Western Geographic Science Center

Publications

Filter Total Items: 357
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Year Published: 2019

Rating fire danger from the ground up

Soil moisture information could improve assessments of wildfire probabilities and fuel conditions, resulting in better fire danger ratings.

Matthew Levi; Erik S. Krueger; Grant J. Snitker; Tyson Ochsner; Villarreal, Miguel L.; Emile H. Elias; Dannele E. Peck

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Year Published: 2019

Phenology patterns indicate recovery trajectories of ponderosa pine forests after high-severity fires

Post-fire recovery trajectories in ponderosa pine (Pinus ponderosa Laws.) forests of the US Southwest are increasingly shifting away from pre-burn vegetation communities. This study investigated whether phenological metrics derived from a multi-decade remotely sensed imagery time-series could differentiate among grass, evergreen shrub, deciduous...

Walker, Jessica; Soulard, Christopher E.

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Year Published: 2019

Agricultural cropland extent and areas of South Asia derived using Landsat satellite 30-m time-series big-data using random forest machine learning algorithms on the Google Earth Engine cloud

The South Asia (India, Pakistan, Bangladesh, Nepal, Sri Lanka and Bhutan) has a staggering 900 million people (~43% of the population) who face food insecurity or severe food insecurity as per United Nations, Food and Agriculture Organization’s (FAO) the Food Insecurity Experience Scale (FIES). The existing coarse-resolution (>250-m) cropland...

Murali Krishna Gumma; Thenkabail, Prasad; Pardhasaradhi Teluguntla; Oliphant, Adam

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Year Published: 2019

A mosaic of land tenure and ownership creates challenges and opportunities for transboundary conservation in the US-Mexico borderlands

In the Madrean Sky Islands of western North America, a mixture of public and private land ownership and tenure creates a complex situation for collaborative efforts in conservation. In this case study, we describe the current ownership and management structures in the US-Mexico borderlands where social, political, and economic conditions create...

Villarreal, Miguel L.; Haire, Sandra L.; Juan Carlos Bravo; Norman, Laura M.

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Year Published: 2019

Landsat time series assessment of invasive annual grasses following energy development

Invasive annual grasses are of concern in many areas of the Western United States because they tolerate resource variability and have high reproductive capacity, with propagules that are readily dispersed in disturbed areas like those created and maintained for energy development. Early-season invasive grasses “green up” earlier than the most...

Villarreal, Miguel L.; Soulard, Christopher E.; Eric Waller
Villarreal, M.L., Soulard, C.E. and E.K. Waller. 2019. Landsat time series assessment of invasive annual grasses following energy development. Remote Sensing 11(21), 2553. https://doi.org/10.3390/rs11212553

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Year Published: 2019

The HayWired earthquake scenario—Societal consequences

The HayWired Earthquake Scenario—Societal Consequences is the third volume of U.S. Geological Survey (USGS) Scientific Investigations Report 2017–5013, which describes the HayWired scenario, developed by USGS and its partners. The scenario is a hypothetical yet scientifically realistic earthquake sequence that is being used to better understand...

Detweiler, Shane T.; Wein, Anne M.
Detweiler, S.T., and Wein, A.M., eds., The HayWired earthquake scenario—Societal consequences: U.S. Geological Survey Scientific Investigations Report 2017–5013–R–W, https://doi.org/10.3133/sir20175013V3.

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Year Published: 2019

Spatial and temporal distribution of bacterial indicators and microbial-source tracking within Tumacácori National Historical Park and the upper Santa Cruz River, southern Arizona and northern Mexico, 2015–2016

Tumacácori National Historical Park (TUMA) in southern Arizona protects the culturally important Mission San José de Tumacácori, while also managing a part of the ecologically diverse riparian corridor of the Santa Cruz River. The quality of the water flowing through depends solely on upstream watershed activities, and among the water-quality...

Paretti, Nicholas V.; Kephart, Christopher M.; Porter, Thomas J.; Hermosillo, Edyth; Cederberg, Jay R.; Mayo, Justine P.; Gungle, Bruce W.; Coes, Alissa L.; Tucci, Rachel S.; Norman, Laura M.
Paretti, N.V., Kephart, C.M., Porter, T.J., Hermosillo, E., Cederberg, J.R., Mayo, J.P., Gungle, B., Coes, A.L., Tucci, R.S., and Norman, L.M., 2019, Spatial and temporal distribution of bacterial indicators and microbial-source tracking within Tumacácori National Historical Park and the upper Santa Cruz River, southern Arizona and northern Mexico, 2015–2016: U.S. Geological Survey Scientific Investigations Report 2019–5108, 102 p., https://doi.org/10.3133/sir20195108.

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Year Published: 2019

Integrating stream gage data and Landsat imagery to complete time-series of surface water extents in Central Valley, California

Accurate monitoring of surface water location and extent is critical for the management of diverse water resource phenomena. The multi-decadal archive of Landsat satellite imagery is punctuated by missing data due to cloud cover during acquisition times, hindering the assembly of a continuous time series of inundation dynamics. This study...

Walker, Jessica J.; Soulard, Christopher E.; Petrakis, Roy E.

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Year Published: 2019

Scenarios of climate adaptation potential on protected working lands from management of soils

Management of protected lands may enhance ecosystem services that conservation programs were designed to protect. Practices that build soil organic matter (SOM) on agricultural lands also increase soil water holding capacity, potentially reducing climatic water deficit (CWD), increasing actual evapotranspiration (AET) and increasing groundwater...

Byrd, Kristin B.; Alvarez, P.; Sleeter, Benjamin; Flint, Lorraine E.; Cameron, D. Richard; Creque, J.

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Year Published: 2019

A meta-analysis of global crop water productivity of three leading world crops (wheat, corn, and rice) in the irrigated areas over three decades

The overarching goal of this study was to perform a comprehensive meta-analysis of irrigated agricultural Crop Water Productivity (CWP) of the world’s three leading crops: wheat, corn, and rice based on three decades of remote sensing and non-remote sensing-based studies. Overall, CWP data from 148 crop growing study sites (60 wheat, 43 corn, and...

Daniel J. Foley; Thenkabail, Prasad; Aneece, Itiya; Pardhasaradhi Teluguntla; Oliphant, Adam

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Year Published: 2019

Case study: Thomas Fire

No abstract available.

Kreitler, Jason R.; East, Amy E.; Sankey, Joel B.; Tague, Christina (Naomi)
Kreitler, J., J.B. Sankey, A. East, and C. Tague. (2018)The Thomas Fire in Central Coast Regional Report. California’s Fourth Climate Change Assessment. Publication number: SUM-CCCA4-2018-006 https://www.energy.ca.gov/sites/default/files/2019-07/Reg%20Report-%20SUM-CCCA4-2018-006%20CentralCoast.pdf

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Year Published: 2019

Genetic variation in tree leaf chemistry predicts the abundance and activity of autotrophic soil microorganisms

Genetic variation in the chemistry of plant leaves can have ecosystem-level consequences. Here we address the hypothesis that genetic variation in foliar condensed tannins along a Populus hybridization gradient influence soil ammonia oxidizers, autotrophic microorganisms that perform the first step of nitrification and are not dependent on carbon...

Selmants, Paul; Schweitzer, Jennifer A.; Adair, Karen L.; Holeski, Liza M.; Lindroth, Richard L; Hart, Stephen C.; Whitham, Thomas G.