Decoupling Relationship between Cultivated Land Use Intensity and Carbon Emissions:A Case Study of 25 Cities in the Middle Reaches of the Yellow River Basin
The purposes of this study are to clarify the feedback relationship between cultivated land use intensity(CLUI)and cultivated land use carbon emissions(CLUCE)and to assess the potential for achieving low-carbon agricultural growth in the middle Yellow River Basin by analyzing the spatial and temporal patterns of CLUI and CLUCE between 2005 and 2020,as well as evaluating their decoupling relationship to inform sustainable land use practices.The research methods are as follows.Focusing on 25 cities in the middle section of the Yellow River Basin,we calculated carbon emissions from cultivated land use based on the IPCC emission factor method,and the relationship between cultivated land use intensity and carbon emissions was evaluated using the Tapio decoupling model.Decoupling elasticity indices were calculated for three periods:2005-2010,2010-2015 and 2015-2020.The research results show that:1)between 2005 and 2020,the cultivated land use intensity in the Mid-Yellow River Basin continuously increased,rising from 0.42 to 0.66,accompanied by a pronounced spatial clustering effect.The southern cities exhibited stable high CLUI levels(hot spots),while the western cities showed lower CLUI(cold spots)that gradually shrank over time.2)The carbon emissions from cultivated land use exhibited an"inverted U-shaped"trend,first rising and then falling,with a spatial distribution pattern characterized by"high in the south,low in the north and west,"and neighboring cities showing similar levels of carbon emission intensity.3)The relationship between cultivated land use intensity and carbon emissions in the Mid-Yellow River Basin experienced three states,i.e.,weak decoupling,expansive negative decoupling and strong decoupling,signifying a transition from an undesirable state to a desirable one.In conclusion,decoupling relationship between CLUI and carbon emissions shows significant differences in different stages and regions,and the differentiated regulation measurements for low-carbon development should be undertaken according to the context-specific conditions.
cultivated land usecarbon emissiondecoupling analysisthe middle reaches of Yellow River Basin
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