John T Abatzoglou
Datos Biográficos
| ID | 6016183 |
|---|---|
| NOMBRE | John T Abatzoglou |
| NOMBRES | John T |
| APELLIDO | Abatzoglou |
| FIRMA | ABATZOGLOU J T |
| AFILIACIONES | University of California, Merced |
| ORCID | 0000-0001-7599-9750 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 36 |
| TOTAL DE CITAS | 14 |
| TOTAL COMO AUTOR | 36 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2013 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 3 |
Enso’s influence on co-occurring hot-dry and hot-wet extremes across global croplands
The El Niño Southern Oscillation (ENSO) is a key driver of global climate variability. Through its teleconnections, ENSO influences precipitation and temperature worldwide, yet its influence on compound extremes across agricultural systems is less well explored. Here, we examine ENSO’s influence on co-occurring hot-dry (HD) and hot-wet (HW) extreme events across global croplands, given their potential risks for food production. HD events can inte…
Spatial and temporal changes in wildfires and their attributes across the western United States
It is widely perceived that wildfire activity has increased across the western United States (WUS), with studies generally focusing on large wildfires. This study examines changes in the number of wildfire ignitions and burned area in the WUS using a comprehensive record of more than 750,000 wildfire incidents from 1992 to 2020 across biophysical gradients, seasons, and ignition causes. It further analyzes the environmental conditions associated …
Shorter growing seasons may moderate climate change effects on crop water demands
Rising evaporative demand (ETo) with a warming climate contributes to diminished water availability in water-stressed agricultural regions globally. While increased ETo typically necessitates increased irrigation, we explore how crop phenological response can moderate this challenge. Focusing on five key agricultural crops in California’s San Joaquin Valley (SJV), we employ coupled water balance and phenology models to project crop water demands …
High-resolution mountain topography can inform global snow vulnerability estimates
Snow is changing globally. Computationally intensive snow reanalysis products and downscaled climate model projections allow for the estimation of historical and projected changes in snow over ∼4–10 km resolutions, but these resolutions are coarse relative to the scales needed for water supply and flood planning. Fine-scale digital elevation models (DEMs) are widely available but are underutilized to make first-order assessments of snow vulnerabi…
Ignition matters
Seasonal forecasts have sufficient skill to inform some agricultural decisions
Seasonal forecasts, which look several months into the future, are currently underutilized in active decision-making, particularly for agricultural and natural resource management. This underutilization can be attributed to the absence of forecasts for decision-relevant variables at the required spatiotemporal resolution and at the time when the decisions are made and a perception of poor skill by decision-makers. Addressing these constraints, we…
Coupling fire and energy in the Anthropocene
Extreme events such as wildfires and winter storms result in disruptions to grid-based electricity delivery. Electricity supply disruptions are both reactive, whereby specific events cause damage to physical infrastructure, or anticipatory where electricity suppliers—namely electric utility companies—preemptively de-energize sections of an electrical grid or distribution network based on elevated potential of extreme conditions that may cause wil…
Spring Snowpack Influences on the Volume and Timing of Spring and Peak-Season Overnight Visitation to Yosemite Wilderness
Wilderness visitation, particularly overnight use, is reactive to climate variability because backpackers face greater exposure to and dependence on environmental conditions. This study examines the effect that spring snowpack had on the timing and volume of permits issued for overnight use of the Yosemite Wilderness during peak and shoulder-season months (April–October) from 2002 to 2019. We categorize 1 April snowpack at Tuolumne Meadows into s…
Quantifying the contribution of major carbon producers to increases in vapor pressure deficit and burned area in western US and southwestern Canadian forests
Increases in burned forest area across the western United States and southwestern Canada over the last several decades have been partially driven by a rise in vapor pressure deficit (VPD), a measure of the atmosphere’s drying power that is significantly influenced by human-caused climate change. Previous research has quantified the contribution of carbon emissions traced back to a set of 88 major fossil fuel producers and cement manufacturers to …
Human and infrastructure exposure to large wildfires in the United States
Global and Regional Trends and Drivers of Fire Under Climate Change
Recent wildfire outbreaks around the world have prompted concern that climate change is increasing fire incidence, threatening human livelihood and biodiversity, and perpetuating climate change. Here, we review current understanding of the impacts of climate change on fire weather (weather conditions conducive to the ignition and spread of wildfires) and the consequences for regional fire activity as mediated by a range of other bioclimatic facto…
Quantifying the impact of future extreme heat on the outdoor work sector in the United States
Outdoor workers perform critical societal functions, often despite higher-than-average on-the-job risks and below-average pay. Climate change is expected to increase the frequency of days when it is too hot to safely work outdoors, compounding risks to workers and placing new stressors on the personal, local, state, and federal economies that depend on them. After quantifying the number of outdoor workers in the contiguous United States and their…
Efficacy of the global protected area network is threatened by disappearing climates and potential transboundary range shifts
Protected areas are essential to conserving biodiversity, yet changing climatic conditions challenge their efficacy. For example, novel and disappearing climates within the protected area network indicate that extant species may not have suitable climate in protected areas in the future. Further, potential transboundary range shifts, those that involve movement from one country to another, are also challenging because physical (e.g. fencing) and …
Future increases in lightning ignition efficiency and wildfire occurrence expected from drier fuels in boreal forest ecosystems of western North America
Lightning-induced fire is the primary disturbance agent in boreal forests. Recent large fire years have been linked to anomalously high numbers of lightning-caused fire starts, yet the mechanisms regulating the probability of lightning ignition remain uncertain and limit our ability to project future changes. Here, we investigated the influence of lightning properties, landscape characteristics, and fire weather on lightning ignition efficiency—t…
Contrasting the role of human- and lightning-caused wildfires on future fire regimes on a Central Oregon landscape
Climate change is expected to increase fire activity in many regions of the globe, but the relative role of human vs. lightning-caused ignitions on future fire regimes is unclear. We developed statistical models that account for the spatiotemporal ignition patterns by cause in the eastern slopes of the Cascades in Oregon, USA. Projected changes in energy release component from a suite of climate models were used with our model to quantify changes…
Vegetation fires in the Anthropocene
Population exposure to pre-emptive de-energization aimed at averting wildfires in Northern California
Recent extreme fire seasons in California have prompted utilities such as Pacific Gas and Electric to pre-emptively de-energize portions of the electrical grid during periods of extreme fire weather to reduce the risk of powerline-related fire ignitions. The policy was deployed in 2019, resulting in 12 million person-days of power outages and widespread societal disruption. Retrospective weather and vegetation moisture data highlight hotspots of …
How climate change and fire exclusion drive wildfire regimes at actionable scales
Extreme wildfires are increasing in frequency globally, prompting new efforts to mitigate risk. The ecological appropriateness of risk mitigation strategies, however, depends on what factors are driving these increases. While regional syntheses attribute increases in fire activity to both climate change and fuel accumulation through fire exclusion, they have not disaggregated causal drivers at scales where land management is implemented. Recent a…
Climate change is increasing the likelihood of extreme autumn wildfire conditions across California
California has experienced devastating autumn wildfires in recent years. These autumn wildfires have coincided with extreme fire weather conditions during periods of strong offshore winds coincident with unusually dry vegetation enabled by anomalously warm conditions and late onset of autumn precipitation. In this study, we quantify observed changes in the occurrence and magnitude of meteorological factors that enable extreme autumn wildfires in …
Fire-catalyzed vegetation shifts in ponderosa pine and Douglas-fir forests of the western United States
Increased wildfire activity combined with warm and dry post-fire conditions may undermine the mechanisms maintaining forest resilience to wildfires, potentially causing ecosystem transitions, or fire-catalyzed vegetation shifts. Stand-replacing fire is especially likely to catalyze vegetation shifts expected from climate change, by killing mature trees that are less sensitive to climate than juveniles. To understand the vulnerability of forests t…
Observed Impacts of Anthropogenic Climate Change on Wildfire in California
Recent fire seasons have fueled intense speculation regarding the effect of anthropogenic climate change on wildfire in western North America and especially in California. During 1972–2018, California experienced a fivefold increase in annual burned area, mainly due to more than an eightfold increase in summer forest‐fire extent. Increased summer forest‐fire area very likely occurred due to increased atmospheric aridity caused by warming. Since t…
Planning for Idaho’s waterscapes
Water availability and use are increasingly critical factors determining the resilience and vulnerability of communities in the Western United States (US). Historical water availability and use in the state of Idaho is synthesized by considering the biophysical drivers of climate and surface runoff alongside human drivers of land-use, hydrologic engineering and state water management and policies. Idaho has not experienced chronic water scarcity …
Human–environmental drivers and impacts of the globally extreme 2017 Chilean fires
TerraClimate, a high-resolution global dataset of monthly climate and climatic water balance from 1958–2015
We present TerraClimate, a dataset of high-spatial resolution (1/24°, ~4-km) monthly climate and climatic water balance for global terrestrial surfaces from 1958–2015. TerraClimate uses climatically aided interpolation, combining high-spatial resolution climatological normals from the WorldClim dataset, with coarser resolution time varying (i.e., monthly) data from other sources to produce a monthly dataset of precipitation, maximum and minimum t…
The role of perceptions versus instrumented data of environmental change
Human–environmental drivers and impacts of the globally extreme 2017 Chilean fires
Coupling fire and energy in the Anthropocene
Extreme events such as wildfires and winter storms result in disruptions to grid-based electricity delivery. Electricity supply disruptions are both reactive, whereby specific events cause damage to physical infrastructure, or anticipatory where electricity suppliers—namely electric utility companies—preemptively de-energize sections of an electrical grid or distribution network based on elevated potential of extreme conditions that may cause wil…
Adaptation with climate uncertainty
Human and infrastructure exposure to large wildfires in the United States
The role of perceptions versus instrumented data of environmental change
Development of gridded surface meteorological data for ecological applications and modelling
Landscape‐scale ecological modelling has been hindered by suitable high‐resolution surface meteorological datasets. To overcome these limitations, desirable spatial attributes of gridded climate data are combined with desirable temporal attributes of regional‐scale reanalysis and daily gauge‐based precipitation to derive a spatially and temporally complete, high‐resolution (4‐km) gridded dataset of surface meteorological variables required in eco…
Modeling very large-fire occurrences over the continental United States from weather and climate forcing
Very large-fires (VLFs) have widespread impacts on ecosystems, air quality, fire suppression resources, and in many regions account for a majority of total area burned. Empirical generalized linear models of the largest fires (>5000 ha) across the contiguous United States (US) were developed at 60 km spatial and weekly temporal resolutions using solely atmospheric predictors. Climate-fire relationships on interannual timescales were evident, with…
Indicators of Climate Change in Idaho
Climate change is well documented at the global scale, but local and regional changes are not as well understood. Finer, local- to regional-scale information is needed for creating specific, place-based planning and adaption efforts. Here the development of an indicator-focused climate change assessment in Idaho is described. This interdisciplinary framework couples end users’ data needs with observed, biophysical changes at local to regional sca…
Impact of anthropogenic climate change on wildfire across western US forests
Significance Increased forest fire activity across the western United States in recent decades has contributed to widespread forest mortality, carbon emissions, periods of degraded air quality, and substantial fire suppression expenditures. Although numerous factors aided the recent rise in fire activity, observed warming and drying have significantly increased fire-season fuel aridity, fostering a more favorable fire environment across forested …
Controls on interannual variability in lightning-caused fire activity in the western US
Lightning-caused wildfires account for a majority of burned area across the western United States (US), yet lightning remains among the more unpredictable spatiotemporal aspects of the fire environment and a challenge for both modeling and managing fire activity. A data synthesis of cloud-to-ground lightning strikes, climate and fire data across the western US from 1992 to 2013 was conducted to better understand geographic variability in lightnin…
How will climate change affect wildland fire severity in the western US
Fire regime characteristics in North America are expected to change over the next several decades as a result of anthropogenic climate change. Although some fire regime characteristics (e.g., area burned and fire season length) are relatively well-studied in the context of a changing climate, fire severity has received less attention. In this study, we used observed data from 1984 to 2012 for the western United States (US) to build a statistical …
Projected changes in cold hardiness zones and suitable overwinter ranges of perennial crops over the United States
Average annual absolute minimum temperatures (TN _n ) provide a means of delineating agriculturally relevant climate zones and are used to define cold hardiness zones (CHZ) by the United States Department of Agriculture. Projected changes in TN _n , mean winter minimum temperatures, and CHZs over the conterminous United States (CONUS) were assessed using an ensemble of statistically downscaled daily climate model output through the mid 21st centu…
Human exposure and sensitivity to globally extreme wildfire events
Human-started wildfires expand the fire niche across the United States
Significance Fighting wildfires in the United States costs billions of dollars annually. Public dialog and ongoing research have focused on increasing wildfire risk because of climate warming, overlooking the direct role that people play in igniting wildfires and increasing fire activity. Our analysis of two decades of government agency wildfire records highlights the fundamental role of human ignitions. Human-started wildfires accounted for 84% …
The 2015 drought in Washington State
Washington State experienced widespread drought in 2015 and the largest burned area in the observational record, attributable in part to exceptionally low winter snow accumulation and high summer temperatures. We examine 2015 drought severity in the Cascade and Olympic mountains relative to the historical climatology (1950-present) and future climate projections (mid-21st century) for a mid-range global greenhouse gas emissions scenario. Although…
TerraClimate, a high-resolution global dataset of monthly climate and climatic water balance from 1958–2015
We present TerraClimate, a dataset of high-spatial resolution (1/24°, ~4-km) monthly climate and climatic water balance for global terrestrial surfaces from 1958–2015. TerraClimate uses climatically aided interpolation, combining high-spatial resolution climatological normals from the WorldClim dataset, with coarser resolution time varying (i.e., monthly) data from other sources to produce a monthly dataset of precipitation, maximum and minimum t…
The role of perceptions versus instrumented data of environmental change
Adaptation with climate uncertainty
Observed Impacts of Anthropogenic Climate Change on Wildfire in California
Recent fire seasons have fueled intense speculation regarding the effect of anthropogenic climate change on wildfire in western North America and especially in California. During 1972–2018, California experienced a fivefold increase in annual burned area, mainly due to more than an eightfold increase in summer forest‐fire extent. Increased summer forest‐fire area very likely occurred due to increased atmospheric aridity caused by warming. Since t…
Planning for Idaho’s waterscapes
Water availability and use are increasingly critical factors determining the resilience and vulnerability of communities in the Western United States (US). Historical water availability and use in the state of Idaho is synthesized by considering the biophysical drivers of climate and surface runoff alongside human drivers of land-use, hydrologic engineering and state water management and policies. Idaho has not experienced chronic water scarcity …
Human–environmental drivers and impacts of the globally extreme 2017 Chilean fires
Vegetation fires in the Anthropocene
Population exposure to pre-emptive de-energization aimed at averting wildfires in Northern California
Recent extreme fire seasons in California have prompted utilities such as Pacific Gas and Electric to pre-emptively de-energize portions of the electrical grid during periods of extreme fire weather to reduce the risk of powerline-related fire ignitions. The policy was deployed in 2019, resulting in 12 million person-days of power outages and widespread societal disruption. Retrospective weather and vegetation moisture data highlight hotspots of …
How climate change and fire exclusion drive wildfire regimes at actionable scales
Extreme wildfires are increasing in frequency globally, prompting new efforts to mitigate risk. The ecological appropriateness of risk mitigation strategies, however, depends on what factors are driving these increases. While regional syntheses attribute increases in fire activity to both climate change and fuel accumulation through fire exclusion, they have not disaggregated causal drivers at scales where land management is implemented. Recent a…
Climate change is increasing the likelihood of extreme autumn wildfire conditions across California
California has experienced devastating autumn wildfires in recent years. These autumn wildfires have coincided with extreme fire weather conditions during periods of strong offshore winds coincident with unusually dry vegetation enabled by anomalously warm conditions and late onset of autumn precipitation. In this study, we quantify observed changes in the occurrence and magnitude of meteorological factors that enable extreme autumn wildfires in …
Fire-catalyzed vegetation shifts in ponderosa pine and Douglas-fir forests of the western United States
Increased wildfire activity combined with warm and dry post-fire conditions may undermine the mechanisms maintaining forest resilience to wildfires, potentially causing ecosystem transitions, or fire-catalyzed vegetation shifts. Stand-replacing fire is especially likely to catalyze vegetation shifts expected from climate change, by killing mature trees that are less sensitive to climate than juveniles. To understand the vulnerability of forests t…
Contrasting the role of human- and lightning-caused wildfires on future fire regimes on a Central Oregon landscape
Climate change is expected to increase fire activity in many regions of the globe, but the relative role of human vs. lightning-caused ignitions on future fire regimes is unclear. We developed statistical models that account for the spatiotemporal ignition patterns by cause in the eastern slopes of the Cascades in Oregon, USA. Projected changes in energy release component from a suite of climate models were used with our model to quantify changes…
Global and Regional Trends and Drivers of Fire Under Climate Change
Recent wildfire outbreaks around the world have prompted concern that climate change is increasing fire incidence, threatening human livelihood and biodiversity, and perpetuating climate change. Here, we review current understanding of the impacts of climate change on fire weather (weather conditions conducive to the ignition and spread of wildfires) and the consequences for regional fire activity as mediated by a range of other bioclimatic facto…
Quantifying the impact of future extreme heat on the outdoor work sector in the United States
Outdoor workers perform critical societal functions, often despite higher-than-average on-the-job risks and below-average pay. Climate change is expected to increase the frequency of days when it is too hot to safely work outdoors, compounding risks to workers and placing new stressors on the personal, local, state, and federal economies that depend on them. After quantifying the number of outdoor workers in the contiguous United States and their…
Efficacy of the global protected area network is threatened by disappearing climates and potential transboundary range shifts
Protected areas are essential to conserving biodiversity, yet changing climatic conditions challenge their efficacy. For example, novel and disappearing climates within the protected area network indicate that extant species may not have suitable climate in protected areas in the future. Further, potential transboundary range shifts, those that involve movement from one country to another, are also challenging because physical (e.g. fencing) and …
Environmental Science (32 obras) · Geography (28 obras) · Climate change (27 obras) · Fire effects on ecosystems (23 obras) · Climatology (19 obras) · Ecology (17 obras) · Physical geography (13 obras) · Fire regime (12 obras) · Geology (12 obras) · Ecosystem (11 obras)