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USDA; algorithms; cropland; environmental assessment; food security; normalized difference vegetation index; precision agriculture; reflectance; spatial data; time series analysis; California; South Dakota
Abstract:
... The 30 m resolution U.S. Department of Agriculture (USDA) crop data layer (CDL) is a widely used crop type map for agricultural management and assessment, environmental impact assessment, and food security. A finer resolution crop type map can potentially reduce errors related to crop area estimation, field size characterization, and precision agriculture activities that requires crop growth infor ...
... Diatom, pollen, silicoflagellate, and biogenic opal analyses from a 155 cm-long gravity core from Pioneer Seamount, offshore Santa Cruz, California (PS1410-06 GC, latitude 37.3°N, longitude 123.4°W, water depth 2165 m) are compiled for the last ~11,300 years and compared with those of ODP 1019 and TN062-O550 from northern California. The relative abundance record of the subtropical diatom Fragilar ...
... BACKGROUND: Almonds are an important crop in California, and increased yields necessitate that dried in‐hull almonds are stored in the field for longer periods, increasing the potential for postharvest moisture exposure (e.g., rain, fog). Processors are increasingly drying these ‘wet’ almonds to a moisture content of <6% using low heat before the hulling and shelling process in order to reduce mec ...
... Medium-range (1–15 day) precipitation forecasts are increasingly available from global weather models. This study presents evaluation of the Global Forecast System (GFS) for the Volta river basin in West Africa. The evaluation was performed using two satellite-gauge merged products: NASA’s Integrated Multi-satellitE Retrievals (IMERG) “Final Run” satellite-gauge merged rainfall observations, and t ...
USDA Forest Service; algorithms; case studies; data collection; environmental management; forest management; forests; prescribed burning; rangelands; remote sensing; satellites; sustainable forestry; time series analysis; California
Abstract:
... An essential component of sustainable forest management is accurate monitoring of forest activities. Although monitoring efforts have generally increased for many forests throughout the world, in practice, effective monitoring is complex. Determining the magnitude and location of progress towards sustainability targets can be challenging due to diverse forest operations across multiple jurisdictio ...
active ingredients; acute toxicity; adjuvants; almonds; application rate; boscalid; ecotoxicology; exposure pathways; honey; honey bees; industry; insecticides; mortality; propiconazole; pyraclostrobin; solar radiation; California
Abstract:
... Beekeepers report significant honey bee deaths during and after almond bloom. These losses pose a major problem for the California almond industry because of its dependence on honey bees as pollinators. The present study aimed to determine if combinations of pesticides applied during almond bloom during daylight hours were a possible explanation for these losses. In this study we aimed to mimic th ...
earthquakes; evolution; geophysics; models; research; support vector machines; tectonics; California; New Zealand
Abstract:
... Earthquake catalogs are essential to analyze the evolution of active fault systems. The background seismicity rate, or rate of earthquakes that are not directly triggered by other earthquakes, directly relates to the stressing rate, a crucial quantity for understanding the seismic hazards. Determining the background seismicity rate is challenging because aftershock sequences may dominate the seism ...
climate; climate change; data collection; drought; income; politics; runoff; snowpack; water conservation; California; Southwestern United States
Abstract:
... Under a changing climate, droughts are projected to increase in frequency and duration in the Southwestern USA. Between 2012 and 2016, California experienced one of the region’s worst droughts, with record high temperatures and low snowpack, runoff, and precipitation. This study documents small drinking water system managers’ experiences during the 2012–2016 Drought. We contribute to research on w ...
algorithms; energy; hydrologic cycle; prediction; time series analysis; wind; wind power; California; Spain; Wyoming
Abstract:
... In this paper, an efficient new hybrid time series forecasting model combining variational mode decomposition (VMD) and Deep learning mixed Kernel ELM (MKELM) Autoencoder (AE) has been presented for precise prediction of wind power. It is well known that KELM-AE avoids manual tuning of weights of hidden layer nodes, and exhibits superb model generalization property, reduces execution time, and pro ...
Melospiza melodia; adaptive radiation; climate; color; gene flow; genetic drift; genomics; phenotypic variation; physiology; plumage; population structure; California
Abstract:
... Disentangling the effects of neutral and adaptive processes in maintaining phenotypic variation across environmental gradients is challenging in natural populations. Song sparrows (Melospiza melodia) on the California Channel Islands occupy a pronounced east‐west climate gradient within a small spatial scale, providing a unique opportunity to examine the interaction of genetic isolation (reduced g ...
air pollution; air quality; carbon; climate; climate models; energy; environment; meteorology; nationalities and ethnic groups; pollutants; public health; California
Abstract:
... An environmental justice (EJ) analysis shows that adoption of low-carbon energy sources in the year 2050 reduces the race/ethnicity disparity in air pollution exposure in California by as much as 20% for PM₂.₅ mass and by as much as 40% for PM₀.₁ mass. An ensemble of six different energy scenarios constructed using the energy-economic optimization model CA-TIMES were evaluated in future years. Cri ...
... In the western United States, the number and severity of large wildfires have been growing for decades. Biomass burning (BB) is a major source of volatile organic compounds (VOCs) to the atmosphere both globally and regionally. Following emission, BB VOCs are oxidized while being transported downwind, producing ozone, secondary organic aerosols, and secondary hazardous VOCs. In this research, we m ...
air; air quality; aircraft; airports; asthma; aviation; environment; morbidity; mortality; titration; California
Abstract:
... Aviation emissions from landing and takeoff operations (LTO) can degrade local and regional air quality leading to adverse health outcomes in populations near airports and downwind. In this study we aim to quantify the air quality and health-related impacts from commercial LTO emissions in the continental U.S. for two recent years’ inventories, 2011 and 2016. We quantify the LTO-attributable PM₂.₅ ...
Internet; air; air quality; computer software; data collection; particulates; California
Abstract:
... As low-cost air quality sensors become more widely utilized, more tools and methods are needed to help users access/process sensor data, identify poorly performing sensors, and analyze/visualize sensor data. Free and open-source software (FOSS) packages developed for use on FOSS data science platforms are well-suited to support this need by offering replicable and shareable tools that can be adapt ...
air pollution; aircraft; airports; environment; land use; metropolitan areas; noise pollution; odds ratio; premature birth; regression analysis; synergism; California
Abstract:
... Air pollution has been linked to preterm birth (PTB) while findings for noise exposure have been mixed. Few studies – none considering airports – have investigated combined exposures. We explore the relationship between joint exposure to airport-related noise, airport ultrafine particles (UFP), and vehicle traffic-related air pollution (TRAP) on risk of PTB near Los Angeles International Airport ( ...
Strongylocentrotus purpuratus; animal behavior; community structure; ecosystems; forests; California
Abstract:
... Understanding the role of animal behaviour in linking individuals to ecosystems is central to advancing knowledge surrounding community structure, stability and transition dynamics. Using 22 years of long‐term subtidal monitoring, we show that an abrupt outbreak of purple sea urchins (Strongylocentrotus purpuratus), which occurred in 2014 in southern Monterey Bay, California, USA, was primarily dr ...
Margo A. Sidell; Zhanghua Chen; Brian Z. Huang; Ting Chow; Sandrah P. Eckel; Mayra P. Martinez; Fred Lurmann; Duncan C. Thomas; Frank D. Gilliland; Anny H. Xiang
COVID-19 infection; Poisson distribution; acute exposure; air pollutants; air pollution; air quality; autocorrelation; health services; meta-analysis; relative risk; research; California
Abstract:
... Air pollution exposure may make people more vulnerable to COVID-19 infection. However, previous studies in this area mostly focused on infection before May 2020 and long-term exposure. To assess both long-term and short-term exposure to air pollution and COVID-19 incidence across four case surges from 03/1/2020 to 02/28/2021. The cohort included 4.6 million members from a large integrated health c ...
Holly Elser; Sebastian T. Rowland; Sara Y. Tartof; Robbie M. Parks; Katia Bruxvoort; Rachel Morello-Frosch; Sarah C. Robinson; Alice R. Pressman; Rong X. Wei; Joan A. Casey
adults; ambient temperature; autumn; climate change; health services; patients; poverty; spring; telemedicine; urinary tract; urinary tract diseases; California
Abstract:
... In the United States (US), urinary tract infections (UTI) lead to more than 10 million office visits each year. Temperature and season are potentially important risk factors for UTI, particularly in the context of climate change. We examined the relationship between ambient temperature and outpatient UTI diagnoses among patients followed from 2015 to 2017 in two California healthcare systems: Kais ...
Macrocystis pyrifera; Rhodophyta; Ulva; autotrophs; carbon; data collection; geographical distribution; macroalgae; metabolism; multivariate analysis; museums; particulate organic matter; phytoplankton; pyruvic acid; space and time; taxonomy; Alaska; California; Chile
Abstract:
... Carbon isotope fingerprinting, or multivariate analysis using δ¹³C values of individual compounds, is a powerful tool in ecological studies, particularly measurements of essential amino acids (EAA δ¹³C). Despite the widespread application of this technique, there has been little methodological validation to determine (a) whether multivariate EAA δ¹³C signatures (fingerprints) of primary producer g ...
United States Environmental Protection Agency; basins; environmental protection; evaporation; oils; public health; saline water; seepage; shale; wastewater; water quality; water shortages; California; Colorado; New Mexico; Ohio; Oklahoma; Pennsylvania; Texas; West Virginia; Wyoming
Abstract:
... The rapid development of unconventional oil and gas (O&G) extraction around the world produces a significant amount of wastewater that requires appropriate management and disposal. Produced water (PW) is primarily disposed of through saltwater disposal wells, and other reuse/disposal methods include using PW for hydraulic fracturing, enhanced oil recovery, well drilling, evaporation ponds or seepa ...
Avian orthoreovirus; Protoparvovirus; RNA-directed DNA polymerase; Rotavirus; animal health; atrophy; databases; food safety; gizzard; histology; hyperplasia; necropsy; odds ratio; poults; research; transmission electron microscopy; viral enteritis; viruses; California
Abstract:
... Poult enteritis complex is a multifactorial intestinal disease of young turkeys, which results in considerable economic losses for commercial turkey producers. The objectives of this study were to determine the current prevalence of viral enteritis in California turkeys, assess the methods of detection and the gross and histological presentations of laboratory case submissions. The electronic data ...
Bayesian theory; El Nino; North Atlantic Oscillation; autumn; climatic zones; cluster analysis; hydrology; kriging; principal component analysis; rain; summer; winter; Antarctic region; California
Abstract:
... The aim of this research is to enlarge knowledge of space-time evolution of precipitation in California over the last decade on a monthly, seasonal and annual time-scale. This study also analyses the relationship between precipitation and teleconnection patterns with most influence on Californian climate. The homogeneity of the data from the selected stations was verified and finally 165 meteorolo ...
biodiversity; biomass; birdwatching; body size; carbon sequestration; citizen science; data collection; ecological competition; ecosystems; filtration; parasitism; protocols; salt marshes; shorelines; topology; uncertainty; waterfowl; California; Mexico
Abstract:
... Biodiversity plays important roles in nature's contributions to people (i.e., ecosystem services), but the critical details of how biodiversity contributes are challenging to determine. Efforts to identify the components of an ecosystem that provide services have improved our understanding of which species, functional groups, population, or habitats directly provide services. However, species do n ...
... Ants alter soil moisture and nutrient distributions during foraging and nest construction. Here, we investigated how the effects of ants on soil vary with elevation. We compared moisture, carbon, and nitrogen levels in soil samples taken both within nests and nearby the nests (control) of two subterranean ant species. Using a paired design, we sampled 17 sites along elevation gradients in two Cali ...
acute exposure; air quality; environment; land use; meteorological data; models; morbidity; mortality; satellites; smoke; wildfires; California
Abstract:
... Wildland fire smoke contains large amounts of PM₂.₅ that can traverse tens to hundreds of kilometers, resulting in significant deterioration of air quality and excess mortality and morbidity in downwind regions. Estimating PM₂.₅ levels while considering the impact of wildfire smoke has been challenging due to the lack of ground monitoring coverage near the smoke plumes. We aim to estimate total PM ...
benzene; climate change; computer software; decision making; environment; groundwater; groundwater contamination; human health; loam soils; risk; sandy loam soils; silt loam soils; solutes; surface temperature; water quality; water table; California
Abstract:
... Contaminated groundwater is a priority issue on the environmental agendas of developed countries. Therefore, there is an obvious need to develop instruments and decision-making mechanisms that allow the estimation of the risk to human health due to the presence of contaminants in soils and groundwater, in a fast and reliable manner. Thus, this study aims to assess whether the spilling of hydraulic ...
... The historic extirpation and subsequent recovery of sea otters (Enhydra lutris) have profoundly changed coastal social-ecological systems across the northeastern Pacific. Today, the conservation status of sea otters is informed by estimates of population carrying capacity or growth rates independent of human impacts. However, archaeological and ethnographic evidence suggests that for millennia, co ...
... Most bioaccumulation assessments select one or several compound classes a priori for analysis performed by either liquid or gas chromatography coupled with mass spectrometry (LC-MS or GC–MS). When organisms are exposed to complex mixtures of trace organic contaminants (TOrCs), targeted chemical assays limit understanding of contaminant profiles in biological tissues and associated risks. We used a ...
Daniel F Hofstadter; Nicholas F Kryshak; Connor M Wood; Brian P Dotters; Kevin N Roberts; Kevin G Kelly; John J Keane; Sarah C Sawyer; Paula A Shaklee; H Anu Kramer; RJ Gutiérrez; M Zachariah Peery
... Invasive species are a primary threat to biodiversity and are challenging to manage once populations become established in previously unoccupied areas. But removing them is further complicated when invasions occur in continental, mixed‐ownership systems. We demonstrate a rare conservation success: the regional‐scale removal of an invasive predator – the barred owl (Strix varia) – to benefit the sp ...
... California’s dairy sector accounts for ∼50% of anthropogenic CH₄ emissions in the state’s greenhouse gas (GHG) emission inventory. Although California dairy facilities’ location and herd size vary over time, atmospheric inverse modeling studies rely on decade-old facility-scale geospatial information. For the first time, we apply artificial intelligence (AI) to aerial imagery to estimate dairy CH₄ ...
Margaret E. Stack; Jennifer M. Cossaboon; Christopher W. Tubbs; L. Ignacio Vilchis; Rachel G. Felton; Jade L. Johnson; Kerri Danil; Gisela Heckel; Eunha Hoh; Nathan G. Dodder
Gymnogyps californianus; blubber; comprehensive two-dimensional gas chromatography; environmental science; estrogen receptors; marine mammals; mass spectrometry; polychlorinated biphenyls; technology; California; Gulf of California; Mexico
Abstract:
... Coastal reintroduction sites for California condors (Gymnogyps californianus) can lead to elevated halogenated organic compound (HOC) exposure and potential health impacts due to the consumption of scavenged marine mammals. Using nontargeted analysis based on comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC/TOF-MS), we compared HOC profiles of pla ...
copper; environmental science; fungicides; sediments; spring; streams; surface water; California
Abstract:
... The objective of this study was to assess annual, seasonal and spatial trends in copper sediment concentrations in an agricultural California stream (Cache Slough) based on sampling 12 sites over two seasons (spring and fall) in 2012, 2013 and 2014. The relationship between copper sediment concentrations and precipitation was also evaluated. The results from this study showed that copper sediment ...
Landsat; Mediterranean climate; Sequoiadendron giganteum; canopy; drought; evapotranspiration; mountains; neural networks; tree mortality; water stress; California
Abstract:
... Water availability in mountain forests affects vegetation response to drought, which in turn changes evapotranspiration (ET). We investigated water-balance indicators based on precipitation (P) minus ET to assess Mediterranean-climate forest vulnerability to multi-year droughts. We used the drought-vulnerable dense mixed-conifer forests of California’s Sierra Nevada, which includes 78 groves of gi ...
... Fecal sources to recreational surf zone waters should be identified to protect public health. While watershed origins of human and other fecal sources are often discoverable by quantitative polymerase chain reaction (qPCR) of fecal markers using spatially stratified samples, similarly assessing wastewater treatment plant (WWTP) outfall and other offshore contributions to surf zones is challenged b ...
aquifers; drought; environment; evapotranspiration; groundwater; hydrologic models; remote sensing; uncertainty; water shortages; California
Abstract:
... Accurate and timely estimates of groundwater storage changes are critical to the sustainable management of aquifers worldwide, but are hindered by the lack of in-situ groundwater measurements in most regions. Hydrologic remote sensing measurements provide a potential pathway to quantify groundwater storage changes by closing the water balance, but the degree to which remote sensing data can accura ...
... Plant demand for K in rice is comparable to nitrogen. With yields and management practices changing, refining K fertility management and decision-making tools is necessary. Our objectives were to determine (1) how soil K balances affect soil K indices, (2) the best soil test indicator of plant K availability, and (3) the relationships between plant and soil K indices. We assessed soil (plow layer) ...
... The chemical compositions of paleosols are frequently used to reconstruct paleoclimatic and paleoenvironmental conditions using proxy relationships derived from modern soils. However, through time, some of the proxy relationships have been applied to paleosol types that were not part of the original training data sets, or they have been analyzed following pretreatment steps that were not employed ...
air quality; environment; freight; human health; hydrogen; hydrogen fuels; ozone; public health; secondary pollutants; zero emissions; California
Abstract:
... Communities located adjacent to goods movement hubs (such as major ports) experience degraded air quality (AQ) because of emissions from on-road and off-road diesel equipment, including heavy-duty diesel trucks (HDDT), cargo, and materials handling equipment (CHE), ships, and rail technologies. In response, California is pursuing transitions to efficient and cleaner freight systems by introducing ...
basins; case studies; data collection; evapotranspiration; information systems; research; runoff; snow; soil water; stream flow; subsurface flow; water management; watersheds; California
Abstract:
... The NASA LIS/WRF‐Hydro system is a coupled modeling framework that combines the modeling and data assimilation (DA) capabilities of the NASA Land Information System (LIS) with the multi‐scale surface hydrological modeling capabilities of the WRF‐Hydro model, both of which are widely used in both operations and research. This coupled modeling framework builds on the linkage between land surface mod ...
... Examine the association between educational attainment and improvement in food practice outcomes of the California Expanded Food and Nutrition Education Program (EFNEP) participants. Secondary data analysis. A total of 19,089 participants, 92.3% female, 77.2% Hispanic, 19.7% with ≤ 6th-grade education, and 68.9% with incomes ≤ 100% of the federal poverty level. Improvement in food resource managem ...
cardiovascular diseases; cohort studies; death; diabetes; dietetics; food frequency questionnaires; fruits; mortality; public health; risk; soft drinks; sugar sweetened beverages; California
Abstract:
... The evidence linking sugar-sweetened beverage (SSB) intake and mortality risk is conflicting, and associations between various SSB subtypes and mortality remain unclear. To examine the association between baseline SSB intake, subtypes of SSB intake, and mortality risk in women. Prospective cohort study. Participants of the California Teachers Study (n = 100,314; median age = 53 years) free of card ...
Monica K. Lieng; James P. Marcin; Ilana S. Sigal; Sarah C. Haynes; Parul Dayal; Daniel J. Tancredi; Marianne Gausche‐Hill; Jamie L. Mouzoon; Patrick S. Romano; Jennifer L. Rosenthal
cross-sectional studies; hospitals; patients; regression analysis; rural health; California
Abstract:
... PURPOSE: Pediatric readiness scores may be a useful measure of a hospital's preparedness to care for children. However, there is limited evidence linking these scores with patient outcomes or other metrics, including the need for interfacility transfer. This study aims to determine the association of pediatric readiness scores with the odds of interfacility transfer among a cohort of noninjured ch ...
canopy; comorbidity; environment; green infrastructure; health care costs; health status; normalized difference vegetation index; patient care; regression analysis; remote sensing; trees; California
Abstract:
... Prior studies have shown higher green cover levels are associated with beneficial health outcomes. We sought to determine if residential green cover was also associated with direct healthcare costs. We linked residential Normalized Difference Vegetation Index (NDVI) satellite data for 5,189,303 members of Kaiser Permanente Northern California (KPNC) to direct individual healthcare costs for 2003–2 ...
air pollution; at-risk population; carbon; cardiovascular diseases; elderly; environment; equations; health care costs; models; nationalities and ethnic groups; nitric oxide; nitrogen dioxide; pollutants; traffic; California
Abstract:
... Traffic related air pollution (TRAP) is associated with a complex and diverse array of health effects. It is unknown whether these effects may be reflected by higher health care costs. Evaluate the association between TRAP exposure and direct health care costs in an elderly population. This multi-ethnic population-based cohort of 25,684 elderly subjects, served by Kaiser Permanente Northern Califo ...
... Household food insecurity persists in the United States and has important implications for health and well-being. Food insecurity in female-identified caregivers is particularly concerning, given its association with their mental health and adverse health outcomes for their children. Food insecurity is associated with disordered eating but, to our knowledge, no prior studies have examined an assoc ...
income; nationalities and ethnic groups; pollution; pregnancy; premature birth; regression analysis; research; risk; satellites; smoke; wildfires; California
Abstract:
... There is limited population-scale evidence on the burden of exposure to wildfire smoke during pregnancy and its impacts on birth outcomes. In order to investigate this relationship, data on every singleton birth in California 2006–2012 were combined with satellite-based estimates of wildfire smoke plume boundaries and high-resolution gridded estimates of surface PM₂.₅ concentrations and a regressi ...
descriptive statistics; environmental impact; food quality; nationalities and ethnic groups; public health; taste; California; New York; Texas
Abstract:
... Chefs have the potential to influence diet quality and food systems sustainability through their work. We aimed to assess the attitudes and perceptions of culinary students about nutrition and sustainability as part of their roles, responsibilities and future work as chefs. We surveyed students attending the Culinary Institute of America (CIA) in the fall of 2019 (n 546). Descriptive statistics co ...
... BACKGROUND: Sanitation, consisting of eliminating unharvested nuts (mummies) that serve as both harborage and food source for navel orangeworm (Amyelois transitella), is the foundation for control in almonds and pistachios. Sometimes sanitation is ineffective and needs to be augmented. Trials in almonds and pistachios were conducted early October 2005–2006 to determine if insecticides applied post ...
automation; birds; computer software; habitats; humans; models; surveys; vocalization; California
Abstract:
... Occupancy modeling is used to evaluate avian distributions and habitat associations, yet it typically requires extensive survey effort because a minimum of 3 repeat samples are required for accurate parameter estimation. Autonomous recording units (ARUs) can reduce the need for surveyors on-site, yet their utility was limited by hardware costs and the time required to manually annotate recordings. ...
biodiversity; data collection; forestry; neural networks; support vector machines; weather; California; India; Indiana
Abstract:
... Hyperspectral datasets are widely used in many applications of remote sensing in the fields of agriculture, forestry, weather, urban planning, water study, biodiversity and surface changes. Our focus is agriculture with different perspectives such as classifications of crops, identification of different crop growth stages, fallow land, etc. However, the major challenge in working with hyperspectra ...