Created on Friday, 06 December 2013 13:05
More than 22,000 earth and space scientists, educators and students gather to present research and connect with colleagues.
The PAGE21 project and the scientific outcomes from the project so far are presented in various sessions in this years meeting.
AWI as the Coordinator has been invited to present the PAGE21 project in the session "Integration of International Arctic Research Programs and Data Streams From Polar Observatories, User Facilities, Data Collection Networks, and Field Campaigns II" on Wednesday December 11. Julia Boike will present the project.
She will also give a presention in a session "Hydrological Response to Climate Change in Permafrost Regions I" with a title "It's all about water: from small scale hydrologic processes in ice wedge polygonal tundra and thermokarst lakes to larger scale river runoff (Lena River Delta, Siberia)"
Ko Van Huissteden
from VUA will also present the PAGE21 project at a meeting of the Permafrost Carbon RCN meeting on Sunday, December 8th. In addition, Ko will give a presentation with a title "Rapid thaw pond formation in Northeast Siberia transfers permafrost carbon to the atmosphere" in the session "Vulnerability of Permafrost Carbon to Climate Change I". You can find his abstract in the abstract section on our website here
In addition, at least the following PAGE21 members will be presenting their research at AGU:
Shushi Peng from LGGE will give a presentation with a title "Simulated permafrost soil thermal dynamics during 1960-2009 in eight offline processed-based models" in the session "Vulnerability of Permafrost Carbon to Climate Change II".
Gustaf Hugelius from SU presents his research under a title "Assessing uncertainties in circumpolar permafrost carbon maps by comparing them to local scale studies" on Monday December 8 in a session "Vulnerability of Permafrost Carbon to Climate Change III"
Sarah Chadburn from UNEXE presents latest modelling outcomes in a poster titled "The effect of arctic mosses on the simulation of permafrost by the JULES land surface model" in the session on "Modeling of the Cryosphere: Energy and Mass Balance of Snow, Ice, and Permafrost I Posters"
Mathias Goeckede from MPG presents the research in Northeast Siberia in a poster titled "Long-term effects of drainage disturbance on the carbon cycle processes within a tussock tundra ecosystem in Northeast Siberia" in a session "Vulnerability of Permafrost Carbon to Climate Change IV Posters" on
Created on Tuesday, 03 December 2013 09:28
Tuesday, 3rd of December 2013
When we were planning to come to Cherskii for fall/winter flux measurements, many people asked us if the permafrost ecosystem would be active in the fall/winter, i.e. whether or not any gas emits from soil at below zero degrees.
The short answer is yes, and surprisingly even photosynthesis (CO2 consumption) occurs by some lichen species, even though it was neither observed at very cold temperatures like -30 degrees nor with a thick snow layer on the ground – sunlight will hardly pass through thick layer of snow pack.
Basically the environment observational setup to capture the fluxes is similar at any season, but one big difference that needs to be considered for the measurement strategy in winter season obviously is the presence of snow. To measure flux with chambers, some people remove snow from the ground and measure directly on the ground, while others put chambers on top of snow.
There are several other indirect methods but these two are widely used. The reason why some people remove snow is that snow can absorb/preserve gases and the flux measured on top of the snow might not represent "real time" flux emitted by the ecosystem (usually the signal is underestimated and delayed). Despite of this, we decided not to remove snow.
The main reason is to not destroy the chamber sites. We have specific chamber locations where some sensors/probes are permanently installed, which we plan to use long-term over the coming years. So if we remove snow, the soil temperature would be different from that of the surrounding environment that is still covered by snow since the snow is very important for insulation.
As a consequence, if wintertime soil temperature changes (drops) because of snow removal, the flux measurements including those within the following seasons, will be affected by different soil processes. Primarily flux (emission rate) can be lower than it should be because of lower temperature. Physical processes can also change the flux pattern – depending on how rapidly it freezes soil or how much the temperature fluctuates over time without insulation. Moreover, one of the objectives of our study is to compare/upscale the chamber data to eddy covariance data, so if we disturb the chamber sites, their representatives for comparing with the eddy data will be poor.
(Photo 1) One very interesting pattern we observed in our data sets so far is the occurrence of higher flux rates in some chamber sites where big tussocks prevent accumulation of a closed snow cover on the ground. These exposed tussock sites appear to be very important pathways for gas exchange with the atmosphere so we are excited to see this variation depending on snow cover among chamber sites. (Photo 2)
One good thing is that the snow depth is not very high in our site so this shallow snow layer is not influencing flux so much. Snow is also changing like sand in desert ecosystems sometimes. Snow was accumulating gradually every day when it snowed and it stayed almost the same for the next days. But one time strong wind blew and the next day all the tracks of sledge and marks of chambers were disappeared. This can also compensate our disturbance while visiting chambers.
Written by Min
Created on Friday, 22 November 2013 11:34
This time we have a pleasure to introduce another of PAGE21 modelers, Arsène Druel who works on a land surface model ORCHIDEE as a part of PAGE21 project.
Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE - Grenoble) / Laboratoire des Sciences du Climat et l'Environnement (LSCE - Paris)
I am a modeler and I study the boreal vegetation in the context of the past and future climate change. I work on a land surface model, ORCHIDEE
How is it affiliated with the PAGE21 project?
The permafrost is now implemented on ORCHIDEE, but no interaction with vegetation was integrated.
What is the current challenge within this topic?
One of my objectives is to identify the impacts of permafrost on the vegetation and add them in the model. In a second part I want to study the feedback of vegetation on permafrost.
How did it happen that you became a researcher?
I have study biology and ecology at the engineering school at Rennes. After some internships in research laboratory (SYKE in Finland, INRA in Rennes…) and first experiences in labs I choose to start a thesis.
Why do you like being the researcher?
For me, it is a opportunity to participate.
What do you like most in being a researcher?
The research and contact with the research community and the teaching activity.
How a typical working day looks like?
Never far from my computer. But without typical day.
What are your plans for the upcoming three / five years?
For me it is important to continue in the research. So after my PhD, I think postulate for a PostDoc.
Written by Arsene Durel
Created on Thursday, 14 November 2013 11:49
PAGE21 is being represented by Arctic Portal during the Day of the Arctic that has been taking place since this morning at Icelandic Marine Institute in Reykjavik, capital city of Iceland.
PAGE21 was presented as one of the most successful international projects related to Arctic research.
In general, the event was organized to promote environmental, international research, political, legal and economic cooperation between Iceland and the Arctic nations.
The event also created the platform for the discussion about problems and prospects of current development of the Arctic Region.
Alongside lectures and panel discussions, the Day of the Arctic opened a large scale platform for Arctic related commercial companies to present their northern operations.
The Day of the Arctic was organized jointly by the Icelandic – Arctic Cooperation Network, Stefansson Arctic Institute and RANNIS.
More information about the event is available in Icelandic on the webpage. For any specific inquiries, please contact Thorsteinn Gunnarsson on e - mail or tel: 00354 515 5800.
Created on Tuesday, 12 November 2013 09:50
Registration is now open for the CliC GTN-P ESA DUE Permafrost Workshop that has the objective to bring together the scientific permafrost communities and the producers of satellite data.
The 4th DUE Permafrost User Workshop will be held at ESA ESRIN, Frascati, Italy the 11-13 February 2014. It is sponsored by the Climate and Cryosphere Project (CliC) and Global Terrestrial Network for Permafrost of the International Permafrost Association (GTN-P/IPA) and the European Space Agency (ESA).
Deadline for funding applications (Young Scientist): 22 Nov 2013
Deadline for abstracts: 6 Dec 2013
Deadline for registration: 15 Jan 2013
This CliC GTNP ESA DUE Permafrost workshop:
• will bring together a multidisciplinary community working on permafrost-related remote sensing, field monitoring and permafrost-related modeling and climate modeling.
• will collect and discuss the up-to-date User requirements, validation approaches and the broadening range of applications.
• will contribute to the update of the IGOS Cryosphere Theme Report (2007) for permafrost.
• will feed into current efforts of GTN-P to build a permafrost observing component into the Sustaining Arctic Observing Network (SAON).
This meeting is open to all who are interested in attending. There will be no registration fee. Participants are invited to submit an abstract for an oral presentation or a poster.
A limited amount of travel support is available on a competitive basis for researchers from countries in economic transition and those early in their careers.
Early career is defined as current graduate students or those who have completed a Master's degree in the last 3 years or a PhD within the last 7 years. The submission of an abstract is required for all recipients of the travel awards.
The application is included in the workshop registration form found on the workshop webpage and must be completed by 22 November.
The workshop is jointly organized by CliC, ESA, and members of the former ESA DUE Permafrost team, Birgit Heim (AWI, DE), Annett Bartsch (APRI, AT & LMU, DE), Claude Duguay (UW, CA) Jenny Baseman (CliC), Vladimir Romanovsky (IPA/GTN-P) and Frank-Martin Seifert (ESA).
or visit the Workshop webpage