Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene
Abstract Changes in land cover and dust emission may significantly influence the Northern Hemisphere land monsoon precipitation (NHLMP), but observations are too short to fully evaluate their impacts. The “Green Sahara” during the mid‐Holocene (6,000 years BP) provides an opportunity to unravel thes...
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2019GL082116 |
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| author | Weiyi Sun Bin Wang Qiong Zhang Francesco S. R. Pausata Deliang Chen Guonian Lu Mi Yan Liang Ning Jian Liu |
| author_facet | Weiyi Sun Bin Wang Qiong Zhang Francesco S. R. Pausata Deliang Chen Guonian Lu Mi Yan Liang Ning Jian Liu |
| author_sort | Weiyi Sun |
| collection | DOAJ |
| description | Abstract Changes in land cover and dust emission may significantly influence the Northern Hemisphere land monsoon precipitation (NHLMP), but observations are too short to fully evaluate their impacts. The “Green Sahara” during the mid‐Holocene (6,000 years BP) provides an opportunity to unravel these mechanisms. Here we show that during the mid‐Holocene, most of the NHLMP changes revealed by proxy data are reproduced by the Earth System model results when the Saharan vegetation cover and dust reduction are taken into consideration. The simulated NHLMP significantly increases by 33.10% under the effect of the Green Sahara. The North African monsoon precipitation increases most significantly. Additionally, the Saharan vegetation (dust reduction under vegetated Sahara) alone remotely intensifies the Asian (North American) monsoon precipitation through large‐scale atmospheric circulation changes. These findings imply that future variations in land cover and dust emissions may appreciably influence the NHLMP. |
| format | Article |
| id | doaj-art-52d67e7584fa4e3baa46f7056ffef56c |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-52d67e7584fa4e3baa46f7056ffef56c2025-08-20T02:12:20ZengWileyGeophysical Research Letters0094-82761944-80072019-08-0146169870987910.1029/2019GL082116Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle HoloceneWeiyi Sun0Bin Wang1Qiong Zhang2Francesco S. R. Pausata3Deliang Chen4Guonian Lu5Mi Yan6Liang Ning7Jian Liu8Key Laboratory for Virtual Geographic Environment, Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science Nanjing Normal University Nanjing ChinaDepartment of Atmospheric Sciences and Atmosphere‐Ocean Research Center University of Hawai'i at Mānoa Honolulu HI USADepartment of Physical Geography and Bolin Centre for Climate Research Stockholm University Stockholm SwedenCentre ESCER (Étude et la Simulation du Climat à l’Échelle Régionale) and GEOTOP (Research Center on the dynamics of the Earth System), Department of Earth and Atmospheric Sciences University of Quebec in Montreal Montreal CanadaRegional Climate Group, Department of Earth Sciences University of Gothenburg Gothenburg SwedenKey Laboratory for Virtual Geographic Environment, Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science Nanjing Normal University Nanjing ChinaKey Laboratory for Virtual Geographic Environment, Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science Nanjing Normal University Nanjing ChinaKey Laboratory for Virtual Geographic Environment, Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science Nanjing Normal University Nanjing ChinaKey Laboratory for Virtual Geographic Environment, Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science Nanjing Normal University Nanjing ChinaAbstract Changes in land cover and dust emission may significantly influence the Northern Hemisphere land monsoon precipitation (NHLMP), but observations are too short to fully evaluate their impacts. The “Green Sahara” during the mid‐Holocene (6,000 years BP) provides an opportunity to unravel these mechanisms. Here we show that during the mid‐Holocene, most of the NHLMP changes revealed by proxy data are reproduced by the Earth System model results when the Saharan vegetation cover and dust reduction are taken into consideration. The simulated NHLMP significantly increases by 33.10% under the effect of the Green Sahara. The North African monsoon precipitation increases most significantly. Additionally, the Saharan vegetation (dust reduction under vegetated Sahara) alone remotely intensifies the Asian (North American) monsoon precipitation through large‐scale atmospheric circulation changes. These findings imply that future variations in land cover and dust emissions may appreciably influence the NHLMP.https://doi.org/10.1029/2019GL082116Northern Hemisphere land monsoon precipitationmid‐HoloceneSaharan vegetationdust reductionEarth System model |
| spellingShingle | Weiyi Sun Bin Wang Qiong Zhang Francesco S. R. Pausata Deliang Chen Guonian Lu Mi Yan Liang Ning Jian Liu Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene Geophysical Research Letters Northern Hemisphere land monsoon precipitation mid‐Holocene Saharan vegetation dust reduction Earth System model |
| title | Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene |
| title_full | Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene |
| title_fullStr | Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene |
| title_full_unstemmed | Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene |
| title_short | Northern Hemisphere Land Monsoon Precipitation Increased by the Green Sahara During Middle Holocene |
| title_sort | northern hemisphere land monsoon precipitation increased by the green sahara during middle holocene |
| topic | Northern Hemisphere land monsoon precipitation mid‐Holocene Saharan vegetation dust reduction Earth System model |
| url | https://doi.org/10.1029/2019GL082116 |
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