airforce Base in Californië. Lees meer ...
NASA Puts Safety First During Aura Launch
Date: 15 July 2004NASA engineers and mission officials decided during multiple launch attempts this week to postpone the launch of the Aura satellite to put safety first for mission success. Aura, a mission dedicated to the health of the Earth's atmosphere, launched successfully this morning at 6:01:59 EDT (3:01:59 PDT). Read more ...
Aura Launched, To Better Understand The Air We Breathe
Date: 15 July 2004Aura, a mission dedicated to the health of the Earth's atmosphere, was successfully launched today. This moment marks a tremendous achievement for the NASA family and our international partners. We look forward to the Aura satellite offering us historic insight into the tough issues of global air quality, ozone recovery and climate change, said NASA Associate Administrator for Earth Science Dr. Ghassem Asrar. Read more ...
NASA Launch Advisory: Aura Launch Postponed
Date: 14 July 2004The launch of NASA's Aura spacecraft atop a Boeing Delta II rocket was scrubbed this morning due to an issue with one of the two batteries on the second stage of the Delta II launch vehicle. At approximately three minutes before the scheduled liftoff time, as the batteries were being transferred to internal power, the battery current level dropped below prescribed limits, triggering a launch hold. Read more ...
Voortuitblik op OMI Lancering
Datum: 10 juni 2004Begin juli lanceert de NASA een technisch hoogstandje van Nederlands- Finse makelij: het 'Ozon Monitoring Instrument'. OMI is het eerste meetinstrument ter wereld dat in één dag de volledige atmosfeer zeer gedetailleerd in kaart brengt. Lees meer ...
NASA Plans to Put an Aura Around the Earth
Date: 3 June 2004Earth's atmosphere sustains life in all these ways, and by the thinnest margins. If a person could cruise at a speed of 60 miles an hour straight up, it would take just 6 minutes to exit the air we need to survive. Considering the relatively delicacy of this thin protective film, understanding our atmosphere goes hand in hand with protecting life as we know it.
On June 19, NASA will launch Aura, a next generation Earth-observing satellite that will make global observations of the ocean of air that surrounds our planet. Aura will supply the best information yet about the health of Earth's atmosphere. Read more ...