Direct observations of ice seasonality reveal changes in climate over the past 320–570 years

Scientific Reports
By: , and 

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Abstract

Lake and river ice seasonality (dates of ice freeze and breakup) responds sensitively to climatic change and variability. We analyzed climate-related changes using direct human observations of ice freeze dates (1443–2014) for Lake Suwa, Japan, and of ice breakup dates (1693–2013) for Torne River, Finland. We found a rich array of changes in ice seasonality of two inland waters from geographically distant regions: namely a shift towards later ice formation for Suwa and earlier spring melt for Torne, increasing frequencies of years with warm extremes, changing inter-annual variability, waning of dominant inter-decadal quasi-periodic dynamics, and stronger correlations of ice seasonality with atmospheric CO2 concentration and air temperature after the start of the Industrial Revolution. Although local factors, including human population growth, land use change, and water management influence Suwa and Torne, the general patterns of ice seasonality are similar for both systems, suggesting that global processes including climate change and variability are driving the long-term changes in ice seasonality.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Direct observations of ice seasonality reveal changes in climate over the past 320–570 years
Series title Scientific Reports
DOI 10.1038/srep25061
Volume 6
Year Published 2016
Language English
Publisher Nature
Description e25061: 11 p.
Country Finland, Japan
Other Geospatial Lake Suwa, Torne River
Online Only (Y/N) N
Additional Online Files (Y/N) N