Category Archives: Climate

Statistics, climate research and applications

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International Convention Center, Jeju

Between 24th and 28th June, an international meeting on statistical climatology (IMSC) was held in Jeju Island, Republic of Korea. The meeting is one of the largest in the field and is held every third year. Well over 200 researchers participated, including three from the Division of Atmospheric Sciences. The research field itself is very wide, covering several climate research topics which involve the use of statistical methods and their application to (often) large/complicated datasets used in climate research. As a general description, “The aim of IMSC is to promote good statistical practice in the atmospheric and climate sciences and to maintain and enhance the lines of communication between the atmospheric and statistical science communities.”

The Earth’s climate system is very complicated, involving myriads of processes many of which are poorly known. However, climate research is not only about to understand the underlying processes. The analysis of existing data also has several issues related to it, involving related expertise and experience. This is emphasized by the ever-growing amount of geodata, comprising both observations and model simulations. Nowadays, it has become common for research projects to freely distribute the produced data for all interested users who then can exploit it for their personal research purposes. In this way, the data developers can also get more feedback from the data users and the outcome eventually has benefits to both parties. Indeed, research methods used in natural sciences are fundamentally more data-oriented today than a few decades ago. While progress in science also requires production of new data, for many applications there already exists a wealth of data which is far from being comprehensively analyzed.

As climate in any specific place can eventually be described as averaged weather, the conventional variables familiar from everyday weather forecasts (whether observed or modelled: surface temperature, precipitation, wind speed, humidity, …) have also a very important role in climate research and in any applications related to it. This is emphasized by the fact that these surface variables are the most meaningful for most of the climate data users, in their own right and as an input for impact studies. Some of the most important questions to ask by anyone planning to apply any adaptive measures in order to prepare for changing climatic conditions are:

“How much is it likely for temperature and precipitation to change at my location during the 21st century?” “What will happen to precipitation intensity in the future?” “How sensitive is my crop to droughts and will their frequency increase?” “How will river discharges change and what are the related uncertainty intervals?” “How important it actually is to get the future climate simulations right for my application?” Indeed, societal interface is very close to many of the applications in the field – many sectors are sensitive to climate and weather. Without the field of applied climatology, much of the precious scientific basic research about process understanding would not be translated at all for numerous societal applications. This happens through climate predictions done with global/regional climate models: the overarching aim in large parts of geoscientific research is to improve future climate predictions by studying the actual processes and eventually implementing them as a part of a climate model.

The simulations of climate models are distributed to the users by some means, which is far from being a straightforward copy-and-paste activity. Many of the problems have no simple answer, but still desperately need to be assessed as they have a large importance in climate prediction. An honest scientific interpretation of the future climate predictions requires understanding of relevant processes affecting climate in any specific place (defined possibly by the user), statistical knowledge, and multidisciplinary interest from the people working at the science-society-policy interface. All of this emphasizes the importance of diverse research environment and knowledge that can integrate and condense information into better products and simultaneously facilitate adaptive decisions of the end-users by offering decent decision-support advice and products for them.

We cannot just build our fancy climate models indefinitely, but we also have to use them in practice. The impact-related research on the division helps climate data users to apply climate predictions better for their problems and therefore eventually facilitate their adaptive decisions. The importance of climate services is evermore growing, emphasizing the need to develop good practices and guidance for interpreting and using climate data. Without this kind of research, the interface between the climate science community and actual decision makers will deteriorate. Whatever impacts will be caused by changing climate, estimating them also involves the use of climate models. As a science community, we need to have credible methods and tools to be able to serve users and the wider society.

One poster session was held on each day


Jussi S. Ylhäisi
Jouni Räisänen
Olle Räty

Climate research group

Building ICOS RI: Integrated Carbon Observation System Research Infrastructure

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logotransparent ICOSThe perturbed global biogeochemical cycles of the greenhouse gases are a major driving force of current and future climate change. The IPCC has concluded that a large part of the observed rise of global temperature is very likely due to increasing greenhouse gases in the atmosphere, driven by man-made emissions overtaking the natural cycles of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). Deeper understanding of the driving forces of climate change requires full quantification of the greenhouse gas emissions and sinks and their evolution. The mission of ICOS RI is to enable research to understand the greenhouse gas budgets and perturbations. ICOS RI will

  • track carbon fluxes in Europe and adjacent regions by monitoring the ecosystems, the atmosphere and the oceans through integrated networks,
  • provide the long-term observations required to understand the present state and predict future behavior of the global carbon cycle and greenhouse gas emissions,
  • monitor and assess the effectiveness of carbon sequestration and/or greenhouse gases emission reduction activities on global atmospheric composition levels, including attribution of sources and sinks by region and sector.

Leading the negotiations to establish the European ICOS organization has been one of the major efforts of the division, together with the FMI, for the last couple of years. At the same time the Finnish national station network to monitor the greenhouse gas has been upgraded and built to match the ICOS standards. ICOS is currently in the transitional phase between the preparatory phase project and ICOS ERIC (European Research Infrastructure Consortium). The leader of the transitional phase is prof Timo Vesala. ICOS Director General recruitment process is going on and the new DG should start in the Head Office by the end of this year.

The structure of ICOS RI consists of the following parts:

  • Organized ICOS National Networks (such as ICOS-Finland, http://www.icos-infrastructure.fi)
  • ICOS Central Facilities (including Atmospheric Thematic Centre, Ecosystem Thematic Centre, Ocean Thematic Centre, Central Analytical Laboratory),
  • Its European legal entity, ICOS ERIC, including the Head Office and Carbon Portal. ICOS ERIC is the European legal entity to manage the activities of ICOS RI. ICOS ERIC is responsible for coordination, management, scientific, strategic and technical planning, and outreach of ICOS RI.

The Head Office of the ICOS ERIC legal entity and coordination of the ICOS RI is in Helsinki, Finland.

ICOS ERIC application has been submitted by the Finland’s permanent representation to the EU to the European Commission for step 1 evaluation in 21.6.2013. The EC will assess the application to ensure its compliance with the requirements of the ERIC Regulation. Four to five independent experts will assist the Commission in its assessment of the application’s compliance regarding the necessity, added value, access, mobility, knowledge transfer and dissemination of the RI. The next step will commence in autumn and include the signature process between the member and observer countries. ICOS ERIC is planned to be established early 2014.

Kuvankaappaus 2013-6-26 kello 12.15.01More information at: http://icos-infrastructure-transition.eu

Marjut Kaukolehto

OpenIFS – a leading model of atmospheric dynamics

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Dr Sinclair (right) at the OpenIFS meeting.

Dr Sinclair (right) at the OpenIFS meeting.

Professor Heikki Järvinen and researcher Victoria Sinclair use the numerical weather forecast model OpenIFS, recently released by the European Centre for Medium-Range Weather Forecasts (ECMWF), in their teaching and research.  OpenIFS is an open version of the IFS system currently in use at ECMWF for operational weather forecasting.  IFS is the leading model in its field: it has excellent forecasting ability for more than 6 days on average (measured by an 80% anomaly correlation limit) and was able to predict the track of superstorm Sandy as many as 7.5 days before the storm struck New York. The main competitors of the IFS are the Met Office and NCAR numerical forecast models.

In early June, Prof Järvinen and Dr Sinclair organised a 3-day workshop at the University of Helsinki for users to discuss OpenIFS model and its future prospects. Hands-on tutorials were organized with help of ECMWF staff at the computer rooms of the Physicum. All participants ran the model at the CSC’s CRAY supercomputer and analysed the results with the Metview visualization tools.

Prof Järvinen is a happy user of OpenIFS: “We are one of the first universities to have a licence for OpenIFS. With the OpenIFS, we can study questions about atmospheric dynamics that are both relevant and inspiring for the students. OpenIFS represents top-end science and there is potential for societal impact though its operational use. In our division, we have strong expertise in GHG, aerosols, and atmospheric processes, but OpenIFS also gives an opportunity to study marine aspects, which is on our agenda as well. In addition, by educating our students to use and understand numerical weather forecast models, we provide them job-relevant skills which can be easily applied to the use of Earth system models.”

The Division of Atmospheric Sciences has a commitment to develop a cutting-edge numerical meteorology laboratory course, and OpenIFS is an ideal tool for that. “I think OpenIFS is right for us and provides rich opportunities. It is relatively easy to use and it has a multitude of research applications. It is modern, modular, well documented, and computationally extremely efficient. There are also excellent training opportunities at ECMWF and within the OpenIFS community”, says professor Järvinen.

Victoria Sinclair’s initial experience of using OpenIFS for research has been positive. “I started working with OpenIFS in January and all went well from the start; my aim was to use it to understand how weather systems transport moisture to the interior of Antarctica by means of case studies, sensitivity experiments, and by analysing large-scale dynamics. I also wanted to calculate moisture budgets and to use the model in teaching synoptic meteorology”, Victoria says. “I think OpenIFS is a very good tool for a teacher to explain how weather systems work.”

Victoria found OpenIFS practical and easy to use. “IFS is a state-of-the-art numerical weather prediction model and well known internationally. It is computationally efficient, and as a global model, there are no difficult lateral boundary conditions. One simulation may have more than one use; furthermore, I can study both polar regions at once. IFS is well tested and well documented; as a European model, it is also more acceptable for some European funding agencies than American models.”

What about weak points? “Well, there are relatively few academic users at the moment, and this limits the sources of help and advice. If I have a problem with something, it is unlikely that someone else has ended up in the same situation before outside ECMWF. Also, the output is not that user friendly. I changed from IFS’s plotting programme, Metview to Matlab at some point, although Metview definitely has lots of potential. I just need to invest some time to learn how to use it.“

In summary, Prof Järvinen and Dr Sinclair think that OpenIFS is a very promising project for researchers, and for teaching, but that there is still quite a lot of room for improvement, especially in terms of user-friedliness.Prof Järvinen (left) at the OpenIFS meeting.

Tanja Suni, Heikki Järvinen, Victoria Sinclair

More information about ECMWF, IFS, and OpenIFS

http://www.ecmwf.int/
http://www.ecmwf.int/research/ifs/
https://software.ecmwf.int/wiki/display/OIFS/OpenIFS+Home

Climate and air quality research onboard a zeppelin

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16052013608Since the beginning of May 2013, a zeppelin has been flying over southern Finland. The zeppelin was brought to Finland as part of a European project PEGASOS to measure aerosol particles and trace gases in the lowest layers of atmosphere up to about 1.5 km.

As part of PEGASOS (Pan-European Gas-AeroSOls-climate interactions Study), an international group of scientists studies the effect of human emissions to climate change. Last summer research flights with the zeppelin were carried out in polluted areas in Central and Southern Europe. This time, we measure in Finland where the air is cleaner, anthropogenic emissions smaller, and biogenic effects more important.

In Finland 30 scientists, 10 technicians and 2 pilots operate the zeppelin and the instruments it is carrying. While in Finland, the zeppelin is stationed at Jämijärvi airport and the flights are mostly directed between Jämijärvi and Hyytiälä or around Jämijärvi.

The “flying laboratory” build in the zeppelin is equipped with state-of-art scientific instruments specially designed to investigate aerosol particles and trace gases. The instruments are divided into three cabin layouts and only one can fly at a time. Each of the layouts has a specific scientific focus point: new particle formation, photochemistry, and secondary organic aerosol – together covering a wide range of atmospheric physics and chemistry.

The zeppelin complements the extensive ground-based measurements and airplane measurements carried out in the planetary boundary layer. This airship offers a unique combination of capabilities which is not available when employing other aircrafts. The airship can stay at nearly fixed position, making it possible to follow time development of various events, such as industrial emissions or particles from natural sources. On the other hand, the airship can change height quickly and operate also at low altitudes which allows for measurement of the vertical profiles of trace compounds with high time resolution, also at the lowest hundreds meter above ground.

The research flights will continue until mid-June 2013. So far, the measurements have given new information about atmospheric mixing and layering as well as transportation of particles and gases in the atmosphere and detailed information on spatial variation of fine particles and gases from natural and human made sources.

Hanna Manninen & Taina Yli-Juuti

Blog for the EU PEGASOS Project:
http://eu-pegasos.blogspot.fi/

PEGASOS Project home page:
http://pegasos.iceht.forth.gr/

 

The future of the Arctic

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In September 2012, Arctic sea ice cover declined to a record low, over 3 million square kilometers below the long-term average for the month. Photo: IIASA Newsletter

IIASA researchers and Finnish policymakers and scientists met in May to outline a new research agenda addressing the challenges facing the Arctic region.

The seminar, jointly organized by IIASA, The Finnish Prime Minister’s Office, and the Academy of Finland, brought together stakeholders to share views, discuss and clarify the kind of Arctic research that is most needed to help guide the region through an uncertain future. Prof Markku Kulmala took part in the meeting, giving a Finnish view on climate change issues. Other speakers included Prof Pavel Kabat, Director of the International Institute for Applied Systems Analysis IIASA, Austria; Ambassador Hannu Halinen, Arctic Affairs at the Finnish Ministry for Foreign Affairs; Minister Counsellor, Deputy Head of Mission, Ulrik Tideström, Embassy of Sweden in Helsinki; Special Adviser Christine Daae Olseng, Coordinator for the Polar Research Programme, the Research Council of Norway; Senior Vice President and Chief Techology Officer Kari Knuutila, Outotec Oyj, Finland; Director Teija Tiilikainen, Finnish Institute of International Affairs, Finland; and Dr., Researcher Seija Tuulentie, Finnish Forest Research Institute.

“The meeting was an important step in establishing a real, efficient and useful dialogue between policy makers and scientists. Our Division is involved in many such efforts because we find it is in the best interest of society in every respect”, says Prof Kulmala.

Climate change has hit the Arctic region harder than any location on Earth. Over the last 30 years, the sea ice that covers the Arctic Ocean has declined by over 40% in summer, opening up new routes for shipping and making oil extraction and fishing more feasible in previously impassable waters. In the same time period, average temperatures have risen twice as fast in the Arctic as in lower latitudes. The resulting thawing of permafrost can undermine infrastructure, and the climate shifts may disrupt marine and terrestrial ecosystems, as well as the cultures that depend on them.

These changes open up new economic opportunities for resource extraction, shipping, and tourism in Arctic countries, but also pose many new questions about how to guide sustainable economic development and avoid environmental damage.

IIASA researchers focus on many issues relevant to the Arctic, including energy resources, air quality, and fisheries. The Institute also integrates scientific analyses into the assessment of policy options and future scenarios, a function that could be vital in the rapidly changing region, which is becoming ever more important on the global economic and geopolitical stage.

The meeting was webcast. For more information, visit the Academy of Finland Web site: http://www.aka.fi/arctic2013.

Tanja Suni
Adapted from IIASA Newsletter, Issue 14, June 2013