A huge body of air that has similar temperature, humidity, and air. pressure at any given height is called an. air mass. Scientists classify air. masses according to temperature and humidity. Four major types of air. masses inï¬uence the weather in North America: maritime tropical, continental tropical, maritime polar, and continental polar. Tropical, or. warm, air masses form in the tropics and have low air pressure.
It employed 28,490 RNs in May 2013 (as per the BLS). At that time, employment per 1,000 jobs for these professionals was 17.366. According to the survey of the Bureau of Labor Statistics, the average annual and per hour registered nurse salary in Oregon was $80,440 and $38.67, respectively, in May 2013.
The median RN salary here was $65,270. Not counting the areas of the state that border Massachusetts, Manchester is the highest paying metropolitan area. The lowest RN salary can be found in the Rochester-Dover area of New Hampshire and Maine. The average RN salary in this area was $61,990 in 2013. This area employed about 850 registered nurses. Those with salaries in the 75th percentile made $81,890, while those with salaries in the 25th percentile earned $48,390 or less. Ten percent of the RNs in this state made $38,490 or less in 2013.