GGRB28H3 Lecture 4: Lecture notes for lecture 4 of the course WITH slides that she skipped in lecture (but covered following lec)

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whiteotter147

13 Jun 2011

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Video 1 bill davenhall, your health depends on where you live. genetics + lifestyle + environment = health. Food, water quality not considered when doctors inquire about your health and health history. Geography is destiny in medicine. jack lord. patterns of health inequality: international, regional and class divides (spatial, social, ethnic, small scale variations. explaining inequalities in health outcomes: determinants of health. whitehall ii: 10,000 men and wo men employed in the british civil service, 1985 to present, results: social gradient still exists for many diseases; social class. different arguments arguing the inequalities of health. social and community influences: the more friends/community groups you are involved in, the better your health. working conditions and local environments: low social class working environments tend to have more hazards, local environments: living close to highly polluted areas, highly industrial areas, the neighbourhood you live in are all important to your health.

Related Questions

Tiny solid and liquid particles suspended in the atmosphere are called aerosols. Windblown dust, sea salts, volcanic ash, smoke from wildfires, and pollution from factories are all examples of aerosols. Depending upon their size, type, and location, aerosols can either cool the surface, or warm it. They can help clouds to form, or they can inhibit cloud formation. And if inhaled, some aerosols can be harmful to people's health.

These maps show average monthly aerosol amounts around the world based on observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite. Satellite measurements of aerosols, called aerosol optical thickness, are based on the fact that the particles change the way the atmosphere reflects and absorbs visible and infrared light. An optical thickness of less than 0.1 (palest yellow) indicates a crystal clear sky with maximum visibility, whereas a value of 1 (reddish brown) indicates very hazy conditions.

High aerosol amounts are linked to different process in different places and times of year. High aerosol amounts occur over South America from July through September. This pattern is due to land clearing and agricultural fires that are widespread across the Amazon Basin and Cerrado regions during the dry season. Aerosols have a similar seasonal pattern in Central America (March-May), central and southern Africa (June-September, and Southeast Asia (January-April).

In other cases, however, aerosol concentrations are not related to fires. For example, from May through August each year, aerosol amounts rise dramatically around the Arabian Peninsula and nearby oceans due to dust storms. Elevated aerosol amounts nestle at the foothills of the Himalaya Mountains in northern India in some months, and linger over eastern China for much of the year. These elevated aerosol amounts are due to human-produced air pollution.

What is the most likely source of the high concentration of particulates that appear off the coast of northwestern Africa?

What is the most likely source of the high concentrations of particulates over central Africa and central South America?

What is the most likely source of the high concentrations of particulates over eastern China?

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GGRB28H3 Lecture 4: Lecture notes for lecture 4 of the course WITH slides that she skipped in lecture (but covered following lec)

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