【摘 要】
：
Numerous field studies have shown that leaf wax n-alkane δD values(δDn-alkane)can be used as a proxy for paleoelevation reconstruction.However,the lack of systematic global analysis of δDn-alkane values with respect to altitude limits the reliability of δ
【机 构】
：
State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy
论文部分内容阅读
Numerous field studies have shown that leaf wax n-alkane δD values(δDn-alkane)can be used as a proxy for paleoelevation reconstruction.However,the lack of systematic global analysis of δDn-alkane values with respect to altitude limits the reliability of δDn-a1kane values for paleoaltimetry at the global scale.In this study,we analyzed the variation of δDn-alkane values with altitude in terrestrial higher plants based upon our compiled global δDn-alkane database.The general decrease in δDn-alkane values with altitude corresponds to the variation in precipitation δD(δDprec)with altitude,suggesting that the δDn-alkane values effectively reflect δDprec values.When eliminating the effect of latitude at the global scale,the global δDn-alkane-altitude lapse rate for all species was-1.01±0.10‰(100 m)-1,while these lapse rates were-1.03±0.13‰ and-0.47±0.13‰(100 m)-1 for dicots and monocots,respectively.Our study reveals that it is reliable to use δDn-alkane values to gain information about paleoelevation at the global scale,and the global δDn-alkane-altitude lapse rates provide an alternative to reconstruct paleoelevation at someδDn-alkane-uninvestigated areas.
其他文献
Clinical cases have reported pulmonary arterial structural and functional abnormalities in patients with Kawasaki disease (KD);however,the underlying mechanisms are unclear.In this study,a KD rat model was established via the intraperitoneal injection of
The history and mechanisms of dust storms in northern China remain unclear owing to the paucity of reliable long-term,high-resolution geological records.In this study,we reconstructed the dust storm history of the last～500 years in northern China,based on
As a potential cancer immunotherapeutic agent,chlorogenic acid(CHA)has entered phase Ⅱ clinical trials in China as a lyophilized powder formulation for treating glioma.However,the in vivo instability of CHA necessitates daily intramuscular injections,resu
Global warming and its climatic and environmental effects have mainly been investigated in terms of the absolute warming rate.Little attention has been paid to the contribution of absolute warming rate to variability on various time scales of surface air
Almost all proxy-based temperature reconstructions for East Asia have hitherto been designed to resolve summer or annual temperature variability.Reconstruction for the winter temperature is still lacking.Here,we report an annually resolved,winter-season (
Quantifying the density contrasts of the Earth\'s inner core boundary(ICB)is crucial to understand core-mantle coupling and the generation of the geodynamo.The PKiKP/PcP amplitude ratio is commonly used to obtain the density contrast at the ICB,but its
Quartz crystallinity index(QCI)was used to reflect the crystallisation of silica in the Late Ordovician Wufeng(WF)and Early Silurian Longmaxi(LM)Formation shale,as well as the airborne volcanic ash-derived silica in the Lucaogou Formation tuffaceous shale
The Late Triassic Tianqiaoling flora is well-known in China,and its discovery has changed our understanding of Chinese Late Triassic phytogeographical divisions.More broadly,this flora has great significance for the study of phytogeo-graphy in East Asia d
The predominant types of high-grade iron deposits in China include skarn,sedimentary metamorphic(banded iron-formation,BIF-type),continental/submarine volcanic-hosted and magmatic Fe-Ti-V oxide deposits.Based on a comprehensive review of current studies o
Previous researches had emphasized tectonic impacts on the fluvial system at the tectonically active areas,while the effects oflithology and local base level change have received relatively rare attention.Here we investigated fluvial landforms at differen