Spatio-temporal impacts of extreme heat on economic growth in the Yellow River Basin
Received date: 2024-09-23
Revised date: 2025-04-23
Online published: 2025-05-23
Supported by
National Natural Science Foundation of China(42471467)
National Natural Science Foundation of China(42001115)
Since the 1950s, the frequency, intensity, and spatial extent of extreme heat events have increased significantly. Beyond the broader economic consequences of global warming, extreme heat imposes independent and substantial influences on economic growth. Neglecting its effects could lead to substantial underestimations of climate-driven economic losses and regional disparities. The Yellow River Basin (YRB), a crucial ecological security barrier and key pilot region for high-quality development, is home to predominantly energy- and labor-intensive industries that are particularly vulnerable to extreme heat. Understanding the historical impacts of extreme heat on economic growth is essential for assessing the region's climate resilience and formulating adaptation strategies. To address this, this study constructed a county-level GDP dataset for the YRB spanning 30 years (1992-2021) by integrating nighttime light data and machine learning techniques. Extreme heat, average temperature, and temperature variability were systematically incorporated into a climate econometric model to analyze the nonlinear and persistent effects of extreme heat on economic growth. Additionally, projections from the Coupled Model Inter-comparison Project Phase 6 (CMIP6) further enable the quantification of economic losses attributable to anthropogenic extreme heat. The key findings reveal that: (1) As a county's annual average temperature rises, the marginal effect of extreme heat shifts from being statistically insignificant to significantly negative, with an inflection point at 6.7 ℃. Counties experiencing significant economic losses due to extreme heat constitute approximately 94.9% of the YRB. (2) The marginal effect of extreme heat tends to accumulate and intensify within the first three years' post-event, may rebound in the fourth year, and typically dissipate by the fifth year. However, when a county's annual average temperature exceeds 11.1 ℃, extreme heat can cause permanent damage to economic growth. (3) Economic losses attributed to anthropogenic extreme heat totaled approximately 2 billion yuan in 2010 but surged to around 142 billion yuan by 2020, representing about 1.8% of that year's GDP:A nearly 70-fold increase. The cumulative economic loss from 1998 to 2020 amounted to approximately 566 billion yuan.
ZHANG Hang , GUO Yuchen , ZHANG Hongjuan , GAO Wenkai , LI Yurui , DONG Guanpeng . Spatio-temporal impacts of extreme heat on economic growth in the Yellow River Basin[J]. Acta Geographica Sinica, 2025 , 80(5) : 1353 -1369 . DOI: 10.11821/dlxb202505013
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