Western Geographic Science Center

Publications

Filter Total Items: 378
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Year Published: 2017

Human footprint affects US carbon balance more than climate change

The MC2 model projects an overall increase in carbon capture in conterminous United States during the 21st century while also simulating a rise in fire causing much carbon loss. Carbon sequestration in soils is critical to prevent carbon losses from future disturbances, and we show that natural ecosystems store more carbon belowground than managed...

Bachelet, Dominique; Ferschweiler, Ken; Sheehan, Tim; Baker, Barry; Sleeter, Benjamin M.; Zhu, Zhiliang
D. Bachelet, K. Ferschweiler, T. Sheehan, B. Baker, B. Sleeter and Z. Zhu, Human Footprint Affects US Carbon Balance More Than Climate Change, In Reference Module in Earth Systems and Environmental Sciences, Elsevier, 2017, ISBN 9780124095489, http://dx.doi.org/10.1016/B978-0-12-409548-9.09770-0

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Year Published: 2016

Intra-community implications of implementing multiple tsunami-evacuation zones in Alameda, California

Tsunami-evacuation planning in coastal communities is typically based on maximum evacuation zones for a single scenario or a composite of sources; however, this approach may over-evacuate a community and overly disrupt the local economy and strain emergency-service resources. To minimize the potential for future over-evacuations, multiple...

Peters, Jeff; Wood, Nathan J.; Wilson, Rick; Miller, Kevin

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Year Published: 2016

Mapping presence and predicting phenological status of invasive buffelgrass in southern Arizona using MODIS, climate and citizen science observation data

The increasing spread and abundance of an invasive perennial grass, buffelgrass (Pennisetum ciliare), represents a critical threat to the native vegetation communities of the Sonoran desert in southern Arizona, USA, where buffelgrass eradication is a high priority for resource managers. Herbicidal treatment of buffelgrass is most effective when...

Wallace, Cynthia S.A.; Walker, Jessica J.; Skirvin, Susan M.; Patrick-Birdwell, Caroline; Weltzin, Jake F.; Raichle, Helen
Wallace, C.S.A.; Walker, J.J.; Skirvin, S.M.; Patrick-Birdwell, C.; Weltzin, J.F.; Raichle, H. Mapping Presence and Predicting Phenological Status of Invasive Buffelgrass in Southern Arizona Using MODIS, Climate and Citizen Science Observation Data. Remote Sens. 2016, 8, 524.

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Year Published: 2016

Simulated effects of nitrogen saturation the global carbon budget using the IBIS model

Over the past 100 years, human activity has greatly changed the rate of atmospheric N (nitrogen) deposition in terrestrial ecosystems, resulting in N saturation in some regions of the world. The contribution of N saturation to the global carbon budget remains uncertain due to the complicated nature of C-N (carbon-nitrogen) interactions and diverse...

Lu, Xuehe; Jiang, Hong; Liu, Jinxun; Zhang, Xiuying; Jin, Jiaxin; Zhu, Qiuan; Zhang, Zhen; Peng, Changhui

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Year Published: 2016

Climate-driven increase of natural wetland methane emissions offset by human-induced wetland reduction in China over the past three decades

Both anthropogenic activities and climate change can affect the biogeochemical processes of natural wetland methanogenesis. Quantifying possible impacts of changing climate and wetland area on wetland methane (CH4) emissions in China is important for improving our knowledge on CH4 budgets locally and globally. However, their respective and...

Zhu, Qiuan; Peng, Changhui; Liu, Jinxun; Jiang, Hong; Fang, Xiuqin; Chen, Huai; Niu, Zhichun; Gong, Peng; Lin, Guanghui; Wang, Meng; Yang, Yanzheng; Chang, Jie; Ge, Ying; Xiang, Wenhua; Deng, Xiangwen; He, Jin-Sheng
Qiuan Zhu1, Changhui Peng1, Jinxun Liu, Hong Jiang, Xiuqin Fang, Huai Chen, Zhenguo Niu, Peng Gong, Guanghui Lin, Meng Wang, Han Wang, Yanzheng Yang, Jie Chang, Ying Ge, Wenhua Xiang, Xiangwen Deng & Jin-Sheng He. 2016. Climate-driven increase of natural wetland methane emissions offset by human-induced wetland reduction in China over the past three decades. Scientific Reports|6:38020|DOI: 10.1038/srep38020. pp 1-7.

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Year Published: 2016

Data on influence of atmospheric rivers on vegetation productivity and fire patterns in the southwestern US

In the southwestern US, the meteorological phenomenon known as atmospheric rivers (ARs) has gained increasing attention due to its strong connections to floods, snowpacks and water supplies in the West Coast states. Relatively less is known about the ecological implications of ARs, particularly in the interior Southwest, where AR storms are less...

Albano, Christine M.; Dettinger, Michael; Soulard, Christopher E.
Albano, C. M. , Dettinger, M.D., and Soulard, C.E., 2017, Data on influence of atmospheric rivers on vegetation productivity and fire patterns in the southwestern U.S. Geological Survey data release, http://dx.doi.org/10.5066/F71Z42KJ.

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Year Published: 2016

Mapping site index and volume increment from forest inventory, Landsat, and ecological variables in Tahoe National Forest, California, USA

High-resolution site index (SI) and mean annual increment (MAI) maps are desired for local forest management. We integrated field inventory, Landsat, and ecological variables to produce 30 m SI and MAI maps for the Tahoe National Forest (TNF) where different tree species coexist. We converted species-specific SI using adjustment factors. Then, the...

Huang, Shengli; Ramirez, Carlos; Conway, Scott; Kennedy, Kama; Kohler, Tanya; Liu, Jinxun
Huang, S., Ramirez, C., Conway, S., Kennedy, K., Kohler, T., and Liu, J., 2017. Mapping site index and volume increment from forest inventory, Landsat, and ecological variables in Tahoe National Forest, California, USA., Canadian Journal of Forest Research, 47: 113–124 dx.doi.org/10.1139/cjfr-2016-0209

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Year Published: 2016

Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model

Reducing uncertainty in data inputs at relevant spatial scales can improve tidal marsh forecasting models, and their usefulness in coastal climate change adaptation decisions. The Marsh Equilibrium Model (MEM), a one-dimensional mechanistic elevation model, incorporates feedbacks of organic and inorganic inputs to project elevations under sea-...

Byrd, Kristin B.; Windham-Myers, Lisamarie; Leeuw, Thomas; Downing, Bryan D.; Morris, James T.; Ferner, Matthew C.
Byrd, K. B., L. Windham-Myers, T. Leeuw, B. Downing, J. T. Morris, and M. C. Ferner. 2016. Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model. Ecosphere 7(11): e01582. 10.1002/ecs2.1582Byrd, K. B., L. Windham-Myers, T. Leeuw, B. Downing, J. T. Morris, and M. C. Ferner. 2016. Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model. Ecosphere 7(11): e01582. 10.1002/ecs2.1582

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Year Published: 2016

Community exposure to potential climate-driven changes to coastal-inundation hazards for six communities in Essex County, Massachusetts

IntroductionUnderstanding if and how community exposure to coastal hazards may change over time is crucial information for coastal managers tasked with developing climate adaptation plans. This report summarizes estimates of population and asset exposure to coastal-inundation hazards associated with sea-level-rise and storm scenarios in six...

Abdollahian, Nina; Ratliff, Jamie L.; Wood, Nathan J.
Abdollahian, Nina, Jones, J.L., and Wood, N.J., 2016, Community exposure to potential climate-driven changes to coastal-inundation hazards for six communities in Essex County, Massachusetts: U.S. Geological Survey Open-File Report 2016–1187, 87 p., http://dx.doi.org/10.3133/ofr20161187.

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Year Published: 2016

Exploiting differential vegetation phenology for satellite-based mapping of semiarid grass vegetation in the southwestern United States and northern Mexico

We developed and evaluated a methodology for subpixel discrimination and large-area mapping of the perennial warm-season (C4) grass component of vegetation cover in mixed-composition landscapes of the southwestern United States and northern Mexico. We describe the methodology within a general, conceptual framework that we identify as the...

Dye, Dennis G.; Middleton, Barry R.; Vogel, John M.; Wu, Zhuoting; Velasco, Miguel G.
Dye, D.G., Middleton, B.R., Vogel, J.M., Wu, Z. and Velasco, M., 2016. Exploiting Differential Vegetation Phenology for Satellite-Based Mapping of Semiarid Grass Vegetation in the Southwestern United States and Northern Mexico. Remote Sensing, 8(11), p.889.

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Year Published: 2016

Data release for journal article titled, "Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model"

Reducing uncertainty in data inputs at relevant spatial scales can improve tidal marsh forecasting models, and their usefulness in coastal climate change adaptation decisions. The Marsh Equilibrium Model (MEM), a one-dimensional mechanistic elevation model, incorporates feedbacks of organic and inorganic inputs to project elevations under sea-...

Byrd, Kristin B.
Byrd, K.B., 2016, Data release for journal article titled, "Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model": U.S. Geological Survey data release, https://dx.doi.org/10.5066/F76M34Z1.

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Year Published: 2016

Household evacuation characteristics in American Samoa during the 2009 Samoa Islands tsunami

Tsunamis represent significant threats to human life and development in coastal communities. This quantitative study examines the influence of household characteristics on evacuation actions taken by 211 respondents in American Samoa who were at their homes during the 29 September 2009 Mw 8.1 Samoa Islands earthquake and tsunami disaster. Multiple...

Apatu, Emma J. I.; Gregg, Chris E.; Wood, Nathan J.; Wang, Liang
Apatu, E., Gregg, E., Wood, N., and Wang, L., 2016, Household evacuation characteristics in American Samoa during the 2009 Samoa Islands tsunami, Disasters, 40(4):779-798.