气候变化领域集成服务门户(CCPortal): Atlantic hurricane response to Saharan greening and reduced dust emissions during the mid-Holocene

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DOI	10.5194/cp-17-675-2021
	Atlantic hurricane response to Saharan greening and reduced dust emissions during the mid-Holocene
	Dandoy S.; Pausata F.S.R.; Camargo S.J.; Laprise R.; Winger K.; Emanuel K.
发表日期	2021
ISSN	1814-9324
起始页码	627
结束页码	661
卷号	17 期号:2
英文摘要	We use a high-resolution regional climate model to investigate the changes in Atlantic tropical cyclone (TC) activity during the period of the mid-Holocene (MH: 6000 years BP) with a larger amplitude of the seasonal cycle relative to today. This period was characterized by increased boreal summer insolation over the Northern Hemisphere, a vegetated Sahara and reduced airborne dust concentrations. A set of sensitivity experiments was conducted in which solar insolation, vegetation and dust concentrations were changed in turn to disentangle their impacts on TC activity in the Atlantic Ocean. Results show that the greening of the Sa hara and reduced dust loadings (MHGS+RD) lead to a larger increase in the number of Atlantic TCs (27 %) relative to the pre-industrial (PI) climate than the orbital forcing alone (MHPMIP; 9 %). The TC seasonality is also highly modified in the MH climate, showing a decrease in TC activity dur ing the beginning of the hurricane season (June to August), with a shift of its maximum towards October and Novem ber in the MHGS+RD experiment relative to PI. MH experi ments simulate stronger hurricanes compared to PI, similar to future projections. Moreover, they suggest longer-lasting cyclones relative to PI. Our results also show that changes in the African easterly waves are not relevant in altering the frequency and intensity of TCs, but they may shift the loca tion of their genesis. This work highlights the importance of considering vegetation and dust changes over the Sahara re gion when investigating TC activity under a different climate state. © 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183592
作者单位	Department of Earth and Atmospheric Sciences, Université du Québec À Montréal, Montreal, QC, Canada; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Program in Atmospheres, Oceans and Climate, Department of Earth, Cambridge, MA, United States; Canadian Meteorological Aviation Centre, Environment and Climate Change Canada, Montreal, QC, Canada
推荐引用方式 GB/T 7714	Dandoy S.,Pausata F.S.R.,Camargo S.J.,et al. Atlantic hurricane response to Saharan greening and reduced dust emissions during the mid-Holocene[J],2021,17(2).
APA	Dandoy S.,Pausata F.S.R.,Camargo S.J.,Laprise R.,Winger K.,&Emanuel K..(2021).Atlantic hurricane response to Saharan greening and reduced dust emissions during the mid-Holocene.Climate of the Past,17(2).
MLA	Dandoy S.,et al."Atlantic hurricane response to Saharan greening and reduced dust emissions during the mid-Holocene".Climate of the Past 17.2(2021).