长江流域资源与环境 >> 2005, Vol. 14 >> Issue (4): 486-490.

• 生态环境 • 上一篇    下一篇

兰州与江汉平原有机碳同位素的古气候指示意义对比研究

杨桂芳(1), 彭红霞(2), 陈中原(1), 李长安(2), 黄俊华(2), 胡超涌(2)   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-07-20
  • 通讯作者: 杨桂芳

PALEOCLIMATIC IMPLICATIONS OF LANZHOU AND JIANGHAN PLAIN: A CLIMATE PROXY STUDY OF ORGANIC CARBON ISOTOPE

YANG Gui-fang(1), PENG Hong-xia(2), CHEN Zhong-yuan(1), LI Chang-an(2), HUANG Jun-hua(2), HU Chao-yong(2)   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-20
  • Contact: YANG Gui-fang

摘要: 选择以干冷气候为主的兰州和温暖湿润的江汉平原作为研究区域,结合其他多种指标和研究区的岩性特征,对有机碳同位素δ13Corg的古气候指示意义进行了初步探讨。结果表明,在兰州地区,δ13Corg值波动反映C3/C4植物比例的改变,指示温度变化。δ13Corg值偏正时,表明C4植物含量较大,反映温度较高,而δ13Corg值偏负时,表明气候较冷;江汉平原δ13Corg值主要反映降水信息, δ13Corg值偏负时指示相对暖湿气候,δ13Corg值偏正反映气候偏干。δ13Corg等指标同时还揭示了末次盛冰期以来两地古气候类同特征:即12.0 ka BP之前气候相对偏干;在全新世晚期,气候波动中转暖。不同之处表现为:约在12.0~10.0 ka BP,当兰州气候还很干冷时,江汉平原已进入暖湿的冰后期;而在全新世早中期,当兰州气候转为暖湿时,江汉平原气候则表现为略偏干。

关键词: 有机碳同位素, 对比研究, 兰州, 江汉平原

Abstract: Regarded as a sensitive indicator to paleoclimatic change, the organic carbon isotope in loess and lake sediments is widely used to reflect paleoclimatic condition and paleoenvironmental evolution. By combining analysis of other proxies, this paper is to explore the implication of organic carbon isotope in Lanzhou which is typical of dry and cold climate setting and Jianghan Plain of warm and moist environment. The results show that the significance of organic carbon isotope is different according to the diversities of carriers. In Lanzhou, the δ13Corg values represent the ratios of C3 to C4 plants and reflect the changes of temperature. The higher and lower values of δ13Corg in sediment are the result responsible to warmer and colder paleoclimates, respectively. In contrast, the values of δ13Corg in Jianghan Plain can indicate the varieties of rainfall. With the variation of δ13Corg value from high to low, the climate changes from dry to wet. Further conclusions can be made based on the δ13Corg values together with other indicators. There are certain degree of similarities in paleoclimatic evolution in both areas. For instance, the drier climate before 12.0 ka BP and warmer environment with repetitious fluctuations in the late Holocene in Lanzhou and Jianghan Plain are analogous. Although 4 stages of paleoclimatic change can be recognized in both areas, the paleoclimatic evolutions are different. In general, the climate warming up in early Holocene is earlier in Jianghan Plain than in Lanzhou. In addition, the climate between 12.0 and 10.0 ka BP in Lanzhou area is characterized by dry and cold, while in Jianghan Plain it has evoved into the warm and wet interglacial epoch.

Key words: organic carbon isotope, comparative study, Lanzhou area, Jianghan Plain

[1] 陆俊, 黄进良, 王立辉, 裴艳艳. 基于时空数据融合的江汉平原水稻种植信息提取[J]. 长江流域资源与环境, 2017, 26(06): 874-881.
[2] 杨燕, 易军, 刘目兴, 张君, 李胜龙. 不同水耕年限稻田土壤水分运动特征研究[J]. 长江流域资源与环境, 2017, 26(02): 257-263.
[3] 张煦, 马驿, 郑雯, 汪善勤. 基于时序MODIS-NDVI的油菜种植面积变化趋势分析——以江汉平原为例[J]. 长江流域资源与环境, 2016, 25(03): 412-419.
[4] 邹书婷, 朱媛媛, 张永利, 杨琳, 曾菊新. 江汉平原土地资源诅咒效应研究[J]. 长江流域资源与环境, 2015, 24(12): 2038-2046.
[5] 蔡银莺,张安录. 江汉平原农地保护的外部效益研究[J]. 长江流域资源与环境, 2008, 17(1): 98-98.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 姜加虎,黄 群. 洞庭湖淤积、围垦对湖区江湖洪水影响的模拟[J]. 长江流域资源与环境, 2006, 15(5): 584 -587 .
[2] 胡明秀, 胡 辉, 王立兵. 武汉市工业“三废”污染状况计量模型研究[J]. 长江流域资源与环境, 2005, 14(4): 470 -474 .
[3] 张孝飞,林玉锁,俞 飞,李 波. 城市典型工业区土壤重金属污染状况研究[J]. 长江流域资源与环境, 2005, 14(4): 512 -515 .
[4] 周国忠,冯海霞. 浙江省旅游资源地区差异研究[J]. 长江流域资源与环境, 2006, 15(2): 157 -163 .
[5] 刘健,张奇. 一个新的分布式水文模型在鄱阳湖赣江流域的验证[J]. 长江流域资源与环境, 2009, 18(1): 19 .
[6] 叶 浩,濮励杰,张 健,涂小松. 快速城市化地区土地综合质量评价[J]. 长江流域资源与环境, 2008, 17(3): 366 .
[7] 胡茂林,吴志强,常剑波 . 鄱阳湖南矶山自然保护区鲤、鲫的随机扩增多态DNA分析[J]. 长江流域资源与环境, 2007, 16(3): 314 .
[8] 陈 华,郭生练,郭海晋,徐高洪,徐德龙. 汉江流域1951~2003年降水气温时空变化趋势分析[J]. 长江流域资源与环境, 2006, 15(3): 340 -345 .
[9] 李 彬,武 恒. 安徽省耕地资源数量变化及其对粮食安全的影响[J]. 长江流域资源与环境, 2009, 18(12): 1115 .
[10] 黄, 薇, 陈 进, 王 波. 梯级开发对河流径流过程和水温过程均化作用的研究[J]. 长江流域资源与环境, 2010, 19(03): 335 .