Featured Research

from universities, journals, and other organizations

Mid-Pliocene Asian Monsoon Intensification And The Onset Of Northern Hemisphere Glaciation

Date:
July 2, 2009
Source:
Geological Society of America
Summary:
The late Pliocene onset of major Northern Hemisphere glaciation is one of the most important steps in the Cenozoic global cooling. Although most attempts have been focused on high-latitude climate feedbacks, no consensus has been reached in explaining the forcing mechanism of this dramatic climate change.

The late Pliocene onset of major Northern Hemisphere glaciation (NHG) is one of the most important steps in the Cenozoic global cooling. Although most attempts have been focused on high-latitude climate feedbacks, no consensus has been reached in explaining the forcing mechanism of this dramatic climate change.

In a new study published in the journal Geology, Zhang et al. present a key low-latitude climate record, the high-resolution Asian monsoon precipitation variability for the past five million years, reconstructed from South China Sea sediments. Their results, with supporting evidence from other records, indicate significant mid-Pliocene Asian monsoon intensification, preceding the initiation of NHG at about 2.7 million years ago. The correlation between the monsoon record and marine calcium isotopes indicates that the 1.4-million-year-long monsoon intensification probably enhanced Asian continental erosion and chemical weathering.

Elevated chemical weathering and organic carbon burial probably lowered the contemporary atmospheric CO2, and the CO2 drop may have triggered the NHG onset as suggested by a recent study. As opposed to previous studies, here Zhang et al. propose a low-latitude-driven NHG glaciation scenario.


Story Source:

The above story is based on materials provided by Geological Society of America. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yi Ge Zhang, Junfeng Ji, William Balsam, Lianwen Liu, and Jun Chen. Mid-Pliocene Asian monsoon intensification and the onset of Northern Hemisphere glaciation. Geology, 2009; DOI: 10.1130/G25670A.1

Cite This Page:

Geological Society of America. "Mid-Pliocene Asian Monsoon Intensification And The Onset Of Northern Hemisphere Glaciation." ScienceDaily. ScienceDaily, 2 July 2009. <www.sciencedaily.com/releases/2009/06/090630203041.htm>.
Geological Society of America. (2009, July 2). Mid-Pliocene Asian Monsoon Intensification And The Onset Of Northern Hemisphere Glaciation. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/2009/06/090630203041.htm
Geological Society of America. "Mid-Pliocene Asian Monsoon Intensification And The Onset Of Northern Hemisphere Glaciation." ScienceDaily. www.sciencedaily.com/releases/2009/06/090630203041.htm (accessed September 22, 2014).

Share This



More Earth & Climate News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Will Climate Rallies Spur Change?

Will Climate Rallies Spur Change?

Newsy (Sep. 21, 2014) Organizers of the People's Climate March and other rallies taking place in 166 countries hope to move U.N. officials to action ahead of their summit. Video provided by Newsy
Powered by NewsLook.com
Thousands March in NYC Over Climate Change

Thousands March in NYC Over Climate Change

AP (Sep. 21, 2014) Accompanied by drumbeats, wearing costumes and carrying signs, thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (Sept. 21) Video provided by AP
Powered by NewsLook.com
Climate Change Rally Held in India Ahead of UN Summit

Climate Change Rally Held in India Ahead of UN Summit

AFP (Sep. 20, 2014) Some 125 world leaders are expected to commit to action on climate change at a UN summit Tuesday called to inject momentum in struggling efforts to tackle global warming. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins