Welcome to LUCCI!
Lund University Centre
for studies of Carbon Cycle and Climate Interactions
LUCCI is a research centre at Lund University devoted to studies of the carbon cycle and how it interacts with the climate system. The centre involves about 120 researchers from four Lund university departments: Physical Geography and Ecosystem Science, Geology,Biology and Physics.
Semi-arid ecosystems key areas in carbon cycling
Anders Ahlstöm and Ben Smith, together with colleagues, has a new publication in Science; "The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink". The findings from the international study may be surprising - the semi-arid ecosystems such as savannahs and shrublands, play a vital role in the global carbon cycling.
Rainforests are still absorbing more carbon dioxide from the atmosphere as they are more productive, but they are already crowded and not increasing their photosynthesis much. Ahlströms study shows that the semi-arid ecosystems actually dominate the variations between the wet and dry years, as well as the increase of carbon uptake by terrestrial areas. The findings are of great importance for land conservation and climate policy decisions.
Research on large grazers in the Arctic highlighted
Photo: Julie M. Falk
Julie Maria Falk with co-authors Niels Martin Schmidt (Aarhus University), Torben R. Christensen and Lena Ström have a paper selected as a monthly highlight paper - "a collection of papers published throughout the year that have been specially selected by our editors for their particular significance, advances made within the field, multidisciplinary interest and scientific impact" in Environmental Research Letters.
Further, their research on the effects of large grazing herbivores on the vegetation composition and carbon balance in the Arctic is being referred to in an article in ERL Perspective:"Grazing in Arctic pealands - an unknown agent in the global carbon budget". The authors of the article refers to the work by Falk et al as to highlight the potential of grazers in the Arctic to alter ecosystem processes, a subject that is largely uninvestigated but could have the potential to act as a major player in the carbon budget globally.
Highlighted paper: (Julie Maria Falk et al 2015 Environ. Res. Lett.) Large herbivore grazing affects the vegetation structure and greenhouse gas balance in a high arctic mire
Perspective article (Stark and Ylänne): Grazing in Arctic peatlands—an unknown agent in the global carbon budget
LUCCI seminar tomorrow
Chiara Molinari from WP 5 will hold the presentation "Main dynamics and drivers of boreal forests fire regimes during the Holocene".
The importance of icebergs for North Atlantic cold events
Svante Björck is interviewed by Swedish Radio (SR) on account of an article in Nature by Stephen Barker et al.: Icebergs not the trigger for North Atlantic cold events (10.1038/nature14330). Before it was believed that the melting of icebergs caused the currents in the ocean to change, which led to a change in temperature. The researchers have now found that icebergs may form after the cold event started, and hence icebergs are not the triggers.
- One can wonder what roll icebergs and sea ice has in the disturbance of the North Atlantic circulation. And this study shows that maybe they do not matter so much, says Svante Björck to SR.
This is something that may have to be incorporated in the climate models, he suggests. Svante also says that water from melting glaciers probably will have more impact on rea currents than the icebergs in the future.
Raimund Muscheler installed as Professor of Quaternary Sciences
Raimund Muscheler, sharing the leadership of WP 3 in LUCCI, was on Friday 13th of March installed a a Professor of Quaternary Sciences. His research is focused on solar activity and climate, in particular on cosmogenic radionuclides in ice cores, lake sediments and tree rings.
Water usage in plants - Nature article
A new global study on plants and water is published this week in Nature Climate Change. LUCCI scientist Maj-Lena Linderson is co-author.
Plants swop water against carbon - every litre of water they use from the soil, they can use to take up a couple of grams of carbon to grow. A new global study published this week in Nature Climate Change shows that plants are wise in their water usage. They are adapted to the environment they live in and how accessible water is in that environment, and has created different strategies on how economic they must be in their water usage.
The study calculated how much additional water is required for plants to enable them to take up another gram of carbon for their growth. The hypothesis was that the relationship between water use and carbon uptake is constant for a given species, but that there is a variety between species, as they usually grow in different environments. The studies of the different ecosystems showed that plants generally have adapted their strategies on how they use water to the environment, but that there are also outliers. Savannah trees that typically grow in hot and dry area, are relatively lavish with water.
This study gives us information about how plants have adapted to the environment they grow in. If we know how they work today, we can better understand the relationship between the environment, climate and plants in the future.
Main author: Yan-Shih Lin, Macquarie University NSW, Australia.
2015-01-14: The R3I group now has new leaders in Niklas Olén and Ylva Persson. They start their shared leadership immediately since former leader Claire McKay finished in the end of December. LUCCI members will soon hear more from Niklas and Ylva.
You can always find more LUCCI-related news on our News page!