Browsing by Author "Huang, L"

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    Dynamical and thermodynamical coupling between the North Atlantic subtropical high and the marine boundary layer clouds in boreal summer
    (Climate Dynamics, 2017-06-10) Wei, W; Li, W; Deng, Y; Yang, S; Jiang, JH; Huang, L; Liu, WT
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    Management of an annual fishery in the presence of ecological stress: The case of shrimp and hypoxia
    (Ecological Economics, 2011-02-15) Huang, L; Smith, MD
    The emergence of ecosystem-based management suggests that traditional fisheries management and protection of environmental quality are increasingly interrelated. Fishery managers, however, have limited control over most sources of marine and estuarine pollution and at best can only adapt to environmental conditions. We develop a bioeconomic model of optimal harvest of an annual species that is subject to an environmental disturbance. We parameterize the model to analyze the effect of hypoxia (low dissolved oxygen) on the optimal harvest path of brown shrimp, a commercially important species that is fished in hypoxic waters in the Gulf of Mexico and in estuaries in the southeastern United States. We find that hypoxia alters the qualitative pattern of optimal harvest and shifts the season opening earlier in the year; more severe hypoxia leads to even earlier season openings. Failure to adapt to hypoxia leads to greater losses when the effects of hypoxia are more severe. However, rent gains from adapting fishery management to hypoxia are relatively small compared to rent losses from the hypoxia effect itself. This suggests that it is critical for other regulatory agencies to control estuarine pollution, and fishery managers need to generate value from the fishery resources through other means such as rationalization. © 2010 Elsevier B.V.
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    Measuring welfare losses from hypoxia: The case of North Carolina brown shrimp
    (Marine Resource Economics, 2012-03-26) Huang, L; Nichols, LAB; Craig, JK; Smith, MD
    While environmental stressors such as hypoxia (low dissolved oxygen) are perceived as a threat to the productivity of coastal ecosystems, policy makers have little information about the economic consequences for fisheries. Recent work on hypoxia develops a bioeconomic model to harness microdata and quantify the effects of hypoxia on North Carolina's brown shrimp fishery. This work finds that hypoxia is responsible for a 12.9% decrease in NC brown shrimp catches from 1999-2005 in the Neuse River Estuary and Pamlico Sound, assuming that vessels do not react to changes in abundance. The current article extends this work to explore the full economic consequences of hypoxia on the supply and demand for brown shrimp. Demand analysis reveals that the NC shrimp industry is too small to influence prices, which are driven entirely by imports and other domestic U.S. harvest. Thus, demand is flat and there are no measurable benefits to shrimp consumers from reduced hypoxia. On the supply side, we find that the shrimp fleet responds to variation in price, abundance, and weather. Hence, the supply curve has some elasticity. Producer benefits of reduced hypoxia are less than a quarter of the computed gains from assuming no behavioral adjustment. Copyright © 2012 MRE Foundation, Inc.
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    On Finsler surfaces of constant flag curvature with a Killing field
    (Journal of Geometry and Physics, 2017-06-01) Bryant, RL; Huang, L; Mo, X
    © 2017 Elsevier B.V. We study two-dimensional Finsler metrics of constant flag curvature and show that such Finsler metrics that admit a Killing field can be written in a normal form that depends on two arbitrary functions of one variable. Furthermore, we find an approach to calculate these functions for spherically symmetric Finsler surfaces of constant flag curvature. In particular, we obtain the normal form of the Funk metric on the unit disk D 2 .