Daily OMI tropospheric NO2 (air pollution) measurements over The Netherlands and Western Europe
Today's satellite air quality measurements are available around 15:00 hours GMT for Europe. OMI (on the EOS-Aura satellite) passes over Europe around 12:45 hours (GMT) and it takes another 2-2.5 hours before the data are available here. The most recent air quality measurements can be viewed in Google Earth. The TEMIS web site contains a limited archive of air quality and air pollution Google Earth files.
Daily OMI tropospheric NO2 (air pollution) measurements over other regions in the world
Also available on the TEMIS web site.
Archive OMI news
Eruption of Mount Nyamulagira (Nyamuragira) (incl. animations)Date: 08 12 2006
On November 27, 2006, Mount Nyamulagira erupted. Situated near the city of Goma in the eastern Democratic Republic of Congo (DRC), the volcano posed a danger to nearby wildlife as the animals could fall ill after eating ash-coated vegetation. Although the full impact of the eruption was not immediately known, the city of Goma appeared safe from any resulting lava flow as another volcano, Mount Nyiragongo, would block the lava, according to the Associated Press.
Besides ash and possible lava, the volcano also released sulfur dioxide. OMI tracked the emission of this gas from the volcano from November 28 to December 4, 2006.Read more ...
Ozone Hole Reaches Record SizeDate: 21 10 2006
The 2006 ozone hole over the polar region of the Southern Hemisphere broke records for both area and depth. A little over a week after the ozone hole sustained its new record high for average area, satellites and balloon-based instruments recorded the lowest concentrations of ozone ever observed over Antarctica, making the ozone hole the deepest it had ever been.
This image, made from data collected by the Ozone Monitoring Instrument on NASA’s Aura satellite, shows the Antarctic ozone hole on September 24, 2006.Read more ...
Sulfur Dioxide Cloud from Rabaul VolcanoDate: 12 10 2006
On October 7, 2006, Rabaul Volcano on the northeastern tip of New Britain produced a large-scale eruption. According to ReliefWeb, the eruption shook windows and rained heavy ash and small stones on the city of Rabaul as authorities declared a state of emergency. Besides volcanic ash and steam, the eruption produced sulfur dioxide. Densely concentrated over the island of New Britain the day of the eruption, the sulfur dioxide dispersed over the next two days.Read more ...
Ozongat groter dan ooit gemetenDate: 04 10 2006
Het 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 meer ...
Tungurahua Volcano in EcuadorDate: 17 08 2006
The Tungurahua Volcano in Ecuador had been acting up for more than a month when it erupted ferociously in mid-August 2006. According to the Associated Press, the volcano destroyed 10 villages, and buried the homes of roughly 5000 people—as well as the pasture for their livestock—under tons of ash. Besides inundating the locals, Tungurahua Volcano spewed volcanic ash into the atmosphere. OMI measured the aerosols in the region the day after the volcano’s fierce eruption.Read more ...
UK Record Heatwave and Rising Pollution Observed by Eyes in the SkyDate: 25 07 2006
As 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
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 ...
Live OMI measurements of total Ozone and UV radiation on the Earth's surfaceDate: 25 07 2006
The 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 ...
OMI Measures Volcanic Gas Cloud (quicktime movie 3,2 Mb)Date: 13 07 2006
On 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. See also (shorter but with Calipso measurements of same event). Read more ...
Satellietmissie Luchtkwaliteit en Klimaat geselecteerd door ESADate: 07 07 2006
De 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 ...
ANTARCTIC OZONE HOLE TO RECOVER LATER THAN EXPECTEDDate: 30 06 2006
Scientists 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 ...
First global tropospheric maps show streams of tropospheric ozone crossing the oceansDate: 28 06 2006
The 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 ...
SO2 Emissions from SmeltersDate: 28 06 2006
The 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 ...
Asian Dust Storms (movie)Date: 15 04 2006
Asia 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 ChinaDate: 15 03 2006
A 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 ...
Smoke over Southern United StatesDate: 12 03 2006
A thick cloud of aerosols hung over part of North America on 12 March 2006. Aerosols, tiny particles suspended in the atmosphere, can result from a variety of sources, including dust storms, pollution, and smoke. This aerosol cloud, extending from northern Mexico through Kansas, likely resulted in a large part from fires in Texas and Oklahoma. Windy conditions that helped spread some wildfires might also have lofted dust particles into the air.Read more ...