U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Weather
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
View Poll Results: Man made or Natural?
Man 3 21.43%
Natural 10 71.43%
Not sure 1 7.14%
Voters: 14. You may not vote on this poll

Reply Start New Thread
 
Old 11-02-2012, 01:57 PM
 
244 posts, read 369,263 times
Reputation: 107

Advertisements

like the title says you think its natural or man made? If you say man made, can you tell me where the glaciers that use to cover the majority of the US went? I know there use to be a huge one right where new york is...
Rate this post positively Reply With Quote Quick reply to this message

 
Old 11-02-2012, 02:13 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

Over $104,000 in prizes has already been given out to active posters on our forum and additional contests are planned
 
Location: Western Massachusetts
46,079 posts, read 48,404,915 times
Reputation: 15081
Quote:
Originally Posted by Jim_Rockford View Post
like the title says you think its natural or man made? If you say man made, can you tell me where the glaciers that use to cover the majority of the US went? I know there use to be a huge one right where new york is...
Some climate change can be caused by man is not the same as saying all climate change must have been man made.


Last edited by nei; 11-02-2012 at 02:28 PM..
Rate this post positively Reply With Quote Quick reply to this message
 
Old 11-02-2012, 06:41 PM
 
Location: Portsmouth, UK
12,722 posts, read 7,895,422 times
Reputation: 3774
I'd say it's a natural cycle but perhaps is being speeded up by man...
Rate this post positively Reply With Quote Quick reply to this message
 
Old 11-02-2012, 08:46 PM
 
Location: Columbus, Ohio
1,709 posts, read 2,953,885 times
Reputation: 1213
Both
Rate this post positively Reply With Quote Quick reply to this message
 
Old 11-03-2012, 08:05 AM
 
Location: Laurentia
5,593 posts, read 7,317,249 times
Reputation: 2432
Almost all climate change historically has been natural. The recent warming has been caused by both natural and man-made factors, I believe in roughly equal proportion. Other factors besides CO2 are obviously driving the climate as well - one look at the CO2 chart compared to the temperature chart demonstrates that. If I had to pick one or the other I'd say natural, since even global warming has to stop in the face of the PDO cycle (just look at the 1970's...), and the historical nature of all climate changes before 1900 or so.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 11-03-2012, 08:28 AM
 
916 posts, read 1,780,082 times
Reputation: 990
A little bit of both.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 11-03-2012, 12:23 PM
 
Location: South Jersey
14,316 posts, read 8,419,110 times
Reputation: 5115
CO2 is a greenhouse gas, so there's no denying that greater concentrations of it in the atmosphere (which has resulted at least partly from anthropogenic emissions) will trap more heat. However, this says nothing of the magnitude of its global warming potential. Keep in mind it is a trace gas in the atmosphere. As far as I know, it has not been and cannot be empirically demonstrated how a certain magnitude of CO2 increase in the atmosphere will increase temperatures. So to say that global warming is partly anthropogenic and partly natural doesn't seem like it should be very controversial to me; the problem is, who knows just to what extend we may be to the blame. There are reasons a runaway greenhouse effect is plausible, such as warmer oceans holding less dissolved CO2; permafrost melting, leading to methane emissions; and reduced snow cover in winter, especially in the Northern Hemisphere, leading to massive warming locally due to lowered albedo; among others. But among the many positive feedback loops, there could be negative ones, as well as other unforeseen and unknown processes. Any way you look at it, how the earth responds to anthropogenic CO2 emissions is what makes all the difference, so in a way it is beyond our control and knowledge anyway. We cannot simply reduce CO2 emission and expect natural processes that we may have set in motion to just reverse themselves. And similarly, we shouldn't expect further emissions of CO2 to have the same effect as previous ones, as the global warming potential of CO2 decreases logarithmically with greater atmospheric concentrations, so that further emissions trap less heat than previous ones.
Rate this post positively Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Weather

All times are GMT -6. The time now is 07:56 AM.

© 2005-2022, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Contact Us - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 - Top