• JUser: :_load: Unable to load user with ID: 137

logo image for top of page

a core project of
2018WCRPspon col July2018 01 1

Y Iijima: Permafrost degradation in the central Yakutia detected by ALOS images


This presentation was held at the DUE Permafrost 2014 workshop, 12th of Febuary 2014, Frascati, Italy


Iijima, Yoshihiro
Research Institute for Global Change, JAMSTEC, Yokosuka Japan

Large increase in precipitation had continued since 2004 in the central Yakutia. Soil moisture during following years had been increased accompanying with thawing permafrost near the surface. The perennially waterlogged conditions exacerbated the boreal forest habitat, namely withered and dead trees widely extended in this region. The present study examined to extract permafrost and forest degradation due to the unexpected climate-driven damages, along with expansion of the wet surface area, using ALOS–PALSAR and AVNIR2 images taken during 2006 through 2009. Classification of water surface area by PALSAR images and boreal forest change by AVNIR2 images produced the multi-years change in forest due to waterlogged conditions. The analyses exhibited that water surface area expanded in alas lakes and along valleys in conjunction with change from forest to grassland well corresponding with the field observation results.

Keywords: Permafrost degradation, ecohydrology, boreal forest, thermokarst





2008-01 No. 10 Ice and Climate News
(Media / 2008-01 No. 10 Ice and Climate News)
- CliC Scientific Steering Group (comings and goings) - Atmosphere-Ocean General Circulation Models - Global Prediction: Permafrost - Operational Sea-Ice Analysis and Forecasting at - Arctic Council Climate and Cryosphere Project - Seasonal Forecast of Antarctic Sea Ice - The Global...
2009-06 No. 12 Ice and Climate News
(Media / 2009-06 No. 12 Ice and Climate News)
- Integration across cryosphere disciplines - New CliC SSG members - Norway/China collaborations - Brazil update - Water resources and cryosphere in mountains and N. Canada - CliC-related IPY activities in Russia - Progress in Chinese cryospheric research - The carbon permafrost initiative -...
2010-05 No. 14 Ice and Climate News
(Media / 2010-05 No. 14 Ice and Climate News)
- CliC SSG-VI Meeting Summary - Update on Global Sea-level Rise - New 50-year Time Series of Freshwater Fluxes from Greenland - Cryosat-2 Launched - Land- and Sea-ice Properties in Antarctica: Bridging the Gap - Early Career Scientists Corner - Russian CliC Activities

View all

Back to Top