Question and answer
How much CO¬2 in the atmosphere gives us a comfortable temperature? How much is in the atmosphere currently?
Carbon dioxide in earth's atmosphere is considered a trace gas currently occurring at an average concentration of about 390 parts per million by volume or 591 parts per million by mass.[33] The total mass of atmospheric carbon dioxide is 3.16×1015 [ kg (about 3,000 gigatonnes). Its concentration varies seasonally (see graph at right) and also considerably on a regional basis, especially near the
ground. In urban areas concentrations are generally higher and indoors they can reach 10 times background levels. Carbon dioxide is a greenhouse gas. Yearly increase of atmospheric CO2: In the 1960s, the average annual increase was 37% of the 2000–2007 average.[34] Five hundred million years ago carbon dioxide was 20 times more prevalent than today, decreasing to 4–5 times during the Jurassic period and then slowly declining with a particularly swift reduction occurring 49 million years ago.[35][36] Human activities such as the combustion of fossil fuels and deforestation have caused the atmospheric concentration of carbon dioxide to increase by about 35% since the beginning of the age of industrialization.[37] Up to 40% of the gas emitted by some volcanoes during subaerial eruptions is carbon dioxide.[38] It is estimated that volcanoes release about 130–230 million tonnes (145–255 million tons) of CO2 into the atmosphere each year. Carbon dioxide is also produced by hot springs such as those at the Bossoleto site near Rapolano Terme in Tuscany, Italy. Here, in a bowl-shaped depression of about 100 m diameter, local concentrations of CO2 rise to above 75% overnight, sufficient to kill insects and small animals, but it warms rapidly when sunlit and the gas is dispersed by convection during the day.[39] Locally high concentrations of CO2, produced by disturbance of deep lake water saturated with CO2 are thought to have caused 37 fatalities at Lake Monoun, Cameroon in 1984 and 1700 casualties at Lake Nyos, Cameroon in 1986.[40] Emissions of CO2 by human activities are currently more than 130 times greater than the quantity emitted by volcanoes, amounting to about 27 billion tonnes per year.[41] ]
Expert answered|dokidoki|Points 361|
Question
Asked 12/28/2011 12:16:31 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
thos site is pissing me off it keeps acting up it ands making me mad also nobody can help me with my question and its making me mad to!
Weegy: I am sorry you have had problems. Please give me your question and I will do my best to answer it for you. (More)
Question
Expert Answered
Asked 12/28/2011 2:36:01 PM
0 Answers/Comments
25,358,396 questions answered
Popular Conversations
A geocentric system is ...
Weegy: A geocentric system is Earth-centered. User: In the past, astronomical observations were an important part of ...
5/29/2016 1:57:09 PM| 3 Answers
What is sfumato?
5/28/2016 9:44:10 AM| 2 Answers
The main purpose of a budget is to
5/28/2016 9:20:36 PM| 2 Answers
An acceptance is complete and effective only when it has been- - ...
Weegy: An acceptance is complete and effective only when it has been communicated to the offerer.
5/28/2016 11:54:15 PM| 2 Answers
coercive
Weegy: The Coercive Acts were meant to reverse the trend of colonial resistance but actually provoked higher levels of ...
5/29/2016 3:19:03 AM| 2 Answers
Which of the following statements does NOT describe how teens can ...
Weegy: In order to gain the maximum benefits from an exercise program, you should include both cardiovascular training ...
5/29/2016 9:17:54 AM| 2 Answers
The wicked witch and the big bad wolf are examples of A. ...
Weegy: A. Dynamic Characters, characters you know and love from fictional stories. User: If an author wanted to ...
5/29/2016 11:33:48 AM| 2 Answers
Simplify -7 + [5 + (-12)÷3] -6 -34/3 -8
5/28/2016 1:03:54 AM| 1 Answers
Weegy Stuff
S
Points 713 [Total 713] Ratings 10 Comments 593 Invitations 2 Offline
S
Points 699 [Total 699] Ratings 13 Comments 569 Invitations 0 Offline
S
Points 643 [Total 643] Ratings 0 Comments 643 Invitations 0 Offline
S
1
L
L
P
R
P
L
P
P
R
Points 295 [Total 12547] Ratings 2 Comments 275 Invitations 0 Offline
S
L
P
P
P
Points 166 [Total 3543] Ratings 0 Comments 166 Invitations 0 Offline
S
Points 38 [Total 107] Ratings 0 Comments 38 Invitations 0 Offline
S
Points 12 [Total 12] Ratings 1 Comments 2 Invitations 0 Offline
S
Points 10 [Total 10] Ratings 1 Comments 0 Invitations 0 Offline
S
L
Points 7 [Total 4099] Ratings 0 Comments 7 Invitations 0 Offline
S
Points 6 [Total 6] Ratings 0 Comments 6 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.