Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA’s Terra Satellite Tracks Global Pollution

19.05.2004


Data from NASA’s Terra satellite is adding to our understanding of how pollution spreads around the globe. The information will help scientists protect and understand the Earth.


Pollution Outflow from Spring 2003 Fires in Siberia

In the spring of 2003 there were large numbers of fires in Siberia, especially in the Baikal region. These were detected by the MODIS instrument on the Terra satellite (top). This graphic shows the number of fires detected during the month of May, 2003. These fires produced large amounts of fine carbon aerosol which spread out over the Pacific Ocean (center). The suspended particles, also detected by MODIS, only last for a few days. The MOPITT instrument on the Terra satellite measures carbon monoxide gas (CO). CO was also produced by the fires (bottom). This pollutant can last for over a month. The longer lifetime allows the gas to cross the Pacific Ocean and reduce air quality over North America before continuing on around the globe. Credit: David Edwards, NCAR



NASA funded scientists from the National Center for Atmospheric Research (NCAR), Boulder, Colo., will present two studies focusing on global air pollution. Their presentations are part of the 2004 Joint Assembly of the American and Canadian Geophysical Unions.

David Edwards will discuss "Observations of Carbon Monoxide and Aerosol from the Terra Satellite: Northern Hemisphere Variability," on Thursday at 8:45 a.m. EDT in room 520D of the Palais des Congrès, Montreal. Cathy Clerbaux will discuss, "Tracking of Pollution Plumes Using Measurements of Pollution in the Troposphere (MOPITT) Measurements," at 9:30 a.m. EDT.


Both studies used instruments on NASA’s Terra satellite to examine trends in global carbon monoxide (CO) and fine particulate (aerosol) pollution. Industry and vehicles in urban regions and fires produce these pollutants.

Terra and other NASA Earth observing satellites provide vital tools for monitoring global levels, sources and destinations of CO and other pollutants. The growing data record shows seasonal and annual variations, clues about how our planet may be changing. CO molecules can last from a few weeks to several months in the atmosphere, allowing them to travel long distances and impact air quality far from the point of emission.

Edwards, an NCAR researcher, used two sensors on NASA’s Terra to track CO and aerosols from smoke originating in Russia. The plumes were tracked as they spread across the Pacific Ocean, filling the Northern Hemisphere.

In late summer 2002 and spring 2003, Terra observed big fires in western Russia and Siberia. The fires led to a ’dirty’ 2002/03 winter atmosphere in the Northern Hemisphere with high amounts of CO and aerosol. Peak levels of CO hung over the United States.

By using two complementary instruments on Terra, Edwards was able to tell the difference between pollutants originating from wildfires and those from urban and industrial sources. The MOPITT instrument provided CO data, while the Moderate-resolution Imaging Spectroradiometer (MODIS) instrument recorded aerosol data.

"The satellite observations showed Russian fires have a huge impact on air quality on a global scale," Edwards said. "This work helps get the message across, that when it comes to pollution, we need to think globally," he added.

Work has started to see if the MOPITT instrument can track CO pollution originating from cities. Clerbaux, a scientist visiting NCAR from the French National Center for Scientific Research, points out tracking pollution from cities is very important, since half the people on Earth will live in urban centers by 2007.

Though MOPITT was not designed specifically to detect pollution plumes from cities, the results look promising. By selecting the data and averaging it over long time periods, the observations were made more reliable, and help distinguish the city emissions from other distant sources.

MOPITT data shows how wildfires in Kalimantan on Borneo Island in Indonesia, contaminated the air in 2002 above Jakarta, Indonesia. "The instrument also shows how pollution gets dispersed from cities," Clerbaux said. "Mexico City and Jakarta are both surrounded by mountains. Due to topography, Terra revealed pollution could only escape upward or through openings in the landscape. For example, like the area to the north for Mexico City," she added.

NASA’s Earth Science Enterprise is dedicated to understanding the Earth as an integrated system and applying Earth System Science to improve prediction of climate, weather, and natural hazards using the unique vantage point of space.

Gretchen Cook-Anderson | GSFC
Further information:
http://www.gsfc.nasa.gov/topstory/2004/0517mopitt.html

More articles from Ecology, The Environment and Conservation:

nachricht Waste in the water – New purification techniques for healthier aquatic ecosystems
24.07.2018 | Eberhard Karls Universität Tübingen

nachricht Plenty of habitat for bears in Europe
24.07.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

Im Focus: World record: Fastest 3-D tomographic images at BESSY II

The quality of materials often depends on the manufacturing process. In casting and welding, for example, the rate at which melts solidify and the resulting microstructure of the alloy is important. With metallic foams as well, it depends on exactly how the foaming process takes place. To understand these processes fully requires fast sensing capability. The fastest 3D tomographic images to date have now been achieved at the BESSY II X-ray source operated by the Helmholtz-Zentrum Berlin.

Dr. Francisco Garcia-Moreno and his team have designed a turntable that rotates ultra-stably about its axis at a constant rotational speed. This really depends...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

'Building up' stretchable electronics to be as multipurpose as your smartphone

14.08.2018 | Information Technology

During HIV infection, antibody can block B cells from fighting pathogens

14.08.2018 | Life Sciences

First study on physical properties of giant cancer cells may inform new treatments

14.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>