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Application of the Static Headland-Bay Beach Concept to a Sandy Beach: A New elliptical model

Journal of Ocean University of China 2020年第1期19卷 81-89页

作者： LI Bing ZHUANG Zhenye CAO Lihua DU Fengchao College of Marine Geosciences Ocean University of ChinaQingdao 266100China Island Research Center Ministry of Natural ResourcesPingtan 350400China Key Laboratory of Submarine Science and Exploration Technology Education Ministry of ChinaQingdao 266100China Shandong Marine Resources and Environment Institute Shandong Provincial Key Laboratory of Restoration for Marine EcologyYantai 264006China

The headland-bay beach is one of the most common coastal types in the *** morphology reflects the changes that occurred during long-term evolution of the sandy *** headland-bay beach models have been proposed to simulate the coastline’s configuration in *** this paper,a new elliptical model is proposed,described,and *** the east coast of Laizhou Bay in Shandong Province from Longkou Port to Diaolongzui,four typical headland-bay beaches have developed,and four headland-bay beach models are used in this paper to simulate the morphology of these beaches to assess the applicability of each *** simulation results of the elliptical model verify that it is applicable to the study *** addition,the elliptical model is easy to *** simulation and field investigations,we concluded that most of the coastal segments in this area will remain in an erosion state,and the human activity has a significant impact on the shoreline’s evolution.

关键词： static headland-bay beach concept elliptical model sandy beach coastal erosion east coast of Laizhou Bay

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Estimation of Net Surface Shortwave Radiation from Land Surface Temperature in Regional Scale

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Wuhan University Journal of Natural Sciences 2011年第4期16卷 357-362页

作者： LENG Peit SONG Xiaoning LI Zhaoliang College of Resources and Environment Graduate School of Chinese Academy of Sciences Beijing 100049 China Institute of Geographic Sciences and Natural Resources Research Beijing 100101 China

The method to estimate NSSR （net surface shortwave radiation） from LST （land surface temperature） in regional scale is discussed. First, an elliptical model between the time series of normalized LST and NSSR was developed using the daily evolution of LST and NSSR. Second, time series of LST and NSSR were simulated by common land model （CoLM） and were proved to be of high accuracy. On the basis of these, a non-linear least square ellipse fitting using the genetic algorithm method was used to fit the normalized LST and NSSR. Finally, LST was inverted using MODIS （moderate resolution imaging spectroradiometer） data with the split-window algorithm, and the regional NSSR was then estimated with LST and an elliptical model. The validation result shows that the derived average NSSR of 50×50 pixels of MODIS data was quite close to the observed data, and the distribution was reasonable, which indicates that the proposed method was capable of estimating NSSR on a regional scale.

关键词： net surface shortwave radiation land surface temperature elliptical model common land model (CoLM) moderate resolution imaging spectroradiometer (MODIS)

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