Jarle W Bjerke

Biographic Data

ID5592676
NAMEJarle W Bjerke
GIVEN NAMESJarle W
FAMILY NAMEBjerke
SIGNATUREBJERKE J W
AFFILIATIONSNorwegian Institute for Nature Research
ORCID0000-0003-2721-1492
VERIFIEDYes
TOTAL WORKS14
TOTAL CITATIONS26
AUTHOR COUNT14
EDITOR COUNT0
FIRST PUBLICATION YEAR2011
LATEST PUBLICATION YEAR2025
H-INDEX2

  • Reconstructing the historical decline of lichen cover across the reindeer fence of the Finnish–Norwegian border

    Open AccessTuomo Wallenius, Jarle W Bjerke et al.ARTICLEAMBIO2025References: 49

    We analysed the history behind the current contrasting lichen covers of two adjacent reindeer herding districts at the Finnish–Norwegian border. We conducted vegetation field inventories across the border fence and reconstructed a lichen cover history from 1959 to 2020 using aerial and satellite images. The oldest images showed only a slight difference in lichen cover between the different sides of the border fence. Since the late 1950s, lichen c…

  • Policy documents considering biodiversity, land use, and climate in the European Arctic reveal visible, hidden, and imagined nexus approaches

    Open AccessSirpa Rasmu, Sirpa Rasmus et al.ARTICLEOne Earth2024

  • Variation in albedo and other vegetation characteristics in non-forested northern ecosystems: The role of lichens and mosses

    Open AccessEirik Aasmo Finne, Jarle W Bjerke et al.ARTICLEEnvironmental Research Letters2023

    Vegetation has a profound impact on climate through complex interactions and feedback loops, where especially regulation of albedo, the ratio of reflected to incoming solar radiation, is important at high latitudes. How vegetation albedo varies along environmental gradients in tundra ecosystems is still not well understood, particularly for ecosystems dominated by nonvascular vegetation. We studied broadband shortwave albedo of open boreal, arcti…

  • Extreme event impacts on CO 2 fluxes across a range of high latitude, shrub-dominated ecosystems

    Open AccessRachael Treharne, Jarle W Bjerke et al.ARTICLEEnvironmental Research Letters2020

    The Arctic is experiencing an increased frequency of extreme events which can cause landscape-scale vegetation damage. Extreme event-driven damage is an important driver of the decline in vegetation productivity (termed ‘Arctic browning’) which has become an increasingly important component of pan-Arctic vegetation change in recent years. A limited number of studies have demonstrated that event-driven damage can have major impacts on ecosystem CO…

  • Characteristics, drivers and feedbacks of global greening

    Open AccessShilong Piao, Xuhui Wang et al.ARTICLENature Reviews Earth & Environment2019

  • Vulnerability and resilience of the carbon exchange of a subarctic peatland to an extreme winter event

    Open AccessFrans‐Jan W Parmentier, Daniel P Rasse et al.ARTICLEEnvironmental Research Letters2018

    Extreme winter events that damage vegetation are considered an important climatic cause of arctic\nbrowning—a reversal of the greening trend of the region—and possibly reduce the carbon uptake of\nnorthern ecosystems. Confirmation of a reduction in CO2 uptake due to winter damage, however,\nremains elusive due to a lack of flux measurements from affected ecosystems. In this study, we report\neddy covariance fluxes of CO2 from a peatland in northe…

  • Combining modelling tools to evaluate a goose management scheme

    Open AccessJ M Baveco, Anne-Kari Bergjord et al.ARTICLEAMBIO2017Cited by: 6References: 35

    Many goose species feed on agricultural land, and with growing goose numbers, conflicts with agriculture are increasing. One possible solution is to designate refuge areas where farmers are paid to leave geese undisturbed. Here, we present a generic modelling tool that can be used to designate the best locations for refuges and to gauge the area needed to accommodate the geese. With a species distribution model, locations are ranked according to …

  • Snow season variability in a boreal-Arctic transition area monitored by Modis data

    Open AccessEirik Malnes, Stein Rune Karlsen et al.ARTICLEEnvironmental Research Letters2016

    The duration and extent of snow cover is expected to change rapidly with climate change. Therefore, \nthere is a need for improved monitoring of snow for the benefit of forecasting, impact assessments and \nthe population at large. Remotely sensed techniques prove useful for remote areas where there are few \nfield-based monitoring stations. This paper reports on a study of snow season using snow cover area \nfraction data from the two northernmo…

  • Changing Arctic snow cover: A review of recent developments and assessment of future needs for observations, modelling, and impacts

    Open AccessStef Bokhorst, Stine Højlund Pedersen et al.ARTICLEAMBIO2016

    Snow is a critically important and rapidly changing feature of the Arctic. However, snow-cover and snowpack conditions change through time pose challenges for measuring and prediction of snow. Plausible scenarios of how Arctic snow cover will respond to changing Arctic climate are important for impact assessments and adaptation strategies. Although much progress has been made in understanding and predicting snow-cover changes and their multiple c…

  • Low impact of dry conditions on the CO 2 exchange of a Northern-Norwegian blanket bog

    Open AccessMagnus Lund, Jarle W Bjerke et al.ARTICLEEnvironmental Research Letters2015

    Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra vulnerable to global warming since they require a positive water balance to sustain their moss dominated vegetation andCsink functioning. This study presents a 4.5 year record of land– atmosphere carbon dioxide (CO2) exchange from …

  • Impacts of snow season on ground-ice accumulation, soil frost and primary productivity in a grassland of sub-Arctic Norway

    Open AccessJarle W Bjerke, Hans Tømmervik et al.ARTICLEEnvironmental Research Letters2015

    Europe's and the World's northernmost agriculture is very vulnerable to harsh overwintering conditions. It is important from both an economic and societal standpoint to have accurate methods of predicting the severity and impact of the current snow season. Technology has advanced to enable such measurements to be regularly recorded but despite this, a detailed assessment, involving remote sensing , of the impacts of various types of snow season o…

  • Record-low primary productivity and high plant damage in the Nordic Arctic Region in 2012 caused by multiple weather events and pest outbreaks

    Open AccessJarle W Bjerke, Stein Rune Karlsen et al.ARTICLEEnvironmental Research Letters2014

    The release of cold temperature constraints on photosynthesis has led to increased productivity (greening) in significant parts (32–39%) of the Arctic, but much of the Arctic shows stable (57–64%) or reduced productivity (browning, <4%). Summer drought and wildfires are the best-documented drivers causing browning of continental areas, but factors dampening the greening effect of more maritime regions have remained elusive. Here we show how multi…

  • Ecosystem Response to Climatic Change: The Importance of the Cold Season

    Open AccessStef Bokhorst, Jarle W Bjerke et al.ARTICLEAMBIO2012Cited by: 2References: 48

  • Sámi traditional ecological knowledge as a guide to science: Snow, ice and reindeer pasture facing climate change

    Open AccessJan Åge Riseth, Hans Tømmervik et al.ARTICLEPolar Record2011Cited by: 18References: 42

    Scientific studies of challenges of climate change could be improved by including other sources of knowledge, such as traditional ecological knowledge (TEK), in this case relating to the Sámi. This study focuses on local variations in snow and ice conditions, effects of the first durable snow, and long term changes in snow and ice conditions as pre-requisites for understanding potential future changes. Firstly, we characterised snow types and pro…