Dimming the Sun video

Dr David Travis found that aircraft contrails
a. increased nighttime temperatures and decreased daytime temperatures
b. increased nighttime temperatures and increased daytime temperatures
c. decreased nighttime temperatures and decreased daytime temperatures
d. decreased nighttime temperatures and increased daytime temperatures
Pan evaporation rates increase as (circle best choice for each)
sunlight (increases or decreases)
dew point (increases or decreases)
air temperature (increases or decreases)
wind speed (increases or decreases)
Jerry Stanhill noticed that solar energy reaching the group in Israel
a. Dropped significantly over the past 40 years
b. Increased significantly over the past 40 years
c. Dropped significantly over the past 100 years
d. Increased significantly over the past 100 years
Beate Liepert looks at solar radiation measurements from around the world and found that in most places
a. The amount of sunlight reaching the top of the atmosphere decreased.
b. The amount of sunlight reaching the ground decreased.
c. The amount of sunlight reaching the top of the atmosphere increased.
d. The amount of sunlight reaching the ground increased.
 

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Over the past 40 years pan evaporation rates have ________________.
a. increased
b. decreased
c. remained about the same
   
Pan evaporation rates have been used by scientists to infer the amount of sunlight
a. reflected back into space
b. absorbed by clouds
c. reaching the ground
d. given off by the sun.
Dr. Ramanathan helped lead the INDOEX experiment in the Maldives Island to better understand.
a. how clouds reflect sunlight
b. the difference in clouds in polluted environments to cloud in pristene environments
c. how clouds influence the greenhouse effect
d. the difference in cloud abunances
Dr. Ramanathan found that tropospheric aerosols make cloud drops
a. smaller and hence more reflective
b. smaller and hence less reflective
c. larger and hence more reflective
d. larger and hence less reflective
Bruning fossil fuels for energy
a. adds greenhouse gases but not particulate matter (aerosols) to the atmosphere.
b. adds greenhouse gases and particulate matter (aerosols) to the atmosphere.
c. removes greenhouse gases and particulate matter (aerosols) from the atmosphere.
d. removes greenhouse gases but not particulate matter (aerosols) from the atmosphere.
Most scientists believe that increasing levels of greenhouse gases causes Earth's surface temperature
to _____________ while increasing levels of atmospheric aerosols causes Earth's surface temperature to
_____________.
a. warm, warm
b. warm , cool
c. cool, warm
d. cool, cool
 
  click to enlarge
One possible cause of the severe drought over the Sahel during the 1980s and early 1990s was.
a. increased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) amplifying the seasonal monsoon pattern.
b. decreased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) amplifying the seasonal monsoon pattern.
c. decreased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) suppressing the seasonal monsoon pattern.
d. increased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) suppressing the seasonal monsoon pattern.
 
   



 

 

 

Answers

Dr David Travis found that aircraft contrails
a. increased nighttime temperatures and decreased daytime temperatures
b. increased nighttime temperatures and increased daytime temperatures
c. decreased nighttime temperatures and decreased daytime temperatures
d. decreased nighttime temperatures and increased daytime temperatures

Pan evaporation rates increase as (circle best choice for each)
sunlight (increases or decreases)
dew point (increases or decreases)
air temperature (increases or decreases)
wind speed (increases or decreases)

Jerry Stanhill noticed that solar energy reaching the group in Israel
a. Dropped significantly over the past 40 years
b. Increased significantly over the past 40 years
c. Dropped significantly over the past 100 years
d. Increased significantly over the past 100 years


Over the past 40 years pan evaporation rates have ________________.
a. increased
b. decreased
c. remained about the same

Pan evaporation rates have been used by scientists to infer the amount of sunlight
a. reflected back into space
b. absorbed by clouds
c. reaching the ground
d. given off by the sun.

Dr. Ramanathan helped lead the INDOEX experiment in the Maldives Island to better understand.
a. how clouds reflect sunlight
b. the difference in clouds in polluted environments to cloud in pristine environments
c. how clouds influence the greenhouse effect
d. the difference in cloud abunances

Dr. Ramanathan found that tropospheric aerosols make cloud drops
a. smaller and hence more reflective
b. smaller and hence less reflective
c. larger and hence more reflective
d. larger and hence less reflective
 

Burning fossil fuels for energy
a. adds greenhouse gases but not particulate matter (aerosols) to the atmosphere.
b. adds greenhouse gases and particulate matter (aerosols) to the atmosphere.
c. removes greenhouse gases and particulate matter (aerosols) from the atmosphere.
d. removes greenhouse gases but not particulate matter (aerosols) from the atmosphere.

Most scientists believe that increasing levels of greenhouse gases causes Earth's surface temperature
to _____________ while increasing levels of atmospheric aerosols causes Earth's surface temperature to
_____________.
a. warm, warm
b. warm , cool
c. cool, warm
d. cool, cool


One possible cause of the severe drought over the Sahel during the 1980s and early 1990s was.
a. increased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) amplifying the seasonal monsoon pattern.
b. decreased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) amplifying the seasonal monsoon pattern.
c. decreased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) suppressing the seasonal monsoon pattern.
d. increased sunlight over the Guinea Basin (just South of Ivory Coast and Ghana) suppressing the seasonal monsoon pattern.