近几十年来越南各地热浪的变化

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Ly Pham Thi, Ha Pham Thanh, Tan Phan Van, Yen Vu Thuan
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引用次数: 0

摘要

关于越南的热浪(HW)已经有了一些研究,但它们都集中在单个热浪特征上。对热浪的全面了解对于有效研究其影响以及制定该国气候变化减缓和适应战略的计划至关重要。研究了越南各气候分区热浪特征的空间变异性和变化趋势。该分析基于1980年至2018年144个气象站的日最高气温记录。使用相对阈值来确定HW,该阈值是夏季(4月1日至9月30日)183天内Tx的第90个百分位数。结果表明:(1)由于地理位置的不同,不同子区域和台站的高w事件阈值存在差异;(2)在全国范围内,北三角洲和中北部次区域的HWs发生频率、强度、严重程度和持续时间均高于其他地区;(3)近几十年来,越南各地,特别是北三角洲和中北部次区域,HWs的频率和严重程度都显著增加。然而,HW持续时间和强度的变化趋势尚不清楚。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variability of heatwaves across Vietnam in recent decades
There have been several studies on heatwaves (HW) in Vietnam but they all focused on an individual heatwave characteristic. A comprehensive understanding of heat waves is crucial for effective research on their impacts and for making plans for climate change mitigation and adaptation strategies in the country. This study investigates the spatial variability and changing trends in heatwave characteristics across the climatic sub-regions of Vietnam. The analysis is based on the observed daily maximum temperature (Tx) recorded at 144 meteorological stations in the period of 1980-2018. HW is identified using a relative threshold, which is the local 90th percentile of Tx within 183 days during the summer (1st April - 30th September). Results showed that: (1) The threshold values used to determine HW events varied among sub-regions and stations due to their geographical locations; (2) Across the country, HWs were observed to be more frequent, intense, severe, and longer-lasting in the North Delta and North Central sub-regions compared to others; (3) Over recent decades, both the frequency and severity of HWs have significantly increased across Vietnam, particularly in the North-Delta and North Central sub-regions. However, the changing trends in HW duration and intensity remain unclear.
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来源期刊
VIETNAM JOURNAL OF EARTH SCIENCES
VIETNAM JOURNAL OF EARTH SCIENCES GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
20.00%
发文量
0
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