20 Works

Alaskan Arctic Coastal Plain Polygonal Tundra Geomorphology Map

Mark J. Lara
We mosaicked twelve LandSat-8 OLI satellite images taken during the summer of 2014, which were used in an object based image analysis (OBIA) to classify the landscape. We mapped seventeen of the most dominant geomorphic land cover classes on the Alaskan Coastal Plain (ACP): **value** | **class name** 1 | Coastal saline waters 2 | Large lakes 3 | Medium lakes 4 | Small lakes 5 | Ponds 6 | Rivers 7 | Nonpatterned Drained...

Past and Future Climate Reconstructions for the Chisos, Davis and Guadalupe Mountains, Texas, USA

Dylan Schwilk Helen Poulos
Climate summary variables reconstructed in high resolution for past and projected futures. We took detailed microclimate measurements across three mountain ranges in West Texas to identify key topographical drivers of microclimate variation, and modeled future fine scale climate as a function of topography and projected regional weather across multiple future scenarios.

Assessing the State of Water Resource Knowledge and Tools for Future Planning in the Rio Grande-Rio Bravo Basin

Jose Pablo Ortiz, Samuel Sandoval Solis & Romina Diaz Gomez
This project inventories and reviews available water resource models used to meet multiple (and often competing) water resource management objectives. Water resource modeling tools have been developed for many different regions and sub-basins of the Rio Grande/Bravo (RGB). Each of these tools have specific objectives, whether it is to explore drought mitigation alternatives, conflict resolution, climate change evaluation, tradeoff and economic synergies, water allocation, reservoir operations, or collaborative planning. We specifically evaluate the applicability of...

Drought Indicators of the South Central Plains (1981-2014)

Mark Shafer & Steven Quiring
The South Central U.S. is one of the main agricultural regions in North America: annual agricultural production is valued at more than $44 billion dollars. However, as climate conditions change, the region is experiencing more frequent and severe droughts, with significant impacts on agriculture and broader consequences for land management. For example, in 2011 drought caused an estimated $7.6 billion in agricultural losses in Texas and an additional $1.6 billion in Oklahoma. Although there are...

Alaskan Arctic Coastal Plain NDVI trend (1999-2014) Map

Mark J. Lara
Normalized difference vegetation index (NDVI) trend map was computed for the Alaskan Arctic Coastal Plain between 1999 and 2014. The decadal trend of each pixel was computed using 40-110 individual Landsat (TM, ETM+, OLI) satellite images acquired during July or August.

Downscaled climate projections at 800m spatial resolution for the north central United States based on the Multivariate Adaptive Constructed Analog (MACA) method from selective CMIP5 models

Imtiaz Rangwala & Candida F. Dewes
This dataset provides downscaled climate projections at 800m spatial resolution for nine ecologically-relevant climate variables for the north central US region between 35.5N-49N latitude and 88W-118W longitude from 12 Coupled Model Intercomparison Project - Phas 5 (CMIP5) climate model simulations (6GCMs x 2RCPs) which are downscaled using the Multivariate Adaptive Constructed Analog (MACA) method. These projections are available as five different (approximately) 30-year climate normals between 1950 and 2099 as monthly values, except for Aridity...

County-level drought indices The Palmer Drought Severity Index(PDSI)and Palmer Hydrological Drought Index(PHDI)

Nazla Bushra & Robert V. Rohli
Drought is a natural hazard that inflicts costly damage to the environment and human communities. Although ample literature exists on the climatological aspects of drought, little is known on whether existing drought indices can predict the damages and how different human communities respond and adapt to the hazard. This project examines (1) whether existing drought indices can predict the occurrence of drought events and their actual damages; (2) how the adaptive capacity (i.e., resilience) varies...

Final Report: Integrated Ecosystem Model for Alaska and Northwest Canada Project

A. David McGuire, T. Scott Rupp, Amy Breen, Eugenie S. Euskirchen, Sergey Marchenko, Vladimir Romanovsky, Alec Bennett, W. Robert Bolton, Tobey Carman, Helene Genet, Tom Kurkowski, Mark Lara, Dmitry Nicolsky, Ruth Rutter & Kristin Timm
This report describes the progress made by the Integrated Ecosystem Model (IEM) for Alaska and Northwest Canada Project for the full duration of the project (September 1, 2011 through August 31, 2016). This primary goal in this project was to develop the IEM modeling framework to integrate the driving components for and the interactions among disturbance regimes, permafrost dynamics, hydrology, and vegetation succession/migration for Alaska and Northwest Canada. The major activities of the project include...

Combined county-level drought incidence, damage, and census data

Volodymyr V. Mihunov, Nina S. N. Lam & Lei Zou
The threat of droughts and their associated impacts on the landscape and human communities have long been recognized in the United States, especially in high risk areas such as the southcentral region. This project examines whether existing drought indices can predict the occurrence of drought events and their actual damages, how the adaptive capacity (i.e., resilience) varies across space, and what public outreach and engagement effort would be most effective for mitigation of risk and...

Data for Climate drives shifts in grass reproductive phenology across the western U.S. (1895-2013)

Seth Munson
This dataset includes herbaria specimen records that report collection location and date (from 1895 – 2013) for grasses from the Southwest Environmental Information Network (http://swbiodiversity.org/seinet, Accessed 3 March 2014; 79% of records) and Global Biodiversity Information Facility (http://www.gbif.org, [accessed 3 March 2014]; 21% of records) for 12 states in the western United States. Associated climate data include monthly mean temperature, maximum temperature, minimum temperature, and precipitation from the herbaria record locations from climate rasters provided...

The Effects of Climate Change on Wetlands in the Main Hawaiian Islands: An Initial Assessment

Dan A. Polhemus
The Hawaiian Islands are an intraplate hotspot chain lying in the Eastern Pacific Ocean, and consist of a mix of generally steep-sided, rocky high islands in the southeast and low-lying coral atolls in the northwest. Due to their topography, these islands harbor a relatively limited number of wetland ecosystems, although the features that are present are diverse, ranging from a hypersaline lake on Laysan, to acidic upland bogs such as Pepeopae on Molokai, to large...

Fire Risk Frequency Analysis- South Central Plains

Mark Shafer, Amy Hays, Brian Hays & John Weir
Fire is a natural and necessary component of the South Central Plains ecosystem. However, fire suppression and more frequent droughts in the region have resulted in a build-up of dry fuels loads such as dead wood, resulting in fires that burn hotter and impact the landscape more severely. Uncontrolled wildfires have cost the region several billion dollars in the past five years. Further, fire suppression has resulted in substantial losses in native plant biodiversity and...

Landscape Evaporative Response Index (LERI): A high resolution monitoring and assessment of evapotranspiration across the Contiguous United States

Imtiaz, Lesley Smith, Gabriel Senay, Joseph Barsugli, Stefanie Kagone, Mike Hobbins Rangwala
Landscape Evaporative Response Index (LERI) is remotely-sensed high-resolution information of the evaporative response from the land in near real time. LERI assesses anomalies in actual evapotranspiration (ETa), as percentiles, across the Contiguous US and northern Mexico at a 1-km spatial resolution. LERI is based on the ETa data produced by the U. S. Geological Survey using the operational Simplified Surface Energy Balance (SSEBop) model. SSEBop combines evapotranspiration fraction generated from remotely sensed MODIS thermal imagery,...

Monthly Pan Evaporation Data across the Continental United States between 1950-2001

Michael T. Hobbins, Joseph J. Barsugli, Candida F. Dewes & Imtiaz Rangwala
Pan evaporation is a measure of atmospheric evaporative demand (E0) for which long term and spatially distributed observations are available from the NOAA Cooperative Observer (COOP) Network. However, this data requires extensive quality control and homogenization due to documented and undocumented station moves and other factors including human errors in recording or digitization. Station-based Pan Evaporation measurements (in mm) from 247 stations across the continental United States were compiled and quality controlled for the analysis...

Applications of Climate Downscaling in the Main Hawaiian Islands: Balancing Climate Modelers’ Products and Impact Modelers’ Expectations

David Helweg & Victoria Keener
High-resolution projections of future terrestrial climate conditions for the high Hawaiian islands (Hawaiʻi Island, Maui Nui, Oʻahu, and Kauaʻi) have been developed using statistical and dynamical downscaling methods. A “Workshop on Climate Downscaling and its Application in the High Hawaiian Islands” (https://pubs.er.usgs.gov/publication/ofr20161102) was held in 2015 to address questions from natural resource managers about how to integrate climate-related projections into their resource management decisions. Since the 2015 workshop, additional climate modeling has been done. New...

Drought in the U.S.-Affiliated Pacific Islands: A Multi-level Assessment

Dan A. Polhemus
Although tropical Pacific islands are generally perceived as having wet climates, they are vulnerable to periodic episodes of drought. This literature review strives to establish a base of information relating to such drought events in the U. S.- affiliated Pacific Islands (USAPI), a vast expanse of the oceanic Pacific larger than the North American continent, spanning five time zones and the International Date Line roughly between the southern Tropic of Capricorn across the equator to...

The Pacific Islands Climate Science Center Five-Year Science Agenda, 2018–2022

A. David Helweg, Dan A. Polhemus & Bonnie J. Myers
The Department of the Interior Pacific Islands Climate Science Center (PI-CSC) supports adaptation in Hawai‘i and the US Affiliated Pacific Islands by producing new knowledge and tools through research, working with resource managers and community planners to incorporate environmental knowledge in adaptation decision making, and providing education and training to build capacity in resource managers and scientists. In the Pacific Islands region, over 500 endangered and other vulnerable species exist in a complex set of...

Daily streamflow and reservoir water elevation data for Arkansas, Louisiana, Oklahoma, and Texas (2006-2099)

Cody Hudson & Wayne Kellogg
Daily streamflow and reservoir water elevation data for modeled locations in the Red River Basin. Values reported are for 18 different GCM (Global Climate Model) / RCP (Representative Concentration Pathway) / GDM Downscaling scenarios. Climate data from each scenario was input into a Variable Infiltration Capacity (VIC) model, that output flow values. These values were then input into RiverWare, to determine the impacts on regulated flows, lake levels and water availability. RiverWare was used for...

Hydrologic sensitivity to climate change and aspen mortality in Upper Sheep Creek, Reynolds Creek Experimental Watershed (21st century scenarios)

Adrienne Marshall
Hourly hydrometeorological data was collected over the 30-year period from 1984-2014 in Upper Sheep Creek, within the Reynolds Creek Experimental Watershed, Idaho, USA. These data were used to calibrate the one-dimensional Simultaneous Heat and Water (SHAW) model. These data and the SHAW calibration have previously been described in multiple publications, particularly Chauvin et al 2011 and Flerchinger et al 2016. In the dataset presented here, climate scenarios have been constructed, applied to the historic record,...

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