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May 30, 2022 · 'Particulate matter,' also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets. Particle pollution is made up of a number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or dust particles. The size of particles is directly linked to their potential for causing health problems. EPA is concerned about particles that are 10 micrometers in diameter or smaller because those are the particles ...
Feb 14, 2024 · A Black Cloud Over Cairo. The Earth Observing System Data and Information System is a key core capability in NASA’s Earth Science Data Systems Program. It provides end-to-end capabilities for managing NASA’s Earth science data from various sources—satellites, aircraft, field measurements, and various other programs.
May 30, 2024 · Particulate Matter Concentrations. Find Data. Concentrations of tiny airborne pieces of solid or liquid matter such as soot, dust, fumes, mists, aerosols, haze, and smoke.¹ The size of particles is directly linked to their potential for causing health problems. Small particles less than 10 micrometers in diameter pose the greatest risk because ...
May 16, 2024 · On November 6, 2023, air pollution in Delhi, India, hit an all-time high and then went off the charts. On that day, Delhi's air quality index (AQI) surpassed 500, the scale's maximum level. The pollution sent overwhelming numbers of children to local emergency departments with breathing problems and Delhi officials closed their schools.
Jul 26, 2023 · Air Quality Data Pathfinder. Poor air quality is one of the largest global environmental and health threats. Instruments aboard NASA satellite and airborne platforms continually acquire data about these pollutants. This Data Pathfinder is designed to help guide you through the process of selecting and using datasets applicable to air quality ...
Jun 24, 2024 · AOD is a unitless measure. From an observer on the ground, an AOD of less than 0.1 is characteristic of a clear sky, bright Sun, and maximum visibility. As AOD increases to 0.5, 1.0, and greater than 3.0, aerosols become so dense that the Sun is obscured. Commonly Used Aerosol Optical Depth (AOD) Data at a Glance.
Properties of aerosol particles including: compositon, size, diameter.
Sep 22, 2011 · In the fall, frequent temperature inversions settle over Cairo—a weather phenomenon that occurs when a warmer, lighter air mass moves over a colder, denser air mass, trapping a layer of air close to the ground. The inversions still the winds, creating a stagnant soup of unmoving air. Meanwhile, an extremely dry climate means that cleansing ...
Aug 29, 2024 · Solid materials suspended in the atmosphere in the form of small, irregular particles, many of which are microscopic in size. Dust and Ash are due to biogenic and anthropogenic sources such as volcanic eruptions, salt spray, plant pollen, smoke, industrial processes, etc. Definition Source: Huschke, R.E., ed. 1959. Glossary of Meteorology, American Meteorological Society, Boston, MA
Aug 16, 2024 · Minnie Wong. Aug 16, 2024. NASA Worldview has expanded its suite of satellite-based remote sensing measurements of aerosol optical depth (AOD) and Angstrom parameter to include four new layers of ground-based measurements from the global Aerosol Robotic Network (AERONET) program. Users can now quickly and easily compare ground based ...
