Torben R Christensen

Biographic Data

ID5970159
NAMETorben R Christensen
GIVEN NAMESTorben R
FAMILY NAMEChristensen
SIGNATURECHRISTENSEN T R
AFFILIATIONSLund University
ORCID0000-0002-4917-148X
VERIFIEDYes
TOTAL WORKS46
TOTAL CITATIONS115
WORKS AS AUTHOR46
WORKS AS EDITOR0
FIRST PUBLICATION YEAR1991
LATEST PUBLICATION YEAR2021
H-INDEX7

  • Climatic Factors Influencing the Anthrax Outbreak of 2016 in Siberia, Russia

    Open AccessEkaterina Ezhova, Dmitry Orlov et al.ARTICLEEcoHealth2021

    In 2016, an outbreak of anthrax killing thousands of reindeer and affecting dozens of humans occurred on the Yamal peninsula, Northwest Siberia, after 70 years of epidemiological situation without outbreaks. The trigger of the outbreak has been ascribed to the activation of spores due to permafrost thaw that was accelerated during the summer heat wave. The focus of our study is on the dynamics of local environmental factors in connection with the…

  • The missing pieces for better future predictions in subarctic ecosystems

    Open AccessYinan He, Didac Pascual et al.ARTICLEAMBIO2021References: 70

    Arctic and subarctic ecosystems are experiencing substantial changes in hydrology, vegetation, permafrost conditions, and carbon cycling, in response to climatic change and other anthropogenic drivers, and these changes are likely to continue over this century. The total magnitude of these changes results from multiple interactions among these drivers. Field measurements can address the overall responses to different changing drivers, but are les…

  • Multi-year data-model evaluation reveals the importance of nutrient availability over climate in arctic ecosystem C dynamics

    Open AccessEfrén López–Blanco, M Jackowicz-Korczyński et al.ARTICLEEnvironmental Research Letters2020

    Arctic tundra is a globally important store for carbon (C). However, there is a lack of reference sites characterising C exchange dynamics across annual cycles. Based on the Greenland Ecosystem Monitoring (GEM) programme, here we present 9–11 years of flux and ecosystem data across the period 2008–2018 from two wetland sites in Greenland: Zackenberg (74°N) and Kobbefjord (64°N). The Zackenberg fen was a strong C sink despite its higher latitude a…

  • Key indicators of Arctic climate change

    Open AccessJason E Box, William Colgan et al.ARTICLEEnvironmental Research Letters2019

    Key observational indicators of climate change in the Arctic, most spanning a 47 year period demonstrate fundamental changes among nine key elements of the Arctic system. We find that, coherent with increasing air temperature, there is an intensification of the hydrological cycle, evident from increases in humidity, precipitation, river discharge, glacier equilibrium line altitude and land ice wastage. Downward trends continue in sea ice thicknes…

  • Potential future methane emission hot spots in Greenland

    Open AccessMarilena Geng, Jens Hesselbjerg Christensen et al.ARTICLEEnvironmental Research Letters2018

    Climate models have been making significant progress encompassing an increasing number of complex feedback mechanisms from natural ecosystems. Permafrost thaw and subsequent induced greenhouse gas emissions, however, remain a challenge for climate models at large. Deducing permafrost conditions and associated greenhouse gas emissions from parameters that are simulated in climate models would be a helpful step towards estimating emission budgets f…

  • Postscript

    Open AccessTorben R Christensen, Elmer Topp-Jørgensen et al.ARTICLEAMBIO2017References: 1

    As documented with examples in this special issue of Ambio, the Greenland Ecosystem Monitoring (GEM) Programme in its first 20 years has focused on both detailed and very comprehensive studies of specific ecosystems in order to monitor and understand ecosystem patterns and processes. An international review of GEM conducted in 2015 praised the programme for its comprehensiveness, but also saw an untapped potential for a wider use of GEM data and …

  • A synthesis of the arctic terrestrial and marine carbon cycles under pressure from a dwindling cryosphere

    Open AccessFrans-Jan W Parmentier, Frans‐Jan W Parmentier et al.ARTICLEAMBIO2017References: 126

    The current downturn of the arctic cryosphere, such as the strong loss of sea ice, melting of ice sheets and glaciers, and permafrost thaw, affects the marine and terrestrial carbon cycles in numerous interconnected ways. Nonetheless, processes in the ocean and on land have been too often considered in isolation while it has become increasingly clear that the two environments are strongly connected: Sea ice decline is one of the main causes of th…

  • Toward a statistical description of methane emissions from arctic wetlands

    Open AccessNorbert Pirk, Mikhail Mastepanov et al.ARTICLEAMBIO2017Cited by: 1References: 42

    Methane (CH 4 ) emissions from arctic tundra typically follow relations with soil temperature and water table depth, but these process-based descriptions can be difficult to apply to areas where no measurements exist. We formulated a description of the broader temporal flux pattern in the growing season based on two distinct CH 4 source components from slow and fast-turnover carbon. We used automatic closed chamber flux measurements from NE Green…

  • Focus on the impact of climate change on wetland ecosystems and carbon dynamics

    Open AccessLei Meng, Nigel T Roulet et al.ARTICLEEnvironmental Research Letters2016

    The renewed growth in atmospheric methane (CH4) since 2007 after a decade of stabilization has drawn much attention to its causes and future trends. Wetlands are the single largest source of atmospheric CH4. Understanding wetland ecosystems and carbon dynamics is critical to the estimation of global CH4 and carbon budgets. After approximately 7 years of CH4 related research following the renewed growth in atmospheric CH4, Environmental Research L…

  • Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire

    Open AccessBenjamin W Abbott, Jeremy B Jones et al.ARTICLEEnvironmental Research Letters2016

    As the permafrost region warms, its large organic carbon pool will be increasingly vulnerable to decomposition, combustion, and hydrologic export. Models predict that some portion of this release will be offset by increased production of Arctic and boreal biomass; however, the lack of robust estimates of net carbon balance increases the risk of further overshooting international emissions targets. Precise empirical or model-based assessments of t…

  • Large herbivore grazing affects the vegetation structure and greenhouse gas balance in a high arctic mire

    Open AccessJulie Maria Falk, Niels M Schmidt et al.ARTICLEEnvironmental Research Letters2015

    Herbivory is an important part of most ecosystems and affects the ecosystems' carbon balance both directly and indirectly. Little is known about herbivory and its impact on the carbon balance in high arctic mire ecosystems. We hypothesized that trampling and grazing by large herbivores influences the vegetation density and composition and thereby also the carbon balance. In 2010, we established fenced exclosures in high arctic Greenland to preven…

  • Rescuing Valuable Arctic Vegetation Data for Biodiversity Models, Ecosystem Models and a Panarctic Vegetation Classification

    Open AccessDonald A Walker, Inger G Alsos et al.ARTICLEARCTIC2013

    TEST 02 - Elsevier's Scopus, the largest abstract and citation database of peer-reviewed literature. Search and access research from the science, technology, medicine, social sciences and arts and humanities fields

  • Rapid responses of permafrost and vegetation to experimentally increased snow cover in sub-arctic Sweden

    Open AccessMargareta Johansson, Terry V Callaghan et al.ARTICLEEnvironmental Research Letters2013

    Increased snow depth already observed, and that predicted for the future are of critical importance to many geophysical and biological processes as well as human activities. The future characteristics of sub-arctic landscapes where permafrost is particularly vulnerable will depend on complex interactions between snow cover, vegetation and permafrost. An experimental manipulation was, therefore, set up on a lowland peat plateau with permafrost, in…

  • Effects of drought conditions on the carbon dioxide dynamics in a temperate peatland

    Open AccessMagnus Lund, Torben R Christensen et al.ARTICLEEnvironmental Research Letters2012

    Drought is arguably the most important regulator of inter-annual variation in net ecosystem CO exchange (NEE) in peatlands. This study investigates effects of drought periods on NEE and its components, gross primary production (GPP) and ecosystem respiration (R), on the basis of eddy covariance measurements of land-atmosphere exchange of CO in 2006-2009 in a south Swedish nutrient-poor peatland. Two drought periods had dissimilar effects on the C…

  • Monitoring the Multi-Year Carbon Balance of a Subarctic Palsa Mire with Micrometeorological Techniques

    Open AccessTorben R Christensen, M Jackowicz-Korczyński et al.ARTICLEAMBIO2012Cited by: 2References: 34

  • The Man, the Myth, the Legend

    Open AccessMargareta Johansson, Christer Jonasson et al.ARTICLEAMBIO2012Cited by: 2References: 13

  • Post Scriptum

    Open AccessTorben R Christensen, Margareta Johansson et al.ARTICLEAMBIO2012

  • Environmental Monitoring and Research in the Abisko Area—An Overview

    Open AccessChrister Jonasson, Mats Sonesson et al.ARTICLEAMBIO2012Cited by: 3References: 63

  • Multiple Effects of Changes in Arctic Snow Cover

    Open AccessTerry V Callaghan, Margareta Johansson et al.ARTICLEAMBIO2011Cited by: 7References: 76

  • Multi-Decadal Changes in Tundra Environments and Ecosystems

    Open AccessTerry V Callaghan, C E Tweedie et al.ARTICLEAMBIO2011Cited by: 6References: 63

  • Plant and Vegetation Dynamics on Disko Island, West Greenland

    Open AccessTerry V Callaghan, Torben R Christensen et al.ARTICLEAMBIO2011Cited by: 5References: 39

  • Past and Present Permafrost Temperatures in the Abisko Area

    Open AccessMargareta Johansson, Jonas Akerman et al.ARTICLEAMBIO2011Cited by: 2References: 17

  • The carbon budget of the northern cryosphere region

    Open AccessA D McGuire, Robie W Macdonald et al.ARTICLECurrent Opinion in Environmental…2010Cited by: 1

  • Ecological Dynamics Across the Arctic Associated with Recent Climate Change

    Open AccessEric Post, Mads C Forchhammer et al.ARTICLEScience2009

    Assessing the Arctic The Arctic is experiencing some of the most rapid climate change currently under way across the globe, but consequent ecological responses have not been widely reported. At the close of the Fourth International Polar Year, Post et al. (p. 1355 ) review observations on ecological impacts in this sensitive region. The widespread changes occurring in terrestrial, freshwater, and marine systems, presage changes at lower latitudes…

  • What Determines the Current Presence or Absence of Permafrost in the Torneträsk Region, a Sub-arctic Landscape in Northern Sweden

    Margareta Johansson, Torben R Christensen et al.ARTICLEAMBIO2006Cited by: 4References: 29

    In a warming climate, permafrost is likely to be significantly reduced and eventually disappear from the sub-Arctic region. This will affect people at a range of scales, from locally by slumping of buildings and roads, to globally as melting of permafrost will most likely increase the emissions of the powerful greenhouse gas methane, which will further enhance global warming. In order to predict future changes in permafrost, it is crucial to unde…