Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history
The Ptolemaic era (305–30 BCE) is an important period of Ancient Egyptian history known for its material and scientific advances, but also intermittent political and social unrest in the form of (sometimes widespread) revolts against the Ptolemaic elites. While the role of environmental pressures ha...
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ftcopernicus:oai:publications.copernicus.org:cp101839 2023-05-15T16:39:22+02:00 Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history Singh, Ram Tsigaridis, Kostas LeGrande, Allegra N. Ludlow, Francis Manning, Joseph G. 2023-01-27 application/pdf https://doi.org/10.5194/cp-19-249-2023 https://cp.copernicus.org/articles/19/249/2023/ eng eng doi:10.5194/cp-19-249-2023 https://cp.copernicus.org/articles/19/249/2023/ eISSN: 1814-9332 Text 2023 ftcopernicus https://doi.org/10.5194/cp-19-249-2023 2023-01-30T17:22:42Z The Ptolemaic era (305–30 BCE) is an important period of Ancient Egyptian history known for its material and scientific advances, but also intermittent political and social unrest in the form of (sometimes widespread) revolts against the Ptolemaic elites. While the role of environmental pressures has long been overlooked in this period of Egyptian history, ice-core-based volcanic histories have identified the period as experiencing multiple notable eruptions, and a repeated temporal association between explosive volcanism and revolt has recently been noted. Here we analyze the global and regional (Nile River basin) hydroclimatic response to a unique historical sequence of four large and closely timed volcanic eruptions (first a tropical one, followed by three extratropical northern hemispheric events) between 168 and 158 BCE, a particularly troubled period in Ptolemaic history for which we now provide a more detailed hydroclimatic context. The NASA (National Aeronautics and Space Administration) GISS (Goddard Institute for Space Studies) ModelE2.1 Earth system model simulates a strong radiative response with a radiative forcing (top of atmosphere) of −7.5 W m −2 (following the first eruption) and −2.5 W m −2 (after each of the three remaining eruptions) at a global scale. Associated with this, we observe a global surface cooling of the order of 1.5 ∘ C following the first (tropical) eruption, with the following three extratropical eruptions extending the cooling period for more than 15 years. Consequently, this series of eruptions is observed to constrain the northward migration of the inter-tropical convergence zone (ITCZ) during the Northern Hemisphere summer monsoon season, and major monsoon zones (African, South Asian, and East Asian) were seen to experience a suppression of rainfall of >1 mm d −1 during the monsoon (JJAS) season averaged for 2 years after each eruption. A substantial suppression of the Indian and North African summer monsoon (over the Nile River headwater region) was seen to strongly ... Text ice core Copernicus Publications: E-Journals Indian Climate of the Past 19 1 249 275 |
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English |
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The Ptolemaic era (305–30 BCE) is an important period of Ancient Egyptian history known for its material and scientific advances, but also intermittent political and social unrest in the form of (sometimes widespread) revolts against the Ptolemaic elites. While the role of environmental pressures has long been overlooked in this period of Egyptian history, ice-core-based volcanic histories have identified the period as experiencing multiple notable eruptions, and a repeated temporal association between explosive volcanism and revolt has recently been noted. Here we analyze the global and regional (Nile River basin) hydroclimatic response to a unique historical sequence of four large and closely timed volcanic eruptions (first a tropical one, followed by three extratropical northern hemispheric events) between 168 and 158 BCE, a particularly troubled period in Ptolemaic history for which we now provide a more detailed hydroclimatic context. The NASA (National Aeronautics and Space Administration) GISS (Goddard Institute for Space Studies) ModelE2.1 Earth system model simulates a strong radiative response with a radiative forcing (top of atmosphere) of −7.5 W m −2 (following the first eruption) and −2.5 W m −2 (after each of the three remaining eruptions) at a global scale. Associated with this, we observe a global surface cooling of the order of 1.5 ∘ C following the first (tropical) eruption, with the following three extratropical eruptions extending the cooling period for more than 15 years. Consequently, this series of eruptions is observed to constrain the northward migration of the inter-tropical convergence zone (ITCZ) during the Northern Hemisphere summer monsoon season, and major monsoon zones (African, South Asian, and East Asian) were seen to experience a suppression of rainfall of >1 mm d −1 during the monsoon (JJAS) season averaged for 2 years after each eruption. A substantial suppression of the Indian and North African summer monsoon (over the Nile River headwater region) was seen to strongly ... |
format |
Text |
author |
Singh, Ram Tsigaridis, Kostas LeGrande, Allegra N. Ludlow, Francis Manning, Joseph G. |
spellingShingle |
Singh, Ram Tsigaridis, Kostas LeGrande, Allegra N. Ludlow, Francis Manning, Joseph G. Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
author_facet |
Singh, Ram Tsigaridis, Kostas LeGrande, Allegra N. Ludlow, Francis Manning, Joseph G. |
author_sort |
Singh, Ram |
title |
Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
title_short |
Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
title_full |
Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
title_fullStr |
Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
title_full_unstemmed |
Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history |
title_sort |
investigating hydroclimatic impacts of the 168–158 bce volcanic quartet and their relevance to the nile river basin and egyptian history |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-249-2023 https://cp.copernicus.org/articles/19/249/2023/ |
geographic |
Indian |
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Indian |
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ice core |
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ice core |
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eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-19-249-2023 https://cp.copernicus.org/articles/19/249/2023/ |
op_doi |
https://doi.org/10.5194/cp-19-249-2023 |
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Climate of the Past |
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19 |
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1 |
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249 |
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275 |
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1766029713081368576 |