Spatial Distribution and Trends of Heat Stress in Vietnam

Q3 Environmental Science
Nhung C. Vu, T. Ngo‐Duc
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引用次数: 0

Abstract

This study investigates the spatial distribution and trend of heat stress in Vietnam using data from 68 meteorological stations across the country’s seven climatic sub-regions between 1979 and 2018. Daily maximum wet-bulb temperature (TWmax), an indicator of heat stress, was computed based on the daily maximum air temperature (Tx) and relative humidity at 13:00 LST (RH13). Results indicate a strong positive correlation (>0.97) between daily TWmax and Tx and a weaker relationship between daily TWmax and RH13. Tx and TWmax experienced a general increasing trend across most stations over the study period, while RH13 displayed both negative and positive trends. Vietnam’s heat stress thresholds were found to be higher than those in many other parts of the world due to the country’s location and its temperature-humidity conditions. The study identifies most parts of Vietnam have experienced an increase in heat stress days, typically ranging from 5 to 12 days per decade. Among the four seasons, summer contributed the most (50-80%) to the annual number of heat stress days in most sub-regions, except for the Central Highlands and the South where spring had the highest contribution (65-80%). Overall, this study provides useful benchmark values for future research on heat stress in Vietnam.
越南热应力的空间分布和趋势
本研究利用1979年至2018年间越南七个气候亚区68个气象站的数据,调查了越南热应力的空间分布和趋势。日最高湿球温度(TWmax)是热应力的指标,根据13:00 LST(RH13)的日最高气温(Tx)和相对湿度计算得出。结果表明,每日TWmax和Tx之间存在较强的正相关(>0.97),而每日TWmax与RH13之间的关系较弱。在研究期间,大多数台站的Tx和TWmax总体呈上升趋势,而RH13则呈现出负趋势和正趋势。由于越南的地理位置和温湿度条件,该国的热应力阈值高于世界许多其他地区。该研究表明,越南大部分地区的热应激天数增加,通常每十年增加5至12天。在四个季节中,夏季对大多数次区域的年热应激天数贡献最大(50-80%),但中部高地和南部除外,春季的贡献最大(65-80%)。总的来说,这项研究为越南未来的热应力研究提供了有用的基准值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Environment and Natural Resources Journal
Environment and Natural Resources Journal Environmental Science-Environmental Science (all)
CiteScore
1.90
自引率
0.00%
发文量
49
审稿时长
8 weeks
期刊介绍: The Environment and Natural Resources Journal is a peer-reviewed journal, which provides insight scientific knowledge into the diverse dimensions of integrated environmental and natural resource management. The journal aims to provide a platform for exchange and distribution of the knowledge and cutting-edge research in the fields of environmental science and natural resource management to academicians, scientists and researchers. The journal accepts a varied array of manuscripts on all aspects of environmental science and natural resource management. The journal scope covers the integration of multidisciplinary sciences for prevention, control, treatment, environmental clean-up and restoration. The study of the existing or emerging problems of environment and natural resources in the region of Southeast Asia and the creation of novel knowledge and/or recommendations of mitigation measures for sustainable development policies are emphasized. The subject areas are diverse, but specific topics of interest include: -Biodiversity -Climate change -Detection and monitoring of polluted sources e.g., industry, mining -Disaster e.g., forest fire, flooding, earthquake, tsunami, or tidal wave -Ecological/Environmental modelling -Emerging contaminants/hazardous wastes investigation and remediation -Environmental dynamics e.g., coastal erosion, sea level rise -Environmental assessment tools, policy and management e.g., GIS, remote sensing, Environmental -Management System (EMS) -Environmental pollution and other novel solutions to pollution -Remediation technology of contaminated environments -Transboundary pollution -Waste and wastewater treatments and disposal technology
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