A5087069366- Rheumatoid Arthritis Research and Therapies
- Remote Sensing in Agriculture
- Land Use and Ecosystem Services
- Remote Sensing and LiDAR Applications
- Species Distribution and Climate Change
- Spondyloarthritis Studies and Treatments
- Wildlife Ecology and Conservation
- Biosimilars and Bioanalytical Methods
- Systemic Lupus Erythematosus Research
- Autoimmune and Inflammatory Disorders Research
- Forest ecology and management
- Conservation, Biodiversity, and Resource Management
- Rangeland and Wildlife Management
- Forest Management and Policy
- Fire effects on ecosystems
- Urban Heat Island Mitigation
- Monoclonal and Polyclonal Antibodies Research
- Gout, Hyperuricemia, Uric Acid
- Cryospheric studies and observations
- Tree-ring climate responses
- Health Systems, Economic Evaluations, Quality of Life
- Inflammatory Bowel Disease
- Remote Sensing and Land Use
- Ecology and Vegetation Dynamics Studies
- Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
Diakonhjemmet Hospital
2018-2025
TerraMetrics (United States)
2018-2024
terraPulse, Inc. (United States)
2018-2024
Centers for Disease Control and Prevention
2022
University of Oslo
1999-2020
University of Maryland, College Park
2011-2019
Gaustad Hospital
2013
Duke University
2009-2012
Goddard Space Flight Center
2010-2012
Nordland Hospital
2011
We conducted an analysis of global forest cover to reveal that 70% remaining is within 1 km the forest's edge, subject degrading effects fragmentation. A synthesis fragmentation experiments spanning multiple biomes and scales, five continents, 35 years demonstrates habitat reduces biodiversity by 13 75% impairs key ecosystem functions decreasing biomass altering nutrient cycles. Effects are greatest in smallest most isolated fragments, they magnify with passage time. These findings indicate...
Abstract We developed a global, 30-m resolution dataset of percent tree cover by rescaling the 250-m MOderate-resolution Imaging Spectroradiometer (MODIS) Vegetation Continuous Fields (VCF) Tree Cover layer using circa- 2000 and 2005 Landsat images, incorporating MODIS Cropland Layer to improve accuracy in agricultural areas. Resulting Landsat-based estimates maintained consistency with VCF both epochs (RMSE =8.6% 11.9% 2005), but showed improved areas increased discrimination small forest...
The science and management of terrestrial ecosystems require accurate, high-resolution mapping surface water. We produced a global, 30-m-resolution inland water dataset with an automated algorithm using Landsat-based reflectance estimates, multispectral vegetation indices, terrain metrics, prior coarse-resolution masks. identified 3,650,723 km2 globally – nearly three quarters which was located in North America (40.65%) Asia (32.77%), followed by Europe (9.64%), Africa (8.47%), South...
Abstract The compilation of global Landsat data-sets and the ever-lowering costs computing now make it feasible to monitor Earth's land cover at resolutions 30 m. In this article, we describe methods create products forest change resolutions. Nevertheless, there are many challenges in ensuring creation high-quality products. And propose various ways which can be overcome. Among need for atmospheric correction, incorrect calibration coefficients some data-sets, different phenologies between...
Abstract Deforestation in the tropics is not only responsible for direct carbon emissions but also extends forest edge wherein trees suffer increased mortality. Here we combine high-resolution (30 m) satellite maps of cover with estimates effect and show that 19% remaining area tropical forests lies within 100 m a edge. The house around 50 million fragments length world’s edges sums to nearly km. Edge effects have caused an additional 10.3 Gt (2.1–14.4 Gt) emissions, which translates into...
Abstract Using a consistent, 20 year series of high‐ (30 m) resolution, satellite‐based maps forest cover, we estimate area and its changes from 1990 to 2010 in 34 tropical countries that account for the majority global humid forests. Our estimates indicate 62% acceleration net deforestation tropics 1990s 2000s, contradicting 25% reduction reported by United Nations Food Agriculture Organization Forest Resource Assessment. Net loss cover peaked 2000 2005. Gross gains accelerated slowly...
Historical baselines of forest cover are needed to understand the causes and consequences recent changes assess effectiveness land-use policies. However, historical assessment global distribution change has been lacking due obstacles in image acquisition, computational demands, lack retrospective reference data for classification. As limitations access imagery power overcome, possibility is increased an automated classification cover. We used locally fit trees relate hind-cast observations...
Abstract Global vegetation models predict rapid poleward migration of tundra and boreal forest in response to climate warming. Local plot air‐photo studies have documented recent changes high‐latitude composition structure, consistent with warming trends. To bridge these two scales inference, we analyzed a 24‐year (1986–2010) L andsat time series latitudinal transect across the forest‐tundra biome boundary northern Q uebec province, C anada. This region has experienced during both winter...
Abstract Tundra dominates two‐thirds of the unglaciated, terrestrial Arctic. Although this region has experienced rapid and widespread changes in vegetation phenology productivity over last several decades, specific climatic drivers responsible for change remain poorly understood. Here we quantified effect winter snowpack early spring temperature conditions on growing season (timing start, peak, end season) dominant tundra communities Arctic Alaska. We used daily remotely sensed normalized...
Fire is an integral component of ecosystems globally and a tool that humans have harnessed for millennia. Altered fire regimes are fundamental cause consequence global change, impacting people the biophysical systems on which they depend. As part newly emerging Anthropocene, marked by human-caused climate change radical changes to ecosystems, danger increasing, fires having increasingly devastating impacts human health, infrastructure, ecosystem services. Increasing vexing problem requires...
Objective To examine the association of body mass index (BMI) with pain in people hand osteoarthritis (OA), and explore whether this association, if causal, is mediated by systemic inflammatory biomarkers. Methods In 281 Nor‐Hand study participants, we estimated associations between BMI pain, as measured Australian/Canadian Osteoarthritis Hand Index (AUSCAN; range 0–20) Numerical Rating Scale (NRS; 0–10); foot NRS (range knee/hip Western Ontario McMaster Universities (WOMAC; 0–20); painful...
Land-cover change detection using satellite remote sensing is largely confined to the era of Landsat satellites, from 1972 present. However, Corona, Argon, and Lanyard intelligence satellites operated by U.S. government between 1960 have potential provide an important extension long-term record Earth's land surface. Recently declassified, archive images recorded these contains hundreds thousands photographs, many which very high ground resolution- 6–9 ft (1.8–2.7 m) even today's standards....
Rigorous monitoring of Earth's terrestrial surface requires mapping estimates land cover and their errors in space time. Estimation error land-cover change detection currently relies heavily on external, post hoc validation—i.e., comparison estimated to independent values that are assumed be true. However, reference data themselves uncertain, acquiring observations coincident with historical is often impossible. Complementarily, modeling the transmission, or propagation, through processes...