Arctic Sea Ice : Forum

AGW in general => Consequences => Topic started by: Pmt111500 on April 06, 2013, 08:05:12 AM

Title: ITCZ (InterTropical Convergence Zone) to move
Post by: Pmt111500 on April 06, 2013, 08:05:12 AM
A new study that makes sense to me at least:
http://www.sciencedaily.com/releases/2013/04/130402162559.htm (http://www.sciencedaily.com/releases/2013/04/130402162559.htm)
As the temperature gradient on the NH gets smaller due the arctic sea ice loss the study predicts northward movement of the ITCZ. This would likely mean a slight adjustment also in the location and effects of el Ninos/Ninas in my view. Also the southern parts of Sahara might get wetter. But I guess this brings no relief to the Australian drought. The news item is made from a press release so we'll have to wait a bit to read the study itself.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: icebgone on April 07, 2013, 01:27:51 AM
I will be reading that study.  Movement of the ITCZ has implications planet wide, especially in the location of the Hadley/Ferrell cells and location of the trade wind belts.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: Steve Bloom on April 11, 2013, 03:22:02 AM
Paper pdf:  https://dl.dropboxusercontent.com/u/647140/ITA_01.19.2013.pdf

Note especially per first paragraph of section 5 that the Hadley cell/ITCZ changes are already happening.  This new study projects them into the future.

This is a fundamental change in circulation, and a very big deal.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: Pmt111500 on April 11, 2013, 06:06:18 AM
Thanks for the paper Steve Bloom, how did you find a copy? Did you ask for it from the scientists?
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: Steve Bloom on April 11, 2013, 08:54:34 AM
Generally I'll do a quick search before asking.  This one was on the web site of the lead author.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: John Batteen on April 11, 2013, 11:52:25 PM
Very interesting paper, thanks.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: Ravenken on July 26, 2017, 07:46:25 PM
Paper pdf:  https://dl.dropboxusercontent.com/u/647140/ITA_01.19.2013.pdf

Note especially per first paragraph of section 5 that the Hadley cell/ITCZ changes are already happening.  This new study projects them into the future.

This is a fundamental change in circulation, and a very big deal.

Since this is now in full swing... do you still have a copy of that report? That link is dead now.
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: Qce on August 01, 2017, 06:55:23 PM
Quote
Since this is now in full swing... do you still have a copy of that report? That link is dead now.
It's here:http://dust.ess.uci.edu/ppr/ppr_FrH13.pdf (http://dust.ess.uci.edu/ppr/ppr_FrH13.pdf)

An easy way to find a pdf for a paper (if it's available at all) is to google the title adding "filetype:pdf" at the end

For this paper you'd enter:
Interhemispheric Temperature Asymmetry over the Twentieth Century and in Future Projections filetype:pdf
Title: Re: ITCZ (InterTropical Convergence Zone) to move
Post by: rboyd on August 01, 2017, 09:49:12 PM
Seems that the ITCZ will also narrow as the climate warms, as well as moving northwards. Together with the expansion of the Hadley cells, there will be a lot of extreme changes to local climates.

Narrowing of the ITCZ in a warming climate: Physical mechanisms

https://climatedynamics.ethz.ch/people/mike/byrne_schneider_2016b.pdf (https://climatedynamics.ethz.ch/people/mike/byrne_schneider_2016b.pdf)

If the ice melt from Greenland greatly intensifies though, we could get an AMOC shutdown that would lead to a cooling northern hemisphere and a warming southern hemisphere. Paleoclimatology shows that this happened before, and the ITCZ moved south with the thermal equator in response.

Study Tracks an Abrupt Climate Shift as Ice Age Glaciers Began to Retreat

http://www.ldeo.columbia.edu/news-events/study-tracks-abrupt-climate-shift-ice-age-glaciers-began-retreat (http://www.ldeo.columbia.edu/news-events/study-tracks-abrupt-climate-shift-ice-age-glaciers-began-retreat)