气候变化领域集成服务门户(CCPortal): Characteristic Changes in the Strengthening Western Disturbances over Karakoram in Recent Decades

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DOI	10.1007/s13143-024-00354-8
	Characteristic Changes in the Strengthening Western Disturbances over Karakoram in Recent Decades
	Javed, Aaquib; Kumar, Pankaj
发表日期	2024
ISSN	1976-7633
EISSN	1976-7951
英文摘要	Western disturbances (WDs) are upper-tropospheric mid-latitude synoptic systems propagating eastward along the subtropical westerly jet stream. They are capable of causing extreme precipitation events and have strengthened their impact over the Karakoram part of the Himalayas in recent decades. They play a crucial role in the sustenance of the Karakoram Anomaly, which refers to the anomalous stability/surge of a few Karakoram glaciers in contrast to the other glaciers of the Himalayas. Using the existing WD-catalog derived from ERA5 and MERRA2 reanalysis datasets, we observed that the core genesis zone for Karakoram WDs had undergone a statistically significant shift of similar to 9.7 degrees E, migrating towards more favourable conditions for cyclogenesis. The study proposes a new parameter to identify regions of potential extratropical cyclogenesis. The shift can be attributed to an enhanced genesis potential, convergence, and higher moisture availability along the WD path. Composite analysis suggests that moisture availability has risen significantly over the shifted zone. Moreover, the propagation speeds of these systems have significantly declined, which explains the recent intensification of precipitation events related to WDs over the Karakoram and hints toward a crucial synoptic influence on the anomalous regional mass-balance phenomenon.
英文关键词	Western disturbances; Karakoram anomaly; Climate change; Tracking algorithm
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001162246600001
来源期刊	ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/294172
作者单位	Indian Institute of Science Education & Research (IISER) - Bhopal
推荐引用方式 GB/T 7714	Javed, Aaquib,Kumar, Pankaj. Characteristic Changes in the Strengthening Western Disturbances over Karakoram in Recent Decades[J],2024.
APA	Javed, Aaquib,&Kumar, Pankaj.(2024).Characteristic Changes in the Strengthening Western Disturbances over Karakoram in Recent Decades.ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES.
MLA	Javed, Aaquib,et al."Characteristic Changes in the Strengthening Western Disturbances over Karakoram in Recent Decades".ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES (2024).