您的位置: 专家智库 > >

国家自然科学基金(41271215)

作品数:9 被引量:58H指数:6
相关作者:靳鹤龄刘冰孙忠苏志珠张彩霞更多>>
相关机构:中国科学院山西大学兰州大学更多>>
发文基金:国家自然科学基金中国科学院重点部署项目中国博士后科学基金更多>>
相关领域:天文地球更多>>

文献类型

  • 9篇中文期刊文章

领域

  • 9篇天文地球

主题

  • 4篇沙地
  • 4篇气候
  • 4篇气候变化
  • 4篇全新世
  • 2篇晚全新世
  • 2篇粒度
  • 2篇科尔沁沙地
  • 2篇季风
  • 2篇共和盆地
  • 2篇NORTHE...
  • 2篇SINCE
  • 1篇东北部
  • 1篇冬夏季
  • 1篇冬夏季风
  • 1篇沙漠演化
  • 1篇盛冰期
  • 1篇突变事件
  • 1篇气候演变
  • 1篇青藏
  • 1篇青藏高原

机构

  • 5篇中国科学院
  • 2篇兰州大学
  • 2篇山西大学
  • 1篇中国科学院大...
  • 1篇中国科学院西...

作者

  • 5篇靳鹤龄
  • 4篇刘冰
  • 3篇孙忠
  • 2篇李冠华
  • 2篇张彩霞
  • 2篇赵爽
  • 2篇苏志珠
  • 2篇夏敦胜
  • 1篇柳加波
  • 1篇贾佳
  • 1篇温仰磊
  • 1篇高福元

传媒

  • 4篇中国沙漠
  • 2篇Resear...
  • 1篇地球物理学报
  • 1篇第四纪研究
  • 1篇Journa...

年份

  • 1篇2019
  • 2篇2016
  • 1篇2015
  • 1篇2014
  • 4篇2013
9 条 记 录,以下是 1-9
排序方式:
A late Holocene winter monsoon record inferred from the palaeo-aeolian sand dune in the southeastern Mu Us Desert, northern China被引量:4
2016年
The variation of the Asian winter monsoonal strength has seriously affected the climate and environmental conditions in the Asian monsoonal region, and even in marginal islands and the ocean in the East Asian region. However, relevant under-standing remains unclear due to the lack of suitable geological materials and effective proxies in the key study areas. Here, we present a grain-size record derived from the palaeo-aeolian sand dune in the southeastern Mu Us Desert, together with other proxies and OSL dating, which reflect a relatively detailed history of the winter monsoon and abrupt environmental events during the past 4.2 ka. Our grain-size standard deviation model indicated that 〉224 μm content can be considered as an indicator of the intensity of Asian winter monsoon, and it shows declined around 4.2–2.1 ka, enhanced but unstable in 2.1–0.9 ka, and obviously stronger since then. In addition, several typical climate events were also documented, forced by the periodic variation of winter monsoonal intensity. These include the cold intervals of 4.2, 2.8, 1.4 ka, and the Little Ice Age (LIA), and relatively warm sub-phases around 3.0, 2.1, 1.8 ka, and the Medieval Warm Period (MWP), which were roughly accordant with the records of the aeolian materials, peat, stalagmites, ice cores, and sea sediments in various latitudes of the Northern Hemisphere. Combined with the previous progresses of the Asian summer monsoon, we prelimi-narily confirmed a millennial-scale anti-correlation of Asian winter and summer monsoons in the Late Holocene epoch. This study suggests that the evolution of the palaeo-aeolian sand dune has the potential for comprehending the history of Asian monsoon across the desert regions of the modern Asian monsoonal margin in northern China.
Bing LiuHeLing JinFan Yang
科尔沁沙地过去近5000年高分辨率气候演变被引量:7
2013年
摘要选择位于科尔沁沙地东北缘的六户屯剖面为研究对象,利用7个常规^14C年龄建立了风沙沉积的时间序列,通过对风沙沉积物粒度、CaCO3含量、有机质含量和环境磁学指标的系统分析,重建了科尔沁地区4300~1000cal.aB.P.的气候演化历史。结果显示,4300-3800cal.aB.P.为全新世大暖期末期,是研究区气候最暖湿的时期,且暖湿程度有不断降低的趋势;3800—1700cal.aB.P.为冷干气候期,其中3000cal.aB.P.为气候演变的节点,前期气候由暖湿逐步向冷干过渡,后期冬季风持续强盛,夏季风则逐渐恢复;1700—1000cal.aB.P.为亚暖湿气候期,气候条件相对暖湿,但不及大暖期时期。此外,环境磁学研究发现,磁粒度参数)CARM/X1和ZARm/SIRM可以作为气候代用指标,而常用的磁化率参数在本研究中指示意义不明确。由于原生碎屑磁性矿物已经达到稳定单畴(SSD)粒级,XARM/XH和HARM/SIRM与成壤作用表现为反相关。
赵爽夏敦胜靳鹤龄温仰磊柳加波刘冰李冠华
关键词:气候变化
中晚全新世科尔沁沙地演化与气候变化被引量:18
2013年
科尔沁沙地位于东亚季风区的东北缘,环境对气候变化反应非常敏感。地层沉积相、粒度与地球化学参数表明中晚全新世科尔沁沙地环境与气候变化可以分为以下3个阶段:7.0~3.6cal ka BP,沙地逐渐固定、缩小,冬季风减弱,夏季风不断增强,气候趋于暖湿;3.6~1.3cal ka BP,沙地总体上较为稳定,但也存在活化、扩张,与上一阶段相比夏季风强度有所降低,但仍强于冬季风,气候相对暖湿;1.3~0.65cal ka BP,沙地出现多次活化、扩张和固定、缩小,冬夏季风交替频繁,气候呈现冷干-相对暖湿的组合。具体来讲,中晚全新世以来科尔沁沙地存在8次活化、扩张和8次固定、缩小期,气候变化也存在8次冷干和8次相对暖湿期,两者存在明显的对应关系。太阳辐射与全球冰量变化是中晚全新世科尔沁沙地演化与气候格局的主要驱动力。
刘冰靳鹤龄孙忠
关键词:中晚全新世科尔沁沙地沙漠演化气候变化
Geochemical weathering of aeolian sand and its palaeoclimatic implications in the Mu Us Desert,northern China,since the Late Holocene被引量:6
2016年
In the semi-arid and arid regions of northern China,geochemical behavior of the aeolian deposit is closely related to climatic and environmental changes,which was used to reconstruct the past history of environmental evolution and possibly forcing mechanisms.However,the related result was still scarce due to the lack of detailed geochemical analysis results in the desert sediments.In the present study,we systematically analyzed the geochemical components and parameters of the paleo-aeolian sand dune and modern mobile sand deposits in the Mu Us Desert and discuss the climatic variation inferred from the paleo-aeolian sand dune during the past 4.2 ka BP.The results indicated that (1) geochemical composition of the sandy deposits were dominated by SiO_2,Al_2O_3 and Na_2O and the deposits probably originated from the widespread upper continental crust (UCC) and were formed by long-term weathering,transport and re-deposition;(2) these sandy deposits were subjected to weaker weathering or uneven weathering under cold and dry conditions,and had highly similar material sources and degrees of weathering and leaching in general;and (3) the direct OSL (Optically Stimulated Luminescence) dating ages and geochemical parameters from the palaeosol-aeolian sand dune indicated that the regional climate change experienced several typically cold and warm intervals.These intervals are 4.2,2.8 ka BP and Little Ice Age and Medieval Warm Period,which probably attributed to periodic variations of the Asian summer monsoonal strength and cold events of the northern Atlantic Ocean in low and high latitudes of the Northern Hemisphere.Our results suggest that the development of the sand dune in the Mu Us Desert provided a suitable archive for understanding the past local climatic change,which is linked to the global climatic change.
LIU BingJIN HelingSUN ZhongZHAO Shuang
末次盛冰期以来青藏高原东北部共和盆地冬夏季风演化记录被引量:10
2013年
对青藏高原东北部共和盆地冬其剖面的化学元素与粒度分析表明,末次盛冰期以来区域冬夏季风总体上呈现此消彼长的关系,气候出现多次冷干-暖湿旋回。15.82ka BP之前冬季风最强,夏季风最弱,为末次盛冰期时的冷干气候,但21ka BP之前气候可能寒冷偏湿。15.82~9.5ka BP夏季风明显增强,冬季风衰弱,气候明显转暖,其中老仙女木时期(14.7~13.7aBP)和新仙女木时期(12.1~9.5ka BP)气候相对冷干,而B-A时期(13.7~12.1ka BP)气候相对暖湿。全新世以来冬夏季风出现多次波动,9.5~7.0ka BP夏季风相对较强,气候相对暖湿;7.0~5.1ka BP冬夏季风强弱交替频繁,气候出现冷干-暖湿旋回;5.1~2.7ka BP夏季风总体较强,气候温暖湿润;2.7ka BP之后冬季风明显增强,气候趋于冷干。此外,区域冬夏季风演变过程与极地冰芯记录的冷暖事件大体一致,可以认为共和盆地气候变化是全球气候变化的区域响应。
刘冰靳鹤龄孙忠苏志珠张彩霞
关键词:末次盛冰期共和盆地化学元素粒度
中国季风边缘区全新世沙地演化及其驱动机制研究进展
2019年
中国季风边缘区全新世沙地演化和气候变化自东向西具有明显差异性。东部科尔沁沙地、中部毛乌素沙地呈现典型三段式沙地演化过程,西部共和盆地呈现多阶段多反复的沙地演化特征。东部科尔沁沙地、中部毛乌素沙地气候变化也呈现三段式,西部共和盆地由于地域特征气候变化相对复杂。全新世气候突变事件对各区产生差异影响。太阳辐射强度控制的亚洲季风环流和有效湿度变化影响沙地演化过程。
薛文萍靳鹤龄刘冰孙良英刘振宇
关键词:全新世气候变化突变事件
Winter and summer monsoonal evolution in Gonghe Basin, northeastern Qinghai-Tibetan Plateau since the Last Glacial Maximum
2013年
Geochemical and grain size analysis on the DQ (Dongqi) profile from Gonghe Basin, northeastern Qinghai-Tibetan Plateau, indi- cates that regional climate has experienced several cold-dry and warm-wet cycles since the last glacial maximum (LGM). The cold and dry climate dominated the region before 15.82 cal. ka B.E due to stronger winter monsoon and weaker summer monsoon, but the climate was relatively cold and wetter prior to 21 cal. ka B.E. In 15.824.5 cal. ka B.E, summer monsoon strength in- creased and winter monsoon tended to be weaker, implying an obvious warm climate. Specifically, the relatively cold and dry condition appeared in 14.7-13.7 cal. ka B.E and 12.14.5 cal. ka B.R, respectively, while relatively warm and wet in 13.~12.1 cal. ka B.E. The winter and summer monsoonal strength presents frequent fluctuations in the Holocene and relatively warm and wet conditions emerged in 9.5~.0 cal. ka B.E due to stronger summer monsoon. From 7.0 to 5.1 cal. ka B.E, the cycle of cold-dry and warm-wet climate corresponds to frequent fluctuations of winter and summer monsoons. The climate becomes warm and wet in 5.1 2.7 cal. ka B.E, accompanying increased summer monsoon, but it tends to be cold and dry since 2.7 cal. ka B.R due to en- hanced winter monsoonal strength. In addition, the evolution of regional winter and summer monsoons is coincident with warm and cold records from the polar ice core. In other words, climatic change in the Gonghe Basin can be considered as a regional re- sponse to global climate change.
Bing LiuHeLing JinZhong SunZhiZhu SuCaiXia Zhang
全新世共和盆地沙地时空演化及其驱动机制被引量:16
2014年
通过分析青藏高原东北部共和盆地现代固定沙丘、半固定-半流动沙丘和流动沙丘的粒度与地球化学元素特征,建立了不同类型沙丘沉积物的理化指标体系,并尝试性地将其用于地质时期沙漠演化研究。同时,结合区域典型风成砂-古土壤剖面的相变特征,探讨了全新世共和盆地沙地的时空演化过程及其驱动机制。结果表明:全新世共和盆地沙地存在多次活化、扩张和固定、缩小,除11.8~10.1ka为流动沙地以外,其余阶段多在半流动-半固定沙地和固定沙地之间频繁转换,这一变化特征与其相邻的柴达木盆地沙地和青海湖地区环境变化具有良好的可比性。此外,发现沙地环境变化对湿度状况十分敏感,而湿度又受控于区域冬、夏季风的强度,也就是说全新世共和盆地沙地演化是气候变化的产物。
刘冰靳鹤龄孙忠苏志珠张彩霞
关键词:全新世共和盆地气候变化
毛乌素沙地风沙沉积物磁学特征及其古环境意义被引量:6
2015年
在沙漠沉积环境中,成土作用对磁化率的贡献较小,往往被原生磁信号掩盖,因此分离两种磁组分对气候和粉尘代用指标的提取至关重要.本研究选取位于毛乌素沙地东缘的锦界风沙沉积剖面为研究对象,利用多变量一元线性回归中的"平均值概念"进行磁化率的原生碎屑组分0和次生成土组分Xpedo的分离,并探讨磁学参数所承载的气候和环境意义.结果显示,磁学比值参数(如Xpedo/X0、Xfd/HIRM、Xfd%和XARM/SIRM)彼此之间存在显著线性或指数/对数相关关系,它们对成土强度指示明确,可以在一定程度上减小或避免磁性矿物背景值差异所产生的误差,与磁化率相比更适宜用于该区的古降水量重建.HIRM主要由碎屑赤铁矿含量控制,HIRM与X0存在明显正相关关系,表明碎屑赤铁矿随原生磁性矿物总体含量的增加(减少)而增加(减少),在粉尘成因磁性矿物中所占比例大致稳定,从而HIRM可以指示源区粉尘通量的变化.锦界剖面的原生和次生磁性矿物浓度均明显低于黄土高原黄土,不同地层X0和Xpedo在磁化率中所占的比例存在较大差异,因此磁化率的环境意义比较复杂,在使用其恢复古气候古环境时需慎重.
赵爽高福元贾佳李冠华夏敦胜靳鹤龄
关键词:降水量环境磁学毛乌素沙地
共1页<1>
聚类工具0