[口头报告]Quantitative Reconstruction of Precipitation since the Last Glacial Maximum in the Lake Fuxian Catchment, Central Yunnan

Quantitative Reconstruction of Precipitation since the Last Glacial Maximum in the Lake Fuxian Catchment, Central Yunnan
编号:1086 稿件编号:3643 访问权限:私有 更新:2023-04-20 21:54:09 浏览:218次 口头报告

报告开始:2023年05月06日 15:45 (Asia/Shanghai)

报告时间:8min

所在会议:[1B] 1B、第四纪地质与全球变化 » [1B-1] 1B-1 第四纪地质与全球变化

暂无文件

摘要
Indian summer monsoon (ISM), an important component of the South Asian climate system, has a great influence on the precipitation in Southwest China, especially Yunnan. An extremely weak or strong monsoon can have disastrous effects. An improved understanding of long-term variability in the ISM would thus be immensely beneficial. Pollen analysis of a 906-cm core taken from Lake Fuxian in central Yunnan was conducted to reconstruct vegetation and precipitation during the past 24 700 years in the lake catchment. Pine and evergreen broadleaved forests occupied the lake catchment during the last glacial period, when weak ISM brought less precipitation (with average MAP (mean annual precipitation) of 828 mm and precipitation of 693 mm in rainy season) to the basin. During the last deglaciation period, pine forests shrank and evergreen broadleaved forests expanded, indicating the intensification of the ISM and thus to bring more precipitation (average MAP of 965 mm and precipitation of 821 mm in rainy season) to the lake catchment. During the climate optimum period of the Holocene from 10300 to 4900 cal. yr. BP, vegetation was still dominated by pine and evergreen broadleaved forests, but the latter contained more tree species favoring warm and moist conditions such as Ulmus, Pterocarya and Liquidambar, implying the Holocene strongest monsoon as well as most monsoonal precipitation. At this period, average MAP and precipitation in rainy season were 1165 and 997 mm, about 355 and 327 mm higher than the present values, respectively. During the late Holocene from 4900 cal. yr. BP to present, vegetation was dominated by pines and herbs of Poaceae and Artemisia, reflecting a decreasing trend of precipitation due to weakening ISM. The average MAP and precipitation in rainy season at 4900 cal. yr. BP were 814 and 683 mm comparable with their modern observational values, implying that the modern ISM system has been established since then.
 
关键字
Indian Summer Monsoon; Lake Fuxian; Pollen; Vegetation; Mean annual precipitation; precipitation in rain season
报告人
王敏
云南师范大学

稿件作者
孙启发 云南师范大学
王敏 云南师范大学
蒙红卫 云南师范大学
黄林培 云南师范大学
张虎才 云南大学
沈才明 云南师范大学
发表评论
验证码 看不清楚,更换一张
全部评论

联系我们

会务总协调、疫情防控:

沈焕锋(13163235536;shenhf@whu.edu.cn)

管小彬(18007973663;guanxb@whu.edu.cn)

魏秀琴(15871750333;weixiuqin@whu.edu.cn)

会场安排:

沈焕锋(13163235536;shenhf@whu.edu.cn)

李长冬(15327198910;lichangdong2008@126.com)

张 亮(15827200707;lzhang@whigg.ac.cn)

徐 鹏(13554674258;xupengwhu@whu.edu.cn)

学术安排:

王伦澈(13349889828;wang@cug.edu.cn)

庄艳华(13349889826;zhuang@apm.ac.cn)

李星华(15527964369;lixinghua5540@whu.edu.cn)

会议注册:

管小彬(18007973663;guanxb@whu.edu.cn)

赵 林(18071070948;linzhao@whu.edu.cn)

会议财务:

张传喜(13627137374;zhangchuanxi@whu.edu.cn)

石玉婷(13476286537;yutingshi@vip.qq.com)

商业赞助:

阮志敏(15871826028;ruanzm@whu.edu.cn)

黄文丽(13693626212;wenli.huang@whu.edu.cn)

会议服务,酒店预定,网站、注册系统服务:

曹雪峰(18971567453;carol@chytey.com)

金钰壹(18271358859;jinyuyi@whu.edu.cn)

会务总协调、疫情防控:
沈焕锋(13163235536;shenhf@whu.edu.cn)
管小彬(18007973663;guanxb@whu.edu.cn)
魏秀琴(15871750333;weixiuqin@whu.edu.cn)
会场安排:
沈焕锋(13163235536;shenhf@whu.edu.cn)
李长冬(15327198910;lichangdong2008@126.com)
张 亮(15827200707;lzhang@whigg.ac.cn)
徐 鹏(13554674258;xupengwhu@whu.edu.cn)
学术安排:
王伦澈(13349889828;wang@cug.edu.cn)
庄艳华(13349889826;zhuang@apm.ac.cn)
李星华(15527964369;lixinghua5540@whu.edu.cn)
会议注册:
管小彬(18007973663;guanxb@whu.edu.cn)
赵 林(18071070948;linzhao@whu.edu.cn)
会议财务:
张传喜(13627137374;zhangchuanxi@whu.edu.cn)
石玉婷(13476286537;yutingshi@vip.qq.com)
商业赞助:
阮志敏(15871826028;ruanzm@whu.edu.cn)
黄文丽(13693626212;wenli.huang@whu.edu.cn)
会议服务,酒店预定,网站、注册系统服务:
曹雪峰(18971567453;carol@chytey.com)
金钰壹(18271358859;jinyuyi@whu.edu.cn)
注册缴费 提交稿件