兰州大学机构库 >大气科学学院
Regional trends of lightning activity in the tropics and subtropics
Qie, Kai1; Tian, WS(田文寿)1; Wang, Wuke2; Wu, XK(吴学珂)1; Yuan, T(袁铁)1; Tian, HY(田红瑛)1; Luo, JL(雒佳丽)1; Zhang, Ruhua1; Wang, Tao1
Indexed BySCIE
2020-09-15
Source PublicationATMOSPHERIC RESEARCH
ISSN0169-8095
Volume242
AbstractBased on 18 years of lightning data from 1996 to 2013 detected by optical transient detector (OTD) and lightning imaging sensor (LIS), the variation trend of lightning flash density (LFD) in the tropics and subtropics are investigated. Meteorological parameters from observational and reanalysis datasets are analyzed to understand the causes of LFD trends. The averaged LFD shows no significant trend during the period of analysis in the tropics and subtropics, while the regional LFD trends are significant. LFDs show significant negative linear trends in southeast North America (SENA), central South America (CSA) and eastern Australia (EA), with trend values of -0.26 fl km(-2) year(-1), -0.17 fl km(-2) year(-1), and - 0.14 fl km(-2) year(-1), respectively. At the same time, LFDs increased significantly in northwest South Asia (NWSA), with a trend of 0.24 fl km(-2) year(-1). Using a multiple linear regression method, the possible causes of LFD trends over these regions are investigated. The negative linear trends in SENA, CSA and EA are more likely due to the decreases of the convective available potential energy (CAPE), which may contribute -0.13 fl k( -2) year(-1), -0.14 fl km(-2) year(-1) and - 0.11 fl km(-2) year(-1) to the LFD trends in these regions, respectively. Increase of aerosol optical depth (AOD) exerts more influence on the increasing of LFD in NWSA, and could explain 0.08 fl km(-2) year(-1) of the LFD trends.
KeywordLightning activity Regional trends CAPE AOD
DOI10.1016/j.atmosres.2020.104960
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences from China[XDA17010106]
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000535422200001
PublisherELSEVIER SCIENCE INC
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/392163
Collection大气科学学院
Corresponding AuthorTian, Wenshou
Affiliation1.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China
2.China Univ Geosci, Dept Atmospher Sci, Wuhan 430074, Peoples R China
First Author AffilicationCollege of Atmospheric Sciences
Corresponding Author AffilicationCollege of Atmospheric Sciences
Recommended Citation
GB/T 7714
Qie, Kai,Tian, Wenshou,Wang, Wuke,et al. Regional trends of lightning activity in the tropics and subtropics[J]. ATMOSPHERIC RESEARCH,2020,242.
APA Qie, Kai.,Tian, Wenshou.,Wang, Wuke.,Wu, Xueke.,Yuan, Tie.,...&Wang, Tao.(2020).Regional trends of lightning activity in the tropics and subtropics.ATMOSPHERIC RESEARCH,242.
MLA Qie, Kai,et al."Regional trends of lightning activity in the tropics and subtropics".ATMOSPHERIC RESEARCH 242(2020).
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