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Journal Articles Submitted or In Preparation
Shreve, C.M., G.S. Okin, T.H. Painter, in preparation, Spatial and temporal trends in fractional snow covered area and daytime land surface temperature in the Tibetan Plateau 2000-2007 using MODIS data. Environmental Science Letters.
Alvarez, L.J., H.E. Epstein, J. Li, G.S. Okin, submitted, The effects of grass reduction and increased wind erosion on photosynthesis rates of desert grassland plants. Oecologia.
Myint, S.W., A. Brazel, G.S. Okin, A. Buyantuyev, Submitted. Combined effects of impervious surface and vegetation cover on the urban heat island effect in a rapidly expanding desert city, IEEE Journal of Selected Topics in Earth Observations and Remote Sensing.
Ribeiro, N.S., H.H. Shugart, R.J. Swap and G.S. Okin, Resubmitted, Five-year period of fire regime in the miombo woodlands of Niassa Reserve, northern Mozambique, International Journal of Wildland Fire.
Stewart, J., G.S. Okin, A.J. Parsons, J. Wainwright, B. B. Bestelmeyer, W.H. Schlesinger. Submitted. Modelling Emergent Patterns of Dynamic Desert Ecosystems as a Function of Changing Landscape Connectivity: Part One – Theoretical Framework, Ecological Modelling.
Alvarez, L.J., G.S. Okin, H.E. Epstein, in preparation, Evaluation of current shear stress partitioning models in a sparsely vegetated ecosystem, Journal of Geophysical Research-Earth Surfaces.
Alvarez, L.J., G.S. Okin, H.E. Epstein, J. Li, in preparation, Spatial distribution of vegetation in an desert environment.
Alvarez, L.J., G.S. Okin, H.E. Epstein, J. Li, in preparation, Community responses to wind erosion.
Peer-Reviewed Journal Articles and Articles in Press
Li, J., G.S. Okin, H.E. Epstein, in press, Effects of enhanced wind erosion on surface soil texture and characteristics of windblown sediments, Journal of Geophysical Research.
Ravi, Sujith, P. D'Odorico, L. Wang, C. White, G.S. Okin, S.A. Macko, S. Collins, in press, Post-fire resource redistribution in desert grasslands: A possible negative feedback on land degradation, Ecosystems.
Shreve, C.M., G.S. Okin, T.H. Painter, In Press, Introduction of a new optical snow index and validation of optical snow indices for estimating fractional snow cover in the Western Tibetan Plateau. Journal of Glaciology.
Li, J., G.S. Okin, L.J. Alvarez, and H.E. Epstein, in press, Sediment deposition and soil nutrient heterogeneity in two desert grassland ecosystems, southern New Mexico, Plant and Soil.
Wang, L., P. D’Odorico, G.S. Okin, S. Macko, In Press, Isotopic composition and anion chemistry of soil profiles along the Kalahari Transect, Journal of Arid Environments.
Wang, L., Okin, G.S., Macko, S.A., In Press, Satellite prediction of soil δ13C distributions in a southern African savanna, Journal of Geochemical Exploration.
Okin, G.S. A.J. Parsons, J. Wainwright, J.E. Herrick, B.T. Bestelmeyer, D.P.C. Peters, and E.L. Fredrickson, 2009, Do changes in connectivity explain desertification? BioScience, 59(3) 237-244.
Wang, L., G.S. Okin, K. K. Caylor, S. Macko, 2009 Spatial heterogeneity and sources of soil carbon in southern African savannas, Geoderma, 149, 402-408.
Okin, G. S., P. D'Odorico, and S. R. Archer, 2009, Impact of feedbacks on Chihuahuan desert grasslands: Transience and metastability, J. Geophysical Research, 114, G01004, doi:10.1029/2008JG000833.
Mahowald, N., T.D. Jickells, A.R. Baker, P. Artaxo, C.R. Benitez-Nelson, G. Bergametti, T.C. Bond, Y. Chen, D.D. Cohen, B. Herut, N. Kubilay, R. Losno, C. Luo, W. Maenhaut, K.A. McGee, G.S. Okin, R.L. Siefert, S. Tsukuda, 2008. The global distribution of atmospheric phosphorus deposition and anthropogenic impacts, Global Biogeochemical Cycles. 22, GB4026, 10.1029/2008GB003240.
Myint, S., G.S. Okin, In Press, Modeling urban land covers using multiple endmember spectral mixture analysis, International Journal of Remote Sensing.
Elmore, A.J., J.M. Kaste, G.S. Okin, M.S. Fantle, 2008. Groundwater influences on atmospheric dust generation in deserts, Journal of Arid Environments, 72(10), 1753-1756.
Marshall, J.D., J.M Blair, D.P.C. Peters, G.S. Okin, A. Rango, M. Williams, 2008, Predicting and understanding ecosystem responses to climate change at continental scales, Frontiers in Ecology and the Environment, 6(5) pp 273-280. doi: 10.1890/070165
Li, J., G.S. Okin, L.J. Alvarez, and H.E. Epstein, in press, Effects of Wind Erosion on the Spatial Heterogeneity of Soil Nutrients in a Desert Grassland of Southern New Mexico, Biogeochemistry, 10.1007/s10533-008-9195-6.
Okin, G.S., N. Mladenov, L. Wang, D. Cassel, K. K. Caylor, and S. Ringrose, 2008, Spatial patterns of soil nutrients in two southern African savannas, JGR-Biogeosciences, 113:G02011.
Estes, L.D., G.S. Okin, A.G. Mwangi, H.H. Shugart, 2008, Identifying a large forest herbivore’s habitat: a multi-scale approach combining field data and imagery from four sensors, Remote Sensing of Environment, 112: 2033-2050.
Okin, G. S., 2008, A new model of wind erosion in the presence of vegetation, Journal of Geophysical Research-Earth Surface, 113, F02S10, doi:10.1029/2007JF000758.
Ravi, S., D’Odorico, P., and G.S. Okin, 2007, Hydrologic and aeolian controls on vegetation patterns in arid landscapes, Geophysical Research Letters, 34, L24S23, doi:10.1029/2007GL031023.
D’Odorico, P., K.K. Caylor, G.S. Okin, T.M. Scanlon, 2007, On soil moisture-vegetation feedbacks in dryland plant ecosystems, JGR-Biogeosciences, 112, G04010, DOI: 10.1029/2006JG000379
Li, J., G.S. Okin, L.J. Alvarez, and H.E. Epstein, 2007, Quantitative assessment of wind erosion and soil nutrient loss in desert grasslands of the southwestern United States, Biogeochemistry, 10.1007/s10533-007-9142-y, 85(3) 317-332.
Diekmann, L., D. Lawrence, and G.S. Okin, 2007. Changes in the spatial variation of soil properties following shifting cultivation in a Mexican dry tropical forest, Biogeochemistry, 10.1007/s10533-007-9107-1.
Okin, G.S., 2007,Relative Spectral Mixture Analysis - a multitemporal index of total vegetation cover, Remote Sensing of Environment, 106(4), 467-479.
Wang, L., G.S. Okin, J. Wang, H.E. Epstein, and S. Macko, 2007, Predicting 15N concentration from Reflectance Spectra (400-2500 nm) at Leaf and Canopy Scales, Geophysical Research Letters, 35, L02401, doi:10.1029/2006GL028506
Scull, P. and G.S. Okin, 2007, Sampling challenges posed by continental scale soil landscape modeling, Science of the Total Environment, 372, 645-656.
McGlynn, I.O., G.S. Okin,, 2006, Characterization of shrub distribution using high spatial resolution remote sensing: ecosystem implication for a former Chihuahuan Desert grassland. Remote Sensing of Environment, 101, 554-566.
Ravi, S., T.M. Zobeck, T.M. Over, G.S. Okin, and P. D’Odorico, 2006, On the effect of wet bonding forces in air-dry soils on threshold friction velocity of wind erosion, Sedimentology, doi: 10.1111/j.1365-3091.2006.00775.x,
Okin, G.S., D.A. Gillettte, and J.E. Herrick, 2006, Multi-scale controls on and consequences of aeolian processes in landscape change in arid and semiarid environments, Journal of Arid Environments, 65, 253-275.
Mahowald N.M, P.E. Artaxo, A.R. Baker, D. Jickells, G.S. Okin, J.T. Randerson, and A.R. Townsend, 2005. Impacts of biomass burning emissions and land use on Amazonian atmospheric phosphorus cycling and deposition, Global Biogeochemical Cycles, 19, No. 4, GB4030, 10.1029/2005GB002541.
Scull, P., G. Okin, O.A. Chadwick, and J. Franklin, 2005. A comparison of methods to predict soil surface texture in an alluvial basin, Professional Geographer, 57(3), 423-437.
Ballantine, J.A.C., G. S. Okin, D.E. Prentiss, and D.A. Roberts, 2005. Mapping North African landforms using continental-scale unmixing of MODIS imagery, Remote Sensing of Environment, 47(4) 470-483.
Okin, G.S., 2005. Dependence of wind erosion on surface heterogeneity, Journal of Geophysical Research, 110, D11208.
Okin, G.S., and T.H. Painter, 2004, Effect of grain size on spectral reflectance of sandy desert surfaces, Remote Sensing of Environment, 89(3) pp 272-280.
Okin, G.S., N. M. Mahowald, O.A. Chadwick, P.E. Artaxo, 2004, The impact of desert dust on the biogeochemistry of phosphorus in terrestrial ecosystems, Global Biogeochemical Cycles, 18(2), 10.1029/2003GB002145.
Okin, G.S., and M.C. Reheis, 2002, An ENSO predictor of wind erosion and dust emission in the southwest United States: Geophysical Research Letters. V 29, no. 9. 10.1029/2001GL014494.
Okin, G.S., W.J. Okin, B. Murray, and D.A. Roberts, 2001, Practical limits on hyperspectral vegetation discrimination in arid and semiarid environments: Remote Sensing of Environment, v. 77, 212-225.
Okin, G.S., and D.A. Gillette, 2001, Distribution of vegetation in wind-dominated landscapes: Implications for wind erosion modeling and landscape processes: Journal of Geophysical Research, v. 106, 9673-9683.
Okin, G.S., W.H. Schlesinger, and B. Murray, 2001, Degradation of Sandy Arid Shrubland Environments: Observations, process modeling and management implications: Journal of Arid Environments, v. 47, 123-144.
Refereed Book Chapters
Okin, G.S., 2002, Toward a Unified View of Biophysical Land Degradation Processes in Arid and Semi-arid Lands, in Global Desertification: Do Humans Cause Deserts? J.F. Reynolds & D.M. Stafford Smith, eds. Dahlem University Press, Berlin, pp. 95-109.
Robbins, P.F., N. Abel, H. Jiang, M. Mortimore, M. Mulligan, G.S. Okin, D.M. Stafford Smith, B.L. Turner II, 2002, Desertification at the community scale: sustaining dynamic human-environment systems in Global Desertification: Do Humans Cause Deserts? J.F. Reynolds & D.M. Stafford Smith, eds. Dahlem University Press, Berlin, pp. 326-355.
Okin, G.S., B. Murray, and W.H. Schlesinger, 2001, Desertification in an arid shrubland in the southwestern United States: Process modeling and validation, in Land Degradation: Papers Selected from Contributions to the Sixth meeting of the International Geographical Union's Commission on Land Degradation and Desertification, Perth, Western Australia, 20-28 September 1999, pp. 53-70, edited by A. Conacher, Kluwer Academic Publishers, Dordrecht.