干旱区生态环境知识资源中心(Arid): Environmental changes in Sorbas arid region (Southern Spain) during MIS 5a inferred from a carbonate flowstone from a gypsum cave

Arid

DOI	10.1016/j.palaeo.2022.111275
	Environmental changes in Sorbas arid region (Southern Spain) during MIS 5a inferred from a carbonate flowstone from a gypsum cave
	Columbu, Andrea; Gazquez, Fernando; Corrick, Ellen; Hellstrom, John; Drysdale, Russell
通讯作者	Columbu, A
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2022
卷号	607
英文摘要	Present climate conditions impede the formation of calcite speleothems in the gypsum caves of the semi-arid region of Sorbas (Southern Spain). However, U-Th dating reveals the uninterrupted deposition of a 46 mm -thick carbonate flowstone in the Sorbas caves from-78 to-71 ka, during Marine Isotope Stage (MIS) 5a. This indicates that the area was vegetated during this period, producing biogenic CO2 in soils necessary for the un-derground deposition of the speleothem, which contrasts with the current unvegetated landscape. During MIS 5a, rainfall recharged the karst aquifer, leading to cave seepage. The development of soils and persistent water infiltration suggests a higher precipitation/evapotranspiration ratio with respect to the present, which was likely favored by lower regional temperatures and a different annual rainfall regime. 818O and 813C analyses testify that the speleothem recorded climate pulses synchronous, and structurally similar, with Greenland interstadial and stadial periods, with relatively wetter conditions recorded during interstadials 21.1, 20 and 19.2, and drier periods during stadials 21.1 and 20. This demonstrates that the climate in the desert-like environment of Sorbas is sensitive to inter-and intra-hemispherical triggers, such as the extent of Northern ice sheets and the Atlantic meridional overturning circulation. Interstadials (stadials) were also characterized by a higher (lower) Atlantic/ Mediterranean moisture source ratio. For the first time, we show that carbonate speleothems formed in arid gypsum caves can record reliable palaeoenvironmental information spanning multiple millennia, procuring proxies for detailed palaeoclimate reconstructions. Such speleothems are thus excellent candidates for under-standing past climate dynamics and patterns in desert-like gypsum terrains.
英文关键词	Arid regions Speleothems Palaeoclimate reconstructions Mediterranean area Abrupt climate change Dansgaard-Oeschger climate variability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000878776800002
WOS关键词	ATLANTIC COLD EVENTS ; CLIMATE VARIABILITY ; NORTHERN-HEMISPHERE ; SPELEOTHEMS ; EVOLUTION ; RECORDS ; KARST ; KA ; RECONSTRUCTION ; CONDENSATION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393908
推荐引用方式 GB/T 7714	Columbu, Andrea,Gazquez, Fernando,Corrick, Ellen,et al. Environmental changes in Sorbas arid region (Southern Spain) during MIS 5a inferred from a carbonate flowstone from a gypsum cave[J],2022,607.
APA	Columbu, Andrea,Gazquez, Fernando,Corrick, Ellen,Hellstrom, John,&Drysdale, Russell.(2022).Environmental changes in Sorbas arid region (Southern Spain) during MIS 5a inferred from a carbonate flowstone from a gypsum cave.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,607.
MLA	Columbu, Andrea,et al."Environmental changes in Sorbas arid region (Southern Spain) during MIS 5a inferred from a carbonate flowstone from a gypsum cave".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 607(2022).