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Gregory S. Okin
Researcher at University of California, Los Angeles
Publications - 165
Citations - 9741
Gregory S. Okin is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Vegetation & Aeolian processes. The author has an hindex of 47, co-authored 150 publications receiving 8217 citations. Previous affiliations of Gregory S. Okin include New Mexico State University & California Institute of Technology.
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Journal ArticleDOI
Global distribution of atmospheric phosphorus sources, concentrations and deposition rates, and anthropogenic impacts
Natalie M. Mahowald,Tim Jickells,Alex R. Baker,Paulo Artaxo,Claudia R. Benitez-Nelson,Gilles Bergametti,Tami C. Bond,Ying Chen,David D. Cohen,Barak Herut,Nilgun Kubilay,Rémi Losno,Chao Luo,Willy Maenhaut,Kenneth A. McGee,Gregory S. Okin,Ronald L. Siefert,Seigen Tsukuda +17 more
TL;DR: A worldwide compilation of atmospheric total phosphorus (TP) and phosphate (PO4) concentration and deposition flux observations are combined with transport model simulations to derive the global distribution of concentrations and fluxes of TP and PO4.
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Impact of desert dust on the biogeochemistry of phosphorus in terrestrial ecosystems
TL;DR: In this paper, the authors evaluate the importance of atmospheric P inputs to the world's soils by estimating the total soil P turnover time with respect to dustborne P additions, ranging from ∼104 to ∼107 years.
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Practical limits on hyperspectral vegetation discrimination in arid and semiarid environments
TL;DR: In this paper, the authors used multiple end-members spectral mixture analysis (MESMA), high-quality field spectra, and AVIRIS data to determine how well SMA can retrieve vegetation and soil information in areas of low vegetation cover.
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A synthetic review of feedbacks and drivers of shrub encroachment in arid grasslands
TL;DR: In this article, the authors introduce a simplistic modelling framework that can integrate the various drivers to explain the emergence of bistability for shrub-encroached grassland systems and identify the basic stages in the transition from grassland to shrubland.
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Quantitative effects of vegetation cover on wind erosion and soil nutrient loss in a desert grassland of southern New Mexico, USA
TL;DR: In this paper, the authors investigated two basic relationships on vegetation manipulation (grass cover reduction) plots at the Jornada Experimental Range in southern New Mexico: (1) wind erosion rates (horizontal mass flux and dust emission) versus vegetative cover, and (2) nutrient loss versus vegetation cover.