7/23/15, "Study Finds Abrupt Climate Change May Have Rocked the Cradle of Civilization," rsmas.miami.edu, press release
.....................
"New research reveals that some of the earliest civilizations in the
Middle East and the Fertile Crescent may have been affected by abrupt
climate change. These findings show that while socio-economic factors
were traditionally considered to shape ancient human societies in this
region, the influence of abrupt climate change should not be
underestimated.
.........
A team of international scientists led by researchers from the
University of Miami (UM) Rosenstiel School of Marine and Atmospheric
Science found that during the first half of the last interglacial
period known as the Holocene epoch, which began about 12,000 years ago
and continues today, the Middle East most likely experienced wetter
conditions in comparison with the last 6,000 years, when the conditions
were drier and dustier.
“Evidence for wet early Holocene was previously found in the Eastern Mediterranean Sea region, North and East African lakes and cave deposits from Southwest Asia, and attributed to higher solar insolation during this period,“ said Ali Pourmand, assistant professor of marine geosciences at the UM Rosenstiel School, who supervised the project. “Our study, however, is the first of its kind from the interior of West Asia and unique in its resolution and multi-proxy approach.”
The Fertile Crescent, a region in west Asia that extends from Iran and the Arabian Peninsula to the eastern Mediterranean Sea and northern Egypt is one of the most climatically dynamic regions in the world and is widely considered the birthplace of early human civilizations. “The high-resolution nature of this record afforded us the rare opportunity to examine the influence of abrupt climate change on early human societies. We see that transitions in several major civilizations across this region, as evidenced by the available historical and archeological records, coincided with episodes of high atmospheric dust; higher fluxes of dust are attributed to drier conditions across the region over the last 5,000 years,” said Arash Sharifi, Ph.D. candidate at the department of marine geosciences and the lead author of the study.
(Image caption): Climate variability during the past 5000 years as told by the concentration of titanium (Ti) in sediment core from Neor Lake, NW Iran. The vertical orange bands denote periods of dry and dusty condition, which correlate with historical records of drought and famine in Iranian Plateau, Mesopotamia and Eastern Mediterranean (brown and black horizontal bars respectively). Transition between ruling dynasties (gray arrows) in Iran and North Mesopotamia coincides with the episodes of dry and dusty condition in the region (peaks in Ti intensities). Credit: Arash Sharifi
The researchers investigated climate variability and changes in paleoenvironmental conditions during the last 13,000 years based on a high-resolution (sub-decadal to centennial) peat record from Neor Lake in Northwest Iran. Abrupt climate changes occur in the span of years to decades.
This study, which was funded by the National Science Foundation to A. Pourmand (EAR-1003639) and Elizabeth Canuel (EAR-1003529), is titled “Abrupt climate variability since the last deglaciation based on a high-resolution, multi-proxy peat record from NW Iran: The hand that rocked the Cradle of Civilization?” The paper, which will be published in the September 1 issue of the journal of Quaternary Science Review, is currently available online.
The study’s authors include: Arash Sharifi, Ali Pourmand, Larry C. Peterson, Peter K. Swart of the UM-RSMAS; Elizabeth A. Canuel, Erin Ferer-Tyler of the Virginia Institute of Marine Science, College of William and Mary; Bernhard Aichner, Sarah J. Feakins of the University of Southern California; Touraj Daryaee of the University of California, Irvine; Morteza Djamali of the institut méditerranéen de biodiversité et d'ecologie, France; Abdolmajid Naderi Beni, and Hamid A.K. Lahijani of the Iranian National Institute of Oceanography and Atmospheric Science, Iran."
.............................
===================
Sept. 2015 Quaternary Science Reviews:
- "Highlights
- •A high-resolution, multi-proxy record of climate variability from NW Iran is presented.
- •High dust fluxes observed during the last deglacial and mid-late Holocene.
- •Low dust fluxes during early Holocene coincide with higher water availability
- *Atmospheric teleconnection between North Atlantic climate and interior of West Asia.
- •High aeolian [wind] inputs correspond with drought and famine over the last 5000 years.
==============
................
................
7/23/15, Sciencedaily.com report: [Note scientists' original title referenced "climate variability" rather than "climate change:" "“Abrupt climate variability since the last deglaciation based on a high-resolution, multi-proxy peat record from NW Iran: The hand that rocked the Cradle of Civilization?” (Paragraph 9)]
7/23/15, "Abrupt climate change may have rocked the cradle of civilization," sciencedaily.com
"Effects of climate on human societies"
- "Summary: New research reveals that some of the earliest
civilizations in the Middle East and the Fertile Crescent
may have been affected by abrupt climate change. These findings show that while socio-economic factors were traditionally considered to shape ancient human societies in this region, the influence of abrupt climate change should not be underestimated.
A team of international scientists led by researchers from the
University of Miami (UM) Rosenstiel School of Marine and Atmospheric
Science found that during the first half of the last interglacial period
known as the Holocene epoch, which began about 12,000 years ago and
continues today, the Middle East most likely experienced wetter
conditions in comparison with the last 6,000 years, when the conditions
were drier and dustier.
"Evidence for wet early Holocene was previously found in the Eastern Mediterranean Sea region, North and East African lakes and cave deposits from Southwest Asia, and attributed to higher solar insolation [sunlight] during this period," said Ali Pourmand, assistant professor of marine geosciences at the UM Rosenstiel School, who supervised the project. "Our study, however, is the first of its kind from the interior of West Asia and unique in its resolution and multi-proxy approach."
The Fertile Crescent, a region in west Asia that extends from Iran and the Arabian Peninsula to the eastern Mediterranean Sea and northern Egypt is one of the most climatically dynamic regions in the world and is widely considered the birthplace of early human civilizations.
"The high-resolution nature of this record afforded us the rare opportunity to examine the influence of abrupt climate change on early human societies. We see that transitions in several major civilizations across this region, as evidenced by the available historical and archeological records, coincided with episodes of high atmospheric dust; higher fluxes of dust are attributed to drier conditions across the region over the last 5,000 years," said Arash Sharifi, Ph.D. candidate
at the department of marine geosciences and the lead author of the
study."Evidence for wet early Holocene was previously found in the Eastern Mediterranean Sea region, North and East African lakes and cave deposits from Southwest Asia, and attributed to higher solar insolation [sunlight] during this period," said Ali Pourmand, assistant professor of marine geosciences at the UM Rosenstiel School, who supervised the project. "Our study, however, is the first of its kind from the interior of West Asia and unique in its resolution and multi-proxy approach."
The Fertile Crescent, a region in west Asia that extends from Iran and the Arabian Peninsula to the eastern Mediterranean Sea and northern Egypt is one of the most climatically dynamic regions in the world and is widely considered the birthplace of early human civilizations.
"The high-resolution nature of this record afforded us the rare opportunity to examine the influence of abrupt climate change on early human societies. We see that transitions in several major civilizations across this region, as evidenced by the available historical and archeological records, coincided with episodes of high atmospheric dust; higher fluxes of dust are attributed to drier conditions across the region over the last 5,000 years," said Arash Sharifi, Ph.D. candidate
The researchers investigated climate variability and changes in paleoenvironmental conditions during the last 13,000 years based on a high-resolution (sub-decadal to centennial) peat record from Neor Lake in Northwest Iran. Abrupt climate changes occur in the span of years to decades."
Story Source:
The above post is reprinted from materials provided by University of Miami Rosenstiel School of Marine and Atmospheric Science. Note: Materials may be edited for content and length.
...................
The above post is reprinted from materials provided by University of Miami Rosenstiel School of Marine and Atmospheric Science. Note: Materials may be edited for content and length.
...................
Journal Reference:
Arash Sharifi, Ali Pourmand, Elizabeth A. Canuel, Erin Ferer-Tyler, Larry C. Peterson, Bernhard Aichner, Sarah J. Feakins, Touraj Daryaee, Morteza Djamali, Abdolmajid Naderi Beni, Hamid A.K. Lahijani, Peter K. Swart. Abrupt climate variability since the last deglaciation based on a high-resolution, multi-proxy peat record from NW Iran: The hand that rocked the Cradle of Civilization? Quaternary Science Reviews, 2015; 123: 215 DOI: 10.1016/j.quascirev.2015.07.006
===================
...........................
No comments:
Post a Comment