IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
The "Hockey Stick" Imprint in Northwest African Speleothems
Sha, Lijuan1; Brahim, Yassine Ait2; Wassenburg, Jasper A.3,4; Yin, Jianjun5; Lu, Jiayu1; Cruz, Francisco W.6; Cai, Yanjun1; Edwards, R. Lawrence7; Cheng, Hai1,5,8
Corresponding AuthorSha, Lijuan(shalijuan@xjtu.edu.cn) ; Cheng, Hai(cheng021@xjtu.edu.cn)
2021-09-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume48Issue:17Pages:11
AbstractWe present absolutely dated speleothem delta O-18 records spanning the past similar to 1.5 kyr, which provide new evidence of the transmission of an anthropogenic signal to natural climatic archives in NW Africa. Combined with three other speleothem delta O-18 records from SW Morocco, the results indicate unprecedentedly dry conditions during the 20th century, which developed more rapidly than those during the Medieval Climate Anomaly (900-1350 CE), likely due to rising atmospheric CO2 levels. The 20th century drying evident in the speleothem records is consistent with the "Hockey Stick" pattern of increasing temperatures due to global warming. We demonstrate that this rapid drying is linked to warmer sea surface temperatures (SSTs) over the Azores High region, and cooler local SSTs off the coast of NW Africa. These changes intensified the Canary Current Upwelling, which promoted increased biological productivity in the surface water and enhanced the coastal fishing industry in Morocco.
Keywordspeleothems Hockey Stick Northwest Africa global warming SST upwelling
DOI10.1029/2021GL094232
WOS KeywordNORTHERN-HEMISPHERE TEMPERATURE ; STABLE-ISOTOPE VARIATIONS ; ATLANTIC OSCILLATION ; WINTER TEMPERATURES ; CLIMATE-CHANGE ; TRACE-ELEMENT ; RECONSTRUCTION ; MOROCCO ; VARIABILITY ; RECORDS
Indexed BySCI ; SCI
Language英语
Funding ProjectNSFC[41888101] ; NSFC[41731174] ; NSFC[41561144003] ; Institute for Basic Science (IBS), Republic of Korea[IBS-R028-Y2] ; FAPESP[2017/50085-3]
WOS Research AreaGeology
Funding OrganizationNSFC ; Institute for Basic Science (IBS), Republic of Korea ; FAPESP
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000694653200011
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/16982
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorSha, Lijuan; Cheng, Hai
Affiliation1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
2.Univ Basel, Dept Environm Sci, Basel, Switzerland
3.Inst Basic Sci, Ctr Climate Phys, Busan, South Korea
4.Pusan Natl Univ, Busan, South Korea
5.Chinese Acad Geol Sci, Key Lab Karst Dynam, MNR & Guangxi, Inst Karst Geol, Guilin, Peoples R China
6.Sao Paulo, Inst Geociencias Univ, Sao Paulo, Brazil
7.Univ Minnesota, Dept Earth Sci, Minneapolis, MN USA
8.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Peoples R China
Recommended Citation
GB/T 7714
Sha, Lijuan,Brahim, Yassine Ait,Wassenburg, Jasper A.,et al. The "Hockey Stick" Imprint in Northwest African Speleothems[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(17):11.
APA Sha, Lijuan.,Brahim, Yassine Ait.,Wassenburg, Jasper A..,Yin, Jianjun.,Lu, Jiayu.,...&Cheng, Hai.(2021).The "Hockey Stick" Imprint in Northwest African Speleothems.GEOPHYSICAL RESEARCH LETTERS,48(17),11.
MLA Sha, Lijuan,et al."The "Hockey Stick" Imprint in Northwest African Speleothems".GEOPHYSICAL RESEARCH LETTERS 48.17(2021):11.
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