气候变化领域集成服务门户(CCPortal): Understanding the Inter-Model Spread of PDO's Impact on Tropical Cyclone Frequency over the Western North Pacific in CMIP6 Models

CCPortal

DOI	10.3390/atmos15030276
	Understanding the Inter-Model Spread of PDO's Impact on Tropical Cyclone Frequency over the Western North Pacific in CMIP6 Models
	Feng, Jiawei; Cao, Jian; Wang, Boyang; Zhao, Kai
发表日期	2024
EISSN	2073-4433
起始页码	15
结束页码	3
卷号	15 期号:3
英文摘要	This work investigates the inter-model diversity of the Pacific Decadal Oscillation's (PDO) impact on tropical cyclone frequency (TCF) over the Western North Pacific (WNP) from the historical simulation of twenty-two Coupled Model Intercomparison Project Phase 6 (CMIP6) models. The impact of the PDO is expressed as the TCF difference between the positive and negative PDO phases. The comparison between the models with high PDO skill and low PDO skill shows that the PDO-related sea surface temperature (SST) gradient between the western and central tropical Pacific plays an important role in changing the large-scale atmospheric dynamic fields for TC genesis and, thus, the TCF over the WNP. This SST gradient also significantly contributes to the inter-model spread of PDO's impact on TCF across the 22 CMIP6 models. We, therefore, stress that the PDO-related eastward SST gradient between the western and central tropical Pacific triggers the lower troposphere westerly and eastward extending of the monsoon trough over the WNP. The moistening of the atmosphere and enhancing ascending motion in the mid-troposphere promote convection, leading to the easterly wind anomaly over the upper troposphere, which reduces the vertical wind shear. Those favorable dynamic conditions consistently promote the TC formation over the southeastern part of the Western North Pacific. Our results highlight that PDO could impact the WNP TCF through its associated tropical SST gradient.
英文关键词	CMIP6 models; PDO; tropical cyclone; climate change
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001191494000001
来源期刊	ATMOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299002
作者单位	Nanjing University of Information Science & Technology; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Feng, Jiawei,Cao, Jian,Wang, Boyang,et al. Understanding the Inter-Model Spread of PDO's Impact on Tropical Cyclone Frequency over the Western North Pacific in CMIP6 Models[J],2024,15(3).
APA	Feng, Jiawei,Cao, Jian,Wang, Boyang,&Zhao, Kai.(2024).Understanding the Inter-Model Spread of PDO's Impact on Tropical Cyclone Frequency over the Western North Pacific in CMIP6 Models.ATMOSPHERE,15(3).
MLA	Feng, Jiawei,et al."Understanding the Inter-Model Spread of PDO's Impact on Tropical Cyclone Frequency over the Western North Pacific in CMIP6 Models".ATMOSPHERE 15.3(2024).