干旱区生态环境知识资源中心(Arid): 黄土高原东西部全新世剖面炭屑记录的火环境变化

Arid

	黄土高原东西部全新世剖面炭屑记录的火环境变化
其他题名	Changes of Fire Environment Recorded by Charcoal Hided in Holocene Profiles in the Eastern and Western Loess Plateau
	曹艳峰 1; 黄春长 2; 韩军青 1; 李云岗 1; 张珊珊 1
ISSN	1672-0504
出版年	2007
卷号	23 期号:1 页码:92-96
中文摘要	对黄土高原东、西部全新世3个典型黄土-土壤剖面磁化率和炭屑浓度进行分析和对比研究，探讨该区域剖面中炭屑含量变化及其所记录的火环境变化特征。马兰黄土堆积时期，气候干旱而不稳定，地方性和区域性火频繁发生，炭屑含量较高；全新世早期，气候由冷干向温湿过渡，但仍较干旱，炭屑含量相应也较高；全新世中期是全新世最为温暖湿润的时期，炭屑含量出现全新世时期的最低值，但在夏商文化时期和庙底沟文化时期炭屑含量出现峰值，则是人类活动的结果；全新世晚期，在干旱的气候条件下，人类活动加速了火的频率和强度，炭屑含量大幅度增加。在全新世不同时期，黄土高原东、西部的炭屑含量存在一定差异，黄土高原东部火活动较为微弱，而西部火活动相对频繁，这是火环境条件区域差异性的表现。
英文摘要	Charcoal, the product of the incomplete combustion of plant organisms, remains in the soil and other kinds of sediments and can be used to construct a ehrono - sequence of fire frequency over thousands to tens of tbousand of years. Charcoal content is related to both climatic changes and human activities. By analyzing magnetic susceptibility and charcoal content at three different profiles in the eastern and western of Loess Plateau, the laws of eharcoal content in the three soil profiles and the features of environmental changes of fire were studied. During the phase of Malan Loess pilling（ - 11 500 aB. P. ）, because of the dry climate, the local and regional natural fire frequently occurred and charcoal content was high. In the early Holocene（11 500-8 500 aB. P. ）,the climate was still dry although it was becoming warmer and wetter. The dry climate apparently creating favorable conditions for natural fires to occur,which suggested charcoal content was high. The Holocene Megathermal（8 500-3 100 aB. P. ） was the warmest and wettest period during the Holocene,and very little charcoal was found in the soil with the exception of the culture phase because the high precipitation during this period apparently suppressed natural fires. But human activities increased the fire frequency during the culture phase,so a peak in the charcoal content was showed. During the late Holocene（3 100-0 aB. P.）, the climate became drier and conditions were once again favorable for fires to occur naturally. The amount of charcoal in the soil greatly increased during this period that showed the greatest levels of fire activity of the entire Holocene. The great amount of charcoal was related to both the arid climate and increased human activities. Charcoal content in the eastern and western Loess Plateau was different on the different period of Holocene because of different environment conditions.
中文关键词	黄土高原 ; 全新世 ; 炭屑记录 ; 火环境
英文关键词	Loess Plateau Holocene eharcoal record fire environment
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:2748781
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220771
作者单位	1.山西师范大学城市与环境科学学院, 临汾, 山西 041004, 中国; 2.陕西师范大学旅游与环境科学学院, 西安, 陕西 710062, 中国
推荐引用方式 GB/T 7714	曹艳峰,黄春长,韩军青,等. 黄土高原东西部全新世剖面炭屑记录的火环境变化[J]. 陕西师范大学,2007,23(1):92-96.
APA	曹艳峰,黄春长,韩军青,李云岗,&张珊珊.(2007).黄土高原东西部全新世剖面炭屑记录的火环境变化.,23(1),92-96.
MLA	曹艳峰,et al."黄土高原东西部全新世剖面炭屑记录的火环境变化".23.1(2007):92-96.