气候变化领域集成服务门户(CCPortal): Attribution of subseasonal temperature modes as the drivers of dry and moist heat discomfort for the heat hazard monitoring over the Indian region

CCPortal

DOI	10.1007/s00382-024-07236-9
	Attribution of subseasonal temperature modes as the drivers of dry and moist heat discomfort for the heat hazard monitoring over the Indian region
	Lekshmi, S.; Chattopadhyay, Rajib; Pai, D. S.
发表日期	2024
ISSN	0930-7575
EISSN	1432-0894
英文摘要	Heatwaves are often driven by subtropical persistent highs and quasi-stationary Rossby waves along with regional factors such as soil moisture. Both temperature and humidity variability play an important role in the regional heatwave patterns. Studies have differentiated the dry and moist heatwave-related extremes both in terms of their driving mechanism and in their impact on human health. With the observed increase in the intensity, frequency and duration of heatwaves in recent decades, the impact-based forecasting and monitoring (IBF) of heatwaves has assumed significance. Current operational IBF indices, especially over the Indian region are empirical and do not necessarily consider the modal dynamics or their role in the impact of dry and moist heat-related discomfort. In this study, based on two large-scale intraseasonal modes of summer temperature variability, the driving mechanisms of dry and moist heat extremes over the Indian region are identified. The regional scale impact identified based on the Heat Index is driven by these two large-scale modes. The first mode represents the conditions conducive for the formation of the dry heat extremes. The second mode represents the regional circulation pattern that supports the moisture inflow towards the coastal states. This inflow combined with the modal temperature pattern drives the moist heat extremes over India. Based on the location of the principal components of these modes in the phase space, the heat-related health risk associated with the dominant modes is assessed. Warnings for different phases of dry and moist heat extremes occurring over the Indian region are also proposed for operational use.
英文关键词	Indian heatwave; Dry and moist heat extremes; Regional impacts; Heat-health; Hazard monitoring; Subseasonal modes of variability; Rossby waves
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001209376200002
来源期刊	CLIMATE DYNAMICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300555
作者单位	Ministry of Earth Sciences (MoES) - India; India Meteorological Department (IMD); Savitribai Phule Pune University; Ministry of Earth Sciences (MoES) - India; Indian Institute of Tropical Meteorology (IITM); Ministry of Earth Sciences (MoES) - India; India Meteorological Department (IMD)
推荐引用方式 GB/T 7714	Lekshmi, S.,Chattopadhyay, Rajib,Pai, D. S.. Attribution of subseasonal temperature modes as the drivers of dry and moist heat discomfort for the heat hazard monitoring over the Indian region[J],2024.
APA	Lekshmi, S.,Chattopadhyay, Rajib,&Pai, D. S..(2024).Attribution of subseasonal temperature modes as the drivers of dry and moist heat discomfort for the heat hazard monitoring over the Indian region.CLIMATE DYNAMICS.
MLA	Lekshmi, S.,et al."Attribution of subseasonal temperature modes as the drivers of dry and moist heat discomfort for the heat hazard monitoring over the Indian region".CLIMATE DYNAMICS (2024).