SPATIOTEMPORAL DIFFERENCES AND INFLUENCING FACTORS OF MARINE ECO-EFFICIENCY IN CITIES AROUND BOHAI SEA FROM THE PERSPECTIVE OF CARBON SINK
To promote the high-quality development of the ocean and build a strong ocean country,based on the panel data of 16 prefecture-level cities around the Bohai Sea,China,from 2011 to 2020,the undesired output super-efficiency SBM(slacks-based measure)model and the Tobit model were used to measure the marine ecological efficiency,clarify the spatiotemporal evolution characteristics,and to conduct an empirical analysis on the influencing factors.Results show that:(1)from the perspective of time series evolution,the average marine ecological efficiency of the prefecture-level cities showed a fluctuating upward trend from 2011 to 2020,and there is still much room for improvement;(2)from the perspective of spatial differences,the spatial distribution pattern of marine ecological efficiency in the prefecture-level cities has developed from a disordered state in 2011 during which high and low ecological efficiency levels distributed alternately to an orderly development in 2020 during which two zones of higher ecological efficiency are formed spatially;(3)the decomposition of the Malmquist index shows that there was a lack of motivation for pure technical efficiency as a single driving force for efficiency growth in the early stages of the study.In the later stage of the study,from 2016 to 2020,the dual driving forces by technological progress and scale efficiency ensured the improvement of marine ecological efficiency;(4)the level of regional economic development and carbon emission reduction had a significant positive impact on the marine ecological efficiency of the prefecture-level cities;environmental regulation and marine industrial structure had a significant negative correlation;the level of marine science and technology had a positive impact but did not pass the significance test.In the future,we must focus on the development of marine science and technology,promote green and low-carbon transformation,strengthen inter-regional cooperation,and improve the foundation of marine development to promote high-quality marine development in the Bohai Rim region.
marine eco-efficiencyundesirable outputprefecture-level city around Bohai SeaTobit regression modelmarine carbon sink
NETL
NSTL
万方数据
