Modeling Actual Evapotranspiration With Routine
Meteorological Variables In The Data-Scarce
Region Of The Tibetan Plateau: Comparisons
And Implications,
2015
Chinese Academy of Sciences, Beijing, China
Modeling Actual Evapotranspiration With Routine Meteorological Variables In The Data-Scarce Region Of The Tibetan Plateau: Comparisons And Implications, Ning Ma, Yinsheng Zhang, Chong-Yu Xu, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
Quantitative estimation of actual evapotranspiration (ETa) by in situ measurements and mathematical modeling is a fundamental task for physical understanding of ETa as well as the feedback mechanisms between land and the ambient atmosphere. However, the ETa information in the Tibetan Plateau (TP) has been greatly impeded by the extremely sparse ground observation network in the region. Approaches for estimating ETa solely from routine meteorological variables are therefore important for investigating spatiotemporal variations of ETa in the data-scarce region of the TP. Motivated by this need, the complementary relationship (CR) and Penman-Monteith approaches were evaluated against in …
Remote Sensing Of Drought: Progress, Challenges
And Opportunities,
2015
University of California, Irvine
Remote Sensing Of Drought: Progress, Challenges And Opportunities, A. Aghakouchak, A. Farahmand, F. S. Melton, J. Teixeira, M. C. Anderson, Brian D. Wardlow, C. R. Hain
School of Natural Resources: Faculty Publications
This review surveys current and emerging drought monitoring approaches using satellite remote sensing observations from climatological and ecosystem perspectives. We argue that satellite observations not currently used for operational drought monitoring, such as near-surface air relative humidity data from the Atmospheric Infrared Sounder mission, provide opportunities to improve early drought warning. Current and future satellite missions offer opportunities to develop composite and multi-indicator drought models. While there are immense opportunities, there are major challenges including data continuity, unquantified uncertainty, sensor changes, and community acceptability. One of the major limitations of many of the currently available satellite observations is their short …
Evaluating The Complementary Relationship Of
Evapotranspiration In The Alpine Steppe Of The Tibetan Plateau,
2015
Chinese Academy of Sciences
Evaluating The Complementary Relationship Of Evapotranspiration In The Alpine Steppe Of The Tibetan Plateau, Ning Ma, Yinsheng Zhang, Jozsef Szilagyi, Yanhong Guo, Jianqing Zhai, Haifeng Gao
School of Natural Resources: Faculty Publications
The complementary relationship (CR) of evapotranspiration allows the estimation of the actual evapotranspiration rate (ETa) of the land surface using only routine meteorological data, which is of great importance in the Tibetan Plateau (TP) due to its sparse observation network. With the highest in situ automatic climate observation system in a typical semiarid alpine steppe region of the TP, the wind function of Penman was replaced by one based on the Monin-Obukhov Similarity theory for calculating the potential evapotranspiration rate (ETp); the Priestley-Taylor coefficient, a, was estimated using observations in wet days; and the slope of …
Complementary-Relationship-Based 30 Year Normals
(1981–2010) Of Monthly Latent Heat Fluxes Across The
Contiguous United States,
2015
University of Nebraska - Lincoln
Complementary-Relationship-Based 30 Year Normals (1981–2010) Of Monthly Latent Heat Fluxes Across The Contiguous United States, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
Thirty year normal (1981–2010) monthly latent heat fluxes (ET) over the conterminous United States were estimated by a modified Advection-Aridity model from North American Regional Reanalysis (NARR) radiation and wind as well as Parameter-Elevation Regressions on Independent Slopes Model (PRISM) air and dew-point temperature data. Mean annual ET values were calibrated with PRISM precipitation (P) and validated against United States Geological Survey runoff (Q) data. At the six-digit Hydrologic Unit Code level (sample size of 334) the estimated 30 year normal runoff (P – ET) had a bias of 18 mm yr-1, a root-mean-square error of …
Atmospheric Circulation Processes Contributing
To A Multidecadal Variation In Reconstructed
And Modeled Indian Monsoon Precipitation,
2015
University of Nebraska - Lincoln
Atmospheric Circulation Processes Contributing To A Multidecadal Variation In Reconstructed And Modeled Indian Monsoon Precipitation, Qianru Wu, Qi Hu
School of Natural Resources: Faculty Publications
An analysis of the recently reconstructed gridded May–September total precipitation in the Indian monsoon region for the past half millennium discloses significant variations at multidecadal timescales. Meanwhile, paleo-climate modeling outputs from the National Center for Atmospheric Research Community Climate System Model 4.0 show similar multidecadal variations in the monsoon precipitation. One of those variations at the frequency of 40–50 years per cycle is examined in this study. Major results show that this variation is a product of the processes in that the meridional gradient of the atmospheric enthalpy is strengthened by radiation loss in the high-latitude and polar region. Driven …
Combined Analysis Of Soil Moisture Measurements
From Roving And Fixed Cosmic Ray Neutron Probes
For Multiscale Real-Time Monitoring,
2015
University of Nebraska-Lincoln
Combined Analysis Of Soil Moisture Measurements From Roving And Fixed Cosmic Ray Neutron Probes For Multiscale Real-Time Monitoring, Trenton E. Franz, Tiejun Wang, William Avery, Catherine E. Finkenbiner, Luca Brocca
School of Natural Resources: Faculty Publications
Soil moisture partly controls land-atmosphere mass and energy exchanges and ecohydrological processes in natural and agricultural systems. Thus, many models and remote sensing products continue to improve their spatiotemporal resolution of soil moisture, with some land surface models reaching 1 km resolution. However, the reliability and accuracy of both modeled and remotely sensed soil moisture require comparison with ground measurements at the appropriate spatiotemporal scales. One promising technique is the cosmic ray neutron probe. Here we further assess the suitability of this technique for real-time monitoring across a large area by combining data from three fixed probes and roving surveys …
Integrating Hands-On Undergraduate Research In An Applied Spatial Science Senior Level Capstone Course,
2015
Arthur Temple College of Forestry and Agriculture, Stephen F. Austin State University
Integrating Hands-On Undergraduate Research In An Applied Spatial Science Senior Level Capstone Course, David Kulhavy, Daniel Unger, I-Kuai Hung, David Douglass
Faculty Publications
A senior within a spatial science Ecological Planning capstone course designed an undergraduate research project to increase his spatial science expertise and to assess the hands-on instruction methodology employed within the Bachelor of Science in Spatial Science program at Stephen F Austin State University. The height of 30 building features estimated remotely with LiDAR data, within the Pictometry remotely sensed web-based interface, and in situ with a laser rangefinder were compared to actual building feature height measurements. A comparison of estimated height with actual height indicated that all three estimation techniques tested were unbiased estimators of height. An ANOVA, conducted …
Nephrotoxic Contaminants In Drinking Water And Urine, And Chronic Kidney Disease In Rural Sri Lanka,
2015
Duke University
Nephrotoxic Contaminants In Drinking Water And Urine, And Chronic Kidney Disease In Rural Sri Lanka, Tewodros Rango, Marc Jeuland, Herath Manthrithilake, Peter G. Mccornick
Daugherty Water for Food Global Institute: Faculty Publications
Chronic kidney disease of unknown (“u”) cause (CKDu) is a growing public health concern in Sri Lanka. Prior research has hypothesized a link with drinking water quality, but rigorous studies are lacking. This study assesses the relationship between nephrotoxic elements (namely arsenic (As), cadmium (Cd), lead (Pb), and uranium (U)) in drinking water, and urine samples collected from individuals with and/or without CKDu in endemic areas, and from individuals without CKDu in nonendemic areas. All water samples—from a variety of source types (i.e., shallow and deep wells, springs, piped, and surface water)—contained extremely low concentrations of nephrotoxic elements, and all …
Demonstration Of A Daily High-Resolution (375-M) Alexi Evapotranspiration Product For The Nena Region,
2015
NASA Marshall Space Flight Center
Demonstration Of A Daily High-Resolution (375-M) Alexi Evapotranspiration Product For The Nena Region, Christopher Hain, Martha C. Anderson, Mitch Schull, Christopher M.U. Neale
Daugherty Water for Food Global Institute: Faculty Publications
While the current constellation of geostationary sensors provides near-global coverage (60N to 60S) – it requires merging data from 7 satellites [resolving time differences; view angles; atmospheric correction]. Polar orbiting sensors such as MODIS and VIIRS provide daily global coverage of LST at higher resolutions than GEO sensors but at only two times per day.
Assessment Of Village Chicken Production Systems In Kambata Tambaro And Wolaita Zones, Snnpr, Ethiopia,
2015
Areka Agricultural Research Center
Assessment Of Village Chicken Production Systems In Kambata Tambaro And Wolaita Zones, Snnpr, Ethiopia, Aman Getiso, Fitsum Tessema, Mesfin Mekonnen, Addisu Jimma, Bereket Zeleke
Daugherty Water for Food Global Institute: Faculty Publications
The study was conducted in four woredas (Damot Gale,Of a, Angacha and Hadero Tunto) the first two of them found in Wolaita zone and two of them in Kambata Tambaro Zone of SNNPR, Ethiopia respectively. A cross-sectional survey was conducted in the study areas to assess village chicken production systems, productive and reproductive performance of village chicken and identifying constraints to village chicken production. Stratified random sampling technique was used to select 240 farming households and administer a pre-tested and structured questionnaire. The results showed that the mean age of interviewed farmers was 37.8±9.3 years; average family size & chicken …
Yield Gap Analysis Of Field Crops: Methods And Case Studies,
2015
South Australian Research & Development Institute
Yield Gap Analysis Of Field Crops: Methods And Case Studies, V. O. Sadras, Kenneth Cassman, Patricio Grassini, W. G.M. Bastiaanssen, A. G. Laborte, A. E. Milne, G. Sileshi, P. Steduto
Daugherty Water for Food Global Institute: Faculty Publications
The challenges of global agriculture have been analysed exhaustively and the need has been established for sustainable improvement in agricultural production aimed at food security in a context of increasing pressure on natural resources. Whereas the importance of R&D investment in agriculture is increasingly recognised, better allocation of limited funding is essential to improve food production. In this context, the common and often large gap between actual and attainable yield is a critical target. Realistic solutions are required to close yield gaps in both small and large scale cropping systems worldwide; to make progress in this direction, we need (1) …
Desktop Study Report : Linking Management Of Natural Coastal Resources To Socioeconomic Development,
2015
World Maritime University
Desktop Study Report : Linking Management Of Natural Coastal Resources To Socioeconomic Development, Henrik Nilsson, Dariusz P. Fey, Piotr Margonski, Michael Van Laak, Nardine Stybel
HERRING
The HERRING Desktop Study Report links management of natural coastal resources to socioeconomic development.
Bringing The Passion Back: Using Your Expertise To Gain Experience, Improve Motivation, And Create Real Change In Global Agriculture,
2015
University of Nebraska - Lincoln
Bringing The Passion Back: Using Your Expertise To Gain Experience, Improve Motivation, And Create Real Change In Global Agriculture, J.M.D. Motschenbacher
School of Natural Resources: Faculty Publications
No abstract provided.
The Bathtub Ring. Shrinking Lake Mead: Impacts On Water Supply, Hydropower, Recreation And The Environment,
2015
University of Colorado Law School
The Bathtub Ring. Shrinking Lake Mead: Impacts On Water Supply, Hydropower, Recreation And The Environment, Ning Jiang, Season Martin, Julia Morton, Skyler Murphy, Colorado River Governance Initiative
Books, Reports, and Studies
4 pages (includes color illustrations and color maps).
2015 Nebraska Water
Monitoring Programs Report,
2015
NDEQ
2015 Nebraska Water Monitoring Programs Report, Marty Link, Ryan Chapman
Nebraska Department of Environmental Quality: Reports
The Nebraska Department of Environmental Quality (NDEQ) is charged with monitoring, assessing, and to the extent possible, managing the state’s water resources. The purpose of this work is to protect and maintain high quality water and encourage or execute activities to improve poor water quality. Monitoring is done on nearly 17,000 miles of flowing rivers and streams, more than 134,000 acres of surface water in lakes and reservoirs, as well as the vast storage of groundwater in Nebraska’s aquifers.
The Value Of Water In The Colorado River Basin: A Snapshot Of A Fluid Landscape,
2015
University of Colorado Law School
The Value Of Water In The Colorado River Basin: A Snapshot Of A Fluid Landscape, Brian Annes, Colorado River Governance Initiative
Books, Reports, and Studies
33 pages.
A Look At The Interim Guidelines At Their Mid-Point: How Are We Doing?,
2015
University of Colorado Law School
A Look At The Interim Guidelines At Their Mid-Point: How Are We Doing?, Colorado River Research Group
Books, Reports, and Studies
4 pages.
Daily Soil Surface Co2 Flux During Non-Flooded Periods In Flood-Irrigated Rice Rotations,
2015
University of Nebraska - Lincoln
Daily Soil Surface Co2 Flux During Non-Flooded Periods In Flood-Irrigated Rice Rotations, J. M. Motschenbacher, K. R. Brye, M. M. Anders, E. E. Gbur, N. A. Slaton, M. A. Evans-White
School of Natural Resources: Faculty Publications
No abstract provided.
Atmospheric Responses To North Atlantic Sst Anomalies In Idealized Experiments. Part I: Northern Hemispheric Circulation,
2015
University of Nebraska-Lincoln
Atmospheric Responses To North Atlantic Sst Anomalies In Idealized Experiments. Part I: Northern Hemispheric Circulation, Michael C. Veres, Qi Hu
School of Natural Resources: Faculty Publications
Idealized model experiments using the NCAR CESM1.0.5 under equinox conditions are designed and performed to address two fundamental questions about the effects of the sea surface temperature (SST) variation associated with the Atlantic multidecadal oscillation (AMO) on circulation and precipitation in North America and Europe: 1) Is the observed relationship between the AMOSST and the warm-season precipitation in North America a statistical coincidence? and 2)Why is the response of negative precipitation anomaly to warm SST in the AMO fairly uniform across most of North America, whereas the positive precipitation anomaly in the cold SST rather spotty? Model experiments are done …
Estimation Of Crop Gross Primary Production (Gpp): Ii. Do Scaledmodis Vegetation Indices Improve Performance?,
2015
Universities Space Research Association
Estimation Of Crop Gross Primary Production (Gpp): Ii. Do Scaledmodis Vegetation Indices Improve Performance?, Qingyuan Zhang, Yen-Ben Cheng, Alexei I. Lyapustin, Yujie Wang, Xiaoyang Zhang, Andrew E. Suyker, Shashi Verma, Yanmin Shuai, Elizabeth M. Middleton
School of Natural Resources: Faculty Publications
Satellite remote sensing estimates of gross primary production (GPP) have routinely been made using spectral vegetation indices (VIs) over the past two decades. The Normalized Difference Vegetation Index(NDVI), the Enhanced Vegetation Index (EVI), the green band Wide Dynamic Range Vegetation Index(WDRVIgreen), and the green band Chlorophyll Index (CIgreen) have been employed to estimate GPP under the assumption that GPP is proportional to the product of VI and photosynthetically active radiation (PAR)(where VI is one of four VIs: NDVI, EVI, WDRVIgreen, or CIgreen). However, the empirical regressions between VI*PAR and GPP measured locally …
