检索结果-南通市图书馆

Quantifying temporal changes in Tornionjoki river ice breakup dates and spring temperatures in lapland since 1802

Journal of Geographical Sciences 2013年第6期23卷 1069-1079页

作者： Samuli HELAMA Jianmin JIANG Johanna KORHONEN Jari HOLOPAINEN Mauri TIMONEN Finnish Forest Research Institute Rovaniemi Northern Unit 96300 Finland Training Centre of China Meteorological Administration Beijing 100081 China Finnish Environment Institute Helsinki P.O. Box 140 00251 Finland Department of Geosciences and Geography University of Helsinki Helsinki P.O. Box 64 00014 Finland

Cryophenological records （i.e. observational series of freeze and breakup dates of ice） are of great importance when assessing the environmental variations in cold regions. Here we employed the extraordinarily long observational records of river ice breakup dates and air temperatures in northern Fennoscandia to examine their interrelations since 1802. Historical observations, along with modern data, comprise the informational setting for this analysis carried out using t-test. Temperature history of April-May season was used as cli- matic counterpart for the breakup timings. Both records （temperature and breakup） showed seven sub-periods during which their local means were distinctly different relative to preced- ing and subsequent sub-periods. The starting and ending years of these sub-periods oc- curred in temporal agreement. The main findings of this study are summarized as follows：（1） the synchrony between the temperature and river ice breakup records ruled out the possibility that the changes would have occurred due to quality of the historical series （i.e. inhomoge- neity problems often linked to historical time-series）; （2） the studied records agreed to show lower spring temperatures and later river ice breakups during the 19th century, in comparison to the 20th century conditions, evidencing the prevalence of cooler spring temperatures in the study region, in agreement with the concept of the Little Ice Age （1570-1900） climate in North-West Europe; （3） the most recent sub-period demonstrate the highest spring tem- peratures with concomitantly earliest river ice breakups, showing the relative warmth of the current springtime climate in the study region in the context of the past two centuries; （4） the effects of anthropogenic changes in the river environment （e.g. construction and demolition of dams） during the 20th century should be considered for non-climatic variations in the breakup records; （5） this study emphasizes the importance of multi-centurial （i.

关键词： climatic change historical climatology lapland Little Ice Age phenology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

追逐北极光——拉普兰德(lapland)探险之旅

引用

科普童话 2016年第1期 49-49页

为了追逐世界上最美丽的北极光,一群来自英国,具有优秀极地技能的探险家们,聚集在芬兰的拉普兰德,用整整三个月的时间进行了一场北极拉力赛,在北极圈的心脏地区狩猎难以捉摸的北极光。让我们跟随他们一起冒险,见证下这美到令人窒息的北... 详细信息

为了追逐世界上最美丽的北极光,一群来自英国,具有优秀极地技能的探险家们,聚集在芬兰的拉普兰德,用整整三个月的时间进行了一场北极拉力赛,在北极圈的心脏地区狩猎难以捉摸的北极光。让我们跟随他们一起冒险,见证下这美到令人窒息的北极风光吧!

关键词：拉普兰北极圈 lapland

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：