Ingibjörg S. Jónsdóttir
A5019764565- Climate change and permafrost
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Botany and Plant Ecology Studies
- Ecology and Vegetation Dynamics Studies
- Rangeland and Wildlife Management
- Lichen and fungal ecology
- Polar Research and Ecology
- Indigenous Studies and Ecology
- Species Distribution and Climate Change
- Soil Carbon and Nitrogen Dynamics
- Botany, Ecology, and Taxonomy Studies
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Wildlife Ecology and Conservation
- Rangeland Management and Livestock Ecology
- Geological and Geochemical Analysis
- Tree-ring climate responses
- Bryophyte Studies and Records
- Arctic and Antarctic ice dynamics
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Planetary Science and Exploration
- Plant and animal studies
University of Iceland
2016-2025
University Centre in Svalbard
2004-2021
Ecological Society of America
2020
John Wiley & Sons (United States)
2020
Agricultural University of Iceland
2007-2019
University of Hawaiʻi at Mānoa
2017
University of Alaska Fairbanks
2017
La Trobe University
2006
Pacific Northwest Research Station
2006
University of British Columbia
2006
Recent observations of changes in some tundra ecosystems appear to be responses a warming climate. Several experimental studies have shown that plants and can respond strongly environmental change, including warming; however, most were limited single location short duration based on variety designs. In addition, comparisons among are difficult because techniques been used achieve different measurements assess responses. We metaanalysis plant community from standardized experiments at 11...
Ecology Letters (2011) Abstract Understanding the sensitivity of tundra vegetation to climate warming is critical forecasting future biodiversity and feedbacks climate. In situ experiments accelerate change on a small scale forecast responses local plant communities. Limitations this approach include apparent site‐specificity results uncertainty about power short‐term studies anticipate longer term change. We address these issues with synthesis 61 experimental studies, up 20 years duration,...
The International Tundra Experiment (ITEX) is a collaborative, multisite experiment using common temperature manipulation to examine variability in species response across climatic and geographic gradients of tundra ecosystems. ITEX was designed specifically arctic alpine increased temperature. We compiled from one four years experimental data 13 different sites used meta-analysis analyze responses plant phenology, growth, reproduction warming. Results indicate that key phenological events...
Abstract Whether climate change will turn cold biomes from large long‐term carbon sinks into sources is hotly debated because of the great potential for ecosystem‐mediated feedbacks to global climate. Critical are direction, magnitude and generality responses plant litter decomposition. Here, we present first quantitative analysis major climate‐change‐related drivers decomposition rates in northern worldwide. Leaf litters collected predominant species 33 manipulation experiments...
The 39-day long eruption at the summit of Eyjafjallajökull volcano in April–May 2010 was modest size but ash widely dispersed. By combining data from ground surveys and remote sensing we show that erupted material 4.8±1.2·1011 kg (benmoreite trachyte, dense rock equivalent volume 0.18±0.05 km3). About 20% lava water-transported tephra, 80% airborne tephra (bulk 0.27 km3) transported by 3–10 km high plumes. mostly fine (diameter <1000 µm). At least 7·1010 (70 Tg) very (<28 µm), several times...
Inference about future climate change impacts typically relies on one of three approaches: manipulative experiments, historical comparisons (broadly defined to include monitoring the response ambient fluctuations using repeat sampling plots, dendroecology, and paleoecology techniques), space-for-time substitutions derived from along environmental gradients. Potential limitations all approaches are recognized. Here we address congruence among these main by comparing degree which tundra plant...
Warmer temperatures are accelerating the phenology of organisms around world. Temperature sensitivity might be greater in colder, higher latitude sites than warmer regions, part because small changes temperature constitute relative thermal balance at colder sites. To test this hypothesis, we examined up to 20 years data for 47 tundra plant species 18 high-latitude along a climatic gradient. Across all species, timing leaf emergence and flowering was more sensitive given increase summer...
Snow is an important driver of ecosystem processes in cold biomes. accumulation determines ground temperature, light conditions, and moisture availability during winter. It also affects the growing season’s start end, plant access to nutrients. Here, we review current knowledge snow cover’s role for vegetation, plant-animal interactions, permafrost microbial processes, biogeochemical cycling. We compare studies natural gradients with experimental manipulation assess time scale difference...
Abstract Arctic and alpine tundra ecosystems are large reservoirs of organic carbon 1,2 . Climate warming may stimulate ecosystem respiration release into the atmosphere 3,4 The magnitude persistency this stimulation environmental mechanisms that drive its variation remain uncertain 5–7 This hampers accuracy global land carbon–climate feedback projections 7,8 Here we synthesize 136 datasets from 56 open-top chamber in situ experiments located at 28 arctic sites which have been running for...
The rapidly warming temperatures in high-latitude and alpine regions have the potential to alter phenology of Arctic plants, affecting processes ranging from food webs ecosystem trace gas fluxes. International Tundra Experiment (ITEX) was initiated 1990 evaluate effects expected rapid changes temperature on tundra plant phenology, growth community using experimental warming. Here, we used ITEX control data test phenological responses background variation across sites spanning latitudinal...
Abstract Environmental manipulation studies are integral to determining biological consequences of climate warming. Open Top Chambers ( OTC s) have been widely used assess summer warming effects on terrestrial biota, with their during other seasons normally being given less attention even though chambers often deployed year‐round. In addition, temperature extremes and freeze‐thaw events poorly documented. To provide robust documentation the microclimatic influences s throughout year, we...
The effusive six months long 2014-2015 Bárðarbunga eruption (31 August-27 February) was the largest in Iceland for more than 200 years, producing 1.6 ± 0.3 km 3 of lava.The total SO 2 emission 11 5 Mt, amount emitted from Europe 2011.The ground level concentration exceeded 350 µg m -3 hourly average health limit over much days to weeks.Anomalously high concentrations were also measured at several locations September.The lowest pH fresh snowmelt site 3.3, and 3.2 precipitation 105 away...
Abstract Rapid climate warming is altering Arctic and alpine tundra ecosystem structure function, including shifts in plant phenology. While the advancement of green up flowering are well-documented, it remains unclear whether all phenophases, particularly those later season, will shift unison or respond divergently to warming. Here, we present largest synthesis our knowledge experimental effects on phenology from International Tundra Experiment. We examine effect a suite season-wide...
Abstract The Arctic is warming twice as fast the rest of planet, leading to rapid changes in species composition and plant functional trait variation. Landscape-level maps vegetation distributions are required expand spatially-limited plot studies, overcome sampling biases associated with most accessible research areas, create baselines from which monitor environmental change. Unmanned aerial vehicles (UAVs) have emerged a low-cost method generate high-resolution imagery bridge gap between...