Respuesta :
Observed changes are frequency of extreme events like drought, rising in temperature and ocean level, reduction of snow, storms in tropical regions etc.
Observed changes over the twentieth century include increases in temperature global air and ocean, rising global sea levels, long-term sustained widespread reduction of ice cover and snow and changes in atmospheric circulation and ocean circulation. And also regional weather patterns, which influence seasonal rainfall conditions. Frequency of extreme events are Increasing. Droughts are longer and more extreme around the world. Temperatures are increasing world-wide due to greenhouse gases trapping more heat in the atmosphere. Storms in tropical regions becoming more severe due to warmer ocean water temperatures.
To learn more about climate change visit the link- https://brainly.com/question/1789619
#SPJ4
