Estimate the average surface temperature of the earth when the sun was 40% dimmer, 4 billion years ago. your estimate does not include the effects of the greenhouse gases (carbon dioxide and water vapor). use a = 0.3 for the earth’s albedo. assuming that the actual temperature of our planet was the same in the past as it is today, compare the strength of the greenhouse effect today vs. its value 4 gy ago. how different would the earth’s atmosphere have been so as to achieve that level of dt?

City 24-hr average yearly temperature in ºc total yearly precipitation in mm minsk, belarus (former ussr) (53° n, 27° e) shanghai, china (31° n, 121° e) baltimore city, usa (39° n, 76° w) helsinki, finland (60° n, 24° e) banff, canada (51° n, 115° w) kuala lumpur, malaysia (3° n 101° e) 26.5 2393.6 buenos aires, argentina (34° s, 58° w) jakarta, indonesia (6° s, 106° e) questions 1. what factor contributes most to the warm climate of kuala lumpur? 2. banff and minsk are located at similar latitudes. what could account for banff’s average yearly temperature being lower than minsk’s? 3. which city’s climate is most similar to jakarta, baltimore or kuala lumpur? explain your answer. 4. shanghai and buenos aires have located thousands of miles apart and in different hemispheres, yet their climates are similar. what reasoning could explain this?

The earth is actually quite a dry planet true or false

How does sea floor spreading relate to supercontinents?